质子交换膜燃料电池
传质
传质系数
机械
流量(数学)
化学
扩散
功率密度
材料科学
热力学
膜
功率(物理)
色谱法
物理
生物化学
作者
Xinning Zhu,Rongkang Liu,Shan Liang,Xi Wang,Xia Chu,Yanwei Ma,Linjing Wu,Gyung-Ho Song,Wei Zhou
出处
期刊:Energy
[Elsevier]
日期:2023-10-01
卷期号:: 129360-129360
标识
DOI:10.1016/j.energy.2023.129360
摘要
As one of the critical components of the proton exchange membrane fuel cell (PEMFC), the flow channel design in the bipolar plate is crucial to improve the mass transfer performance and stability. In this study, the effect of the structural characteristics and location arrangement of traveling wave flow channels, with a concave surface as the mass transfer surface, on the fuel cell performance is investigated, and the evaluation indexes, such as oxygen mass flux, net power density, synergistic coefficient, and unevenness coefficient, are established to evaluate the flow law of fluid, distribution law of pressure, synergistic mass transfer, and performance stability of the fuel cell. Results show that the synergistic mass transfer performance is better in the traveling wave channels with identical structural characteristics and uniform arrangement. Furthermore, a 21.20 % increase in the average fluid flow velocity can enhance oxygen and liquid water flux at the bipolar plate (BP)/gas diffusion layer (GDL) interfaces by about 198.48 % and 207.94 %, respectively, resulting in an 87.13 % increase in net power density and 70.95 % improvement in the performance stability of the fuel cell.
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