- Home
- A-Z Publications
- Publications
Publications
Thermodynamic Evaluation of Bi-directional Solid Oxide Cell Systems Including Year-round Cumulative Exergy Analysis
Jun 2018
Publication
Bi-directional solid oxide cell systems (Bi-SOC) are being increasingly considered as an electrical energy storage method and consequently as a means to boost the penetration of renewable energy (RE) and to improve the grid flexibility by power-to-gas electrochemical conversion. A major advantage of these systems is that the same SOC stack operates as both energy storage device (SOEC) and energy producing device (SOFC) based on the energy de Read More
Accumulation of Inert Impurities in a Polymer Electrolyte Fuel Cell System with Anode Recirculation and Periodic Purge: A Simple Analytical Model
Mar 2022
Publication
Anode recirculation with periodic purge is commonly used in polymer electrolyte fuel cell systems to control the accumulation of nitrogen water and other impurities that are present in the fuel or diffuse through the membrane from the cathode compartment. In this work we develop a simple generalized analytical model that simulates the time dependence of the accumulation of inert impurities in the anode compartment of such a system. It is sho Read More
Numerical Simulation of Hydrogen Leakage and Diffusion Process of Fuel Cell Vehicle
Oct 2021
Publication
Regarding the problem of hydrogen diffusion of the fuel cell vehicle (HFCV) when its hydrogen supply system leaks this research uses the FLUENT software to simulate numerical values in the process of hydrogen leakage diffusion in both open space and closed space. This paper analyzed the distribution range and concentration distribution characteristics of hydrogen in these two different spaces. Besides this paper also took a survey about the effects of leak Read More
Energy, Exergy, and Economic Analysis of Cryogenic Distillation and Chemical Scrubbing for Biogas Upgrading and Hydrogen Production
Mar 2022
Publication
Biogas is one of the most important sources of renewable energy and hydrogen production which needs upgrading to be functional. In this study two methods of biogas upgrading from organic parts of municipal waste were investigated. For biogas upgrading this article used a 3E analysis and simulated cryogenic separation and chemical scrubbing. The primary goal was to compare thermoeconomic indices and create hydrogen by reforming biom Read More
Everything About Hydrogen Podcast: Hydrogen: The Next Generation
May 2021
Publication
This is the inaugural episode of the EAH: Deep Dive podcast mini-series! Our first episode features the co-founders of Enapter Vaitea Cowan and Jan Justus-Schmidt. Enapter is a young company that has made a big splash in the hydrogen space with their modular scalable AEM electrolyzer technology. Last year they made headlines with their successful public offering on the DAX and the company is expected to be a the forefront of the hydrogen sector ag Read More
Cost-Economic Analysis of Hydrogen for China’s Fuel Cell Transportation Field
Dec 2020
Publication
China has become a major market for hydrogen used in fuel cells in the transportation field. It is key to control the cost of hydrogen to open up the Chinese market. The development status and trends of China’s hydrogen fuel industry chain were researched. A hydrogen energy cost model was established in this paper from five aspects: raw material cost fixed cost of production hydrogen purification cost carbon trading cost and transportation cost. The ec Read More
Evolutions in Hydrogen and Fuel Cell Standardization: The HarmonHy Experience
Dec 2007
Publication
HarmonHy is a European Union-funded Specific Support Action aiming to make an assessment of the activities on hydrogen and fuel cell regulations codes and standards (RCS) on a worldwide level. On this basis gaps have been identified and potential conflicts between regulations codes and standards have been investigated. Types of document to be referred to include international regional and national standards EU directives UNECE regulations… Particul Read More
Numerical Investigation of Thermal Hazards from Under-expanded Hydrogen Jet Fires using a New Scheme for the Angular Discretization of the Radiative Intensity
Sep 2021
Publication
In the context of a numerical investigation of thermal hazards from two under-expanded hydrogen jet fires results from a newly-developed thermal radiation module of the ADREA-HF computational fluid dynamics (CFD) code were validated against two physical experiments. The first experiment was a vertical under-expanded hydrogen jet fire at 170 bar with the objective of the numerical investigation being to capture the spatial distribution of the radial Read More
Controlled Autoignition of Hydrogen in a Direct-injection Optical Engine
Mar 2021
Publication
Research into novel internal combustion engines requires consideration of the diversity in future fuels in an attempt to reduce drastically CO2 emissions from vehicles and promote energy sustainability. Hydrogen has been proposed as a possible fuel for future internal combustion engines and can be produced from renewable sources. Hydrogen’s wide flammability range allows higher engine efficiency than conventional fuels with both reduced toxic emissions Read More
Determinants of Consumers’ Purchasing Intentions for the Hydrogen-Electric Motorcycle
Aug 2017
Publication
In recent years increasing concerns regarding the energy costs and environmental effects of urban motorcycle use have spurred the development of hydrogen-electric motorcycles in Taiwan. Although gasoline-powered motorcycles produce substantial amounts of exhaust and noise pollution hydrogen-electric motorcycles are highly energy-efficient relatively quiet and produce zero emissions features that suggest their great potential to reduce th Read More
