Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 37 for “"Electrolyser"”.
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Risk and safety assessment of an alkaline electrolyser system for green hydrogen production
… a risk and safety assessment of an alkaline electrolyser system for a green hydrogen production facility theoretically based in the Western Cape region (South Africa). The green hydrogen facility produced 59 ktpa of hydrogen for use in producing 280 ktpa green ammonia. The facility was …
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Development and analysis of a high temperature electrolyser for the Cu-Cl cycle for hydrogen production
… study the J-V characteristics for the proposed electrolyser (a solid oxide electrolyser based on proton conducting electrolyte). The developed model includes all the major losses namely activation, concentration and ohmic losses. Furthermore, energy and exergy analyses are also carried out. The …
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Development of an ambient temperature alkaline electrolyser for integrating with the electrical grid and renewable energy system
Electrolytic hydrogen production from an alkaline electrolyser is considered a promising energy storage technology that integrates renewable energy sources such as wind, solar, wave and tidal energy with the electrical grid. Hydrogen energy systems consisting of conventional temperature (at 80°C) …
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Design of an axial-flux generator for a small-scale wind electrolysis plant
… selection and design of a wind generator to meet electrolyser requirements. These are the hydrogen production rate, the power requirements and the operating temperature. This requires the analysis of the load, sizing and characterizing of an electrolyser and finally, the design of a wind generator …
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Development of a small-scale electro-chlorination system for rural water supplies
… hypochlorite generator, or “membrane electrolyser”, with an automated hypochlorite dosing system.The system was designed to (i) coordinate hypochlorite production and dosing automatically in a flow-through system, and (ii) fit inline with low pressure pipelines from overhead storage …
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A geospatial economic analysis of hydrogen production from offshore wind using electrolysers
… offshore wind energy. Two concepts for combining electrolysers with offshore wind farms to produce hydrogen are considered. In the first concept, the centralised electrolyser is located offshore, while the second considers an onshore centralised electrolyser. The first aim is to develop a model to …
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Evaluation of process parameters and membranes for SO2 electrolysis
… options for large scale application. The SO2 electrolyser is applied in producing H2 gas and H2SO4 by electro-chemically converting SO2 gas and water. This study focused firstly on the evaluation of the performance of the SO2 electrolyser for the production of hydrogen and sulphuric acid, …
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The development of appropriate brine electrolysers for disinfection of rural water supplies
A comparative study of electrolysers using different anodic materials for the electrolysis of brine (sodium chloride) for the production of sodium hypochlorite as a source of available chlorine for disinfection of rural water supplies has been undertaken. The electrolyser design used was tubular in …
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Electrofuels in a circular economy
… low grid demand. Combining technologies such as electrolysers (capable of producing hydrogen and oxygen) and biomethanation (which can combine carbon dioxide with hydrogen to form biomethane), offer a green alternative to fossil natural gas, and can use the existing gas grid as both a …
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OXYHYH20-Integrated Renewable Hydrogen and Oxygen Production for Reduced Emissions in Wastewater Treatment Plant Operations
… analysis was performed. The relationship between electrolyser size and WWTP oxygen demand was studied, and it was found that electrolysers ranging from 0.5 MW to 60 MW would be required to supply enough oxygen to a WWTP size range (25-3500 kpe). The use of electrolytic oxygen to replace existing …
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Technical and economical evaluation of Power-to-Methane technologies, based on green H2 and biogenic CO2
… 2.27 and 2.85 €/Nm3, in the case of polymeric electrolyser membrane technology (PEM) with 56% of energy from RES and alkaline electrolyser (AEL) with 75% of energy from RES, respectively. Finally, including such a system in the Sardinia energy scenario, can provide a contribution of about 44% …
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Improved System Models for Building-Integrated Hybrid Renewable Energy Systems with Advanced Storage: A Combined Experimental and Simulation Approach
… a hydrogen loop composed of alkaline electrolyser, gas storage and proton exchange membrane (PEM) fuel cell, and a VRFB. In addition, the application of building-integrated HRES at customer level to increase the self-consumption of the onsite generated electricity and to lower the grid …
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Electrocatalysis of oxide-based materials for the oxygen reduction and evolution reactions
Electrochemical devices, such as fuel cells and electrolysers, are said to be at the forefront of a renewable energy technology revolution centred on hydrogen as an energy carrier. These devices rely on the chemical reactions of oxygen, namely the oxidation of water to evolve oxygen (oxygen …
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Investigation of energy storage options for sustainable energy systems.
… System 1 consists of a PV system, a water electrolyser and a fuel cell to generate electricity for a house. Hydrogen and thermal energy storage are considered as the storage options. The results show that the capacities of the components depend on weather data and electric power demand. In …
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Demand Led Tidal Lagoon Power and Hydrogen Energy Storage - Supervisory Control and Optimisation
… of no power generation. A system consisting of electrolysers and compression produce hydrogen to storage, while fuel cells supplying power from that storage can bridge the intermittency to meet a continuous unpredictable power demand. This requires start-stop signals for the equipment as well a …
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Thermodynamic anaysis of an integrated photovoltaic system for hydrogen and methanol production
… of the system are reduced by 30% if the electrolyser operates at 300 K. The efficiencies of the system are also highly dependent on the solar intensity. The system efficiencies can be tripled if the intensity of solar radiation is increased to 600 W/m2 instead of 250 W/m2.
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Electrolytic purification of water
… are useful they are separated in a specialised electrolyser for re-use in the process that produced the original effluent. The value in doing this exceeds the cost of electrolytic processing for tannery effluent. The functions of an electrolytic purifier were resolved into: flotation by bubbles, …
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Technical and economic assessment of renewable hydrogen production and utilization for the transportation sector
… renewable hydrogen production due to its high electrolyser stack efficiency (58%-75%), the high purity of the produced hydrogen (99.99%), rapid advancement in technology readiness level ((TRL) which is expected to reach 9 by 2030), quick system response time (milliseconds), compact design, and …
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Assessment of the performance of a Photovoltaic (pv) system for powering electrolysers in the green hydrogen project at Tsau//khaebs National Park using modelling and simulation approach
… focuses on the PV system required to power the electrolyser, involving site analysis, component selection, and system optimisation using PVsyst and Fraunhofer Zenit. Economic evaluation was conducted via Levelized Cost of Energy (LCOE) calculations. A site investigation using QGIS, Google Earth, …
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Mesoporous oxides as efficient catalysts for the electrocatalytic oxygen evolution reaction (OER)
… splitting. However, the efficiency of water electrolysers is limited by the slow kinetics of oxygen evolution reaction (OER). An increase in mass based OER activity is mandatory for a lower capital cost of electrolyser cells. In this thesis, synthesis routes are presented for new mesoporous …
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