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Assessment of the Economic Efficiency of the Operation of Low-Emission and Zero-Emission Vehicles in Public Transport in the Countries of the Visegrad Group
Nov 2021
Publication
Transport is one of the key sectors of the European economy. However the intensive development of transport caused negative effects in the form of an increase in the emission of harmful substances. The particularly dramatic situation took place in the V4 countries. This made it necessary to implement solutions reducing emissions in transport including passenger transport. Such activities can be implemented in the field of implementation of low-emission and zero-emission vehicles for use. That is why the European Union and the governments of the Visegrad Group countries have developed numerous recommendations communications laws and strategies that order carriers to implement low- and zero-emission mobility. Therefore transport organizers and communication operators faced the choice of the type of buses. From an economic point of view each entrepreneur is guided by the economic efficiency of the vehicles used. Hence the main aim of the article was to conduct an economic evaluation of the operational efficiency of ecological vehicles. As more than 70% of vehicles in use in the European Union are still diesel driven the economic efficiency assessment was also made for vehicles with traditional diesel drive. To conduct the research the method of calculating the total cost of ownership of vehicles in operation was used. As a result of the research it was found that electric buses are the cheapest in the entire period of use (15 years) and then those powered by CNG. On the other hand the cost of using hydrogen buses is the highest. This is due to the high purchase prices of these vehicles. However the EU as well as the governments of individual countries support enterprises and communication operators by offering them financing for investments. The impact of the forecasted fuel and energy prices and the planned inflation on operating costs was also examined. In this case the analyses showed that the forecasted changes in fuel and energy prices as well as the expected inflation will significantly affect the costs of vehicle operation and the economic efficiency of using various types of drives. These changes will have a positive impact on the implementation of zero-emission vehicles into exploitation. Based on the analyses it was found that in 2035 hydrogen buses will have the lowest operating costs.
Reference Standard for Low Pressure Hydrogen Utilisation
May 2021
Publication
This standard has been created for the specific purposes of the Hy4Heat programme. The standard was commissioned in 2018 and this version was considered and approved by the relevant IGEM committees in May of 2020. This version of the standard was developed using the latest publicly available information at that time and may include some conservative requirements which further research may deem not necessary. The supplement will be updated regularly following the publication of new research into the application of hydrogen.
This Reference Standard aims to identify and discuss the principles required for the safety and integrity of Hydrogen installation and utilisation in premises.
This document intends to:
The standard is available to download through the IGEM website here.
This Reference Standard aims to identify and discuss the principles required for the safety and integrity of Hydrogen installation and utilisation in premises.
This document intends to:
- provide a point of reference for those requiring an understanding of the implications of using hydrogen as a distributed gas in properties
- detail the characteristics of Hydrogen
- detail the comparisons between hydrogen and Natural Gas (NG)
- discuss the safety implications of using hydrogen
- discuss the implications for materials when using hydrogen
- discuss the implications for the installation and use of using hydrogen in domestic & smaller commercial buildings.
The standard is available to download through the IGEM website here.
Review of IGEM/SR/25 for Use with Hydrogen
Jan 2021
Publication
This report presents the findings of the initial gap analysis and technical review of IGEM/SR/25 undertaken as a collaborative effort between HSE and DNV GL. The review is intended to help understand the steps which would be involved in updating the standard to include data appropriate for installations using H2 or an H2/NG blend. Furthermore the report highlights where additional research and updated data applicable to H2 installations is needed to enable development of an H2-specific supplement to the standard.<br/>A review of alternative approaches for area classification is presented. This review is aimed at determining whether existing standards or guidance provide methodologies which could be used as an alternative to IGEM/SR/25 for area classification of systems using either H2 or H2/NG blends. The review covers IGEM/SR/25 IGE/SR/23 EI15 BCGA guidance BS EN 60079:10:1 (including Quadvent) NFPA 497 API RP 505 and EIGA Doc. 121/14. Some of these are general like the British Standard BS EN 60079-10-1:2015 while others are industry specific like IGEM/SR/25 and EI15.<br/>Consideration is given to the methodology that each area classification approach presents for establishing the zone and zone size with particular focus on how factors such as ventilation and gas buoyancy are accounted for in the methods. The findings of the review indicate that none of the alternative approaches evaluated in the study provide an approach that is suitable for the gas industry for the area classification of gas network installations involving H2 or an H2/NG blend.
Concepts for Hydrogen Internal Combustion Engines and Their Implications on the Exhaust Gas Aftertreatment System
Dec 2021
Publication
Hydrogen as carbon-free fuel is a very promising candidate for climate-neutral internal combustion engine operation. In comparison to other renewable fuels hydrogen does obviously not produce CO2 emissions. In this work two concepts of hydrogen internal combustion engines (H2 -ICEs) are investigated experimentally. One approach is the modification of a state-of-the-art gasoline passenger car engine using hydrogen direct injection. It targets gasoline-like specific power output by mixture enrichment down to stoichiometric operation. Another approach is to use a heavy-duty diesel engine equipped with spark ignition and hydrogen port fuel injection. Here a diesel-like indicated efficiency is targeted through constant lean-burn operation. The measurement results show that both approaches are applicable. For the gasoline engine-based concept stoichio-metric operation requires a three-way catalyst or a three-way NOX storage catalyst as the primary exhaust gas aftertreatment system. For the diesel engine-based concept state-of-the-art selective catalytic reduction (SCR) catalysts can be used to reduce the NOx emissions provided the engine calibration ensures sufficient exhaust gas temperature levels. In conclusion while H2 -ICEs present new challenges for the development of the exhaust gas aftertreatment systems they are capable to realize zero-impact tailpipe emission operation.
Everything About Hydrogen Podcast: Highway to the Hydrogen Zone
May 2020
Publication
On this weeks episode the team discuss hydrogen for aviation with ZeroAvia. Val launched ZeroAvia to provide a genuinely zero emission flight proposition with two aircraft currently undergoing trials in California and the UK. The company is due to complete a 300 mile flight of its six seater aircraft from the Orkney islands to the Scottish mainland this summer 2020 with plans for twenty seat planes flying regional routes as early as 20205. On the show we discuss why Val set up ZeroAvia how the proposition stacks up against conventional alternatives infrastructure and plans for the future. All this and more on the show!
The podcast can be found on their website
The podcast can be found on their website
Decarbonising UK Transport: Implications for Electricity Generation, Land Use and Policy
Dec 2022
Publication
To ensure the UK’s net zero targets are met the transition from conventionally fueled transport to low emission alternatives is necessary. The impact from increased decarbonised electricity generation on ecosystem services (ES) and natural capital (NC) are not currently quantified with decarbonisation required to minimise impacts from climate change. This study aims to project the future electric and hydrogen energy demand between 2020 and 2050 for car bus and train to better understand the land/sea area that would be required to support energy generation. In this work predictions of the geospatial impact of renewable energy (onshore/offshore wind and solar) nuclear and fossil fuels on ES and NC were made considering generation mix number of generation installations and energy density. Results show that electric transport will require ~136599 GWh for all vehicle types analysed in 2050 much less than hydrogen transport at ~425532 GWh. We estimate that to power electric transport at least 1515 km2 will be required for solar 1672 km2 for wind and 5 km2 for nuclear. Hydrogen approximately doubles this requirement. Results provide an approximation of the future demands from the transport sector on land and sea area use indicating that a combined electric and hydrogen network will be needed to accommodate a range of socio-economic requirements. While robust assessments of ES and NC impacts are critical in future policies and planning significant reductions in energy demands through a modal shift to (low emission) public transport will be most effective in ensuring a sustainable transport future.
Environmental and Energy Life Cycle Analyses of Passenger Vehicle Systems Using Fossil Fuel-derived Hydrogen
Sep 2021
Publication
Hydrogen energy utilization is expected due to its environmental and energy efficiencies. However many issues remain to be solved in the social implementation of hydrogen energy through water electrolysis. This analyzes and compares the energy consumption and GHG emissions of fossil fuel-derived hydrogen and gasoline energy systems over their entire life cycle. The results demonstrate that for similar vehicle weights the hydrogen energy system consumes 1.8 MJ/km less energy and emits 0.15 kg-CO 2 eq./km fewer GHG emissions than those of the gasoline energy system. Hydrogen derived from fossil fuels may contribute to future energy systems due to its stable energy supply and economic efficiency. Lowering the power source carbon content also improved the environmental and energy efficiencies of hydrogen energy derived from fossil fuels.
Development of a Viability Assessment Model for Hydrogen Production from Dedicated Offshore Wind Farms
Jun 2020
Publication
Dedicated offshore wind farms for hydrogen production are a promising option to unlock the full potential of offshore wind energy attain decarbonisation and energy security targets in electricity and other sectors and cope with grid expansion constraints. Current knowledge on these systems is limited particularly the economic aspects. Therefore a new integrated and analytical model for viability assessment of hydrogen production from dedicated offshore wind farms is developed in this paper. This includes the formulae for calculating wind power output electrolysis plant size and hydrogen production from time-varying wind speed. All the costs are projected to a specified time using both Discounted Payback (DPB) and Net Present Value (NPV) to consider the value of capital over time. A case study considers a hypothetical wind farm of 101.3 MW situated in a potential offshore wind development pipeline off the East Coast of Ireland. All the costs of the wind farm and the electrolysis plant are for 2030 based on reference costs in the literature. Proton exchange membrane electrolysers and underground storage of hydrogen are used. The analysis shows that the DPB and NPV flows for several scenarios of storage are in good agreement and that the viability model performs well. The offshore wind farm – hydrogen production system is found to be profitable in 2030 at a hydrogen price of €5/kg and underground storage capacities ranging from 2 days to 45 days of hydrogen production. The model is helpful for rapid assessment or optimisation of both economics and feasibility of dedicated offshore wind farm – hydrogen production systems.
Macroeconomic Factors Influencing Public Policy Strategies for Blue and Green Hydrogen
Nov 2021
Publication
The aim of this paper is to analyze the factors affecting hydrogen and Carbon Capture and Storage Technologies (“CCS”) policies taking into consideration Fossil Fuel Consumption Oil Reserves the Debt/GDP Ratio the Trilemma Index and other variables with respect to OECD countries. STATA 17 was used for the analysis. The results confirm the hypothesis that countries with high fossil fuel consumption and oil reserves are investing in blue hydrogen and CCS towards a “zero-carbon-emission” perspective. Moreover countries with a good Debt/GDP ratio act most favorably to green policies by raising their Public Debt because Foreign Direct Investments are negatively correlated with those kinds of policies. Future research should exploit Green Finance policy decision criteria on green and blue hydrogen.
Calculation and Analysis of Efficiencies and Annual Performances of Power-to-Gas Systems
Mar 2017
Publication
This paper describes a generic and systematic method to calculate the efficiency and the annual performance for Power-to-Gas (PtG) systems. This approach gives the basis to analytically compare different PtG systems using different technologies under different boundary conditions. To have a comparable basis for efficiency calculations a structured break down of the PtG system is done. Until now there has not been a universal approach for efficiency calculations. This has resulted in a wide variety of efficiency calculations used in feasibility studies and for business-case calculations. For this the PtG system is divided in two sub-systems: the electrolysis and the methanation. Each of the two sub-systems consists of several subsystem boundary levels. Staring from the main unit i.e. the electrolysis stack and/or methanation reactor further units that are required to operate complete PtG system are considered with their respective subsystem boundary conditions. The paper provides formulas how the efficiency of each level can be calculated and how efficiency deviations can be integrated which are caused by the extended energy flow calculations to and from energy users and thermal losses. By this a sensitivity analysis of the sub-systems can be gained and comprehensive goal functions for optimizations can be defined. In a second step the annual performance of the system is calculated as the ratio of useable output and energetic input over one year. The input is the integral of the annual need of electrical and thermal energy of a PtG system depending on the different operation states of the plant. The output is the higher heating value of the produced gas and – if applicable – heat flows that are used externally. The annual performance not only evaluates the steady-state operating efficiency under full load but also other states of the system such as cold standby or service intervals. It is shown that for a full system operation assessment and further system concept development the annual performance is of much higher importance than the steady-state system efficiency which is usually referred to. In a final step load profiles are defined and the annual performance is calculated for a specific system configuration. Using this example different operation strategies are compared.
Supporting Hydrogen Technologies Deployment in EU Regions and Member States: The Smart Specialisation Platform on Energy (S3PEnergy)
May 2018
Publication
In order to maximise European national and regional research and innovation potential the European Union is investing in these fields through different funding mechanisms such as the ESIF or H2020 programme. This investment plan is part of the European 2020 strategy where the concept of Smart Specialisation is also included.<br/>Smart Specialisation is an innovation policy concept designed to promote the efficient and effective use of public investment in regional innovation in order to achieve economic growth. The Smart Specialisation Platform was created to support this concept by assisting regions and Member States in developing implementing and reviewing their research and innovation Smart Specialisation strategies.<br/>The Smart Specialisation Platform comprises several thematic platforms. The thematic Smart Specialisation Platform on energy (S3PEnergy) is a joint initiative of three European Commission services: DG REGIO DG ENER and the Joint Research Centre (JRC). The main objective of the S3PEnergy is to support the optimal and effective uptake of the Cohesion Policy funds for energy and to better align energy innovation activities at national local and regional level through the identification of the technologies and innovative solutions that support in the most cost-effective way the EU energy policy priorities.<br/>In the particular case of hydrogen technologies the activities of the platform are mainly focused on supporting the new Fuel Cells and Hydrogen Joint Undertaking (FCH JU) initiative involving regions and cities. To date more than 80 European cities and regions have committed to participate in this initiative through the signature of a Memorandum of Understanding and more participants are expected to join. S3PEnergy is helping in the identification of potential combination of H2020 funding (provided through FCH JU) and ESIF.<br/>To identify potential synergies among these two funding sources a mapping of the different ESIF opportunities has been performed. In order to map these opportunities Operational Programmes (OPs) and research and innovation strategies for Smart Specialisation (RIS3) of the different European regions and Member States were analysed. The results of this mapping and analysis are presented in this paper."
Political Economy of Green Hydrogen Rollout: A Global Perspective
Dec 2021
Publication
The present paper dwells on the role of green hydrogen in the transition towards climateneutral economies and reviews the central challenges for its emancipation as an economically viable source of energy. The study shows that countries with a substantial share of renewables in the energy mix advanced natural gas pipeline infrastructure and an advanced level of technological and economic development have a comparative advantage for the wider utilization of hydrogen in their national energy systems. The central conclusion this review paper is that a green hydrogen rollout in the developed and oil-exporting developing and emerging countries is not a risk for the rest of the world in terms of the increasing technological disparities and conservation of underdevelopment and concomitant socio-economic problems of the Global South. The targets anchored in Paris Agreement but even more in the EU Green Deal and the European Hydrogen Strategy will necessitate a substantial rollout of RESs in developing countries and especially in the countries of the African Union because of the prioritization of the African continent within the energy cooperation frameworks of the EU Green Deal and the EU Hydrogen Strategy. Hence the green hydrogen rollout will bridge the energy transition between Europe and Africa on the one hand and climate and development targets on the other.
