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Date of Publication:2022-10-06

Journal:大连理工大学学报

Issue:1

Page Number:55-59

ISSN No.:1000-8608

Abstract:A three-dimensional non-isothermal mathematical model is developed for proton exchange membrane fuel cell (PEMFC) with conventional flow field. The heat and mass transfer and the electrochemical reactions are simulated considering phase change of water. The effects of water vapor condensation and liquid water distribution in porous media on transport processes and cell performance are analyzed, and the results are compared with those of singlephase model. The calculation indicates that the condensation of water vapor enhances the transport of reactant gases to reaction interfaces while decreasing the permeability of porous media. There is a lack of water in anode side at high output current densities for the two models and this requires more effective water management. And the singlephase model underestimates the actual ohmic polarization for neglecting the condensation of water vapor.

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