Abstract
In this study, the deformation effect of gas diffusion layer (GDL) on the pressure drop of polymer electrolyte fuel cell (PEFC) separator channel has been investigated both numerically and experimentally. Gas channel and gas diffusion layers are regarded as two important parts of PEFC because they transport reactant gases to the catalyst layer and also byproduct from the catalyst layer. The deformation of GDL caused by the compression pressure plays an important role in the performance of PEFC since it affects the physical properties of the GDL, such as porosity, permeability and the cross sectional area of the gas channel. The flow behavior in the separator channel and GDL of PEFC has been investigated by using a transient, isothermal and three-dimensional numerical model. To develop the numerical simulation of PEFC, verification experiments and data acquisition of physical parameters were conducted by mechanical measurements.
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