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 38 for “"Electrolyzer"”.
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Development of Proton Exchange Membrane for Fuel Cell and Electrolyzer
This study focuses on the development and evaluation of advanced polymer electrolyte membranes (PEMs) suitable for proton exchange membrane fuel cells (PEMFCs) and water electrolysis systems. Two novel membrane design strategies were investigated: (i) modification of porous PTFE substrates with …
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Study of Seal Glass for Solid Oxide Fuel/Electrolyzer Cells
… and plays a crucial role in solid oxide fuel/electrolyzer cell performance and durability. A seal glass should have a combination of thermal, chemical, mechanical, and electrical properties in order to seal different cell components and stacks and prevent gas leakage. All the desired …
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Investigation of a novel high temperature solid oxide electrolyzer for solar hydrogen production
This thesis proposes and investigates a new generation of photoelectrochemical cells for solar hydrogen production based on high temperature Solid Oxide Electrolysis Cells. Therefore, a set of experiments are designed to develop and select the most promising materials and configurations. …
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Copper Chloride Electrolyzer For the Production of Hydrogen Via the Copper-Chlorine Thermochemical Cycle
<p>Hydrogen is considered a key element in solving the upcoming energy crisis, it is not the primary fuel source but an 'energy carrier' similar to electricity and has to be produced using some other hydrogen rich source. Thermochemical water decomposition is a promising alternative to …
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Reference Electrode Development in Polymer Electrolyte Membrane (PEM) Electrolyzer Assembly for Novel Investigation of Electrodes
Polymer electrolyte membrane electrolyzers (PEMEs) are the key to integrating renewable energy generation with energy storage to reduce greenhouse gas emissions that contribute to global climate change. The commercialization of large PEME systems, however, requires improvements to electrode design, …
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Energy analysis and fabrication of photovoltaic thermal water electrolyzer and ion transport through modified nanoporous membranes
… system – a so-called “photovoltaic thermal water electrolyzer (PVTE)” – which consists of PV cells positioned on top of a planar micro-water electrolyzers in order to harness waste heat as a storable form of energy. The concept of PVTE has the outputs such as electricity and thermal storage, and …
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Optimizing energy conversion efficiency of a proton exchange membrane green hydrogen generation system while incorporating balance of plant modeling
… that are used to produce green hydrogen are electrolyzers and the most prominent type of electrolyzer today is the proton exchange membrane (PEM) electrolyzer. Most PEM systems are designed for continuous operation with a constant input of electricity. When PEM electrolyzers are coupled with …
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Developing electrochemical methodologies towards addressing challenges in flow energy conversion technologies
Electrolyzer technologies for sustainable fuel production face critical catalyst optimization challenges, particularly in developing energy-efficient alternatives to the oxygen evolution reaction that dominates electrolyzer energy consumption. This dissertation presents electrochemical …
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Techno-Economic Assessment of Electrolytic Hydrogen Production under Dynamic Operations
… optimization model that combines a high-level electrolyzer model and a cost model to evaluate the current (2021) and future (2040) economics of running a PEM electrolyzer under various operating conditions, including dynamic operations and differential-pressure operations. The results show that …
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Hydrogen storage of energy for small power supply systems
… parameters were found to include wind resource, electrolyzer size, distance from electricity grid, price of diesel fuel, and electrolyzer and fuel cell cost. The model verified cell phone industry figures regarding the geographical conditions favorable to diesel genset use. Final results for …
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Gas Transport In Two-Layer Proton Exchange Membranes
<p>A gas-phase sulfur dioxide (SO2) depolarized electrolyzer has been investigated for the large scale production of hydrogen. One issue that negatively affects electrolyzer operation is the diffusion of SO2 from the anode to cathode. A viable method to reduce crossover is to use a thin, …
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Algorithm and Design Tool Development of Sizing a Stand-Alone Pv/Wt/Electrolyzer/Hydrogen/Fuelcell Power Generation System for Electricity Supply Under Weatherrelated Uncertainty Considerations and Thermo-Fluid Effects
Today, reducing the greenhouse gas emissions and decentralizing the electrical power plantshas become a worldwide target, which, in turns, helps in avoiding causing any damage to the environment and increasing and easing the accessibility to the network, respectively, especially at remote areas. …
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Development and assessment of renewable energy based integrated systems for dimethyl ether production
… system consists of a proton exchange membrane electrolyzer system, carbon capturing system and heat recovery from cement furnace, methanol synthesis system and dimethyl-ether synthesis system. The second system consists of a solar heliostat field, solid oxide steam electrolyzer, carbon …
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Modeling process dynamics in membrane-electrolyte-assemblies of chloralkali electrolyzers considering steric and hydration effects
The dynamic operation of the chloralkali electrolyzer has been considered as one of the solution for balancing the supply-demand fluctuation in the electricity grid. This opportunity becomes a motivation to study the complex transient behaviors of the electrolyzer caused by linked multiscale …
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US Green Hydrogen Production: Strategic Approaches to Enhancing Economic Viability and Market Development
… and hydrogen production, and strategic electrolyzer curtailment, a novel operational strategy designed to optimize the sale of both hydrogen and electricity. The analysis utilizes robust datasets including 4 years of hourly wind and solar resource availability in the U.S. at a 3km …
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FIRST ROW TRANSITION METAL OXIDES AS ELECTROCATALYSTS FOR ANION EXCHANGE MEMBRANE FUEL CELLS AND ELECTROLYZERS
… For the transportation sector, fuel cells and electrolyzers represent excellent alternatives to internal combustion engines and gasoline. Electrolyzers can use electricity from renewables such as wind or solar to split water into its elemental components and produce green hydrogen, which can be …
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Modeling, analysis and optimization of integrated energy systems for multigeneration purposes
… water heater, an ejector cooling system and PEM electrolyzer. This proposed multigeneration system can produce electricity, heating, cooling, hot water and hydrogen simultaneously. The overall exergy efficiency of the system is 60%, which is 30% higher than the power generation system. …
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Electrochemical oxidation and reduction of 5-hydroxymethylfurfural in alkaline water electrolyzers
… wind turbines, solar parks, and water turbines. Electrolyzers, which can store electricity from renewable energy in molecules such as hydrogen, but also have the potential to use renewable energy to replace petrochemical-based large-scale processes for synthesizing various chemicals, will play a …
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Design and evaluation of solar and geothermal energy systems integrated with Cu-Cl cycle
… unit and, proton exchange membrane (PEM) electrolyzer. Systems 2 and 3 additionally consist of the copper chlorine (Cu-Cl) thermochemical hydrogen production cycle integrated with a concentrated solar power (CSP) and supercritical geothermal systems, respectively. Electricity, freshwater, …
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Fluid Sealing Challenges in Solid Oxide Electrolysis Cells and Rapid Swap Battery Systems
… the high temperatures present inside solid oxide electrolyzer systems, and the development of seal geometries as well as flow characterization of porous steel wool seals to enable parametric design is documented. As an alternative to current sealing methods, initial development of a composite seal …
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