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质子交换膜燃料电池不同流场结构的分布特性研究

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流场结构是影响质子交换膜燃料电池(PEMFC)性能以及特性参数分布的重要因素.了解PEMFC内各种特性的分布是提高电池性能、稳定性和耐用性的先决条件.因此,有必要充分了解燃料电池中的性能参数分布特性.利用数值模拟与仿真研究了平行、单蛇形和三蛇形流场的电池性能差异,对比了三种流场对燃料电池分布特性的影响,并使用一种新颖的标准——阻抗分布,来评估流场结构对性能均匀性的影响.结果表明,采用蛇形流场的燃料电池极化曲线性能优于平行流场.通过分析电流密度、阻抗和温度分布,得出平行流场均匀性更好的结论,三蛇形流场则兼顾了单蛇形和平行流场的优点.通过引入均匀度参数(标准差)来描述特性参数分布的均匀性,平行、单蛇形和多蛇形流场的阻抗分布均匀度参数分别为0.235、0.305和0.245Ω·cm2.
Study on the distribution characteristics of different flow field structures of proton exchange membrane fuel cells
The flow field structure is an important factor affecting the performance and characteristic parameter distribution of proton exchange membrane fuel cell(PEMFC).Understanding the distribu-tion of various characteristics within PEMFC is a prerequisite for improving battery performance,stability and durability.Therefore,it is necessary to fully understand the distribution of performance parameters in fuel cells.In this paper,the differences in the performance of parallel,single and triple snake flow fields are studied by numerical simulation and simulation.The effects of the three flow fields on the distribution characteristics of fuel cells are compared.A novel criterion,impedance dis-tribution,is used to evaluate the influence of the flow field structure on the performance uniformity.The results show that the polarization curve performance of fuel cell with serpentine flow field is bet-ter than that of parallel flow field.Then,by analyzing the current density,impedance and tempera-ture distribution,we get the conclusion that the parallel flow field has better uniformity,and the three serpentine flow field takes into account the advantages of single serpentine and parallel flow field.By introducing the uniformity parameter(standard deviation)to describe the uniformity of characteristic parameter distribution,the impedance distribution uniformity parameters of parallel,single and multi-snake flow fields are 0.235,0.305 and 0.245 Ω·cm2,respectively.

proton exchange membrane fuel cellflow field structurenumerical simulationhomoge-neity research

詹昕、宋微、丁峰、邵志刚

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中国科学院大连化学物理研究所,辽宁大连 116023

中国科学院大学,北京 100049

中国科技大学,安徽 合肥 230026

质子交换膜燃料电池 流场结构 数值模拟 均匀性研究

2025

电源技术
中国电子科技集团第十八研究所

电源技术

北大核心
影响因子:0.329
ISSN:1002-087X
年,卷(期):2025.49(1)