基于COMSOL的微型HT-PEMFC阴极流场结构分析

Structure analysis of cathode flow field of micro PEMFC based on COMSOL

采用COMSOL软件对微型高温质子交换膜燃料电池蛇形流场结构进行模型的建立和性能仿真,仿真耦合了质量守恒方程、动量守恒方程、电化学反应方程等。对模型进行求解,通过输出电压、电流密度、功率密度等参数,计算分析了阴极流场板内微通道结构参数对电池性能的影响。结果表明,在8 mm×8 mm的有效反应面积内,当流道宽度为600μm,流道深度为400μm,流道间距为400μm时,燃料分配更均匀,可以获得更高的峰值功率密度。

A model of serpentine flow field structure of micro high temperature proton exchange membrane fuel cell is established and analyzed by using COMSOL software,which couples the mass conservation equation model,momentum conservation equation and an electrochemical reaction equation.By solving the model,parameters like current density,voltage and power density are obtained to calculate and analyze the effect of the cathode flow field microchannel size parameter on the cell performance.The result shows that a better performance of the battery can be achieved in the effective reaction area of 8 mm×8 mm with a flow channel width of 600μm,depth of 400μm and a rib width of 400μm.