The Role of Renewable Hydrogen and Inter-seasonal Storage in Decarbonising Heat – Comprehensive Optimisation of Future Renewable Energy Value Chains
Nov 2018
Publication
Demands for space and water heating constitute a significant proportion of the total energy demands in Great Britain and are predominantly satisfied through natural gas which makes the heat sector a large emitter of carbon dioxide. Renewable hydrogen which can be injected into the gas grid or used directly in processes for generating heat and/or electricity is being considered as a low-carbon alternative energy carrier to natural gas because o Read More
Artificial Neural Networks for Predicting Hydrogen Production in Catalytic Dry Reforming: A Systematic Review
May 2021
Publication
Dry reforming of hydrocarbons alcohols and biological compounds is one of the most promising and effective avenues to increase hydrogen (H2 ) production. Catalytic dry reforming is used to facilitate the reforming process. The most popular catalysts for dry reforming are Ni-based catalysts. Due to their inactivation at high temperatures these catalysts need to use metal supports which have received special attention from researchers in recent ye Read More
Design and Development of a Catalytic Fixed-Bed Reactor for Gasification of Banana Biomass in Hydrogen Production
Apr 2022
Publication
Hydrogen produced from biomass is an alternative energy source to fossil fuels. In this study hydrogen production by gasification of the banana plant is proposed. A fixed-bed catalytic reactor was designed considering fluidization conditions and a height/diameter ratio of 3/1. Experimentation was carried out under the following conditions: 368 ◦C atmospheric pressure 11.75 g of residual mass of the banana (pseudo-stem) an average particle diameter Read More
Simulation of Turbulent Combustion in a Small-scale Obstructed Chamber Using Flamefoam
Sep 2021
Publication
Dynamic overpressures achieved during the combustion are related to the acceleration experienced by the propagating flame. In the case of premixed turbulent combustion in an obstructed geometry obstacles in the direction of flow result in a complex flame front interaction with the turbulence generated ahead of it. The interaction of flame front and vortex significantly affect the burning rate the rate of pressure rise and achieved overpressure the Read More
An Innovative Approach for Energy Transition in China? Chinese National Hydrogen Policies from 2001 to 2020
Jan 2023
Publication
To accelerate clean energy transition China has explored the potential of hydrogen as an energy carrier since 2001. Until 2020 49 national hydrogen policies were enacted. This paper explores the relevance of these policies to the development of the hydrogen industry and energy transition in China. We examine the reasons impacts and challenges of Chinese national hydrogen policies through the conceptual framework of Thomas Dye’s policy analysis met Read More
Impact of Hydrogen on Natural Gas Compositions to Meet Engine Gas Quality Requirements
Oct 2022
Publication
To meet the target of reducing greenhouse gas emissions hydrogen as a carbon-free fuel is expected to play a major role in future energy supplies. A challenge with hydrogen is its low density and volumetric energy value meaning that large tanks are needed to store and transport it. By injecting hydrogen into the natural gas network the transportation issue could be solved if the hydrogen–natural gas mixture satisfies the grid gas quality requiremen Read More
Effect of State of Charge on Type IV Hydrogen Storage Tank Rupture in a Fire
Sep 2021
Publication
The use of hydrogen storage tanks at 100% of nominal working pressure NWP is expected only after refuelling. Driving between refuellings is characterised by the state of charge SoC<100%. There is experimental evidence that Type IV tanks tested in a fire at initial pressures below one-third of its NWP depending on a fire source were leaking without rupture. This paper aims at understanding this phenomenon and the development of a predictive model. Th Read More
Green Hydrogen from Anion Exchange Membrane Water Electrolysis: A Review of Recent Developments in Critical Materials and Operating Conditions
Mar 2020
Publication
Hydrogen production using water electrolysers equipped with an anion exchange membrane (AEM) a pure water feed and cheap components such as platinum group metal-free catalysts and stainless steel bipolar plates (BPP) can challenge proton exchange membrane (PEM) electrolysis systems as the state of the art. For this to happen the performance of the AEM electrolyzer must match the compact design stability H2 purity and high current densiti Read More
Machine Learning-based Energy Optimization for On-site SMR Hydrogen Production
Jun 2021
Publication
The production and application of hydrogen an environmentally friendly energy source have been attracting increasing interest of late. Although steam methane reforming (SMR) method is used to produce hydrogen it is difficult to build a high-fidelity model because the existing equation-oriented theoretical model cannot be used to clearly understand the heat-transfer phenomenon of a complicated reforming reactor. Herein we developed an artificial Read More
Recent Insights into Low-Surface-Area Catalysts for Hydrogen Production from Ammonia
Nov 2022
Publication
A potential method of storing and transporting hydrogen safely in a cost-effective and practical way involves the utilization of molecules that contain hydrogen in their structure such as ammonia. Because of its high hydrogen content and carbon-free molecular structure as well as the maturity of related technology (easy liquefaction) ammonia has gained attention as a “hydrogen carrier” for the generation of energy. Unfortunately hydrogen produ Read More
No more items...