水平挡板流场对燃料电池性能与传质的影响  

Effect of flow fields with horizontal baffle on performance and mass transport of fuel cells

作　　者：蔡永华[1,2,3,4] 罗子贤 胡健平 CAI Yonghua;LUO Zixian;HU Jianping(Hubei Key Laboratory of Advanced Technology for Automotive Components,Wuhan University of Technology,Wuhan,Hubei 430070,China;Hubei Collaborative Innovation Center for Automotive Components Technology,Wuhan,Hubei 430070,China;Hubei Technology Research Center of New Energy and Intelligent Connected Vehicle Engineering,Wuhan,Hubei 430070,China;School of Automotive Engineering,Wuhan University of Technology,Wuhan,Hubei 430070,China)

机构地区：[1]武汉理工大学现代汽车零部件技术湖北省重点实验室,湖北武汉430070 [2]汽车零部件技术湖北省协同创新中心,湖北武汉430070 [3]新能源与智能网联车湖北省工程技术研究中心,湖北武汉430070 [4]武汉理工大学汽车工程学院,湖北武汉430070

出　　处：《电池》2024年第3期303-308,共6页Battery Bimonthly

基　　金：国家自然科学基金面上项目(52176200)。

摘　　要：在质子交换膜燃料电池(PEMFC)流道内设置微结构,可增强反应气体从流道到催化层的传质能力,并提高电池性能。建立并对比交错安装挡板与对置安装挡板的模型,得出交错安装的布置方式,更有利于电池性能的提升。建立4种不同堵塞率的模型,发现随着堵塞率的升高,电池的最大净功率密度和极限电流密度增大,95%堵塞率模型的净功率密度最高,为1.053 W/cm^(2),较无挡板模型提升了14.58%,直至电流密度2.8 A/cm^(2)时,仍未出现明显的浓差极化。调整挡板夹角,综合考虑传质能力和泵送损失情况下,夹角为15°时,电池净功率密度最高。Incorporating microstructures within the flow channels of proton exchange membrane fuel cell(PEMFC)can enhance mass transport capability from channels to the catalyst layer and improve cell performance.The model with installation of staggered baffles and opposing baffles is established,it is concluded that the staggered arrangement is more favorable for enhancing cell performance.Models with four different kinds of blockage ratio are created,it is found that as the blockage ratio increases,both the maximum net power density and the limiting current density of the cell increase.The net power density of the 95%blockage ratio model is the highest,at 1.053 W/cm^(2),which represents a 14.58%increase compared to the model without baffles.No significant concentration polarization is observed up to a current density of 2.8 A/cm^(2).By varying the baffle angle,the highest net power density of the cell is achieved when the angle is 15°,considering a balance between mass transport capability and pumping losses.

关 键 词：质子交换膜燃料电池(PEMFC) 微结构 阴极流道 挡板 净功率密度 布置方式 堵塞率 夹角 

分 类 号：TM911.42[电气工程—电力电子与电力传动]