PEM燃料电池气体扩散层液滴运动的可视化实验研究  

Visualization of water transport in GDL and flow channel of PEMFC

作　　者：马悦[1] 贾力[1] 张竹茜[1] 汪霞[2] 

机构地区：[1]北京交通大学机电学院动力系,北京100044 [2]奥克兰大学机械工程系,美国MI 48309 USA

出　　处：《热科学与技术》2009年第2期101-105,共5页Journal of Thermal Science and Technology

基　　金：国家自然科学基金资助项目(50776006);中国博士后科学基金资助项目(20070420295)

摘　　要：扩散层作为质子交换膜燃料电池的一个重要组成部分,对电池性能有着极大的影响。将碳纸扩散层从电池单体中独立出来,针对液态水在碳纸多孔介质中的传输进行了可视化的实验研究,同时将三种流场板对排水性能的影响进行了比较。实验结果表明:碳纸的平均孔径对液态水穿透有着重要影响;蛇型流道更有利于液态水从电池中排出。As an important component of PEMFC, gas diffuse layer（GDL） has a great impact on the performance of PEMFC. The GDL was separated from the fuel cell in the current study and a visible experiment was carried out to get the knowledge of water transport in GDL. At the same time, the drainage performances of three kind of different bipolar plates were compared. According to the experimental result, the average diameter of porous of GDL was found to be the key for the penetrating pressure; Serpentine flow channel was proved as the best pattern for drainage.

关 键 词：质子交换膜燃料电池 扩散层 可视化实验 

分 类 号：TK91[动力工程及工程热物理]