A full scope three-dimensional model is proposed in this paper to investigate the local flowfields and electrochemical parameters within a proton exchange membrane fuel cell. Based on the computational fluid dynamics, this model cristics of flowfields and electrochemical parameters can be obtained. The predicted relationships between cell voltage and current density (i.e. performance curve) correspond well to the experimental data. The positive effects of both the temperature and pressure on the cell performance are precisely captured. In addition, the present model can also reasonably simulate the concentration polarization effect that decreases the cell performance, as the cell is operated at the higher current density.
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