Simulation of the Internal Transport Phenomena for PEM Fuel Cells with Different Modes of Flow  

作　　者：胡鸣若 朱新坚 顾安忠 

机构地区：[1]Institute of Fuel Cell, Institute of Refrigeration and Cryogenics, Shanghai Jiaotong University, Shanghai 200030, China [2]Institute of Fuel Cell, [3]Institute of Refrigeration and Cryogenics, Shanghai Jiaotong University, Shanghai 200030, China

出　　处：《Chinese Journal of Chemical Engineering》2004年第1期14-26,共13页中国化学工程学报（英文版）

基　　金：Supported by "985" Funds, Shanghai Jiaotong University, China.

摘　　要：A numerical model for proton exchange membrane (PEM) fuel cell is developed, which can simulate such basic transport phenomena as gas-liquid two-phase flow in a working fuel cell. Boundary conditions for both the conventional and the interdigitated modes of flow are presented on a three-dimensional basis. Numerical techniques for this model are discussed in detail. Validation shows good agreement between simulating results and experimental data. Furthermore, internal transport phenomena are discussed and compared for PEM fuel cells with conventional and interdigitated flows. It is found that the dead-ended structure of an interdigitated flow does increase the oxygen mass fraction and decrease the liquid water saturation in the gas diffusion layer as compared to the conventional mode of flow. However, the cathode humidification is important for an interdigitated flow to acquire better performance than a conventional flow fuel cell.A numerical model for proton exchange membrane (PEM) fuel cell is developed, which can simulate such basic transport phenomena as gas-liquid two-phase flow in a working fuel cell. Boundary conditions for both the conventional and the interdigitated modes of flow are presented on a three-dimensional basis. Numerical techniques for this model are discussed in detail. Validation shows good agreement between simulating results and experimental data. Furthermore, internal transport phenomena are discussed and compared for PEM fuel cells with conventional and interdigitated flows. It is found that the dead-ended structure of an interdigitated flow does increase the oxygen mass fraction and decrease the liquid water saturation in the gas diffusion layer as compared to the conventional mode of flow. However, the cathode humidification is important for an interdigitated flow to acquire better performance than a conventional flow fuel cell.

关 键 词：proton exchange membrane fuel cell numerical model liquid water saturation conventional flow interdigitated flow HUMIDIFICATION 

分 类 号：TQ019[化学工程]