Modelling of performance of PEM fuel cells with conventional and interdigitated flow fields
Modelling of performance of PEM fuel cells with conventional and interdigitated flow fields
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DOI：
10.1023/a:1003867012551
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发表时间：
1999-12-01
影响因子：
2.9
通讯作者：
Forges, P
中科院分区：
文献类型：
--
作者：
Kazim, A;Liu, HT;Forges, P
建立了一个简单的数学模型来研究交叉流场设计相对于传统流场设计的优越性，特别是在最大功率密度方面。气体扩散器采用多孔介质的达西方程和具有有效扩散系数的标准扩散方程，催化剂层界面采用Butler-Volmer方程给出的耦合边界条件。研究了质子交换膜燃料电池在常规流场和交叉流场下的性能，并考虑了其他适当的边界条件。理论结果表明，交错流场燃料电池的极限电流密度约为常规流场燃料电池的三倍。交叉流场设计可以使PEM燃料电池的最大功率密度提高一倍。模拟结果与文献中的实验数据吻合较好。
A simple mathematical model is developed to investigate the superiority of the interdigitated flow field design over the conventional one, especially in terms of maximum power density. Darcy's equation for porous media and the standard diffusion equation with effective diffusivity are used in the gas diffuser, and a coupled boundary condition given by the Butler-Volmer equation is used at the catalyst layer interface. The performance of PEM fuel cells with a conventional flow field and an interdigitated flow field is studied with other appropriate boundary conditions. The theoretical results show that the limiting current density of a fuel cell with an interdigitated flow field is about three times the current density of a fuel cell with a conventional flow field. The results also demonstrate that the interdigitated flow field design can double the maximum power density of a PEM fuel cell. The modelling results compared well with experimental data in the literature.