质子交换膜燃料电池动态特性数值分析  

NUMERICAL ANALYSIS ON TRANSIENT PERFORMANCE OF PEMFC

作　　者：巴黎明[1] 贾力[1] 何海婷[1] 

机构地区：[1]北京交通大学机械与电子控制工程学院,北京100044

出　　处：《工程热物理学报》2008年第4期662-664,共3页Journal of Engineering Thermophysics

基　　金：国家自然科学基金(No.50776006);教育部项目资助(No.107113)

摘　　要：本文基于CFD手段计算分析了质子交换膜燃料电池在启动过程、负载突变两种工况下的动态响应特性,与实验结果进行了对比,分析了其影响因素.分析了燃料电池动态工况下膜内含水量、极板电流和阴极扩散层水饱和度三个参数在负载变化时的响应速度,认为膜内含水量、极板电流在2s左右即可达到平衡,而阴极扩散层水饱和度需较长时间才能达到平衡.The start-up and saltation behavior of PEMFC were analyzed with CFD method, and the results were compared with experiment results. The influence factors of these behaviors were discussed. The response velocity of PEM water content, bipolar current and saturation of cathode GDL to load changing were analyzed. The balance time of PEM water content and bipolar current is about 2 seconds, and the balance of saturation in cathode GDL is a long process.

关 键 词：质子交换膜燃料电池 动态 启动 负载突变 

分 类 号：TK124[动力工程及工程热物理—工程热物理]