不同参数对大功率质子交换膜燃料电池性能的影响

Effects of Different Parameters on the Performance of High-Power Proton Exchange Membrane Fuel Cells

为探明大功率质子交换膜燃料电池(PEMFC)的运行参数及结构参数对其输出性能的影响规律,基于gfuelcell平台,建立120 kW质子交换膜燃料电池电堆分析模型,探究质子交换膜厚度、空气湿度、电堆温度、冷却水流量对大功率电堆极化曲线的影响,结果表明:降低质子交换膜厚度、增加空气湿度、增加冷却水流量以及提高空气过量系数均有助于提高燃料电池输出电压,改善电堆性能,电堆温度、空气湿度以及空气过量系数对燃料电池性能影响是有一定限度的,达到最优状态后,提高参数不会改善电池的性能。

In order to investigate the influence of operating parameters and structural parameters on the output performance of high-power proton exchange membrane fuel cells (PEMFC), an analytical model of a 120 kW PEMFC stack was established based on the gfuelcell platform to investigate the effects of proton exchange membrane thickness, air humidity, stack temperature and cooling water flow rate on the polarization curve of high-power stacks. The results show that decreasing the thickness of the proton exchange membrane, increasing the air humidity, increasing the cooling water flow rate and increasing the air excess coefficient all help to increase the fuel cell output voltage and improve the performance of the fuel cell. However, stack temperature, air humidity, and air excess coefficient also have a limited effect on fuel cell performance, and changing the parameters will not enhance the cell performance after the optimum condition is reached.