大面积质子交换膜燃料电池平行流场优化设计  

Optimization Design of Flow Field Configuration for a Large-scale Hydrogen Polymer Electrolyte Membrane Fuel Cell

作　　者：王誉霖 张晓剑 管超 宋娇娇 何为 WANG Yulin;ZHANG Xiaojian;GUAN Chao;SONG Jiaojiao;HE Wei(Tianjin Key Lab of Refrigeration Technology,Tianjin University of Commerce,Tianjin 300134,China;Key Laboratory of Advanced Fuel Cells and Electrolyzers Technology of Zhejiang Province,Ningbo 315200,China;Ningbo Institute of Material Technology and Engineering,Chinese Academy of Sciences,Ningbo 315200,China;Key Lab of Agricultural Products Low carbon Cold Chain of Ministry of Agriculture and Rural Affairs,Tianjin 300134,China)

机构地区：[1]天津商业大学制冷技术重点实验室,天津300134 [2]浙江省先进燃料电池与电解池技术重点实验室,宁波315200 [3]中国科学院宁波材料技术与工程研究所,宁波315200 [4]农业农村部农产品低碳冷链重点实验室,天津300134

出　　处：《工程热物理学报》2025年第3期975-981,共7页Journal of Engineering Thermophysics

基　　金：国家重点研发计划项目(No.2022YFE0207600);天津市杰出青年基金项目(No.23ICIOIC00290);国家自然科学基金项目(No.52176084);清华大学智能绿色车辆与交通全国重点实验室开放课题项目(No.KFY2403)。

摘　　要：质子交换膜燃料电池(PEMFC)生成的液态水如无法及时排出会引起“水淹”现象,进而阻碍反应气体的扩散传质,导致电池性能下降。流场结构是影响反应物和生成物输运特性的决定性因素之一。本研究通过三维两相PEMFC数值模型,对比分析了108 cm^(2)大面积传统和阴极流道具有渐扩设计的平行流场结构的PEMFC整体性能。研究发现,改进平行流场结构增强了液态水的排出性能,并且具有更均匀的电流密度和氧气分布,因此,提升了PEMFC的整体性能。与传统平行流场相比,改进平行流场最优结构设计方案的功率密度、电流密度均匀性和温度均匀性分别提高了2.31%、15.31%和8.82%。此外,通过熵权法进行综合评价,发现最优的改进平行流场结构设计方案将PEMFC整体性能的综合评价指标从0.057提高到0.309。If the liquid water generated in the proton exchange membrane fuel cell(PEMFC)cannot be discharged in time,it will cause“water flooding”,thus hindering the mass transfer of reactant gas and leading to the degradation of cell performance.Flow field configuration is one of the decisive factors influencing the transport properties of reactants and products.In this study,the overall performance of 108 cm^(2) large-scale PEMFCs with conventional parallel flow field configuration and modified parallel flow field configuration with divergent design are comparatively analyzed by a three-dimensional two-phase PEMFC numerical model.It is found that the modified parallel flow field configuration enhances the liquid water discharge performance and has a more uniform current density and oxygen distribution,thus enhancing the overall performance of the PEMFC.Compared with the conventional parallel flow field,the power density,current density uniformity,and temperature uniformity of the optimal modified parallel flow field design are improved by 2.31%,15.31%,and 8.82%,respectively.In addition,a comprehensive evaluation by the entropy weighting method reveals that the optimal modified parallel flow field design improves the comprehensive evaluation index from 0.057 to 0.309.

关 键 词：质子交换膜燃料电池 大面积改进平行流场 渐扩设计 熵权法 电池性能 

分 类 号：TK91[动力工程及工程热物理]