工作条件对质子交换膜燃料电池性能的影响

赵明，李国祥，王桂华，白书战^*

山东大学能源与动力工程学院，山东 济南  250061

摘要：采用计算流体力学和有限元的计算方法，建立质子交换膜燃料电池（proton exchange membrane fuel cells，PEMFC）多物理场仿真模型，验证模型的合理性，并分析工作温度、反应物相对湿度、多孔介质孔隙率对燃料电池性能影响。仿真结果表明：仿真模型符合实际且精度较高；在高工作电压下，工作温度、反应物相对湿度、多孔介质孔隙率对PEMFC的输出性能影响不大；在低工作电压下，工作温度低、反应物相对湿度低、多孔介质孔隙率大时PEMFC的输出性能越好。

关键词：PEMFC；数值模拟；多物理场；极化曲线

The impact of operating conditions on the performance of proton exchange membrane fuel cells

ZHAO Ming, LI Guoxiang, WANG Guihua, BAI Shuzhan^*

School of Energy and Power Engineering, Shandong University, Jinan 250061, China

Abstract：Using computational fluid dynamics and finite element methods, a multiphysics simulation model of proton exchange membrane fuel cells (PEMFC) is established to verify the rationality of the model, with a focus on analyzing the effects of operating temperature, relative humidity of reactants, and porosity of porous media on the performance of the fuel cell. The research results indicate that the simulation model is in line with reality and has high accuracy; Under high operating voltage, the working temperature, relative humidity of reactants, and porosity of porous media have little effect on the output performance of PEMFC; At low operating voltage, the output performance of PEMFC is better when the operating temperature is low, the relative humidity of reactants is low, and the porosity of porous media is high. This study can provide reference for the operation strategy of fuel cells.

Keywords: PEMFC; numerical simulation; multiphysics; polarization curve