Publications

The increasing global residential energy demand causes carbon emissions and ecological impacts necessitating cleaner efficient solutions. This study presents an innovative hybrid energy system integrating wind power and gas turbines for a four-story 16-unit residential building. The system generates electricity heating cooling and hydrogen using a Proton Exchange Membrane electrolyzer and a compression chiller. Integrating the electrolyzer e Read More

The emergence and design of hydrogen transport infrastructures are crucial steps towards the development of a hydrogen economy. However pipeline routing remains underdeveloped in hydrogen infrastructure design models despite its significant impact on the resultant cost and network configuration. Many previous studies assume uniform cost surfaces on which pipelines are designed. Studies that consider a variable cost surface focus on desig Read More

In the context of reducing the global emissions of greenhouse gaseshydrogen (H2) has become an attractive alternative to substitute the current fossil fuels.However its properties seasonal fluctuations and the lack of extended energy stabilitymade it extremely difficult to be economically and safely stored for a long term in recentyears. Therefore this paper investigated the potential of shale gas reservoirs (rich andlow clay−rich silica minerals) to sto Read More

The renewable hydrogen economy is recognized as an integral solution for decarbonizing energy sectors. However high costs have hindered widespread deployment. One promising way of reducing the costs is optimization. Optimization generally involves finding the configuration of the renewable generation and hydrogen system components that maximizes return on investment. Previous studies have included many aspects into their optimisations incl Read More

The present study aims to conduct a thermodynamic analysis of a novel concept that synergistically integrates clean hydrogen and power production with a liquified natural gas (LNG) regasification system. The designed integrated energy system aims to achieve hydrogen production power production liquified natural gas regasification carbon capture storage and in situ recirculation. Hydrogen sulfide (H2S) from industrial waste streams is used as a majo Read More

The decarbonization of the building stock in this paper focusing the single-family house sector in Germany is essential to achieve the climate goals. In fact as the largest part of the building stock it represents more than 65 % of the entire German residential building stock. Current strategies and regulations have demonstrated low impact on carbon emission reduction due to poor renovation rates particularly in the single-family house typology. The present Read More

Ammonia is a versatile energy carrier without carbon emissions that can be used for power generation. In this article a techno-economic analysis has been done to predict the levelized cost of electricity production using gas turbines with clean fuel in Iran. In the technical discussion the analysis of different scenarios of ammonia and hydrogen fuel composition ratio was done and by keeping the turbine inlet temperature to the same gas turbine as the Read More

For fast-tracking climate change response green hydrogen is key for achieving greenhouse gas neutral energy systems. Especially Sub-Saharan Africa can benefit from it enabling an increased access to clean energy through utilizing its beneficial conditions for renewable energies. However developing green hydrogen strategies for Sub-Saharan Africa requires highly detailed and consistent information ranging from technical environmental economic a Read More

The present study proposes and thoroughly examines a novel approach for the effective hybridization of solar and wind sources based on hydrogen storage to increase grid stability and lower peak load. The parabolic trough collector vanadium chloride thermochemical cycle hydrogen storage tank alkaline fuel cells thermal energy storage and absorption chiller make up the suggested smart system. Additionally the proposed system includes a wind turbin Read More

In the context of renewable energy systems microgrids (MG) are a solution to enhance the reliability of power systems. In the last few years there has been a growing use of energy storage systems (ESSs) such as hydrogen and battery storage systems because of their environmentally-friendly nature as power converter devices. However their short lifespan represents a major challenge to their commercialization on a large scale. To address this issue the Read More

The energy hub (EH) concept is an efficient way to integrate various energy carriers. Inaddition demand response programmes (DRPs) are complementary to improving anEH's efficiency and increase energy system flexibility. The hydrogen storage system as agreen energy carrier has an essential role in balancing supply and demand preciselysimilar to other storage systems. A hybrid robust‐stochastic approach is applied herein toaddress fluctuations in wind Read More

Ammonia is a particularly promising hydrogen carrier due to its relatively low cost high energy density its liquid storage and to its production from renewable sources. Thus in recent years great attention is devoted to this fuel for realizing next generation refueling stations according to a carbon-free energy economy. In this paper a distributed onsite refueling station (200 kg/day of hydrogen filling 700-bar HFCEVs (Hybrid Fuel Cell Electric Vehicles) with Read More

Hydrogen is a crucial energy carrier for the Clean Energy Sustainable Development Goals and the just transition to low/zero-carbon energy. As a top CO2-emitting country hydrogen (especially green hydrogen) production in South Africa has gained momentum due to the availability of resources such as solar energy land wind energy platinum group metals (as catalysts for electrolysers) and water. However the demand for green hydrogen in South Afric Read More

