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Showing 1 to 20 of 84 for “"PEMFC"”.
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System Level Modeling of Thermal Transients in PEMFC Systems
Fuel cell system models are key tools for automotive fuel cell system engineers to properly size components to meet design parameters without compromising efficiency by over-sizing parasitic components. A transient fuel cell system level model is being developed that includes a simplified transient …
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Towards reliable correlation of microporous layer physical characteristics and PEMFC electrochemical performance
Polymer electrolyte membrane (PEM) fuel cells are promising clean energy alternatives to non - sustainable fossil fuels. During fuel cell operation, external humidification of reactant gases is typically required in order to increase PEM conductivity for improved performance. However, the use of …
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Synthesis and Characterization of Multiblock Copolymers for Proton Exchange Membrane Fuel Cells (PEMFC)
Nanophase-separated hydrophilic-hydrophobic multiblock copolymers are promising proton exchange membrane (PEM) materials due to their ability to form various morphological structures which enhance transport. Four arylene chlorides monomers (2,5-Dichlorobenzophenone and its derivatives) were first …
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Impact of carbon support chemistry, morphology, and structure on platinum catalyst durability for PEMFC applications
… impact, both positive and negative, on PEMFC durability. To do this, three series of samples were analyzed using microscopic, spectroscopic, and electrochemical methods. Electron microscope images provided information on the sample morphology and structural composition. Scanning electron …
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Dynamic modelling and emulation of a high temperature proton exchange membrane fuel cell (HT PEMFC)
… In particular, proton exchange membrane FCs (PEMFCs) presents a good alternative energy source for distributed generation (DG) systems. FCs however, have had limited commercial success despite their performance, durability and low environmental impact in comparison to other energy conversion …
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Influence of catalyst ink mixing procedures on catalyst layer properties and in-situ PEMFC performance
Despite the benefits of fuel cell technology its advancement to being commercially functional is hindered by a number of crucial factors. These factors are often associated with the lack of appropriate materials or manufacturing routes that would enable the cost of electricity per kWh to compete …
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The Integration of State Space into the Dynamic Synthesis/Design and Operational/Control Optimization of a PEMFC System
… and implemented for the components of a 5 kW PEMFC (Proton Exchange Membrane Fuel Cell) system. The system is composed of three subsystems: a stack subsystem (SS), a fuel processing subsystem (FPS), and a work recovery and air supply subsystem (WRAS). To study the effect of control to the …
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Health and conditions monitoring for PEMFC automotive systems: towards on-board, online and near real-time EIS based diagnostics
L'abstract è presente nell'allegato / the abstract is in the attachment
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Transient Model of Heat,Mass,and Charge transfer as well as Electrochemistry in the Cathode Catalyst Layer of a PEMFC
A transient model of the cathode catalyst layer of a proton exchange membrane fuel cell is presented. The catalyst layer structure can be described as a superposition of the polymer membrane, the backing layer, and some additional platinum particles. The model, which incorporates some of the …
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Electrochemical impedance spectroscopy options for proton exchange membrane fuel cell diagnostics
… source of Proton Exchange Membrane Fuel Cell (PEMFC) diagnostic information for many years. Several investigators have characterized different failure modes for PEMFCs using EIS and it now remains to determine how this information is to be obtained and used in a diagnostic or control algorithm …
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Evaluation of the Effect of Microporous Sublayer Design and Fabrication on Performance and Adhesion in PEM Fuel Cell Assemblies
… of the proton exchange membrane fuel cell (PEMFC) contains a layer called the microporous sublayer (MSL). The MSL is a mixture of carbon black and polytetrafluoroethylene (PTFE), which is typically applied to the gas diffusion layer (GDL). The composition (wt.% PTFE) and loading (mg/cm2) can …
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Single stage boost inverter for standalone fuel cell applications
The proton exchange membrane fuel cell (PEMFC) is a promising technology that can be manufactured in South Africa because of the platinum catalyst required. South Africa is rich in platinum and, therefore, the PEMFC system can be cost-effectively produced. In residential stationary applications of …
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Control and Operation of a Microgrid Involving a PEM Fuel Cell Through Analysis and Experimentation
… interfaced proton exchange membrane fuel cell (PEMFC) power module and two synchronous generators operating in an islanded mode. The work includes the experimental investigation of the dynamic characteristics of the distributed generators in this prototype microgrid. A control and operation …
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Investigation of Water Transport Parameters and Processes in the Gas Diffusion Layer of PEM Fuel Cells
… (GDL) of proton exchange membrane fuel cells (PEMFCs). Additionally, experimental fixtures and procedures for the determination of the constitutive relationships are presented. The water transport relationships are incorporated into analytical models that assess the impact of the water …
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Electrochemical Oxidation of Carbon Monoxide in Reformate Hydrogen for PEM Fuel Cells
… of proton exchange membrane fuel cells (PEMFC). Various techniques studied to remove CO from source or mitigate CO poisoning have met with limited success due to fuel loss or increases infrastructure requirements to meet the operating needs. We developed a twin cell electrochemical filter …
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Experimental and numerical analysis of fuel cells
… of a Proton Exchange Membrane Fuel Cell (PEMFC) and Solid Oxide Fuel cell (SOFC). Additionally, experimental studies and numerical simulations on PEMFC gas flow channel, the determination of the impact of the single channel fuel cell are presented. Furthermore, preliminary study is done …
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Porous titanium felts as alternative metal gas diffusion layers for low temperature PEM fuel cells
Proton exchange membrane fuel cells(PEMFCs) use hydrogen to generate electrical energy with water as the only by-product, and are thus highlighted as a key energy conversion technology in the shift towards sustainable energy production. A key component of the PEMFC is the gas diffusion layer (GDL) …
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