质子交换膜燃料电池
压力降
机械
材料科学
功率密度
工作(物理)
流量(数学)
扩散
两相流
热力学
化学
功率(物理)
燃料电池
化学工程
工程类
物理
作者
Seyed Ali Atyabi,Ebrahim Afshari,Elnaz Zohravi,Chinonyelum Udemu
出处
期刊:Energy
[Elsevier]
日期:2021-11-01
卷期号:234: 121247-121247
被引量:48
标识
DOI:10.1016/j.energy.2021.121247
摘要
A suitable cooling flow field design for proton exchange membrane fuel cell (PEMFC) improves the cell's net generated power, besides achieving steady cell performance and a longer lifespan. The innovation in this work lies in the simultaneous simulation of electrochemical and cooling models while accounting for both thermal and electrical contact resistance between the gas diffusion layer and bipolar plates. In this study, flow field designs including straight parallel channels (Case A), straight parallel channels filled with metal foam (Case B), multi-channel serpentine (Case C), novel serpentine channels (Case D), and integrated metal foam (Case E) used for both gas channels and cooling channels are numerically simulated. Results show that the highest uniformity of temperature in the catalyst layer-gas diffusion layer interface is obtained in Case D, which has the largest pressure drop compared to Cases B, C, and E. However, due to the uniform distribution of reactant flows, the maximum temperature observed in the catalyst layer of this flow field was the lowest compared to the rest of the cases. Furthermore, the maximum power density of 0.75 Wcm−2 was observed in Case D at a corresponding voltage of 0.6 V, which reduced when the effect of high pressure drop was taken into account. Following the conclusion of the simulation and analysis, Case D displayed the best cooling performance while Case E produced the maximum net power output.
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