Mitigation of CO Poisoning Hazard in Malfunctioning Gas Appliances Through Use of Hydrogen Blended Gas
Sep 2021
Publication
The HyDeploy project [1] has undertaken an extensive research programme to assess safety and performance of the existing UK gas appliances population fueled with natural gas / hydrogen admixtures (hydrogen blended gas). The first stage of this work [2] focused on well maintained and normally functioning appliances. This work demonstrated that unmodified gas appliances can operate safely with hydrogen blended gas (up to 20 vol% hydrogen) and the key hazard areas of carbon monoxide (CO) production light back and flame out and the operation of flame failure devices are unaffected. It is widely recognized that due to aging and variable degrees of maintenance that the combustion performance of a gas appliance will depreciate over time. In extreme cases this can lead to situations where high levels of CO may be released back into the dwelling resulting in CO poisoning to the occupants. To obtain a universal appreciation of the effect of hydrogen addition on the safety and performance of all gas appliances operation under sub optimal conditions is required and therefore it is important that the operation of malfunctioning appliances fuelled with hydrogen blended gas is assessed. A review of failure modes identified six key scenarios where the composition of the fuel gas may lead to changes in safety performance - these primarily related to the resulting composition of the flue gas but also included delayed ignition. Gas appliance faults that will increase the CO production were tested through a series of experiments to simulate fault conditions and assess the effect of hydrogen blended gas. The fault modes examined included linting flame chilling incorrect appliance set up and modification of gas valve operation. The programme utilized six different appliances tested with three methane-hydrogen fuel blends (containing 0 20 and 28.4 vol% hydrogen). In all cases the switch to hydrogen blended gas reduced CO production. The change in CO production when using hydrogen blended gas is a consequence of a decrease in the theoretical air requirement to achieve complete combustion. In some cases the amount of CO produced was identical to the nonfault baseline performance on methane thereby fully mitigating the consequence of the malfunction. In the case of very high CO production a 90% reduction was recorded when using 20 vol% hydrogen blended gas. In situations such as non-optimal boiler set up the addition of hydrogen to the gas supply would prevent the production of high levels of CO. The findings here together with the results from HyDeploy 1 [2] indicate that the safety and performance of unmodified existing UK gas appliances are not detrimentally affected when using hydrogen blended gas. Furthermore the addition of hydrogen to the fuel gas has been shown to reduce CO production under fault conditions therefore the introduction of hydrogen into the gas network may serve to mitigate the hazard posed by existing faulty appliances that are producing elevated levels of CO.
Research on Economic and Operating Characteristics of Hydrogen Fuel Cell Cars Based on Real Vehicle Tests
Nov 2021
Publication
With the increase of the requirement for the economy of vehicles and the strengthening of the concept of environmental protection the development of future vehicles will develop in the direction of high efficiency and cleanliness and the current power system of vehicles based on traditional fossil fuels will gradually transition to hybrid power. As an essential technological direction for new energy vehicles the development of fuel cell passenger vehicles is of great significance in reducing transportation carbon emissions stabilizing energy supply and maintaining the sustainable development of the automotive industry. To study the fuel economy of a passenger car with the proton exchange membrane fuel cell (PEMFC) during the operating phase two typical PEMFC passenger cars test vehicles A and B were compared and analyzed. The hydrogen consumption and hydrogen emission under two operating conditions namely the different steady-state power and the Chinese Vehicle Driving Conditions-Passenger Car cycle were tested. The test results show the actual hydrogen consumption rates of vehicle A and vehicle B are 9.77 g/kM and 8.28 g/kM respectively. The average hydrogen emission rates for vehicle A and vehicle B are 1.56 g/(kW·h) and 5.40 g/(kW·h) respectively. By comparing the hydrogen purge valve opening time ratio the differences between test vehicles A and B in control strategy hydrogen consumption and emission rate are analyzed. This study will provide reference data for China to study the economics of the operational phase of PEMFC vehicles.
Models of Delivery of Sustainable Public Transportation Services in Metropolitan Areas–Comparison of Conventional, Battery Powered and Hydrogen Fuel-Cell Drives
Nov 2021
Publication
The development of public transport systems is related to the implementation of modern and low-carbon vehicles. Over the last several years there has been a clear progress in this field. The number of electric buses has increased and the first solutions in the area of hydrogen fuel cells have been implemented. Unfortunately the implementation of these technologies is connected with significant financial expenditure. The goal of the article is the analysis of effectiveness of financial investment consisting in the purchase of 30 new public transport buses (together with the necessary infrastructure–charging stations). The analysis has been performed using the NPV method for the period of 10 years. Discount rate was determined on 4% as recommended by the European Commission for this type of project. It is based on the case study of the investment project carried out by Metropolis GZM in Poland. The article determines and compares the efficiency ratios for three investment options-purchase of diesel-powered battery-powered and hydrogen fuel-cell electric vehicles. The results of the analysis indicate that the currently high costs of vehicle purchase and charging infrastructure are a significant barrier for the implementation of battery-powered and hydrogen fuel-cell buses. In order to meet the transport policy goals related to the exchange of traditional bus stock to more eco-friendly vehicles it is necessary to involve public funds for the purpose of financing the investment activities.
Regional Insights into Low-carbon Hydrogen Scale Up: World Energy Insights Working Paper
May 2022
Publication
Following the release of the “Hydrogen on the Horizon” series in July and September 2021 the World Energy Council in collaboration with EPRI and PwC led a series of regional deep dives to understand regional differences within low-carbon hydrogen development. These regional deep dives aimed to uncover regional perspectives and differing dynamics for low-carbon hydrogen uptake.<br/>Although each region presents its own distinctive challenges and opportunities the deep dives revealed that the “regional paths” provide new insights into the global scaling up of low-carbon hydrogen in the coming years. In addition each region holds its own unique potential in achieving the Sustainable Development Goals.<br/>Key Takeaways:<br/>1. Our new regional insights indicate that low-carbon hydrogen can play a significant role by 2040 across the world by supporting countries’ efforts towards achieving Paris Agreement goals whilst contributing to the diversity and security of their energy portfolios. This would require significant global trade flows of hydrogen and hydrogen-based fuels.<br/>2. The momentum for hydrogen-based fuels is continuing to grow worldwide but differences are seen between regions – based on differing market activities and opportunities.<br/>3. Today moving from “whether” to “how” to develop low-carbon hydrogen highlights significant uncertainties which need to be addressed if hydrogen is to reach its full potential.<br/>Can the challenges in various supply chain options be overcome?<br/>Can hydrogen play a role in tackling climate change in the short term?<br/>Can bankable projects emerge and the gap between engineers and financers be bridged? Can the stability of supply of the main low-carbon hydrogen production sources be guaranteed?<br/>4. Enabling low-carbon hydrogen at scale would notably require greater coordination and cooperation amongst stakeholders worldwide to better mobilise public and private finance and to shift the focus to end-users and people through the following actions:<br/>Moving from production cost to end-use price<br/>Developing Guarantees of Origin schemes with sustainability requirements<br/>Developing a global monitoring and reporting tool on low-carbon hydrogen projects<br/>Better consideration of social impacts alongside economic opportunities
EU Carbon Diplomacy: Assessing Hydrogen Security and Policy Impact in Australia and Germany
Dec 2021
Publication
Hydrogen is fast becoming a new international “super fuel” to accelerate global climate change ambitions. This paper has two inter-weaving themes. Contextually it focuses on the potential impact of the EU’s new Carbon Border Adjustment Mechanism (CBAM) on fossil fuel-generated as opposed to green hydrogen imports. The CBAM as a transnational carbon adjustment mechanism has the potential to impact international trade in energy. It seeks both a level playing field between imports and EU internal markets (subject to ambitious EU climate change policies) and to encourage emissions reduction laggards through its “carbon diplomacy”. Countries without a price on carbon will be charged for embodied carbon in their supply chains when they export to the EU. Empirically we focus on two hydrogen export/import case studies: Australia as a non-EU state with ambitions to export hydrogen and Germany as an EU Member State reliant on energy imports. Energy security is central to energy trade debates but needs to be conceptualized beyond supply and demand economics to include geopolitics just transitions and the impacts of border carbon taxes and EU carbon diplomacy. Accordingly we apply and further develop a seven-dimension energy security-justice framework to the examples of brown blue and green hydrogen export/import hydrogen operations with varying carbon-intensity supply chains in Australia and Germany. Applying the framework we identify potential impact—risks and opportunities—associated with identified brown blue and green hydrogen export/import projects in the two countries. This research contributes to the emerging fields of international hydrogen trade supply chains and international carbon diplomacy and develops a potentially useful seven-dimension energy security-justice framework for energy researchers and policy analysts.
Catalysing Hydrogen Investment: What the Market Needs to Deliver Investment in Hydrogen Infrastructure
Oct 2021
Publication
Written by Arup in collaboration with the GIIA this report is centred on the opinions of investors from around the world gathered through a survey of GIIA members and in-depth interviews. It therefore presents the sentiments of the world’s leading fund managers insurance investors pension funds and a sovereign wealth fund. Their opinions matter because these are the decision makers that hold the purse strings when it comes to private sector investment in hydrogen infrastructure. Many of the facts about hydrogen are well-known to many readers and these are presented in this report drawing on Arup’s research and experience as a global infrastructure advisory firm. However the novelty of this report is that it looks at hydrogen through the uncompromising eyes of investors with analysis of feedback which identifies barriers to investment in the infrastructure required to enable the hydrogen economy. Perhaps most importantly it also proposes interventions that policymakers and regulators could take to overcome the barriers currently faced.<br/>Introduction The sentiments of investors are at the heart of this study with results from the survey presented at the beginning of each section to serve as a launch pad for Arup’s analysis. But we want it to be more than an interesting read; it is a call to action for policy makers to create the right environment to catalyse private sector investment and kickstart the hydrogen economy.
Safety Planning for Hydrogen and Fuel Cell Projects
Jul 2019
Publication
The document provides information on safety planning monitoring and reporting for the concerned hydrogen and fuel cell projects and programmes in Europe. It does not replace or contradict existing regulations which prevails under all circumstances. Neither is it meant to conflict with relevant international or national standards or to replace existing company safety policies codes and procedures. Instead this guidance document aims to assist in identifying minimum safety requirements hazards and associated risks and in generating a quality safety plan that will serve as an assisting guide for the inherently safer conduct of all work related to the development and operation of hydrogen and fuel cell systems and infrastructure. A safety plan should be revisited periodically as part of an overall effort to pay continuous and priority attention to the associated safety aspects and to account for all modifications of the considered system and its operations. Potential hazards failure mechanisms and related incidents associated with any work process or system should always be identified analysed reported (recorded in relevant knowledge databases e.g. HIAD 2.0 or HELLEN handbooks papers etc.) and eliminated or mitigated as part of sound safety planning and comprehensive hydrogen safety engineering which extends beyond the recommendations of this document. All relevant objects or aspects that may be adversely affected by a failure should be considered including low frequency high consequences events. So the general protection objective is to exclude or at least minimise potential hazards and associated risks to prevent impacts on the following:
- People. Hazards that pose a risk of injury or loss of life to people must be identified and eliminated or mitigated. A complete safety assessment considers not only those personnel who are directly involved in the work but also others who are at risk due to these hazards.
- Property. Damage to or loss of equipment or facilities must be prevented or minimised. Damage to equipment can be both the cause of incidents and the result of incidents. An equipment failure can result in collateral damage to nearby equipment and property which can then trigger additional equipment failures or even lead to additional hazards and risks e.g. through the domino effect. Effective safety planning monitoring and reporting considers and minimises serious risk of equipment and property damage.
- Environment. Damage to the environment must be prevented. Any aspect of a natural or the built environment which can be harmed due to a hydrogen system or infrastructure failure should be identified and analysed. A qualification of the failure modes resulting in environmental damage must be considered.
Everything About Hydrogen Podcast: Can CUTRIC Clean Canada?
Mar 2021
Publication
When the pandemic recedes lockdowns and restrictions are relaxed and eventually eliminated and millions of residents in cities across the world begin to return to their offices and workplaces public transit systems will once again be at the core of billions of commuters' daily activities. Urban transit systems are designed to move huge volumes of people through cities and communities quickly reliably and cost-efficiently (some systems accomplish these goals better than others!). The energy needed to run these networks of cars trains and buses is enormous and today most of it comes from fossil fuels. How can communities - both large and small - redesign their transit systems to eliminate operational carbon emissions in the future?
The podcast can be found on their website
The podcast can be found on their website
Solid-State Hydrogen Fuel by PSII–Chitin Composite and Application to Biofuel Cell
Dec 2021
Publication
Biomaterials attract a lot of attention as next-generation materials. Especially in the energy field fuel cells based on biomaterials can further develop clean next-generation energy and are focused on with great interest. In this study solid-state hydrogen fuel (PSII–chitin composite) composed of the photosystem II (PSII) and hydrated chitin composite was successfully created. Moreover a biofuel cell consisting of the electrolyte of chitin and the hydrogen fuel using the PSII– chitin composite was fabricated and its characteristic feature was investigated. We found that proton conductivity in the PSII–chitin composite increases by light irradiation. This result indicates that protons generate in the PSII–chitin composite by light irradiation. It was also found that the biofuel cell using the PSII–chitin composite hydrogen fuel and the chitin electrolyte exhibits the maximum power density of 0.19 mW/cm2 . In addition this biofuel cell can drive an LED lamp. These results indicate that the solid-state biofuel cell based on the bioelectrolyte “chitin” and biofuel “the PSII–chitin composite” can be realized. This novel solid-state fuel cell will be helpful to the fabrication of next-generation energy.
Everything About Hydrogen Podcast: ITM Power
Sep 2019
Publication
On this weeks show we discuss with Graham Cooley the CEO of ITM Power how his company has expanded from a research company on AIM in the early 2000’s to one of the largest electrolyser manufacturers in the world. On the show we also ask Graham to talk about how the hydrogen market has evolved where he sees the potential growth trajectory for the industry and how ITM sees its role within this space.
