Abstract

The operation of a fuel cell (PEM) poses serious problems with current density and the inevi-table generation of heat. The problem results from the uniform distribution of reagents and the high electrical resistance of the membrane. To answer the problem posed, we used a commercial code CFD of a fluid flow with chemical reactions. We extended the mathematical description with additional formulas estimating the amount of heat generated due to the Joule-Lenz law. Additionally, we estimated the amount of thermal energy exchanged between the fluid components and the membrane's porous skeleton. We validated the numerical model on the experimental data. We changed the shape of the anode channel and tested four variants in terms of current flux and generated heat. The test results show that it is possible to increase the current flux in all ranges of the fuel cell operation while generating a low heat flux.

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