阴极挡板排列对PEMFC反应物输运和性能的影响  

Effect of Cathode Baffle Arrangement on PEMFC Reactant Transport and Performance

作　　者：储旭 郭雪岩[1] CHU Xu;GUO Xueyan(School of Energy and Power Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]上海理工大学能源与动力工程学院,上海200093

出　　处：《动力工程学报》2023年第3期359-364,379,共7页Journal of Chinese Society of Power Engineering

摘　　要：为了改善质子交换膜燃料电池(PEMFC)的性能,采用流道内使用挡板堵塞的方法,以增强反应气体向催化层的传质。建立了一个三维、两相、稳态的PEMFC数值模型,研究了凸字排布、顺排和逆排这3种不同阴极流道挡板的排布方式对PEMFC性能的影响,并与无挡板常规流场进行对比,然后在最佳排布方式的基础上研究了挡板形状(矩形、梯形和半圆形)对PEMFC性能的影响。结果表明:PEMFC阴极流道挡板顺排性能最好,相较于无挡板常规流道,净功率提升了14.3%;使用梯形挡板的PEMFC性能最好,相较于无挡板常规流道,净功率提高了16.4%。To improve the performance of the proton exchange membrane fuel cell(PEMFC),the baffles were installed in the gas channels to enhance the species transport from the reaction gas to the catalytic layer.A three-dimensional,two-phase and steady PEMFC numerical model was established and three baffle arrangements were selected,which were"high to low"arrangement,"low to high to low"arrangement and"low to high"arrangement.The effects of three different baffle arrangements in the cathode side flow channel on the performance of PEMFC were studied and compared with those of the unbaffled flow channel case.Then based on the optimum arrangement of baffles,the effects of three baffle shapes(rectangular,trapezoidal and semicircular)on the performance of PEMFC were studied.Results show that the"low to high"arrangement in the cathode side flow channel has the best performance because its net power is increased by 14.3%when compared with the flow field of the unbaffled channel.Among three simulated baffle shapes,the performance of the trapezoidal baffle is the best,achieving an increase of 16.4%in net power compared with that of the unbaffled channel case.

关 键 词：质子交换膜燃料电池 阴极挡板 排布方式 数值模拟 

分 类 号：TM911.42[电气工程—电力电子与电力传动]