The podcast can be found on their website
The podcast can be found on their website
Impact Assessment of Hydrogen on Transmission Pipeline BPDs in IGEM/TD/1
Jul 2021
Publication
As part of the LTS Futures HyTechnical project IGEM requested that DNV GL undertake an assessment of the possible impact of hydrogen transmission on BPDs to support the development of supplements to the existing suite of natural gas standards to accommodate the possible future use of hydrogen. The current state of knowledge of the behaviour of large scale high pressure hydrogen releases is limited in comparison with the considerable body of data from research and operational experience of natural gas but is adequate to undertake an impact assessment to take account of the different gas outflow and fire characteristics of 100% hydrogen vs. natural gas.<br/>Calculations of the BPDs for 100% hydrogen pipeline fires on an equivalent basis to those in IGEM/TD/1 for natural gas have been performed with a degree of confidence in the results and demonstrated that the equivalent BPDs for 100% hydrogen are approximately 10% smaller than for natural gas. The results are presented graphically in this report.<br/>However hydrogen introduces the potential for substantially higher overpressures than natural gas due to the higher flame speed and wider flammable limits if delayed ignition is a credible event. The overpressure estimates presented in this report are intended to be scoping calculations to put the likely overpressures into context. The results suggest that significant overpressures are possible at the BPDs but there is a lack of evidence to support the estimation of the overpressures following delayed ignition of a large turbulent hydrogen release in the open (in contrast to explosions in confined or congested regions) and there is a high degree of uncertainty in the predictions presented here. It is therefore recommended that large scale pipeline rupture experiments are performed similar to those undertaken previously for hydrogen natural gas and natural gas/hydrogen mixtures but with ignition engineered to take place after a short delay in order to measure the overpressures and provide the means to validate or refine the predictions made.<br/>The analysis has highlighted limitations in the original method of calculating BPDs in IGEM/TD/1 which reflects the techniques available at the time approximately 40 years ago. Since then understanding of the hazards from pipeline failures and the ability to model the consequences and predict the associated risks to people in the surrounding area have advanced very considerably facilitated by software tools and documented in standards such as IGEM/TD/2. These methods allow the highly transient nature of a high pressure gas pipeline rupture release to be modelled more accurately and for the thermal effects of fires on people and buildings to be calculated taking account of the time-varying thermal dose.<br/>For these reasons a simple comparison of the possible overpressure effects of delayed ignition of a 100% hydrogen release at the BPDs can be misleading and implies that the overpressure hazards could be more severe than those for fires which may not be the case. Example calculations have been performed for a representative pipeline case which indicate that using current methods the predicted thermal hazard distances for 100% hydrogen pipeline fires (house burning and escape for people) are substantially greater than those estimated for overpressures following delayed ignition for similar levels of vulnerability. This report addresses buried pipelines only – the potential for more severe explosion overpressure effects for hydrogen releases may be more significant for Above Ground Installations (AGIs) especially where congestion or confinement may be present. It is recommended that similar studies are conducted to quantify the effect of hydrogen conversion on the consequences and risks associated with hydrogen releases at AGIs.<br/>Finally it is stressed that the analysis in this report does not consider the relative risks for 100% hydrogen and the equivalent natural gas pipelines. There remain uncertainties in the failure frequencies for steel pipelines transporting hydrogen and particularly the probability of immediate and delayed ignition. The likelihood of delayed ignition of a large turbulent high pressure hydrogen gas pipeline rupture release may be very low due to the wider flammability limits and lower minimum ignition energy for hydrogen compared with natural gas. Additional research is currently ongoing or planned to address the gaps in knowledge for 100% hydrogen which should allow more robust comparisons of the relative risks to be made in the future.
Solid-State Hydrogen Storage Systems and the Relevance of a Gender Perspective
Sep 2021
Publication
This paper aims at addressing the exploitation of solid-state carriers for hydrogen storage with attention paid both to the technical aspects through a wide review of the available integrated systems and to the social aspects through a preliminary overview of the connected impacts from a gender perspective. As for the technical perspective carriers to be used for solid-state hydrogen storage for various applications can be classified into two classes: metal and complex hydrides. Related crystal structures and corresponding hydrogen sorption properties are reviewed and discussed. Fundamentals of thermodynamics of hydrogen sorption evidence the key role of the enthalpy of reaction which determines the operating conditions (i.e. temperatures and pressures). In addition it rules the heat to be removed from the tank during hydrogen absorption and to be delivered to the tank during hydrogen desorption. Suitable values for the enthalpy of hydrogen sorption reaction for operating conditions close to ambient (i.e. room temperature and 1–10 bar of hydrogen) are close to 30 kJ·molH2 −1 . The kinetics of the hydrogen sorption reaction is strongly related to the microstructure and to the morphology (i.e. loose powder or pellets) of the carriers. Usually the kinetics of the hydrogen sorption reaction is rather fast and the thermal management of the tank is the rate-determining step of the processes. As for the social perspective the paper arguments that as it occurs with the exploitation of other renewable innovative technologies a wide consideration of the social factors connected to these processes is needed to reach a twofold objective: To assess the extent to which a specific innovation might produce positive or negative impacts in the recipient socioeconomic system and from a sociotechnical perspective to explore the potential role of the social components and dynamics in fostering the diffusion of the innovation itself. Within the social domain attention has been paid to address the underexplored relationship between the gender perspective and the enhancement of hydrogen-related energy storage systems. This relationship is taken into account both in terms of the role of women in triggering the exploitation of hydrogen-based storage playing as experimenter and promoter and in terms of the intertwined impact of this innovation in their current conditions at work and in daily life.
Hydrogen-electricity Hybrid Energy Pipelines for Railway Transportation: Design and Economic Evaluation
Mar 2024
Publication
With the decarbonization and electrification of modern railway transportation the demand for both the highcapacity electrical energy and hydrogen fuel energy is increasingly high. A novel scheme was proposed from liquid hydrogen production by surplus wind and solar energy to liquid hydrogen-electricity hybrid energy transmission for railway transportation. The 100 MW hybrid energy transmission pipeline was designed with the 10 kA/1.5 kV superconducting DC cable for electricity and cryogenic layers for liquid hydrogen and liquid nitrogen showing strong capability in transmitting “electricity + cold energy + chemical energy” simultaneously. Economic evaluation was performed with respect to the energy equipment capacity and costs with sensitivity and profitability analysis. With the discount rate 8% the dynamic payback period of the hybrid energy pipeline was 7.1 years. Results indicated that the shortest dynamic payback period of the hybrid energy pipeline was 4.8 years with the maximum transmission distance 93 km. Overall this article shows the novel concept and design of liquid hydrogen-electricity hybrid energy pipelines and proves the technical and economic feasibilities for future bulk hybrid energy transmission for railway transportation.
Shipping the Sunshine: An Open-source Model for Costing Renewable Hydrogen Transport from Australia
Apr 2022
Publication
Green hydrogen (H2) is emerging as a future clean energy carrier. While there exists significant analysis on global renewable (and non-renewable) hydrogen generation costs analysis of its transportation costs irrespective of production method is still limited. Complexities include the different forms in which hydrogen can be transported the limited experience to date in shipping some of these carrier forms the trade routes potentially involved and the possible use of different shipping fuels. Herein we present an open-source model developed to assist stakeholders in assessing the costs of shipping various forms of hydrogen over different routes. It includes hydrogen transport in the forms of liquid hydrogen (LH2) ammonia liquified natural gas (LNG) methanol and liquid organic hydrogen carriers (LOHCs). It considers both fixed and variable costs including port fees possible canal usage charges fuel costs ship capital and operating costs boil-off losses and possible environmental taxes among many others. The model is applied to the Rotterdam-Australia route as a case study revealing ammonia ($0.56/kgH2) and methanol ($0.68/kgH2) as the least expensive hydrogen derivatives to transport followed by liquified natural gas ($1.07/kgH2) liquid organic hydrogen carriers ($1.37/kgH2) and liquid hydrogen ($2.09/kgH2). While reducing the transportation distance led to lower shipping costs we note that the merit order of assumed underlying shipping costs remain unchanged. We also explore the impact of using hydrogen (or the hydrogen carrier) as a low/zero carbon emission fuel for the ships which led to lowering of costs for liquified natural gas ($0.88/kgH2) a similar cost for liquid hydrogen ($2.19/kgH2) and significant increases for the remainder. Given our model is open-sourced it can be adapted globally and updated to match the changing cost dynamics of the emerging green hydrogen market.
Finding Synergy Between Renewables and Coal: Flexible Power and Hydrogen Production from Advanced IGCC Plants with Integrated CO2 Capture
Feb 2021
Publication
Variable renewable energy (VRE) has seen rapid growth in recent years. However VRE deployment requires a fleet of dispatchable power plants to supply electricity during periods with limited wind and sunlight. These plants will operate at reduced utilization rates that pose serious economic challenges. To address this challenge this paper presents the techno-economic assessment of flexible power and hydrogen production from integrated gasification combined cycles (IGCC) employing the gas switching combustion (GSC) technology for CO2 capture and membrane assisted water gas shift (MAWGS) reactors for hydrogen production. Three GSC-MAWGS-IGCC plants are evaluated based on different gasification technologies: Shell High Temperature Winkler and GE. These advanced plants are compared to two benchmark IGCC plants one without and one with CO2 capture. All plants utilize state-of-the-art H-class gas turbines and hot gas clean-up for maximum efficiency. Under baseload operation the GSC plants returned CO2 avoidance costs in the range of 24.9–36.9 €/ton compared to 44.3 €/ton for the benchmark. However the major advantage of these plants is evident in the more realistic mid-load scenario. Due to the ability to keep operating and sell hydrogen to the market during times of abundant wind and sun the best GSC plants offer a 6–11%-point higher annual rate of return than the benchmark plant with CO2 capture. This large economic advantage shows that the flexible GSC plants are a promising option for balancing VRE provided a market for the generated clean hydrogen exists.
Dynamic Emulation of a PEM Electrolyzer by Time Constant Based Exponential Model
Feb 2019
Publication
The main objective of this paper is to develop a dynamic emulator of a proton exchange membrane (PEM) electrolyzer (EL) through an equivalent electrical model. Experimental investigations have highlighted the capacitive effect of EL when subjecting to dynamic current profiles which so far has not been reported in the literature. Thanks to a thorough experimental study the electrical domain of a PEM EL composed of 3 cells has been modeled under dynamic operating conditions. The dynamic emulator is based on an equivalent electrical scheme that takes into consideration the dynamic behavior of the EL in cases of sudden variation in the supply current. The model parameters were identified for a suitable current interval to consider them as constant and then tested with experimental data. The obtained results through the developed dynamic emulator have demonstrated its ability to accurately replicate the dynamic behavior of a PEM EL.
Everything About Hydrogen Podcast: Hydrogen in the E-Mobility Sector
Oct 2021
Publication
Quantron AG was created in 2019 as a high-tech spin-off of the well-known Haller GmbH & Co. KG with the vision of paving the way for e-mobility in inner-city and regional passenger and cargo transportation. Quantron AG combines innovative ability and expertise in e-vans e-trucks and e-buses with the long-standing knowledge and experience of Haller GmbH & Co. KG in the commercial vehicle sector. The company's approach to e-Mobility is defined by its commitment to leveraging the most effective zero-emission vehicle technology for the use case which means Quantron is building both hydrogen fuel cell electric vehicles (FCEVs) and battery electric vehicles (BEVs) for its clients.
The podcast can be found on the website
The podcast can be found on the website
From Renewable Energy to Sustainable Protein Sources: Advancement, Challenges, and Future Roadmaps
Jan 2022
Publication
The concerns over food security and protein scarcity driven by population increase and higher standards of living have pushed scientists toward finding new protein sources. A considerable proportion of resources and agricultural lands are currently dedicated to proteinaceous feed production to raise livestock and poultry for human consumption. The 1st generation of microbial protein (MP) came into the market as land-independent proteinaceous feed for livestock and aquaculture. However MP may be a less sustainable alternative to conventional feeds such as soybean meal and fishmeal because this technology currently requires natural gas and synthetic chemicals. These challenges have directed researchers toward the production of 2nd generation MP by integrating renewable energies anaerobic digestion nutrient recovery biogas cleaning and upgrading carbon-capture technologies and fermentation. The fermentation of methane-oxidizing bacteria (MOB) and hydrogen-oxidizing bacteria (HOB) i.e. two protein rich microorganisms has shown a great potential on the one hand to upcycle effluents from anaerobic digestion into protein rich biomass and on the other hand to be coupled to renewable energy systems under the concept of Power-to-X. This work compares various production routes for 2nd generation MP by reviewing the latest studies conducted in this context and introducing the state-of-the-art technologies hoping that the findings can accelerate and facilitate upscaling of MP production. The results show that 2nd generation MP depends on the expansion of renewable energies. In countries with high penetration of renewable electricity such as Nordic countries off-peak surplus electricity can be used within MP-industry by supplying electrolytic H2 which is the driving factor for both MOB and HOB-based MP production. However nutrient recovery technologies are the heart of the 2nd generation MP industry as they determine the process costs and quality of the final product. Although huge attempts have been made to date in this context some bottlenecks such as immature nutrient recovery technologies less efficient fermenters with insufficient gas-to-liquid transfer and costly electrolytic hydrogen production and storage have hindered the scale up of MP production. Furthermore further research into techno-economic feasibility and life cycle assessment (LCA) of coupled technologies is still needed to identify key points for improvement and thereby secure a sustainable production system.
Everything About Hydrogen Podcast: Hydrogen, Net Zero and Circularity a Perfect Syzygy!
Jul 2020
Publication
On this week's show we speak with Trevor Best CEO of Syzygy Plasmonics a Houston area startup who is a pioneer in the field of photocatalytic based hydrogen production. The company has recently closed its series A funding round. We discuss with Trevor the potential applications of the Syzygy approach and where they are aiming to engage the market first as well as his view of the evolution of the hydrogen market today. All this and more on the show!
The podcast can be found on their website
The podcast can be found on their website
Analysis of Standard and Innovative Methods for Allocating Upstream and Refinery GHG Emissions to Oil Products
Sep 2017
Publication
Alternative fuel policies need accurate and transparent methods to find the embedded carbon intensity of individual refinery products. This study investigates different ways of allocating greenhouse gases emissions deriving from refining and upstream crude oil supply. Allocation methods based on mass energy content economic value and innovatively added-value are compared with the marginal refining emissions calculated by CONCAWE’s linear-programming model to the average EU refinery which has been adopted as reference in EU legislation. Beside the most important transportation fuels (gasoline diesel kerosene/jet fuel and heavy fuel oil) the analysis extends to petroleum coke and refinery hydrogen. Moreover novel criteria based on the implications due to hydrogen usage by each fuel pathway have been introduced to test the consistency of the analyzed approaches. It is found that only two economic-based allocation methods are consistent with the introduced criteria. These two methods also give negative refinery emissions for heavy products which is coherent with the marginal emissions calculated through the CONCAWE refinery model. The recommended allocation methods are transparent and use only publicly available statistical data so they may be useful not only for future EU legislation but also in jurisdictions where a representative refinery model is not available.
Modeling Hydrogen Refueling Infrastructure to Support Passenger Vehicles
May 2018
Publication
The year 2014 marked hydrogen fuel cell electric vehicles (FCEVs) first becoming commercially available in California where significant investments are being made to promote the adoption of alternative transportation fuels. A refueling infrastructure network that guarantees adequate coverage and expands in line with vehicle sales is required for FCEVs to be successfully adopted by private customers. In this paper we provide an overview of modelling methodologies used to project hydrogen refueling infrastructure requirements to support FCEV adoption and we describe in detail the National Renewable Energy Laboratory’s scenario evaluation and regionalization analysis (SERA) model. As an example we use SERA to explore two alternative scenarios of FCEV adoption: one in which FCEV deployment is limited to California and several major cities in the United States; and one in which FCEVs reach widespread adoption becoming a major option as passenger vehicles across the entire country. Such scenarios can provide guidance and insights for efforts required to deploy the infrastructure supporting transition toward different levels of hydrogen use as a transportation fuel for passenger vehicles in the United States.
