质子交换膜燃料电池内部水含量特性分析  

Analysis of internal water content characteristics of proton exchange membrane fuel cell

作　　者：何红曈 刘永峰 裴普成[2] 姚圣卓 HE Hong-tong;LIU Yong-feng;PEI Pu-cheng;YAO Sheng-zhuo(Beijing Key Laboratory of Performance Guarantee on Urban Rail Transit Vehicles,School of Machine-lectricity and Vehicle Engineering,Beijing University of Civil Engineering and Architrcture,Beijing 100044,China;State Key Laboratory of Automotive Safety and Energy,Tsinghua University,Bejing 100084,China)

机构地区：[1]北京建筑大学机电与车辆工程学院城市轨道交通车辆服役性能保障北京市重点实验室,北京100044 [2]清华大学汽车安全与节能国家重点实验室,北京100084

出　　处：《电源技术》2020年第3期386-389,433,共5页Chinese Journal of Power Sources

基　　金：汽车安全与节能国家重点实验室开放基金(KF1825);北京建筑大学市属高校基本科研业务费专项资金(X18083);国家重点研发计划(2017YFB0102705,2016YFB0101305);国家自然科学基金(21676158);北京建筑大学研究生创新项目(PG2019087)。

摘　　要：为研究水含量变化对燃料电池性能的影响,建立了质子交换膜燃料电池冷凝率(RW)模型。该模型利用切换函数确定了蒸发和冷凝的比例关系,考虑了两相流变化和压力降对燃料电池冷凝率的影响。将RW模型通过自定义函数(UDF)导入FLUENT软件中,搭建了实验测试平台,对工作温度60℃、进气相对湿度100%、进气压力分别为10和20 kPa工况下的RW模型、Fluent模型和实验值进行比较分析,结果表明:随着进气压力增加,冷凝速率提高,电池内部水含量明显增加;当工作温度为60℃、进气压力为10 kPa、电流密度为260 mA/cm^2时,相较于实验值,RW模型精确度比Fluent模型提高了21%;在进气压力为20 kPa时,RW模型比Fluent模型提高了31%。A proton exchange membrane fuel cell(PEMFC) water condensation rate(RW) model is established to study the effect of water content changes on fuel cell performance.In this model,the ratio of evaporation and condensation is determined by using the switching function,and the influence of two-phase flow change and pressure drop on the condensation rate of fuel cell is considered.The experimental system is established through the RW model imported into FLUENT software through a user-defined function(UDF) for simulation.The Fluent model,the RW model and experimental data are analyzed and compared at the operating temperature of 60℃,at intake relative humidity of 100% and at inlet pressure of 10 kPa and 20 kPa,respectively.The results show that with the increase of inlet pressure and condensation rate,the water content in the battery increases obviously.When the operating temperature is 60℃,the inlet pressure is 10 kPa,and the current density is 260 mA/cm^2,the accuracy of the RW model is improved by 21% compared with the Fluent model.At the inlet pressure of 20 kPa,the RW model is improved by 31% compared with the Fluent model.

关 键 词：质子交换膜燃料电池(PEMFC) 冷凝率 进气压力 压力降 

分 类 号：TM911[电气工程—电力电子与电力传动]