Evaluating Breakthrough Pressure in Gas Diffusion Layers of Proton Exchange Membrane Fuel Cells  

作　　者：Ma Yue Jia Li Zhang Zhuqian Wang Xia 

机构地区：[1]School of Mechanical and Electroriic Control Engineering, Beijing Jiaotong University, Beijing 100044, China [2]Department of Mechanical Engineering, Oakland University, Rochester, MI 48309, USA

出　　处：《Journal of Thermal Science》2010年第5期459-464,共6页热科学学报（英文版）

基　　金：the National Natural Science Foundation of China (No.50776006,No.50976011)

摘　　要：This paper studied the breakthrough pressure for liquid water to penetrate the gas diffusion layer(GDL) of a proton exchange membrane fuel cell(PEMFC).An ex-situ testing was conducted on a transparent test cell to visualize the water droplet formation and detachment on the surface of different types of GDLs through a CCD camera.The breakthrough pressure,at which the liquid water penetrates the GDL and starts to form a droplet,was measured.The breakthrough pressure was found to be different for the GDLs with different porosities and thicknesses.The equilibrium pressure,which is defined as the minimum pressure required maintaining a constant flow through the GDL,was also recorded.The equilibrium pressure was found to be much lower than the breakthrough pressure for the same type of GDL.A pore network model was modified to further study the relationship between the breakthrough pressure and the GDL properties and thicknesses.The breakthrough pressure increases for the thick GDL with smaller micro-pore size.

关 键 词：PEMFC Gas diffusion layer VISUALIZATION Network model 

分 类 号：TM911.4[电气工程—电力电子与电力传动] TE39[石油与天然气工程—油气田开发工程]