Gas Diffusion Layer and Reactant Gas Channel Influence on the Performance of a Ht-pem Fuel Cell
نویسنده
چکیده
Proton exchange membrane fuel cells (PEMFC) are highly efficient power generators, being used recently in a clean hybrid power supply system. Comsol Multiphysics, a commercial solver based on the Finite Element Method (FEM) was used for developing a three dimensional model of a high temperature PEMFC in order to study operation mode and performance of the fuel cell. Cathode gas flow velocity influence on the cell performance was investigated. Gas channel geometry for cell model was optimized by varying the channel width/GDL width ratio λ at values between 0.3 and 0.8, choosing a low operating gas flow velocity of 0.06 m/s and computing the following parameters: water and oxygen molar concentrations at cathode catalyst layer, pressure drop variation across anode GDL and velocity field distribution across the cathode gas channel.
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