Everything About Hydrogen Podcast: Storage for the Future!
Jan 2022
Publication
For our first episode of 2022 we invited Jørn Helge Dahl Global Director of Sales&Marketing at Hexagon Purus to talk about hydrogen storage with the EAH podcast and to explain the types of solutions available today Hexagon's history and plans for the future alongside some commentary on US hydrogen strategy from the gang.
The podcast can be found on their website
The podcast can be found on their website
A New Energy System Based on Biomass Gasification for Hydrogen and Power Production
Apr 2020
Publication
In this paper a new gasification system is developed for the three useful outputs of electricity heat and hydrogen and reported for practical energy applications. The study also investigates the composition of syngas leaving biomass gasifier. The composition of syngas is represented by the fractions of hydrogen carbon dioxide carbon monoxide and water. The integrated energy system comprises of an entrained flow gasifier a Cryogenic Air Separation (CAS) unit a double-stage Rankine cycle Water Gas Shift Reactor (WGSR) a combined gas–steam power cycle and a Proton Exchange Membrane (PEM) electrolyzer. The whole integrated system is modeled in the Aspen plus 9.0 excluding the PEM electrolyzer which is modeled in Engineering Equation Solver (EES). A comprehensive parametric investigation is conducted by varying numerous parameters like biomass flow rate steam flow rate air input flow rate combustion reactor temperature and power supplied to the electrolyzer. The system is designed in a way to supply the power produced by the steam Rankine cycle to the PEM electrolyzer for hydrogen production. The overall energy efficiency is obtained to be 53.7% where the exergy efficiency is found to be 45.5%. Furthermore the effect of the biomass flow rate is investigated on the various system operational parameters.
Demonstration of a kW-scale Solid Oxide Fuel Cell-calciner for Power Generation and Production of Calcined Materials
Aug 2019
Publication
Carbonate looping (CaL) has been shown to be less energy-intensive when compared to mature carbon capture technologies. Further reduction in the efficiency penalties can be achieved by employing a more efficient source of heat for the calcination process instead of oxy-fuel combustion. In this study a kW-scale solid oxide fuel cell (SOFC)-integrated calciner was designed and developed to evaluate the technical feasibility of simultaneously generating power and driving the calcination process using the high-grade heat of the anode off-gas. Such a system can be integrated with CaL systems or employed as a negative-emission technology where the calcines are used to capture CO2 from the atmosphere. The demonstration unit consisted of a planar SOFC stack operating at 750 °C and a combined afterburner/calciner to combust hydrogen slip from the anode off-gas and thermally decompose magnesite dolomite and limestone. The demonstrator generated up to 2 kWelDC power achieved a temperature in the range of 530–550 °C at the inlet of the afterburner and up to 678 °C in the calciner which was sufficient to demonstrate full calcination of magnesite and partial calcination of dolomite. However in order to achieve the temperature required for calcination of limestone further scale-up and heat integration are needed. These results confirmed technical feasibility of the SOFC-calciner concept for production of calcined materials either for the market or for direct air capture (DAC).
Electric Mobility in Portugal: Current Situation and Forecasts for Fuel Cell Vehicles
Nov 2021
Publication
In recent years the growing concern for air quality has led to the development of sustainable vehicles to replace conventional internal combustion engine (ICE) vehicles. Currently the most widespread technology in Europe and Portugal is that of Battery Electric Vehicles (BEV) or plug‐in HEV (PHEV) electric cars but hydrogen‐based transport has also shown significant growth in the commercialization of Fuel Cell Electric Vehicles (FCEV) and in the development of new infrastructural schemes. In the current panorama of EV particular attention should be paid to hydrogen technology i.e. FCEVs which is potentially a valid alternative to BEVs and can also be hybrid (FCHEV) and plug‐in hybrid (FCPHEV). Several sources cited show a positive trend of hydrogen in the transport sector identifying a growing trend in the expansion of hydrogen infrastructure although at this time it is still at an early stage of development. At the moment the cost of building the infrastructure is still high but on the basis of medium/long‐term scenarios it is clear that investments in hydrogen refueling stations will be profitable if the number of Fuel Cell vehicles increases. Conversely the Fuel Cell vehicle market is hampered if there is no adequate infrastructure for hydrogen development. The opportunity to use Fuel Cells to store electrical energy is quite fascinating and bypasses some obstacles encountered with BEVs. The advantages are clear since the charging times are reduced compared to charging from an electric charging post and the long‐distance voyage is made easier as the autonomy is much larger i.e. the psycho‐ sociological anxiety is avoided. Therefore the first part of the paper provides an overview of the current state of electric mobility in Portugal and the strategies adopted by the country. This is necessary to have a clear vision of how a new technology is accepted by the population and develops on the territory that is the propensity of citizens to technological change. Subsequently using current data on EV development and comparing information from recent years this work aims to investigate the future prospects of FCEVs in Portugal by adopting a dynamic model called SERA (Scenario Evaluation and Regionalization Analysis) with which it is possible to identify the Portuguese districts and cities where an FC charging infrastructure is expected to be most beneficial. From the results obtained the districts of Lisbon Porto and Aveiro seem to be the most interested in adopting FC technology. This analysis aims to ensure a measured view of the credible development of this market segment.
Everything About Hydrogen Podcast: Electron Stewardship in the Orkney Islands
Nov 2019
Publication
On this weeks episode the team are talking all things hydrogen in the Orkneys with Adele Lidderdale (Hydrogen Officer for Orkney Island Council) and Jon Clipsham (Hydrogen Manager EMEC). While the islands are best known for their exceptional wildlife whisky and cruise ships the Orkney islands have also emerged as a hub for the green hydrogen economy. Working alongside local government community groups research agencies and private sector partners the islands have deployed hydrogen solutions to heat a school power ferries in port move local council workers from A to B and in the future perhaps make Gin?! All this and more on the show.
The podcast can be found on their website
The podcast can be found on their website
Gasification of Solid Fuels (Coal, Biomass and MSW): Overview, Challenges and Mitigation Strategies
Jun 2022
Publication
Currently hydrogen energy is the most promising energy vector while gasification is one of the major routes for its production. However gasification suffers from various issues including slower carbon conversion poor syngas quality lower heating value and higher emissions. Multiple factors affect gasification performance such as the selection of gasifiers feedstock’s physicochemical properties and operating conditions. In this review the status of gasification key gasifier technologies and the effect of solid-fuel (i.e. coal biomass and MSW) properties on gasification performance are reviewed critically. Based on the current review the co-gasification of coal biomass and solid waste along with a partial utilisation of CO2 as a reactant are suggested. Furthermore a technological breakthrough in carbon capture and sequestration is needed to make it industrially viable
Integrating a Top-Gas Recycling and CO2 Electrolysis Process for H2-Rich Gas Injection and Reduce CO2 Emissions from an Ironmaking Blast Furnace
Mar 2022
Publication
Introducing CO2 electrochemical conversion technology to the iron-making blast furnace not only reduces CO2 emissions but also produces H2 as a byproduct that can be used as an auxiliary reductant to further decrease carbon consumption and emissions. With adequate H2 supply to the blast furnace the injection of H2 is limited because of the disadvantageous thermodynamic characteristics of the H2 reduction reaction in the blast furnace. This paper presents thermodynamic analysis of H2 behaviour at different stages with the thermal requirement consideration of an iron-making blast furnace. The effect of injecting CO2 lean top gas and CO2 conversion products H2–CO gas through the raceway and/or shaft tuyeres are investigated under different operating conditions. H2 utilisation efficiency and corresponding injection volume are studied by considering different reduction stages. The relationship between H2 injection and coke rate is established. Injecting 7.9–10.9 m3/tHM of H2 saved 1 kg/tHM coke rate depending on injection position. Compared with the traditional blast furnace injecting 80 m3/tHM of H2 with a medium oxygen enrichment rate (9%) and integrating CO2 capture and conversion reduces CO2 emissions from 534 to 278 m3/tHM. However increasing the hydrogen injection amount causes this iron-making process to consume more energy than a traditional blast furnace does.
Resilience-oriented Schedule of Microgrids with Hybrid Energy Storage System using Model Predictive Control
Nov 2021
Publication
Microgrids can be regarded as a promising solution by which to increase the resilience of power systems in an energy paradigm based on renewable generation. Their main advantage is their ability to work as islanded systems under power grid outage conditions. Microgrids are usually integrated into electrical markets whose schedules are carried out according to economic aspects while resilience criteria are ignored. This paper shows the development of a resilience-oriented optimization for microgrids with hybrid Energy Storage System (ESS) which is validated via numerical simulations. A hybrid ESS composed of hydrogen and batteries is therefore considered with the objective of improving the autonomy of the microgrid while achieving a rapid transition response. The control problem is formulated using Stochastic Model Predictive Control (SMPC) techniques in order to take into account possible transitions between grid-connected and islanded modes at all the sample instants of the schedule horizon (SH). The control problem is developed by considering a healthy operation of the hybrid ESS thus avoiding degradation issues. The plant is modeled using the Mixed Logic Dynamic (MLD) framework owing to the presence of logic and dynamic control variables.
Safety Assessment of Hydrogen Jet Fire Scenarios within Semi-Confined Spaces
Jan 2023
Publication
Hydrogen fuel cell vehicle (HFCV) technology poses great promise as an alternative to significantly reduce the environmental impact of the transport sector’s emissions. However hydrogen fuel cell technology is relatively new therefore confirmation of the reliability and safety analysis is still required particularly for fire scenarios within confined spaces such as tunnels. This study applied the computational fluid dynamics (CFD) simulations in conjunction with probabilistic calculation methods to determine the associated thermal risk of a hydrogen jet fire in a tunnel and its dependency on scenarios with different tunnel slopes longitudinal and transverse ventilation velocities and fire positions. A large-scale model of 102 m in which the effects of outlined parameter variations on the severity of the fire incident were analysed. It is found that both tunnel ventilation techniques and slope were critical for the effective ejection of accumulated heat. With ventilation playing a primary role in the ejection of heat and gas and slope ensuring the stability of the ejected heat probabilities of thermal burns were found to be reduced by up to approximately 35% with a strong suggestion of critical combinations to further reduce the dangers of hydrogen tunnel fires.
Hydrogen Production Cost Forecasts since the 1970s and Implications for Technological Development
Jun 2022
Publication
This study reviews the extant literature on hydrogen production cost forecasts to identify and analyze the historical trend of such forecasts in order to explore the feasibility of wider adoption. Hydrogen is an important energy source that can be used to achieve a carbon-neutral society but the widespread adoption of hydrogen production technologies is hampered by the high costs. The production costs vary depending on the technology employed: gray renewable electrolysis or biomass. The study identifies 174 production cost forecast data points from articles published between 1979 and 2020 and makes a comparative assessment using non-parametric statistical tests. The results show three different cost forecast trends across technologies. First the production cost of gray hydrogen showed an increasing trend until 2015 but started declining after 2015. Second the renewable electrolysis hydrogen cost was the highest of all but has shown a gradual declining trend since 2015. Finally the biomass hydrogen cost has been relatively cheaper up until 2015 after which it became the highest. Renewable electrolysis and biomass hydrogen will be potential candidates (as principal drivers) to reduce CO2 emissions in the future but renewable electrolysis hydrogen is more promising in this regard due to its declining production cost trend. Gray hydrogen can also be an alternative candidate to renewable electrolysis hydrogen because it can be equipped with carbon capture storage (CCS) to produce blue hydrogen although we need to consider additional production costs incurred by the introduction of CCS. The study discusses the technological development and policy implications of the results on hydrogen production costs.
Analysis of Trends and Emerging Technologies in Water Electrolysis Research Based on a Computational Method: A Comparison with Fuel Cell Research
Feb 2018
Publication
Water electrolysis for hydrogen production has received increasing attention especially for accumulating renewable energy. Here we comprehensively reviewed all water electrolysis research areas through computational analysis using a citation network to objectively detect emerging technologies and provide interdisciplinary data for forecasting trends. The results show that all research areas increase their publication counts per year and the following two areas are particularly increasing in terms of number of publications: “microbial electrolysis” and “catalysts in an alkaline water electrolyzer (AWE) and in a polymer electrolyte membrane water electrolyzer (PEME).”. Other research areas such as AWE and PEME systems solid oxide electrolysis and the whole renewable energy system have recently received several review papers although papers that focus on specific technologies and are cited frequently have not been published within the citation network. This indicates that these areas receive attention but there are no novel technologies that are the center of the citation network. Emerging technologies detected within these research areas are presented in this review. Furthermore a comparison with fuel cell research is conducted because water electrolysis is the reverse reaction to fuel cells and similar technologies are employed in both areas. Technologies that are not transferred between fuel cells and water electrolysis are introduced and future water electrolysis trends are discussed.
Fracture Properties of Welded 304L in Hydrogen Environments
Sep 2021
Publication
Austenitic stainless steels are used for hydrogen containment of high-pressure hydrogen gas due to their ability to retain high fracture properties despite the degradation due to hydrogen. Forging and other strain-hardening processes are desirable for austenitic stainless steels to increase the material strength and thus accommodate higher stresses and reduce material costs. Welding is often necessary for assembling components but it represents an area of concern in pressure containment structures due to the potential for defects more environmentally susceptible microstructure and reduced strength. Electron beam (EB) welding represent an advanced joining process which has advantages over traditional arc welding techniques through reduced input heat and reduced heat-affected zone (HAZ) microstructure and thus present a means to maintain high strength and improve weld performance in hydrogen gas containment. In this study fracture coupons were extracted from EB welds in forged 304L and subjected to thermal gaseous hydrogen precharging at select pressures to introduce different levels of internal hydrogen content. Fracture tests were then performed on hydrogen precharged coupons at temperatures of both 293 K and 223 K. It was observed that fracture resistance (JH) was dependent on internal hydrogen concentration; higher hydrogen concentrations resulted in lower fracture resistance in both the forged 304L base material and the 304L EB welds. This trend was also apparent at both temperatures: 293 K and 223 K. EB weld samples however maintain high fracture resistance comparable to the forged 304L base material. The role of weld microstructure solidification on fracture is discussed.
