蛇形流场结构质子交换膜燃料电池的性能研究

Research on performance of serpentine flow field in PEMFC

建立包括催化层、扩散层、质子膜在内的三维质子交换膜燃料电池模型,通过Fluent软件模拟4种不同结构的蛇形流场,通过对速度、膜中水含量以及功率密度等分析得出蛇形流场的最优结构,并对最优结构进行参数优化。研究表明,4种不同蛇形流场结构中,Multi-serpentine II为最优,随着温度、压强的增加,这种流场结构的燃料电池呈现出良好的性能,从而为质子交换膜燃料电池双极板的设计提供依据。

A three-dimensional Proton Exchange Membrane Fuel Cell （PEMFC） model is established, which consists of catalyst layers,gas diffusion layers, and the proton exchange membrane. Four different structures of serpentine flow fields in PEMFC were simulated by FLUENT. The optimal flow field is obtained by the analysis of velocity, membrane water content as well as power density, and the parameters optimization was made to the optimal structure.The results shows that： Multi-serpentine Ⅱ has the best performance. The PEMFC has a better favorable performance with the temperature and pressure increasing,and present a excellent performance,which provide evidence for the design of PEMFC bipolar plate in PEMFC can be achieved.