进气相对湿度对PEMFC能量效率的影响特性分析  

Analysis of the characteristics for the inlet relative humidity effects on energy efficiency of PEMFC

作　　者：刘鑫桐 刘永峰[1] 裴普成[2] 张璐 姚圣卓[1] Liu Xintong;Liu Yongfeng;Pei Pucheng;Zhang Lu;Yao Shengzhuo(Funded by Open Research Fund Program of Beijing Engineering Research Center of Monitoring for Construction Safety,Beijing University of Civil Engineering and Architrcture,Beijing 100044,China;State Key Laboratory of Automotive Safety and Energy,Tsinghua University,Beijing 100084,China)

机构地区：[1]北京建筑大学北京市建筑安全监测工程技术研究中心,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：《可再生能源》2022年第7期853-859,共7页Renewable Energy Resources

基　　金：汽车安全与节能国家重点实验室开放基金课题(KFY2218);北京市建筑安全监测工程技术研究中心研究基金资助课题(BJC2020K005);国家重点研发计划项目(2020YFB1506002);北京建筑大学研究生创新项目(PG2020087)。

摘　　要：为了探究进气相对湿度对质子交换膜燃料电池(PEMFC)发电性能的影响,文章提出了PEMFC能量效率(GE)的数值模型。首先,通过用户自定义函数(UDF)将GE模型添加到Fluent中对划分好的网格进行计算;其次,建立PEMFC试验系统,并将工况参数设置为工作温度为60℃、进气压力为10 kPa、进气相对湿度分别为50%和100%;最后,对GE模型、Fluent模型和试验数据进行比较分析。分析结果表明:当进气相对湿度为50%时,GE模型值的精确度比Fluent模型值提高了约15.18%;当进气相对湿度为100%时,GE模型值的精确度比Fluent模型值提高了约21.07%;PEMFC的能量效率随着进气相对湿度的增加而增加,当进气相对湿度为100%,功率密度增加到110.869 mW/cm^(2)时,PEMFC的能量效率为46.879%。In order to study the effect of inlet relative humidity on the power generation performance of proton exchange membrane fuel cell(PEMFC),a energy efficiency(GE)is established.Firstly,the GE model is imported into Fluent using the user-defined function(UDF).Secondly,a PEMFC experimental system is established and experiments have been done when the operating temperatures are 60℃,the anode and cathode inlet pressure is 10 kPa,and inlet relative humidities are 50%and 100%,respectively.Finally,the GE model,the fluent model and the experiment results are compared and analyzed.The results show that when the inlet relative humidity is 50%,the accuracy of GE model is improved by 15.18%compared with the Fluent model,and when the inlet relative humidity is 100%,the accuracy of GE model is improved by 21.07%compared with the Fluent model,the energy efficiency improves with the increase of inlet relative humidity.When the inlet relative humidity is 100%and the power density increases to 110.869 mW/cm^(2),the maximum energy efficiency is 46.879%.

关 键 词：质子交换膜燃料电池(PEMFC) 能量效率 相对湿度 燃料利用率 

分 类 号：TK91[动力工程及工程热物理] TM911[电气工程—电力电子与电力传动]