交错布置蜿蜒流道的PEMFC冷启动特性  

Analysis of the Impact of Flow Field Arrangement on Subfreezing Temperature Cold Start of PEMFC With Zigzag-shaped Channels

作　　者：廖梓豪 魏琳 Ahmed Mohmed Dafalla 郭剑[2,3,4] 黄旭锐 蒋方明 LIAO Zihao;WEI Lin;Ahmed Mohmed Dafalla;GUO Jian;HUANG Xurui;JIANG Fangming(Guangzhou Power Supply Bureau,Guangdong Power Grid Co.,Ltd.Guangzhou 510600,China;Guangzhou Institute of Energy Conversion,Chinese Academy of Sciences,Guangzhou 510640,China;CAS Key Laboratory of Renewable Energy,Guangzhou 510640,China;Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development,Guangzhou 510640,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]广东电网有限责任公司广州供电局,广州510600 [2]中国科学院广州能源研究所,广州510640 [3]中国科学院可再生能源重点实验室,广州510640 [4]广东省新能源和可再生能源研究开发与应用重点实验室,广州510640 [5]中国科学院大学,北京100049

出　　处：《工程热物理学报》2023年第10期2798-2807,共10页Journal of Engineering Thermophysics

基　　金：国家自然科学基金(No.52006226);中国科学院与伊朗科技副总统办公室丝路科学基金联合研究资助项目(No.182344KYSB20210007);广州市科技计划项目(No.202102020356)。

摘　　要：质子交换膜燃料电池(PEMFC)在零下温度下的冷启动是影响其市场化的重要障碍。流场构型在一定程度上决定了反应物/生成物的输运,影响着PEMFC的冷启动性能。本研究利用PEMFC冷启动模型,分析了交错布置蜿蜒流道流场(ZFFCA)、蜿蜒流道平行流场(ZPFF)和直通道平行流场(SPFF)的冷启动特性。研究发现,ZFFCA能更好地分布PEMFC内的反应物/生成物、电流密度、热和冰,交错布置的形式更进一步强化了PEMFC的传热传质,有利于冷启动成功;但使用ZFFCA在冷启动过程中PEMFC温度爬升速率较低,不利于快速冷启动。The cold-start performance at sub-zero temperature of proton exchange membrane fuel cells(PEMFC)is crucial to its commercialization.As the flow field configuration determines the distribution of reactants and reaction products,this paper numerically investigates the effect of a zigzag flow field with a contrary anode/cathode arrangement(ZFFCA)during the cold-start process,while the zigzag parallel flow field(ZPFF)and straight parallel flow field(SPFF)designs are applied to comparison.The model predictions show that the ZFFCA fow field design provides more uniform distributions of reactants/product,temperature,ice,and current density compared to the SPFF and ZPFF designs.The ZFFCA configuration is found to further reduce the mass transport resistance of reactants and boost up the heat/mass transfer rates,which is benefitial to the cold start performance.However,the lower temperature climb-up rate in ZFFCA shows a detrimental effect to the rapid start-up of a PEMFC at sub-zero temperature.

关 键 词：PEM燃料电池 零下温度冷启动 数值仿真 流场构型 

分 类 号：TK91[动力工程及工程热物理] TM911.48[电气工程—电力电子与电力传动]