Dynamic models currently proposed in published papers are either based on Computational Fluid Dynamics or lumped parameters. The model based on the CFD needs high number of parameters and variables that cannot be easily measured and characterized, while the lumped model does not well represent the real behavior. We developed a stack model that considers two-phase effects in gas flow channels and gas diffusion layers, and temperature effects in the cell. Firstly, we construct a 20 cell model and analyze the cell performance dependent upon locations of the cells. The results of distribution of the physical quantities are used to extend the cells to a 100 cell. Included are analyses of the dynamic performances of the 20-cell stack and the proposed 110-cell stack models.

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