摘要
为解决质子交换膜燃料电池(proton exchange membrane fuel cells,PEMFC)反应区流道燃料分配不均匀性,采用计算流体力学方法对流道燃料流动进行仿真,采用变异系数对不同方案进行评价,研究过渡区中圆柱体积占比、圆柱排列方式、圆柱到流道距离、过渡区圆柱开孔率对燃料分配均匀性的影响。结果表明:采用圆柱导流的燃料分配均匀性优于导流道导流;过渡区圆柱采用正方形排列时燃料分配均匀性最佳;增加圆柱到流道的距离,各流道燃料分配均匀性呈现先升高后下降的趋势,距离为3 mm时均匀性较好;过渡区开孔率约为11.4%时燃料分配均匀性较好,过大过小都会造成分配均匀性恶化。
To solve the problem of uneven fuel distribution in the reaction zone flow channel of proton exchange membrane fuel cells(PEMFC),computational fluid dynamics method is used to simulate the fuel flow in the flow channel.The coefficient of variation is used to evaluate different schemes,and the effects of cylinder volume ratio,cylinder arrangement,cylinder to channel distance,and cylinder porosity on fuel distribution uniformity in the transition zone are studied.The research results indicate that the fuel distribution uniformity using cylindrical flow guide is better than that using flow guide channels.The transition zone cylinders are arranged in a square shape for optimal distribution uniformity.By increasing the distance between the cylinder and the flow channel,the fuel distribution uniformity in each channel shows a trend of first increasing and then decreasing.The uniformity is better when the distance is 3 mm.When the porosity of the transition zone is about 11.4%,the fuel distribution uniformity is better.Both too large and too small can cause a deterioration of the distribution uniformity.
作者
赵明
李国祥
王桂华
白书战
ZHAO Ming;LI Guoxiang;WANG Guihua;BAI Shuzhan(School of Energy and Power Engineering,Shandong University,Jinan 250061,China)
出处
《内燃机与动力装置》
2024年第2期11-18,27,共9页
Internal Combustion Engine & Powerplant
基金
山东省重点研发计划项目资助(2020CXGC010404)。
关键词
PEMFC
极板
数值模拟
流场设计
性能优化
PEMFC
electrode plate
numerical simulation
flow field design
performance optimization