Reversible Solid-oxide Cell Stack Based Power-to-x-to-power Systems: Comparison of Thermodynamic Performance
Jun 2020
Publication
The increasing penetration of variable renewable energies poses new challenges for grid management. The economic feasibility of grid-balancing plants may be limited by low annual operating hours if they work either only for power generation or only for power storage. This issue might be addressed by a dual-function power plant with power-to-x capability which can produce electricity or store excess renewable electricity into chemicals at different periods. Such a plant can be uniquely enabled by a solid-oxide cell stack which can switch between fuel cell and electrolysis with the same stack. This paper investigates the optimal conceptual design of this type of plant represented by power-to-x-to-power process chains with x being hydrogen syngas methane methanol and ammonia concerning the efficiency (on a lower heating value) and power densities. The results show that an increase in current density leads to an increased oxygen flow rate and a decreased reactant utilization at the stack level for its thermal management and an increased power density and a decreased efficiency at the system level. The power-generation efficiency is ranked as methane (65.9%) methanol (60.2%) ammonia (58.2%) hydrogen (58.3%) syngas (53.3%) at 0.4 A/cm2 due to the benefit of heat-to-chemical-energy conversion by chemical reformulating and the deterioration of electrochemical performance by the dilution of hydrogen. The power-storage efficiency is ranked as syngas (80%) hydrogen (74%) methane (72%) methanol (68%) ammonia (66%) at 0.7 A/cm2 mainly due to the benefit of co-electrolysis and the chemical energy loss occurring in the chemical synthesis reactions. The lost chemical energy improves plant-wise heat integration and compensates for its adverse effect on power-storage efficiency. Combining these efficiency numbers of the two modes results in a rank of round-trip efficiency: methane (47.5%)>syngas (43.3%) ≈ hydrogen (42.6%)>methanol (40.7%)>ammonia (38.6%). The pool of plant designs obtained lays the basis for the optimal deployment of this balancing technology for specific applications.
Boosting the H2 Production Efficiency via Photocatalytic Organic Reforming: The Role of Additional Hole Scavenging System
Nov 2021
Publication
The simultaneous photocatalytic H2 evolution with environmental remediation over semiconducting metal oxides is a fascinating process for sustainable fuel production. However most of the previously reported photocatalytic reforming showed nonstoichiometric amounts of the evolved H2 when organic substrates were used. To explain the reasons for this phenomenon a careful analysis of the products and intermediates in gas and aqueous phases upon the photocatalytic hydrogen evolution from oxalic acid using Pt/TiO2 was performed. A quadrupole mass spectrometer (QMS) was used for the continuous flow monitoring of the evolved gases while high performance ion chromatography (HPIC) isotopic labeling and electron paramagnetic resonance (EPR) were employed to understand the reactions in the solution. The entire consumption of oxalic acid led to a ~30% lower H2 amount than theoretically expected. Due to the contribution of the photoKolbe reaction mechanism a tiny amount of formic acid was produced then disappeared shortly after the complete consumption of oxalic acid. Nevertheless a much lower concentration of formic acid was generated compared to the nonstoichiometric difference between the formed H2 and the consumed oxalic acid. Isotopic labeling measurements showed that the evolved H2 HD and/or D2 matched those of the solvent; however using D2O decreased the reaction rate. Interestingly the presence of KI as an additional hole scavenger with oxalic acid had a considerable impact on the reaction mechanism and thus the hydrogen yield as indicated by the QMS and the EPR measurements. The added KI promoted H2 evolution to reach the theoretically predictable amount and inhibited the formation of intermediates without affecting the oxalic acid degradation rate. The proposed mechanism by which KI boosts the photocatalytic performance is of great importance in enhancing the overall energy efficiency for hydrogen production via photocatalytic organic reforming.
Using Multicriteria Decision Making to Evaluate the Risk of Hydrogen Energy Storage and Transportation in Cities
Jan 2023
Publication
Hydrogen is an environmentally friendly source of renewable energy. Energy generation from hydrogen has not yet been widely commercialized due to issues related to risk management in its storage and transportation. In this paper the authors propose a hybrid multiple-criteria decision-making (MCDM)-based method to manage the risks involved in the storage and transportation of hydrogen (RSTH). First we identified the key points of the RSTH by examining the relevant literature and soliciting the opinions of experts and used this to build a prototype of its decision structure. Second we developed a hybrid MCDM approach called the D-ANP that combined the decision-making trial and evaluation laboratory (DEMENTEL) with the analytic network process (ANP) to obtain the weight of each point of risk. Third we used fuzzy evaluation to assess the level of the RSTH for Beijing China where energy generation using hydrogen is rapidly advancing. The results showed that the skills of the personnel constituted the most important risk-related factor and environmental volatility and the effectiveness of feedback were root factors. These three factors had an important impact on other factors influencing the risk of energy generation from hydrogen. Training and technical assistance can be used to mitigate the risks arising due to differences in the skills of personnel. An appropriate logistics network and segmented transportation for energy derived from hydrogen should be implemented to reduce environmental volatility and integrated supply chain management can help make the relevant feedback more effective.
Everything About Hydrogen Podcast: Costs, Cost, Costs!
Aug 2020
Publication
On this week's episode of Everything About Hydrogen the team are celebrating the show's one year anniversary with Randy MacEwen the CEO of Ballard Power Systems. On the show the team ask Randy to explain the stunning rise of hydrogen over the last 12-24 months how the use cases for hydrogen are evolving and how the growing capitalisation of listed businesses like Ballard is driving a change in the investor base across the hydrogen & fuel cell sector. We also dive into the future for Ballard where the challenges and focuses for the business lie while the team reflect on what has been a very intense year for the show and the hydrogen industry. All this and more!
The podcast can be found on their website
The podcast can be found on their website
Everything About Hydrogen Podcast: Scaling Clean Hydrogen Production
Dec 2021
Publication
Today we are joined by our good friends from Enapter. The company is a leader in the clean hydrogen sector focused on AEM electrolyzer technology and innovative software solutions that make it possible to rapidly deploy and scale hydrogen production assets. For those who follow the hydrogen sector regularly it’s been hard not to hear Enapter-related news in 2021 and its impressive trajectory as they have gone public announced the plans for a brand new production facility in Germany (on which they have now begun construction) and most recently the announcement that Enapter was selected as the winner of the prestigious Earthshot prize. To do that we are absolutely delighted to have with us all the way from his home base in Thailand Thomas Chrometzka Chief Strategy Officer at Enapter and one of the people that we enjoy having on the show so much that we have brought him back again to fill us in on what he and Enapter are up to and what they have planned for the future of hydrogen.
The podcast can be found on their website
The podcast can be found on their website
A Flammability Limit Model for Hydrogen-air-diluent Mixtures Based on Heat Transfer Characteristics in Flame Propagation
May 2019
Publication
Predicting lower flammability limits (LFL) of hydrogen has become an ever-important task for safety of nuclear industry. While numerous experimental studies have been conducted LFL results applicable for the harsh environment are still lack of information. Our aim is to develop a calculated non-adiabatic flame temperature (CNAFT) model to better predict LFL of hydrogen mixtures in nuclear power plant. The developed model is unique for incorporating radiative heat loss during flame propagation using the CNAFT coefficient derived through previous studies of flame propagation. Our new model is more consistent with the experimental results for various mixtures compared to the previous model which relied on calculated adiabatic flame temperature (CAFT) to predict the LFL without any consideration of heat loss. Limitation of the previous model could be explained clearly based on the CNAFT coefficient magnitude. The prediction accuracy for hydrogen mixtures at elevated initial temperatures and high helium content was improved substantially. The model reliability was confirmed for H2-air mixtures up to 300 C and H2-air-He mixtures up to 50 vol % helium concentration. Therefore the CNAFT model developed based on radiation heat loss is expected as the practical method for predicting LFL in hydrogen risk analysis.
Modelling a Highly Decarbonised North Sea Energy System in 2050: a Multinational Approach
Dec 2021
Publication
The North Sea region located in the Northwest of Europe is expected to be a frontrunner in the European energy transition. This paper aims to analyse different optimal system configurations in order to meet net-zero emission targets in 2050. Overall the paper presents two main contributions: first we develop and introduce the IESA-NS model. The IESA-NS model is an optimization integrated energy system model written as a linear problem. The IESA-NS model optimizes the long-term investment planning and short-term operation of seven North Sea region countries (Belgium Denmark Germany the Netherlands Norway Sweden and the United Kingdom). The model can optimize multiple years simultaneously accounts for all the national GHG emissions and includes a thorough representation of all the sectors of the energy system. Second we run several decarbonisation scenarios with net-zero emission targets in 2050. Relevant parameters varied to produce the scenarios include biomass availability VRE potentials low social acceptance of onshore VRE ban of CCUS or mitigation targets in international transport and industry feedstock. Results show a large use of hydrogen when international transport emissions are considered in the targets (5.6 EJ to 7.3 EJ). Electrolysis is the preferred pathway for hydrogen production (up to 6.4 EJ) far ahead of natural gas reforming (up to 2.2 EJ). Allowing offshore interconnectors (e.g. meshed offshore grid between the Netherlands Germany and the United Kingdom) permits to integrate larger amounts of offshore wind (122 GW to 191 GW of additional capacity compared to reference scenarios) while substantially increasing the cross-border interconnection capacities (up to 120 GW). All the biomass available is used in the scenarios across multiple end uses including biofuel production (up to 3.5 EJ) high temperature heat (up to 2.5 EJ) feedstock for industry (up to 2 EJ) residential heat (up to 600 PJ) and power generation (up to 900 PJ). In general most of the results justify the development of multinational energy system models in which the spatial coverage lays between national and continental models.
Everything About Hydrogen Podcast: Envisioning the Hydrogen Revolution
May 2021
Publication
For our 40th episode of the Everything About Hydrogen podcast the gang are joined by hydrogen luminary Marco Alverà the CEO of Snam. Founded in 1941 and listed on the Italian stock exchange since 2001 Snam is a leader in the European gas market and operator of over 41000km of transport networks. Hailed as a visionary who has led the pivot of the world’s 2nd largest gas distribution company towards a clean gas trajectory Marco is widely recognized as a thought leader and a key figure driving the transition towards hydrogen. On the show the team discuss why Marco decided to lead Snam's pivot towards hydrogen what he sees as the role of hydrogen in the energy transition and how blue hydrogen can sit alongside green hydrogen as part of the solution to a decarbonized gas network.
The podcast can be found on their website
The podcast can be found on their website
Numerical Investigation of Dual Fuel Combustion on a Compression Ignition Engine Fueled with Hydrogen/Natural Gas Blends
Mar 2022
Publication
The present work aims to assess the influence of the composition of blends of hydrogen (H2 ) and Natural Gas (NG) on Dual Fuel (DF) combustion characteristics including gaseous emissions. The 3D-CFD study is carried out by means of a customized version of the KIVA-3V code. An automotive 2.8 L 4-cylinder turbocharged diesel engine was previously modified in order to operate in DF NG–diesel mode and tested at the dynamometer bench. After validation against experimental results the numerical model is applied to perform a set of combustion simulations at 3000 rpm–BMEP = 8 bar in DF H2/NG-diesel mode. Different H2–NG blends are considered: as the H2 mole fraction varies from 0 vol% to 50 vol% the fuel energy within the premixed charge is kept constant. The influence of the diesel Start Of Injection (SOI) is also investigated. Simulation results demonstrate that H2 enrichment accelerates the combustion process and promotes its completion strongly decreasing UHC and CO emissions. Evidently CO2 specific emissions are also reduced (up to about 20% at 50 vol% of H2 ). The main drawbacks of the faster combustion include an increase of in-cylinder peak pressure and pressure rate rise and of NOx emissions. However the study demonstrates that the optimization of diesel SOI can eliminate all aforementioned shortcomings.
Everything About Hydrogen Podcast: What's Brewing in the UK Clean Hydrogen Sector?
Dec 2021
Publication
Chris Jackson is the Founder and CEO of Protium Green Solutions based in London. Protium is a hydrogen energy services company that designs develops finances owns and operates clean hydrogen solutions for clients to achieve net zero energy emissions at their industrial/manufacturing sites. Chris will talk to us about the Protium story and also give us some insight into a major project that Protium recently announced in conjunction Budweiser Brewing Group UK&Ireland to explore the deployment of zero emission green hydrogen at Magor brewery in South Wales one of the largest breweries in the UK. To that end in order to get the full story about this project we are delighted to say that we have yet another great guest on this episode. Tom Brewer who leads Global Environmental Sustainability efforts at AB InBev the parent company of Budweiser Brewing Group will join us for the final segment of the show to talk about how hydrogen fits into AB InBev’s vision of a sustainable future for the company.
The podcast can be found on their website
The podcast can be found on their website
A Chicken and Egg Situation: Enhancing Emergency Service Workers' Knowledge of Hydrogen
Sep 2021
Publication
This paper reports on the results of interviews conducted with 21 representatives from emergency services organisations within Australia and New Zealand. With a relative emergent industry such as future fuels a chicken and egg situation does emerge with regards to how much training needs to be in place in advance of large-scale industry development or not. These respondents were employed in a variety of roles being directly involved in research and training of emerging technologies frontline operational managers and other senior roles across the emergency services sector. Participants' responses to a series of questions were able to provide insights into the state of knowledge and training requirements within their organisations in relation to hydrogen and other future fuels. The findings suggest that formal and informal processes currently exist to support the knowledge development and transferal around the adoption of hydrogen and other future fuels. From the interviews it became clear that there are a number of processes that have emerged from the experiences gained through the implementation of rooftop solar PV and battery storage that provide some background context for advancing future fuels information across the sector. Because safety is a critical component for securing a social licence to operate engagement and knowledge sharing with any representatives from across this sector will only help to build confidence in the industry. Similarly because interviewees were very keen to access information they expressed a clear willingness to learn more through more formalised relationships rather than an ad hoc information seeking that has been employed to date. The presentation will identify key recommendations and also highlight the importance of QR Codes in the emergency responder landscape. Implications for industry and policy makers are discussed.
IGEM/TD/1 Edition 6 Supplement 2 - High Pressure Hydrogen Pipelines
Nov 2021
Publication
This Supplement gives additional requirements and qualifications for the transmission of Hydrogen including Natural Gas/Hydrogen blended mixtures (subsequently referred to as NG/H blends) and for the repurposing of Natural Gas (NG) pipelines to Hydrogen service. For the purposes of this document any NG/H blend above 10% MOL is considered to be an equivalence to 100% hydrogen. For blends below 10% MOL there is no evidence to confirm that blends containing up to 10 mol.% hydrogen do not cause material degradation but it is considered that the risk is low.
This Supplement covers the design construction inspection testing operation and maintenance of steel pipelines and certain associated installations in Hydrogen service and the repurposing of NG pipelines to Hydrogen service at maximum operating pressure (MOP) exceeding 7 bar and not exceeding 137.9 bar.
This standard can be purchased here
This Supplement covers the design construction inspection testing operation and maintenance of steel pipelines and certain associated installations in Hydrogen service and the repurposing of NG pipelines to Hydrogen service at maximum operating pressure (MOP) exceeding 7 bar and not exceeding 137.9 bar.
