质子交换膜燃料电池
矩形
传质
材料科学
机械
压力降
传质系数
频道(广播)
工作(物理)
热力学
膜
计算机科学
物理
化学
几何学
数学
生物化学
计算机网络
作者
Jun Shen,Lingping Zeng,Zhichun Liu,Wei Liu
标识
DOI:10.1007/s00231-018-2473-5
摘要
This work, using three-dimension proton exchange membrane fuel cell (PEMFC) model combined with theoretical analysis, is mainly to improve the performance of PEMFC through optimizations of fuel cell structure, adding rectangle blockages in the gas channel. Performance comparison, velocity distribution, interface reactant concentration difference, and pressure drop have been studied in the paper. The result shows that, longitudinal vortices would appear and the performance could be improved with the addition of blockages in the gas channel, especially at high current density with closer arrangement. According to field synergy principle, average mass transfer synergy angle could prove the superiority of optimized structure in the ability of mass transfer. Besides, a novel physical quantity, effective mass transfer coefficient, has been proposed. The effective mass transfer coefficient, is the ability of mass transfer in the direction of electrochemical reaction in PEMFC, which could also give mechanism explanation for the performance improvement.
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