Abstract
Because the operation of a passive type polymer electrolyte fuel cell (passive type PEFC) is accompanied with complex phenomena such as an electrochemical reaction, heat and flow, it is hard to obtain an appropriate orientation for the improved design. Numerical analysis is conducted for the purpose of obtaining the parameters in the improved design, which leads to reduction of time and expense in a trial production and an experiment. In this paper, using the COMSOL Multiphysics, a general commercial software, was used to compute the multiphysics of the passive type PEFC. The model uses current balances, mass transport equations (Maxwell-Stefan diffusion for reactant, water and nitrogen gas), and momentum transport (gas flow) to simulate a passive type PEFC's behavior. The results showed that the computed diffusion velocity vectors of 02 and H2O, the mass fraction of H2O, and the current density on the MEA surface were qualitatively reasonable well.
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