This standard can be purchased here
Integration Design and Operation Strategy of Multi-Energy Hybrid System Including Renewable Energies, Batteries and Hydrogen
Oct 2020
Publication
In some areas the problem of wind and solar power curtailment is prominent. Hydrogen energy has the advantage of high storage density and a long storage time. Multi-energy hybrid systems including renewable energies batteries and hydrogen are designed to solve this problem. In order to reduce the power loss of the converter an AC-DC hybrid bus is proposed. A multi-energy experiment platform is established including a wind turbine photovoltaic panels a battery an electrolyzer a hydrogen storage tank a fuel cell and a load. The working characteristics of each subsystem are tested and analyzed. The multi-energy operation strategy is based on state monitoring and designed to enhance hydrogen utilization energy efficiency and reliability of the system. The hydrogen production is guaranteed preferentially and the load is reliably supplied. The system states are monitored such as the state of charge (SOC) and the hydrogen storage level. The rated and ramp powers of the battery and fuel cell and the pressure limit of the hydrogen storage tank are set as safety constraints. Eight different operation scenarios comprehensively evaluate the system’s performance and via physical experiments the proposed operation strategy of the multi-energy system is verified as effective and stable.
Techno-Economic Assessment of Natural Gas Pyrolysis in Molten Salts
Jan 2022
Publication
Steam methane reforming with CO2 capture (blue hydrogen) and water electrolysis based on renewable electricity (green hydrogen) are commonly assumed to be the main supply options in a future hydrogen economy. However another promising method is emerging in the form of natural gas pyrolysis (turquoise hydrogen) with pure carbon as a valuable by-product. To better understand the potential of turquoise hydrogen this study presents a techno-economic assessment of a molten salt pyrolysis process. Results show that moderate reactor pressures around 12 bar are optimal and that reactor size must be limited by accepting reactor performance well below the thermodynamic equilibrium. Despite this challenge stemming from slow reaction rates the simplicity of the molten salt pyrolysis process delivers high efficiencies and promising economics. In the long-term carbon could be produced for 200–300 €/ton granting access to high-volume markets in the metallurgical and chemical process industries. Such a scenario makes turquoise hydrogen a promising alternative to blue hydrogen in regions with public resistance to CO2 transport and storage. In the medium-term expensive first-of-a-kind plants could produce carbon around 400 €/ton if hydrogen prices are set by conventional blue hydrogen production. Pure carbon at this cost level can access smaller high-value markets such as carbon anodes and graphite ensuring profitable operation even for first movers. In conclusion the economic potential of molten salt pyrolysis is high and further demonstration and scale-up efforts are strongly recommended.
Power-to-hydrogen as Seasonal Energy Storage: An Uncertainty Analysis for Optimal Design of Low-carbon Multi-energy Systems
Jun 2020
Publication
This study analyzes the factors leading to the deployment of Power-to-Hydrogen (PtH2) within the optimal design of district-scale Multi-Energy Systems (MES). To this end we utilize an optimization framework based on a mixed integer linear program that selects sizes and operates technologies in the MES to satisfy electric and thermal demands while minimizing annual costs and CO2 emissions. We conduct a comprehensive uncertainty analysis that encompasses the entire set of technology (e.g. cost efficiency lifetime) and context (e.g. economic policy grid carbon footprint) input parameters as well as various climate-referenced districts (e.g. environmental data and energy demands) at a European-scope.
Minimum-emissions MES with large amounts of renewable energy generation and high ratios of seasonal thermal-to-electrical demand optimally achieve zero operational CO2 emissions by utilizing PtH2 seasonally to offset the long-term mismatch between renewable generation and energy demand. PtH2 is only used to abate the last 5–10% emissions and it is installed along with a large battery capacity to maximize renewable self-consumption and completely electrify thermal demand with heat pumps and fuel cells. However this incurs additional cost. Additionally we show that ‘traditional’ MES comprised of renewables and short-term energy storage are able to decrease emissions by 90% with manageable cost increases.
The impact of uncertainty on the optimal system design reveals that the most influential parameter for PtH2 implementation is (1) heat pump efficiency as it is the main competitor in providing renewable-powered heat in winter. Further battery (2) capital cost and (3) lifetime prove to be significant as the competing electrical energy storage technology. In the face of policy uncertainties a CO2 tax shows large potential to reduce emissions in district MES without cost implications. The results illustrate the importance of capturing the dynamics and uncertainties of short- and long-term energy storage technologies for assessing cost and CO2 emissions in optimal MES designs over districts with different geographical scopes.
Minimum-emissions MES with large amounts of renewable energy generation and high ratios of seasonal thermal-to-electrical demand optimally achieve zero operational CO2 emissions by utilizing PtH2 seasonally to offset the long-term mismatch between renewable generation and energy demand. PtH2 is only used to abate the last 5–10% emissions and it is installed along with a large battery capacity to maximize renewable self-consumption and completely electrify thermal demand with heat pumps and fuel cells. However this incurs additional cost. Additionally we show that ‘traditional’ MES comprised of renewables and short-term energy storage are able to decrease emissions by 90% with manageable cost increases.
The impact of uncertainty on the optimal system design reveals that the most influential parameter for PtH2 implementation is (1) heat pump efficiency as it is the main competitor in providing renewable-powered heat in winter. Further battery (2) capital cost and (3) lifetime prove to be significant as the competing electrical energy storage technology. In the face of policy uncertainties a CO2 tax shows large potential to reduce emissions in district MES without cost implications. The results illustrate the importance of capturing the dynamics and uncertainties of short- and long-term energy storage technologies for assessing cost and CO2 emissions in optimal MES designs over districts with different geographical scopes.
Beyond Traditional Energy Sector Coupling: Conserving and Efficient Use of Local Resources
Jun 2022
Publication
Decentralisation and sector coupling are becoming increasingly crucial for the decarbonisation of the energy system. Resources such as waste and water have high energy recovery potential and are required as inputs for various conversion technologies; however waste and water have not yet been considered in sector coupling approaches but only in separate examinations. In this work an open-source sector coupling optimisation model considering all of these resources and their utilisation is developed and applied in a test-bed in an Israeli city. Our investigations include an impact assessment of energy recovery and resource utilisation in the transition to a hydrogen economy with regard to the inclusion of greywater and consideration of emissions. Additionally sensitivity analyses are performed in order to assess the complexity level of energy recovery. The results demonstrate that waste and water energy recovery can provide high contributions to energy generation. Furthermore greywater use can be vital to cover the water demands in scarcity periods thus saving potable water and enabling the use of technology. Regarding the transition to hydrogen technologies resource energy recovery and management have an even higher effect than in the original setup. However without appropriate resource management a reduction in emissions cannot be achieved. Furthermore the sensitivity analyses indicate the existence of complex relationships between energy recovery technologies and other energy system operations.
Global Gas Report 2022
May 2022
Publication
This edition of the Global Gas Report covers two very turbulent years in the global gas industry and the wider global energy markets. The Covid-19 pandemic lockdowns with a brief period of excess supply and low prices gave way to tight energy markets extreme price volatility and a compounding geopolitical challenge to energy security. At the time of writing the ongoing Russia-Ukraine conflict has been affecting the flows of gas and has put Europe on a quest to diversify its energy and gas supply that is now opening a new paradigm in the energy industry. This report comes at a time when the situation for global commodity and gas markets is in a state of rapid change and the strategic path forwards for the gas industry and energy policy-makers is continually developing. One thing is clear this is a critical and decisive moment for the gas industry. How it navigates the way through this crisis and charts a path forward will shape its long-term success and the role that it will play in the energy transition and beyond. This is the moment for the gas industry to demonstrate that gas can deliver a sustainable and secure energy future for all and that natural gas and a portfolio of decarbonized low- and zero-carbon gases are key to an achievable energy transition. This year’s report assesses key gas market trends from 2020 and 2021 including Covid-19 outcomes tightness of supply price volatility investments and the upward reversal in the global emissions trend. It then turns to the main topic on the global energy agenda – security – and considers key variables impacting it from industry and policy perspectives as well as considering possible paths to reinforce it. Finally the report looks at the main decarbonization pathways for gas supply as they progressively develop to make gas itself a low or zero-carbon fuel for the future. This report seeks to deliver insights about the global gas sector and to inform its stakeholders partners and importantly global decision-makers about the state of play today and possibilities for the future. It concludes with key insights on how sustainability security and competitiveness can help to deliver a sustainable future in line with the goals of the Paris Agreement and the UN Sustainable Development Agenda.
Condensed Phase Explosions Involving Liquid Hydrogen
Sep 2021
Publication
Liquid hydrogen may have an important role in the storage and transportation of hydrogen energy. It may also provide the best option for some users of hydrogen energy notably the aviation sector. In the 1960’s liquid hydrogen spillages in open uncongested conditions sometimes produced violent condensed phase explosions as well as the familiar gas phase flash and sustained pool fire. Testing showed that burning mixtures of LH2 and solid oxygen/nitrogen readily transitioned to detonation for oxygen concentrations in the solid phase at or above 50%. Such explosive events have been observed in more recent research work on LH2 spillage and the pressure effects could be significant in some accident scenarios. There is a need to understand how solids are produced following spillage and what factors determine the level of oxygen enrichment. This paper describes the physical processes involved in the accumulation of solids during a horizontal discharge at ground level based on observations made in a recent HSE test that led to a condensed phase explosion. Areas where solids accumulated but remained in intimate contact with LH2 are identified. The paper also includes a thermodynamic and fluid mechanical analysis of the condensation process that includes the calculation of densities of mixtures of LH2 and air in different proportions. When the difference in flow speed between air and underlying LH2 is low a stable condensation layer can develop above the liquid where the temperature is just under the initial condensation point of air allowing sustained oxygen enrichment of condensate.
Everything About Hydrogen Podcast: Commercial Trucking at the Speed of Hydrogen
Jun 2021
Publication
The transportation and mobility sector is vast complex unwieldy and most excitingly an obvious area of focus for hydrogen fuel cell technology applications. Hydrogen FCEVs allow vehicles to run in a wide range of environments with zero tailpipe emissions and can do so without the need for extremely heavy battery cells and can be refueled in the same amount of time as a modern ICE vehicle. This makes hydrogen FCEVs an ideal fit for the heavy commercial transportation industry and is why Hyzon Motors has jumped at the opportunity to revolutionize the industry. The company has grabbed headlines all over the world with its ambitious plans for rolling out its trucks in the United States and other major markets. It has also made news with its recent announcement that the company is going public and has attracted significant investor interest. The EAH team is joined on this episode by Hyzon's CEO Craig Knight to talk about how the company is tackling some of the most significant challenges in decarbonizing transport and how it can make trucking a zero-emission operation.
The podcast can be found on their website
The podcast can be found on their website
Green Hydrogen Production for Oil Refining - Finnish Case
Jan 2023
Publication
This study investigates the production of green hydrogen for use in oil refining as specified in the draft of European union delegated act published in May 2022. The European union plans to set strict requirements of additionality and reporting regarding the criteria of renewable electricity used in hydrogen production. Alkaline electrolyzer proton exchange membrane electrolyzer and solid oxide electrolyzer are evaluated in various scenarios supplied by wind power: power purchase agreement-based scenarios and wind power investment-based scenarios. In power purchase agreement-based scenarios baseload and pay as produced power purchase agreements (with and without electricity storage) are assessed. According to results the use of 600 MW compressed air energy storage could reduce the dependency on the grid by 7% but increase the cost of green hydrogen significantly. Investment-based scenarios produce green hydrogen with a lower operation cost but higher break-even price compared to power purchase agreement-based scenarios. The cheapest green hydrogen can be achieved by alkaline electrolyzer with baseload power purchase agreement. Direct ownership of wind power is outside the operation of oil refining industry thus power purchase agreements contracting is more likely to realize.
Review of the Liquid Hydrogen Storage Tank and Insulation System for the High-Power Locomotive
Jun 2022
Publication
Hydrogen has been attracting attention as a fuel in the transportation sector to achieve carbon neutrality. Hydrogen storage in liquid form is preferred in locomotives ships drones and aircraft because these require high power but have limited space. However liquid hydrogen must be in a cryogenic state wherein thermal insulation is a core problem. Inner materials including glass bubbles multi-layer insulation (MLI) high vacuum and vapor-cooled shields are used for thermal insulation. An analytic study is preferred and proceeds liquid hydrogen tanks due to safety regulations in each country. This study reviewed the relevant literature for thermodynamic modeling. The literature was divided into static dynamic and systematic studies. In summary the authors summarized the following future research needs: The optimal design of the structure including suspension baffle and insulation system can be studied to minimize the boil-off gas (BOG). A dynamic study of the pressure mass flow and vaporizer can be completed. The change of the components arrangement from the conventional diesel–electric locomotive is necessary.
State-of-the-art Expansion Planning of Integrated Power, Natural Gas, and Hydrogen Systems
Apr 2022
Publication
Renewable hydrogen is considered key in the transition towards a carbon-neutral future. This is due to its spatio-temporal storage and sector coupling potential which has seen it referred to as energy vector. However many unresolved issues remain regarding hydrogen's large-scale deployment e.g. least-cost production optimal facility siting and overall implications on power and energy systems. Expansion planning provides an option to study these issues in the holistic context of energy systems. To this end this article presents a comprehensive review on state-of-the-art expansion planning models that consider integrated power natural gas and hydrogen systems. We cluster the existing literature in terms of modelling themes and scope study the applied systematic modelling characteristics and conduct an in-depth analysis of the technical model features regarding hydrogen technologies and natural gas infrastructure. Finally we identify and discuss research gaps in the existing literature.
Everything About Hydrogen Podcast: Greening the Maritime Transport Sector
Nov 2021
Publication
We have been talking about the difficulties of decarbonizing the maritime sector since the beginning of the Everything About Hydrogen podcast. For this episode we finally bring on the experts who are looking to make the changes in maritime and marine operations a reality for a zero-carbon shipping future. The EAH Team sits down with Tomas Tronstad Head of Shipping and Technology for the New Energy Division at Wilhelmsen Group. Founded in Norway in 1861 Wilhelmsen is now a comprehensive global maritime group providing essential products and services to the merchant fleet along with supplying crew and technical management to the largest and most complex vessels ever to sail. Committed to shaping the maritime industry the company also seeks to develop new opportunities and collaborations in renewables zero-emission shipping and marine digitalization. Tomas is helping Wilhelmsen achieve its decarbonization ambitions and we are delighted to share our conversation with him with our listerners!
The podcast can be found on their website
The podcast can be found on their website
Hydrogen-assisted Fatigue Crack Growth: Pre-charging vs In-situ Testing in Gaseous Environments
Mar 2023
Publication
We investigate the implications of conducting hydrogen-assisted fatigue crack growth experiments in a hydrogen gas environment (in-situ hydrogen charging) or in air (following exposure to hydrogen gas). The study is conducted on welded 42CrMo4 steel a primary candidate for the future hydrogen transport infrastructure allowing us to additionally gain insight into the differences in behavior between the base steel and the coarse grain heat affected zone. The results reveal significant differences between the two testing approaches and the two weld regions. The differences are particularly remarkable for the comparison of testing methodologies with fatigue crack growth rates being more than one order of magnitude higher over relevant loading regimes when the samples are tested in a hydrogen-containing environment relative to the pre-charged samples. Aided by finite element modelling and microscopy analysis these differences are discussed and rationalized. Independent of the testing approach the heat affected zone showed a higher susceptibility to hydrogen embrittlement. Similar microstructural behavior is observed for both testing approaches with the base metal exhibiting martensite lath decohesion while the heat affected zone experienced both martensite lath decohesion and intergranular fracture.