Currently green hydrogen generated through renewable energy sources stands out as one of the best substitutes for fossil fuels in mitigating pollutant emissions and consequent global warming. Particularly the utilization of hydrogen in spark ignition engines has undergone extensive study in recent years. Many aspects have been analyzed: the conversion of gasoline engines to hydrogen operation the combustion duration the heat transfer and in ge Read More

In order to realize carbon mitigation and the efficient utilization of waste biogas the biogas-to-methanol process is an important method. The syngas produced by the conventional biogas reforming technology is rich in CO2 and CO whereas it is poor in hydrogen. Therefore additional H2 is introduced into the system to adjusted the syngas ratio promoting the efficient conversion of the biogas. However the use of traditional H2 production technologie Read More

Methanol reforming is considered to be one of the most promising hydrogen production technologies for hydrogen fuel cells. It is expected to solve the problem of hydrogen storage and transportation because of its high hydrogen production rate low cost and good safety. However the strong nonlinearity and slow response of the pressure and temperature subsystems pose challenges to the tracking control of the methanol reforming hydrogen producti Read More

Hydrogen is considered a promising solution for global decarbonisation as an alternative to fossil fuels. However it can interact with and brittle most metallic materials and is highly flammable. These properties call for a systematic investigation of physical and chemical hazards and for the definition of a comprehensive risk management and monitoring framework including proper maintenance planning. This study aims at establishing a hydrogen Read More

This study presents sector-coupled PyPSA-Earth: a novel global open-source energy system optimization model that incorporates major demand sectors and energy carriers in high spatial and temporal resolution to enable energy transition studies worldwide. The model includes a workflow that automatically downloads and processes the necessary demand supply and transmission data to co-optimize investment and operation of energy systems of cou Read More

A thermodynamic assessment using Gibbs free energy minimization to explore the potential of winery wastewater steam reforming (WWWSR) as a technique to treat water while simultaneously producing renewable hydrogen was conducted for the first time. This assessment focused on four types of reactors: a conventional reactor (CR) a sorption-enhanced reactor (SER) with CO2 capture a membrane reactor (MR) with H2 removal and a sorption-enhanc Read More

This study investigates hydrogen-diesel dual-fuelling specifically for a modern 4.4L 4-cylinder heavy-duty diesel engine using extensive one-dimensional combustion modelling in Ricardo WAVE. Parametric analyses from 900 to 2200 rpm speeds and 0 to 17.5% hydrogen fractions introduced via port injection are undertaken to assess the effect of exhaust gas recirculation (EGR) for controlling NOx. Moreover impacts on key indicators like brake power to Read More

In response to the issues of insufficient flexibility in the operation of hydrogen storage and hydrogen production equipment with poor economic viability when operated independently in the park firstly a comprehensive energy system model for hydrogen storage and power generation which considering the multi-operational conditions of alkaline electrolyzers (ELE) is constructed. This model is integrated into the comprehensive en ergy system of the park a Read More

Research into the off-grid hybrid energy system to provide reliable electricity to a remote community has extensively been done. However simultaneous meeting electric freshwater and gas demands from the off-grid hybrid energy sources are very scarce in literature. Power- to-X (PtX) is gaining attention in recent days in the energy transition scenarios to generate green hydrogen the primary product of the process as an energy carrier which is deem Read More

Hydrogen has become an important component of the global transition to zero-carbon economies. Low-carbon and green hydrogen gas and fuel cell technology for domestic household use will depend on skilled practi tioners particularly gasfitters to convert install and maintain hydrogen-based appliances. Upskilling gasfitters to work with hydrogen is critical to transitioning from natural gas to hydrogen for heating and cooking. Yet limited research exi Read More

The article provides a short review on catalyst-based processes for the production of hydrogen starting from methane both of fossil origin and from sustainable processes. The three main paths of steam- and dry-reforming partial oxidation and thermo-catalytic decomposition are briefly introduced and compared above all with reference to the latest publications available and to new catalysts which obey the criteria of lower environmental impact Read More

The increasing demand for carbon-free energy in recent years has positioned hydrogen as a viable option. However its current production remains largely dependent on carbon-emitting sources. In this context natural hydrogen generated through geological processes in the Earth’s subsurface has emerged as a promising alternative. The present study provides the first national-scale assessment of natural dihydrogen (H2) potential in Uruguay by developin Read More