ポアネットワークモデルによるGDL内液滴挙動解析(<特集>第14回動力・エネルギー技術シンポジウム)

概要

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In order to improve the output performance of PEFC, it is important to investigate the two-phase condition in gas diffusion layer (GDL). In this study, the simulated GDL structures, which were carbon paper and carbon cloth, were developed by numerical analysis including the random orientation of carbon fibers. As structural properties, pore size distribution was calculated, and these values almost agreed with actual measurement values. Furthermore, our past two-phase network model was improved, and the model based on an actual heterogeneous structure was developed by a direct 3D networking porous structure. And the influence of GDL structure on the two-phase condition with accumulated water was evaluated, and effective diffusion coefficient of oxygen in GDL with liquid water was calculated. It became possible to compare the performance of mass transfer in various wet GDL.
2010-03-25