基于相场法的质子交换膜电解水阳极扩散层两相流研究  

Study on Two-Phase Flow in Anode Diffusion Layer of Proton Exchange Membrane Water Electrolysis Based on the Phase Field Method

作　　者：王志明 赵培羽 张自明 王铁营 郭浩 刘圣春[1] 徐超[2] 胡开永[1] WANG Zhiming;ZHAO Peiyu;ZHANG Ziming;WANG Tieying;GUO Hao;LIU Shengchun;XU Chao;HU Kaiyong(Tianjin Key Laboratory of Refrigeration Technology,Tianjin University of Commerce,Tianjin 300134,China;School of Energy Power and Mechanical Engineering,North China Electric Power University,Beijing 102206,China)

机构地区：[1]天津市制冷技术重点实验室,天津商业大学,天津300134 [2]华北电力大学能源动力与机械工程学院,北京102206

出　　处：《工程热物理学报》2025年第2期603-609,共7页Journal of Engineering Thermophysics

基　　金：国家自然科学基金(No.52206274,No.52206205);天津市自然科学基金重点基金(No.23JCZDJC00250);大学生创新创业训练项目(No.202210069106)。

摘　　要：本文基于相场法通过COMSOL软件建立了质子交换膜电解水阳极扩散层两相流动的二维瞬态模型,详细分析了氧气在扩散层两相流动中的运动状态,同时研究了液态水流速、接触角、表面张力等参数的影响。结果表明,液态水流速的改变不影响多孔传输层中氧气输运路径,但影响气泡脱离多孔传输层及气泡到达出口的时间;接触角对流域内氧气的输运具有双重作用;减小表面张力有利于氧气突破限制孔喉,能够使催化层产生的氧气尽快离开扩散层,有效地提高电池性能。In this paper,a two-dimensional transient model of the two-phase flow in the anode diffusion layer of proton exchange membrane water electrolysis was established based on the phase field method by COMSOL software.The motion state of oxygen in the diffusion layer was analyzed in detail,and the effects of liquid water flow rate,contact angle,and surface tension were investigated.The results show that the change of liquid water flow rate does not affect the oxygen transport pathway in the porous transport layer,but affects the time for the bubbles to leave the porous transport layer and reach the exit.The contact angle has a dual effect on the oxygen transport in the computational domain.Reducing surface tension is conducive to break through the limiting throat,which can make the oxygen generated in the catalyst layer leave the diffusion layer quickly,and improve the performance of electrolytic cell effectively.

关 键 词：质子交换膜电解水 阳极扩散层 相场法 氧气 两相流动 

分 类 号：TK91[动力工程及工程热物理]