PEM电解槽流场的多物理场耦合建模与分析  

Multi-physics coupling modeling and analysis of flow field in PEM electrolyzer

作　　者：童灵华 孙雷波 应芳义 姚剑琪 叶夏明 谢长君[3] TONG Linghua;SUN Leibo;YING Fangyi;YAO Jianqi;YE Xiaming;XIE Changjun(State Grid Zhejiang Cixi Electric Power Supply Co.,Ltd.,Cixi 315300,China;State Grid Zhejiang Electric Power Co.,Ltd.,Ningbo Electric Power Supply Company,Ningbo 315100,China;School of Automation,Wuhan University of Technology,Wuhan 430070,China)

机构地区：[1]国网浙江慈溪市供电有限公司,浙江慈溪315300 [2]国网浙江省电力有限公司宁波供电公司,浙江宁波315100 [3]武汉理工大学自动化学院,武汉430070

出　　处：《重庆理工大学学报（自然科学）》2023年第10期303-311,共9页Journal of Chongqing University of Technology：Natural Science

基　　金：宁波永耀电力投资集团有限公司科技项目(KJCX040);国家重点研发计划项目(2020YFB1506802)。

摘　　要：基于传热、传质和电化学动力学等多物理场耦合理论,建立PEMWE单电池三维模型,研究流场结构对PEMWE性能的影响。对比分析了4种流场结构电解槽内流体流速、物质分布和极化曲线的情况。研究结果表明:在相同的操作条件下,叶栅形流场PEMWE的槽内物质流速和压力分布更加均匀,电化学反应更加充分,而传统的平行流场结构电化学性能较差;在80℃、0.1 MPa的工作条件下,叶栅形流场PEMWE的极化电压更低,当电流密度为2 A/cm^(2)时,单电池极化电压仅为1.686 V,表明采用叶栅形流场结构相较其余几种方式能更有效地提升PEMWE单电池的性能。Proton Exchange Membrane Water Electrolyzer(PEMWE)is becoming one of the mainstream hydrogen production carriers with the characteristics of high flexibility and high current density.PEMWE internal physical structure is complex,and the flow field of different form had obvious effects on the electrochemical properties.Therefore,based on the coupling theory of multiple physical fields such as heat transfer,mass transfer,and electrochemical kinetics,a 3D model of PEMWE single cell was established to study the influence of flow field structure on PEMWE performance.The fluid velocity,material distribution and polarization curve of four kinds of flow field structures were compared and analyzed.The results show that under the same operating conditions,the material flow velocity and pressure distribution in the groove of cascade flow field PEMWE are more uniform,and the electrochemical reaction is more sufficient,while the electrochemical performance of traditional parallel flow field structure is poor.In addition,under the working condition of 80℃and 0.1 MPa,the polarization voltage of cascade flow field PEMWE is lower,and the polarization voltage of single cell is only 1.686 V when the current density is 2 A/cm^(2).Therefore,compared with the other methods,the cascade flow structure can effectively improve the PEMWE single cell performance.

关 键 词：质子交换膜水电解槽 多物理场耦合 三维建模 流场 

分 类 号：TK91[动力工程及工程热物理]