PEM燃料电池变径流道设计与仿真  

Design and Simulation of PEM Fuel Cell Reduced Channel

作　　者：梁修汪 方存光[1] Liang Xiu-wang;Fang Cun-guang(School of Automotive and Transportation,Shenyang University of Science and Technology,Liaoning Shenyang 110159)

机构地区：[1]沈阳理工大学汽车与交通学院,辽宁沈阳110159

出　　处：《内燃机与配件》2023年第13期22-24,共3页Internal Combustion Engine & Parts

摘　　要：优化质子交换膜燃料电池(Proton Exchange Membrane Fuel Cell,PEMFC)流场是强化电池物质传递、分布和提升输出性能的有效途径。通过建立新型流道模型,研究变径结构对阴极气体传质和电流密度的影响。结构表明,该变径流道能够明显提高流道出口附近区域的气体流速;流道内入口于出口间压差增大,有利于提高反应气体传递;强化了反应气体在流道于扩散层中的传质,能够提高O 2在扩散层中的质量分数及O 2的分布均匀性;改善了流道的排水性,降低催化界面水的质量分数;提升了反应界面整体电流密度,电流密度分布更加均匀。Optimizing the internal flow field of Proton Exchange Membrane Fuel Cell(PEMFC)is an effective way to strengthen the material transfer and distribution of the cell and improve the output performance.The influence of the reduced diameter structure on the gas mass transfer and current density of the cathode was studied by establishing a new Flow channel design model.The structure shows that the reduced flow channel can obviously increase the gas velocity near the outlet of the flow channel.The increase of pressure difference between inlet and outlet in the flow passage is beneficial to improve the transfer of reaction gas.The mass transfer of reactive gas in the diffusion layer is enhanced,which can improve the mass fraction of O 2 in the diffusion layer and the distribution uniformity of O 2.The water drainage of the flow passage is improved and the mass fraction of water at the catalytic interface is reduced.The overall current density of the reaction interface is improved,and the current density distribution is more uniform.

关 键 词：质子交换膜燃料电池 流道设计 电流密度 

分 类 号：TM911.4[电气工程—电力电子与电力传动]