Total Cost of Ownership and Its Potential Consequences for the Development of the Hydrogen Fuel Cell Powered Vehicle Market in Poland
Apr 2021
Publication
Electromobility is a growing technology for land transport constituting an important element of the concept of sustainable economic development. The article presents selected research results concerning one of the segments of this market-vehicles powered by hydrogen fuel cells. The subject of the research was to gain extensive knowledge on the economic factors influencing the future purchasing decisions of the demand side in relation to this category of vehicles. The research was based on a numerical experiment. For this purpose a comparative analysis of purchase prices in relation to the TCO of the vehicle after 3–5 years of use was performed. The research included selected models that are powered by both conventional and alternative fuels. The use of this method will allow to assess the real costs associated with the hydrogen vehicle. The authors emphasize the important role of economic factors in the form of the TCO index for the development of this market. The experimental approach may be helpful in understanding the essence of economic relations that affect the development of the electro-mobility market and the market demand for hydrogen fuel cell-powered vehicles in Poland.
Everything About Hydrogen Podcast: Hydrogen News Roundup and Hydrogen Q&A
Jun 2020
Publication
This week on the show the team take a pause to review the current state of hydrogen and fuel cell affairs globally whilst taking time to go over all the excellent questions that our listeners have kindly shared with us over the last few months. We cover carbon capture the green new deal synthetic fuels hydrogenspiders green hydrogen in Australia and many more themes this week so don’t miss this episode!
The podcast can be found on their website
The podcast can be found on their website
Everything About Hydrogen Podcast: Back to a Hydrogen Future?
Mar 2020
Publication
On this weeks episode the team are talking all things hydrogen with Mark Neller Director at Arup. On the show we discuss the UK’s Hydrogen4Heat program where Arup has been leading the UK government’s work on the safety and practical considerations that are necessary to examine whether hydrogen could be a serious solutions for decarbonising UK residential commercial and industry heat. We also discuss the Nikola Badger the need for system wide planning when considering decarbonisation pathways for heat. All this and more on the show!
The podcast can be found on their website
The podcast can be found on their website
Role of Grain Boundaries in Hydrogen Embrittlement of Alloy 725: Single and Bi-crystal Microcantilever Bending Study
Jan 2022
Publication
In situ electrochemical microcantilever bending tests were conducted in this study to investigate the role of grain boundaries (GBs) in hydrogen embrittlement (HE) of Alloy 725. Specimens were prepared under three different heat treatment conditions and denoted as solution-annealed (SA) aged (AG) and over-aged (OA) samples. For single-crystal beams in an H-containing environment all three heat-treated samples exhibited crack formation and propagation; however crack propagation was more severe in the OA sample. The anodic extraction of H presented similar results as those under the H-free condition indicating the reversibility of the H effect under the tested conditions. Bi-crystal micro-cantilevers bent under H-free and H-charged conditions revealed the significant role of the GB in the HE of the beams. The results indicated that the GB in the SA sample facilitated dislocation dissipation whereas for the OA sample it caused the retardation of crack propagation. For the AG sample testing in an H-containing environment led to the formation of a sharp severe crack along the GB path.
Design and Analysis of a New Renewable-Nuclear Hybrid Energy System for Production of Hydrogen, Fresh Water and Power
Nov 2021
Publication
This paper investigates an integrated system where solar energy system (with 75MWp bifacial PV arrays) and nuclear power plant (with 2×10MWt HTR-10 type pebble bed reactors) are hybridized and integrated with a 72MWe capacity high-temperature solid oxide electrolysis (SOE) unit to produce hydrogen fresh water and electrical power. Bifacial PV plant is integrated to system for supplying electricity with a low LCOE and zero-carbon system. A Rankine cycle is integrated to generate power from the steam that generated from nuclear heat. According to the available irradiance; the steam is diverted between steam turbine and high-temperature electrolyzer for hydrogen and power generation. Multi-effect desalination unit is integrated to exploit the excess heat to generate fresh water. A system performance assessment is carried out by energy and exergy efficiencies thermodynamically. The bifacial PV plant is analyzed in six selected latitudes in order to assess the feasibility and applicability of the system. Numerous time-dependent analyses are carried out to study the effects of varying inputs such as solar radiation intensity. For 20MWt nuclear 75MWp solar capacity; hydrogen productions are found to be between 0.036 and 0.562kg/s. Among the Northern Hemisphere latitudes the peak daily hydrogen production rate is expected to reach 25.9 tons of hydrogen per day for the 75 °N case mostly with the influence of low temperature and high albedo. The pitch distance change is increased the hydrogen production rate by 28% between 3 m and 7 m tracker spacing. The overall system energy efficiency is obtained between 21.8% and 24.2% where the overall system exergy efficiency is found between 18.6% and 21.1% under dynamic conditions for the 45°N latitude case.
HyDeploy: Demonstrating Non-destructive Carbon Savings Through Hydrogen Blending
Aug 2021
Publication
The project has successfully developed the safety case and delivered a hydrogen blend via the gas network into customers’ homes. The demonstration of safety for the specific network was based on robust evidence and clear operational procedures. Alongside the enabling safety case the HyDeploy project has demonstrated the first steps of hydrogen deployment are safe technically feasible and non-disruptive both for the network and domestic users.
The key outcomes of the HyDeploy project were:
The key outcomes of the HyDeploy project were:
- Successful achievement of the first regulatory approval from the HSE to operate a live gas network above the current hydrogen limit of 0.1 vol%. The approval allowed blending up to 20 vol%.
- Development of the technical and procedural precedents to generate evidence for review by the HSE which have informed subsequent safety case submissions through HyDeploy2 and the wider hydrogen safety case industry.
- The design fabrication installation and operation of the UK’s first hydrogen grid entry unit.
- Integration of novel hydrogen production and blending technologies to create the first hydrogen delivery system based on electrolytic generation into a live gas grid.
- Safe delivery of the UK’s first hydrogen blend trial to 100 homes and 30 faculty buildings. The trial delivered over 42000 cubic metres of hydrogen and abated over 27 tonnes of CO2.
- Collaboration with appliance and equipment providers to build a robust evidence base to demonstrate equipment suitability.
- Evidencing the suitability of hydrogen blends with domestic appliances as well as larger commercial appliances including catering equipment and boilers up to 600 kW.
- Evidencing the suitability of hydrogen blends with medium and low-pressure distribution systems relating to key performance metrics such as: pressure control; odour intensity and uniform gas compositions.
- Promotion of supply chain innovation through facilitating trials to develop gas detection and analysis technologies.
- Establishing a robust social science evidence base to understand the attitudes and experience of consumers actually using hydrogen blends.
Everything About Hydrogen Podcast: Hydrogen from Waste
Mar 2021
Publication
On this episode of EAH the team is joined by Tim Yeo Chairman of Powerhouse Energy to talk about the work they are doing in the waste-to-energy space and how they see the sector evolving in the coming years.
The podcast can be found on their website
The podcast can be found on their website
Green Hydrogen Production Via Electrochemical Conversion of Components from Alkaline Carbohydrate Degradation
Nov 2021
Publication
Water electrolysis is a promising approach for the sustainable production of hydrogen however the unfavorable thermodynamics and sluggish kinetics of oxygen evolution reaction (OER) are associated with high anodic potentials. To lower the required potentials an effective strategy is proposed to substitute OER with partial oxidation of degradation products of carbohydrate origin from the waste stream of a chemical pulping industry. In this work two different catalytic materials e PdNi and NiO are investigated comparatively to understand their catalytic performance for the oxidation of carbohydrate alkaline degradation products (CHADs). PdNi can catalyze CHADs with low potential requirements (0.11 V vs. Hg/HgO at 150 mA cm2 ) but is limited to current densities opportunities to study earth-abundant electrocatalysts to efficiently oxidize biomass-derived substances.
HydroGenerally - Episode 2: Where Should Hydrogen Be Used?
Apr 2022
Publication
The Innovate UK KTN Hydrogen Innovation Network is bringing you this second episode with Steffan Eldred and Simon Buckley from Innovate UK KTN who continue their ‘back to basics' approach and delve deeper to understand where hydrogen should be used with their special guest Joanna Richart Head of Hydrogen Business at Ricardo. As with any technology or fuel discussions can get carried away implying they are the solution to all things but at Innovate UK KTN we strongly believe that we should ensure hydrogen is used where it can be most effective for decarbonising energy industrial and chemical industries.
The podcast can be found on their website
The podcast can be found on their website
Modeling the Effects of Implementation of Alternative Ways of Vehicle Powering
Nov 2021
Publication
The trend to replace traditional fossil fuel vehicles is becoming increasingly apparent. The replacement concerns the use of pure biofuels or in blends with traditional fuels the use of hydrogen as an alternative fuel and above all the introduction of electric propulsion. The introduction of new types of vehicle propulsion affects the demand for specific fuels the needs for new infrastructure or the nature of the emissions to the environment generated by fuel production and vehicle operation. The article presents a mathematical model using the difference of two logistic functions the first of which describes the development of the production of a specific type of vehicle and the second the withdrawal of this type of vehicle from traffic after its use. The model makes it possible to forecast both the number of vehicles of each generation as a function of time as well as changes in energy demand from various sources and changes in exhaust emissions. The results of the numerical simulation show replacing classic vehicles with alternative vehicles increases the total energy demand if the generation of the next generation occurs earlier than the decay of the previous generation of vehicles and may decrease in the case of overlapping or delays in the creation of new vehicles compared to the course of the decay function of the previous generation. For electric vehicles carbon dioxide emissions are largely dependent on the emissions from electricity generation. The proposed model can be used to forecast technology development variants as well as analyze the current situation based on the approximation of real data from Vehicle Registration Offices.
Development of Analysis Program for Direct Containment Heating
Feb 2022
Publication
Direct containment heating (DCH) is one of the potential factors leading to early containment failure. DCH is closely related to safety analysis and containment performance evaluation of nuclear power plants. In this study a DCH prediction program was developed to analyze the DCH loads of containment vessel. The phenomenological model of debris dispersal metal oxidation reaction debris-atmospheric heat transfer and hydrogen jet burn was established. Code assessment was performed by comparing with several separate effect tests and integral effect tests. The comparison between the predicted results and experimental data shows that the program can predict the key parameters such as peak pressure temperature and hydrogen production in containment well and for most comparisons the relative errors can be maintained within 20%. Among them the prediction uncertainty of hydrogen production is slightly larger. The analysis shows that the main sources of the error are the difference of time scale and the oxidation of cavity debris.
Everything About Hydrogen Podcast: Masters of Scale: The World of SOFC & SOE Technologies
Oct 2020
Publication
On this week's episode the EAH team catches up with Mark Selby Chief Technology Officer at Ceres Power to dive into the world of solid oxide fuel cell (SOFC) and solid oxide electrolyzer (SOE) technologies. Ceres Power specializes in the design of SOFCs for applications in a diverse range of energy intensive sectors. Mark takes the time in this episode to walk the team through the details advantages and challenges of deploying SOFCs and low-carbon hydrogen solutions more broadly and discusses how consumer and customer awareness of these technologies varies widely across international markets. We cover a lot of ground this week so be sure not to miss out on our conversation with Mark!
The podcast can be found on their website
The podcast can be found on their website
Evaluation of Selectivity and Resistance to Poisons of Commercial Hydrogen Sensors
Sep 2013
Publication
The development of reliable hydrogen sensors is crucial for the safe use of hydrogen. One of the main concerns of end-users is sensor reliability in the presence of species other than the target gas which can lead to false alarms or undetected harmful situations. In order to assess the selectivity of commercial of the shelf (COTS) hydrogen sensors a number of sensors of different technology types were exposed to various interferent gas species. Cross-sensitivity tests were performed in accordance to the recommendations of ISO 26142:2010 using the hydrogen sensor testing facilities of NREL and JRC-IET. The results and conclusions arising from this study are presented.
Scenario-Based Comparative Analysis for Coupling Electricity and Hydrogen Storage in Clean Oilfield Energy Supply System
Mar 2022
Publication
In response to the objective of fully attaining carbon neutrality by 2060 people from all walks of life are pursuing low-carbon transformation. Due to the high water cut in the middle and late phases of development the oilfield’s energy consumption will be quite high and the rise in energy consumption will lead to an increase in carbon emission at the same time. As a result the traditional energy model is incapable of meeting the energy consumption requirement of high water cut oilfields in their middle and later phases of development. The present wind hydrogen coupling energy system was researched and coupled with the classic dispersed oilfield energy system to produce energy for the oilfields in this study. This study compares four future energy system models to existing ones computes the energy cost and net present value of an oilfield in Northwest China and proposes a set of economic evaluation tools for oilfield energy systems. The study’s findings indicate that scenario four provides the most economic and environmental benefits. This scenario effectively addresses the issue of high energy consumption associated with aging oilfields at this point significantly reduces carbon emissions absorbs renewable energy locally and reduces the burden on the power grid system. Finally sensitivity analysis is utilized to determine the effect of wind speed electricity cost and oilfield gas output on the system’s economic performance. The results indicate that the system developed in this study can be applied to other oilfields.
Everything About Hydrogen Podcast: Giga-watt it Takes to Scale Green Hydrogen (and Ammonia)
Feb 2021
Publication
How do we get green hydrogen (and green ammonia) production to scale and make it cost competitive? It's a great question and we ask it all the time on the show. Well Alicia Eastman Co-founder & Managing Director of InterContinental Energy (ICE) may be one of the best authorities in the world on this topic and she joins us on this episode of EAH to tell the team all about her and ICE's work developing the Asian Renewable Energy Hub (AREH). Located in Western Australia the AREH when completed will be the largest renewable energy project by total generation capacity on the planet. At 26 GW it surpasses even the likes of the Three Gorges Dam and will act as a central production and distribution point for huge quantities of clean hydrogen and ammonia for offtakers and customers across APAC and beyond. The AREH is a truly massive project that has global implications for the global energy landscape of the future.
The podcast can be found on their website.
The podcast can be found on their website.
Everything About Hydrogen Podcast: Moving at the Speed of Hydrogen
Nov 2020
Publication
We spend a lot of time on the show talking about the interesting use cases and potential applications of hydrogen technologies as a means to decarbonize high-emissions sectors and that is the point! However moving hydrogen around the world (e.g. to remote areas without the capacity to produce it locally) presents a number of complexities and challenges that are unique to hydrogen itself or for which there are no traditionally established technologies to do so. On this episode the EAH team has a fascinating chat with Dr. Daniel Teichmann CEO and founder of Hydrogenious to learn more about liquid organic hydrogen carriers (LOHCs) and how they can help companies overcome some of the major hurdles that moving hydrogen around the globe presents.
