空冷型PEMFC高海拔地区运行特性研究

Study on operation characteristics of air-cooled PEMFC in high altitude area

研究了空冷型PEMFC在不同海拔高度下的工作特性,分析了操作压力、进气温度及阴极过量系数对电池性能的影响。结果表明:海拔高度从0上升至4000 m,相同进气温度下电池输出性能下降10%,当进气温度随海拔的升高而降低时,电池输出功率下降25.5%。增大阴极过量系数能够增加反应物浓度,提升电池输出性能,同时减小电池内部温差。

The operation characteristics of air-cooled PEMFC at different altitudes were studied in detail.The effects of operating pressure,inlet temperature and stoichiometry on the performance of PEMFC were analyzed.The results show that the performance of PEMFC decreases by 10%at the same inlet temperature when the altitude increases from 0 m to 4000 m.The output power decreases by 25.5%when the inlet temperature decreases simultaneously with the increase of altitude.Increasing the cathode stoichiometry can increase the concentration of reactants,thus it can improve the performance and reduce the internal temperature difference of PEMFC.