流道对ab-PBI膜高温燃料电池阴极传质的影响  

Effects of the Flow Field on Mass Transfer in the Cathode of ab-PBI Fuel Cell

作　　者：孙红[1] 谢忱[1] 王君尧 闫冬[1] 肖健宇[2] 

机构地区：[1]沈阳建筑大学交通工程学院,辽宁沈阳110168 [2]中南大学信息科学与工程学院,湖南长沙410083

出　　处：《沈阳建筑大学学报（自然科学版）》2016年第2期315-321,共7页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家自然科学基金项目(51176131;51476107)

摘　　要：目的研究高温质子交换膜燃料电池的流道深度及其宽度对于提高其性能的影响.方法建立了一个二维、单相、稳态数学模型模拟研究高温质子交换膜燃料电池阴极氧气和水蒸气分布规律,分析流道深度及宽度对电池阴极中氧气、水蒸气浓度分布的影响.结果在高温质子交换膜燃料电池阴极中,氧气浓度沿着流道方向降低,而水分浓度则升高;从催化剂层到扩散层,氧气浓度升高,而水分浓度降低.在一定范围内增大流道深度,电池阴极催化剂层和扩散层内氧气浓度越大,水分浓度越小.在一定范围内增大流道宽度,电池阴极扩散层和催化剂层内氧气浓度越小,水分浓度越大.结论在一定范围内降低流道的深度和增大流道的宽度有利于氧气的传输与充分反应,可以提高高温质子交换膜燃料电池的性能.研究结果对高温质子交换膜燃料电池的流场结构参数的优化具有重要参考价值.Catalyst layer and diffusion layer are important components of high temperature proton exchange membrane fuel cell,and the mass transfer has an important influence on the performance of the cell. A two-dimensional,single phase,the steady state mathematical model was established in this paper to simulate cathode oxygen and water vapor distribution in high temperature proton exchange membrane fuel cell,analysis effects of flowchannel depth and width on cathode oxygen,water vapor concentration. The simulation results showed that the performance of high temperature proton exchange membrane fuel cell were improved by reducing the channel depth and increasing the flowchannel width in a certain range to accelerate the transport of oxygen and full reaction.The research results have important reference value for the optimization of the structure parametersof the high temperature proton exchange membrane fuel cell.

关 键 词：质子交换膜 燃料电池 数学模型 流道 

分 类 号：TM911.4[电气工程—电力电子与电力传动]