The podcast can be found on their website
The podcast can be found on their website
Hydrogen Production in the Swedish Power Sector: Considering Operational Volatilities and Long-term Uncertainties
Nov 2020
Publication
With more renewables on the Swedish electricity market while decommissioning nuclear power plants electricity supply increasingly fluctuates and electricity prices are more volatile. There is hence a need for securing the electricity supply before energy storage solutions become widespread. Electricity price fluctuations moreover affect operating income of nuclear power plants due to their inherent operational inflexibility. Since the anticipated new applications of hydrogen in fuel cell vehicles and steel production producing hydrogen has become a potential source of income particularly when there is a surplus supply of electricity at low prices. The feasibility of investing in hydrogen production was investigated in a nuclear power plant applying Swedish energy policy as background. The analysis applies a system dynamics approach incorporating the stochastic feature of electricity supply and prices. The study revealed that hydrogen production brings alternative opportunities for large-scale electricity production facilities in Sweden. Factors such as hydrogen price will be influential and require in-depth investigation. This study provides guidelines for power sector policymakers and managers who plan to engage in hydrogen production for industrial applications. Although this study was focused upon nuclear power sources it can be extended to hydrogen production from renewable energy sources such as wind and solar.
A Multi-objective MILP Model for the Design and Operation of Future Integrated Multi-vector Energy Networks Capturing Detailed Spatio-temporal Dependencies
Dec 2017
Publication
A multi-objective optimisation model based on mixed integer linear programming is presented that can simultaneously determine the design and operation of any integrated multi-vector energy networks. It can answer variants of the following questions: What is the most effective way in terms of cost value/profit and/or emissions of designing and operating the integrated multi-vector energy networks that utilise a variety of primary energy sources to deliver different energy services such as heat electricity and mobility given the availability of primary resources and the levels of demands and their distribution across space and time? When to invest in technologies where to locate them; what resources should be used where when and how to convert them to the energy services required; how to transport the resources and manage inventory? Scenarios for Great Britain were examined involving different primary energy sources such as natural gas biomass and wind power in order to satisfy demands for heat electricity and mobility via various energy vectors such as electricity natural gas hydrogen and syngas. Different objectives were considered such as minimising cost maximising profit minimising emissions and maximising renewable energy production subject to the availability of suitable land for biomass and wind turbines as well as the maximum local production and import rates for natural gas. Results suggest that if significant mobility demands are met by hydrogen-powered fuel cell vehicles then hydrogen is the preferred energy vector over natural gas for satisfying heat demands. If natural gas is not used and energy can only be generated from wind power and biomass electricity and syngas are the preferred energy carriers for satisfying electricity and heat demands.
Influence of Air Distribution on Combustion Characteristics of a Micro Gas Turbine Fuelled by Hydrogen-doped Methane
Nov 2021
Publication
Adding hydrogen to the fuel can change the combustion characteristics and greatly improve the pollutants emission for the gas turbine. The numerical method was adopted to study the combustion process in a counter-flow combustor of a 100 kW micro gas turbine using methane doped by hydrogen and various distribution schemes of air flow. The combustion characteristics and pollutant emissions were explored to ascertain the influence of air distribution based on solving the validated models. It was shown that as the amount of premixed air increased in the swirling gas the range of the recirculation region became larger and the range of the high-temperature zone in the combustion chamber gradually enlarged. When the amount of premixed air was 30% the outlet temperature distribution of the combustor was excellent and the average temperature was 1172 K. Moreover the concentration of NOX gradually increased and reached a maximum value of 23.46 ppm (@15% O2) as the premixed air increased in the range of the ratio less than 40%. It was reduced to 0.717 ppm (@15% O2) when the amount of premixed air increased to 50%. These findings may support the running of the micro gas turbine using the hybrid fuel of hydrogen and methane.
Metallurgical and Hydrogen Effects on the Small Punch Tested Mechanical Properties of PH-13-8Mo Stainless Steel
Oct 2018
Publication
PH13-8Mo is a precipitation hardened martensitic stainless steel known for its high strength but also for its high sensitivity to hydrogen embrittlement. Small punch test SPT (also referred to as the ball punch test BPT) is a relatively simple and new technique to assess the mechanical properties of samples under biaxial loading conditions. The current study utilizes the unique loading conditions of SPT to investigate the mechanical behavior and fracture prior to and after the hydrogen charging of PH13-8Mo steel. The mechanical characteristics were investigated at different metallurgical conditions: solution and quenched (SQ); fully-aged (550 °C for 4 h) and over-aged (600 °C for 4 h). Samples were cathodically hydrogen charged in a 1 M H2SO4 solution containing NaAsO2 (0.125 mg/L) at 50 mA/cm2 for different durations of 0.5 h 2 h and 19 h and compared to the as-heat-treated condition. A fractographic examination was performed following the SPT measurements by scanning electron microscopy (SEM). Transmission electron microscopy (TEM) and x-ray diffraction (XRD) analyses were used as complementary characterization tools. It is shown that upon hydrogen charging the SPT fracture mode changes from ductile to completely brittle with a transition of mixed mode cracking also affecting the SPT load-displacement curve.
The Influence of Grain Boundary and Hydrogen on the Indetation of Bi-crystal Nickel
Sep 2021
Publication
Three different types of symmetrical tilt grain boundaries Ȉ3 Ȉ11 and Ȉ27 were constructed to study the dislocation behavior under the indentation on bi-crystal nickel. After hydrogen charging the number of hydrogen atoms in the Ȉ3 sample is the smallest and gradually increases in Ȉ11 and Ȉ27 samples. The force-displacement curve of indentation shows that the deformation resistance of the Ȉ3 sample is significantly higher than that of Ȉ11 and Ȉ27 samples. With the presence of grain boundaries the deformation resistance of Ȉ11 and Ȉ27 samples is significantly improved while the deformation resistance of the Ȉ3 VDPSOH is weakened. The indentation depth during the formation of dislocations in single crystals is significantly greater than that of bi-crystals. Grain boundaries slow down the dislocation propagation speed. Compared with the bi-crystals without hydrogen the presence of hydrogen reduces the deformation resistance and accelerates the dislocation propagation.
Cost-effective Technology Choice in a Decarbonized and Diversified Long-haul Truck Transportation Sector: A U.S. Case Study
Dec 2021
Publication
Achieving net-zero emissions by 2050 will require accelerated efforts that include decarbonizing long-haul truck transportation. In this difficult-to-decarbonize low-margin industry economic transparency on technology options is vital for decision makers seeking to eliminate emissions. Battery electric (BET) and hydrogen fuel cell electric trucks (FCET) can represent emission-free alternatives to diesel-powered trucks (DT). Previous studies focus on cost competitiveness in weight-constrained transportation even though logistics research shows that significant shares of transportation are constrained by volume and analyze cost only for selected technologies hence impeding a differentiated market segmentation of future emission-free trucks. In this study the perspective of a rational investor is taken and it is shown that under current conditions in the U.S. BETs outperform FCETs in various long-haul use cases despite charging times and cargo deficits and will further increase their technological competitiveness to DTs. While future energy and fueling prices are decisive for BET competitiveness the analysis reveals that autonomous driving may change the picture in favor of FCETs.
How Knowledge about or Experience with Hydrogen Fueling Stations Improves Their Public Acceptance
Nov 2019
Publication
Hydrogen which is expected to be a popular type of next-generation energy is drawing attention as a fuel option for the formation of a low-carbon society. Because hydrogen energy is different in nature from existing energy technologies it is necessary to promote sufficient social recognition and acceptability of the technology for its widespread use. In this study we focused on the effect of initiatives to improve awareness of hydrogen energy technology thereby investigating the acceptability of hydrogen energy to those participating in either several hydrogen energy technology introduction events or professional seminars. According to the survey results participants in the technology introduction events tended to have lower levels of hydrogen and hydrogen energy technology knowledge than did participants in the hydrogen-energy-related seminars but confidence in the technology and acceptability of the installation of hydrogen stations near their own residences tended to be higher. It was suggested that knowledge about hydrogen and technology could lead to improved acceptability through improved levels of trust in the technology. On the other hand social benefits such as those for the environment socioeconomics and energy security have little impact on individual levels of acceptance of new technology.
Everything About Hydrogen Podcast: Financing the Hydrogen Revolution
Aug 2020
Publication
On this week's episode of Everything About Hydrogen the team are catching up with Astrid Behaghel the Energy Transition expert on hydrogen for BNP Paribas. On the show the team discuss how BNP Paribas see the emerging role of hydrogen in the energy transition how the financing of hydrogen projects differs for newer hydrogen initiatives and why BNP Paribas joined the Hydrogen Council. We also dive into the question of what role can (or even should) Banks play in the evolution and development of the emerging hydrogen market and BNPs plans to expand its activities in this sector. All this and more!
The podcast can be found on their website
The podcast can be found on their website
Everything About Hydrogen Podcast: Changing the Game in Hydrogen Compression
Oct 2021
Publication
In the second episode of EAH's Season 3 Patrick Andrew and Chris sit down with Maria Fennis CEO of HyET. HyET Hydrogen is a leading SME in the field of electrochemical hydrogen compression founded in 2008. HyET has introduced the first commercially viable Electrochemical Hydrogen Compressor (EHPC) the HCS 100 in 2017. HyET enters partnerships with key stakeholders to develop products with a focus on application. Maria is a leading voice in the compression arena and it is a pleasure to have her on the show!
The podcast can be found on their website
The podcast can be found on their website
Everything About Hydrogen Podcast: Catching up on the State of Scale in PEM Electrolysis
Feb 2022
Publication
This episode of EAH is a chance for the team to catch up with one of our early guests on the show Graham Cooley - CEO of ITM Power. For the past twenty years ITM Power PLC has been designing and manufacturing electrolyser systems that generate hydrogen based on proton exchange membrane (PEM) technology. As the first hydrogen related company to be listed on the London Stock Exchange ITM are globally recognised experts in the field of electrolysis. In 2021 the company opened its first Gigafactory in Bessemer Park Sheffield: the world’s largest electrolyser production factory.
The podcast can be found on their website
The podcast can be found on their website
Research on High-Pressure Hydrogen Pre-Cooling Based on CFD Technology in Fast Filling Process
Dec 2021
Publication
In the fast filling process in order to control the temperature of the vehicle-mounted storage tank not to exceed the upper limit of 85 ◦C it is an effective method to add a hydrogen pre-cooling system upstream of the hydrogenation machine. In this paper Fluent is used to simulate the heat transfer process of high-pressure hydrogen in a shell-and-tube heat exchanger and the phase change process of refrigerant R23. The accuracy of the model is proven by a comparison with the data in the references. Using this model the temperature field and gas volume fraction in the heat transfer process are obtained which is helpful to analyze the heat transfer mechanism. At the same time the influence of hydrogen inlet temperature hydrogen inlet pressure and refrigerant flow rate on the refrigeration performance was studied. The current work shows that the model can be used to determine the best working parameters in the pre-cooling process and reduce the operating cost of the hydrogen refueling station.
Hydrogen Energy: a New Dimension for the Energy Cooperation in the Northeast Asian Region
Nov 2020
Publication
The Northeast Asian Region is a home for the major world’s energy importers and Russia – the top energy exporter. Due to the depletion of national fossil energy resources the industrialised East Asian economies are facing serious energy security issues. The snapshot of the intraregional energy trade in 2019 was analysed in terms of development potential. Japan Korea and China are at the frontline of hydrogen energy technologies commercialisation and hydrogen energy infrastructure development. The drivers for such endeavours are listed and national institutions for hydrogen energy development are characterised. The priorities related to regional cooperation on hydrogen energy in Northeast Asia were derived on the basis of hydrogen production cost estimations. These priorities include steady development of international natural gas and power infrastructure. The shared process will lead to the synergy of regional fossil and renewable resources within combined power and hydrogen infrastructure.
Everything About Hydrogen Podcast: Why Generate Capital is Excited About the Prospects of Hydrogen
Dec 2019
Publication
On this weeks episode the team are talking all things hydrogen with Jigar Shah the President of Generate Capital and Co-host of the Energy Gang podcast. Jigar Shah has a well earned reputation as one of the most influential voices in the US clean energy market having pioneered no-money down solar with SunEdison and led the not for profit climate group the Carbon War Room. Since its founding in 2014 Generate Capital the company has provided $130 million of funds to a leading fuel cell provide Plug Power meanwhile in October 2019 Jigar declared hydrogen to be the ultimate clean electricity enabler. On the show we ask Jigar why he thinks Hydrogen is becoming interesting for investors today what business models he feels are exciting and offer the most attractive niches for hydrogen technology businesses whilst getting his side of the story on that time he met Chris at a conference…..All this and more on the show!
The podcast can be found on their website
The podcast can be found on their website
HydroGenerally - Episode 4: Hydrogen in a Global Maritime Industry: Plain Sailing or a Rough Ride?
May 2022
Publication
In this fourth episode Simon Buckley and Matthew Moss from Innovate UK KTN are exploring the use of hydrogen in the global maritime industry alongside their special guest Chester Lewis Business Development Manager at Ryze Hydrogen.
This podcast can be found on their website
This podcast can be found on their website
Integration of Hydrogen and Synthetic Natural Gas within Legacy Power Generation Facilities
Jun 2022
Publication
Whilst various new technologies for power generation are continuously being evaluated the owners of almost-new facilities such as combined-cycle gas turbine (CCGT) plants remain motivated to adapt these to new circumstances and avoid the balance-sheet financial impairments of underutilization. Not only are the owners reluctant to decommission the legacy CCGT assets but system operators value the inertia and flexibilities they contribute to a system becoming predominated with renewable generation. This analysis therefore focuses on the reinvestment cases for adapting CCGT to hydrogen (H2 ) synthetic natural gas (SNG) and/or retrofitted carbon capture and utilization systems (CCUS). Although H2 either by itself or as part of SNG has been evaluated attractively for longer-term electricity storage the business case for how it can be part of a hybrid legacy CCGT system has not been analyzed in a market context. This work compares the power to synthetic natural gas to power (PSNGP) adaptation with the simpler and less expensive power to hydrogen to power (P2HP) adaptation. Both the P2HP and PSNGP configurations are effective in terms of decarbonizations. The best results of the feasibility analysis for a UK application with low CCGT load factors (around 31%) were obtained for 100% H2 (P2HP) in the lower range of wholesale electricity prices (less than 178 GBP/MWh) but in the higher range of prices it would be preferable to use the PSNGP configuration with a low proportion of SNG (25%). If the CCGT load factor increased to 55% (the medium scenario) the breakeven profitability point between P2HP and PSNGP decreased to a market price of 145 GBP/MWh. Alternatively with the higher load factors (above 77%) satisfactory results were obtained for PSNGP using 50% SNG if with market prices above 185 GBP/MWh.
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