Influence of the Design Parameters in a Proton Exchange Membrane (PEM) Fuel Cell on the Mechanical Behavior of the Polymer Membrane
Influence of the Design Parameters in a Proton Exchange Membrane (PEM) Fuel Cell on the Mechanical Behavior of the Polymer Membrane
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DOI：
10.1021/ef060596x
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发表时间：
2007-05
期刊：
影响因子：
5.3
通讯作者：
M. Al-Baghdadi;H. A. K. S. Al-Janabi
中科院分区：
文献类型：
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作者：
M. Al-Baghdadi;H. A. K. S. Al-Janabi
建立了具有直流道的质子交换膜(PEM)燃料电池的全三维非等温计算流体力学模型，模拟了电池运行过程中聚合物膜内的水力应变和热应变。这个综合模型考虑了质子交换膜燃料电池中的主要输运现象：对流和扩散的热质传递、电极动力学、水的输运和相变机理以及电位场。该模型被证明能够理解许多相互作用的、复杂的电化学、传输现象和有限的实验数据的应力分布。利用该模型研究了设计参数对聚合物膜性能的影响。这项研究的结果帮助我们确定了关键参数，并深入了解了导致燃料电池在各种操作条件下性能的物理机制。结果表明，应力分布不均匀、应力分布不均匀等问题。
A full three-dimensional, non-isothermal computational fluid dynamics model of a proton exchange membrane (PEM) fuel cell with straight flow field channels has been developed to simulate the hygro and thermal strains in a polymer membrane, which developed during the cell operation. This comprehensive model accounts for the major transport phenomena in a PEM fuel cell: convective and diffusive heat and mass transfer, electrode kinetics, transport and phase-change mechanism of water, and potential fields. The model is shown to understand the many interacting, complex electrochemical, transport phenomena, and stresses distribution that have limited experimental data. This model is used to study the effect of design parameters on the behavior of the polymer membrane. The results of this study helped us identify critical parameters and shed insight into the physical mechanisms leading to a fuel cell performance under various operating conditions. The results show that the nonuniform distribution of stresses, ...