電極多孔質構造を包含したカソード内水分移動の数値シミュレーション(テクニカルフォーラム1 水素の製造・輸送・貯蔵・利用)

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  • Numerical simulation on water transport in a PEFC cathode with porous gas diffusion layer

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The polymer electrolyte fuel cell (PEFC) is expected as one of the next power generation system. Although high-performance PEFC is expected, understanding of mass transfer is not enough due to the complex structure of PEFC. So it is very important to investigate the mass transfer inside the porous gas diffusion layer. We calculated the distribution of water concentration to simulate water transfer in PEFC cathode with porous gas diffusion layer. We used lattice Boltzmann method (LBM) to calculate the flow and water transfer in porous media, because LBM is easy to set boundary conditions. From these result, we suggest the way to estimate the conditions that PEFC works without flooding and concentration overvoltage.

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