Geometrical Parameters Influence on PEM Fuel Cell Performance
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In order to model the transport phenomena in the porous materials used in Polymer Electrolyte Membrane Fuel Cells, a two-dimensional PEM fuel cell model has been developed and used to investigate the effects of thickness on cell performance parameters. The governing equations of the overall steady state PEM fuel cell model is represented by the Navier–Stokes equations, consisting of the momentum equations, the continuity equation, the species and energy transport. They were used to model the oxygen molar fraction, electrolyte and solid potential distributions in the flow channels, backing layers, catalyst layers and membrane. The coupled partial differential and electrochemical equations theory are solved basing on the control-volume method. The catalyst layer and membrane thickness involved the performance of the PEM fuel cell. This latter is considered as a reasonable approximation for the effects of geometrical parameters which will be inherently used for further parametric studies.
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