摘要
质子交换膜燃料电池(PEMFC)流道结构主要影响气体流动、扩散和电化学反应。通过建立金字塔状流道挡板的PEMFC三维模型并进行数值模拟,探讨不同金字塔状挡板比率和挡板数量对燃料电池传质特性和输出性能的影响。结果表明:在流道内增添金字塔状挡板与无挡板流道相比,最大可提高气体垂直速度分量93.7%,进而提升气体由流道向催化层的传输性能;在金字塔状挡板比率为0.25,挡板数量为1时,燃料电池净功率最高可达到0.107 W。此外,增大挡板比率和增多挡板数量均可持续提高传质性能,但流道压降同时也会有最大18.5%的上升,使得PEMFC输出性能下降。
The flow channel structure of a proton exchange membrane fuel cell(PEMFC)has a significant impact on gas flow,diffusion and electrochemical reaction.By building the proposed three-dimensional PEMFC model of a pyramid-shaped baffle and running numerical simulations,the effects of different pyramid baffle ratios and baffle numbers on mass transfer and output performance of fuel cells were investigated.The results show that incorporating a pyramid baffle into the flow path can increase the vertical velocity component of the gas by up to 93.7%when compared to a flow path without baffle,thereby improving gas transfer performance from the flow path to the catalytic layer.When the pyramid baffle ratio is 0.25 and the number of baffles is 1,the net power of the fuel cell can reach a maximum of 0.107 W.Furthermore,increasing the baffle ratio and number of baffles can continuously improve mass transfer performance,but the flow path pressure drop can increase by up to 18.5%,which will reduce PEMFC output performance.
作者
王耀琛
任洪娟
WANG Yaochen;REN Hongjuan(School of Mechanical and Automotive Engineering,Shanghai University of Engineering Science,Shanghai 201620,China)
出处
《上海工程技术大学学报》
CAS
2024年第1期30-37,共8页
Journal of Shanghai University of Engineering Science
关键词
质子交换膜燃料电池
金字塔状挡板
质量传递
压降
净功率
proton exchange membrane fuel cell(PEMFC)
pyramid baffle
mass transfer
pressure drop
net power
