PEM水电解池渐变型流场结构的传质和性能研究  

STUDY ON MASS TRANSFER AND PERFORMANCE OF GRADUAL FLOW FIELD STRUCTURE IN PEM ELECTROLYSIS CELLS

作　　者：孙聪 时焕岗 渠吉发 于洋 熊永恒 谭文轶 Sun Cong;Shi Huan’gang;Qu Jifa;Yu Yang;Xiong Yongheng;Tan Wenyi(School of Mechanical Engineering,Nanjing Institute of Technology,Nanjing 211167,China;International Joint Laboratory of Green&Low Carbon Development of Jiangsu Province,Nanjing 211167,China)

机构地区：[1]南京工程学院机械工程学院,南京211167 [2]江苏省绿色低碳发展国际合作联合实验室,南京211167

出　　处：《太阳能学报》2024年第10期22-29,共8页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金面上项目(51678291);江苏省高等学校基础科学研究重大项目(23KJA610003)。

摘　　要：传统质子交换膜(PEM)水电解池的平行、蛇形等流场由于传质不佳导致电性能下降。针对于此,该研究提出一种渐变型流场,通过数值模拟的方法,比较正、反向进水(分别记作渐变Ⅰ型、渐变Ⅱ型)两个条件下,流场内流速、压力、气体分布以及电流密度分布变化,并与平行、蛇形流场对比。结果表明,渐变Ⅰ型流场的压降仅次于平行流场,具有较高的流速且也能够有效快速排出气体,平均电流密度高于蛇形流场8%,高于平行流场4%。采用渐变Ⅰ型流场的质子交换膜水电解池具有更优的电性能。The parallel and serpentine flow fields of the traditional proton exchange membrane(PEM)electrolysis cells have poor electrical performance,due to weak mass transfer.In view of this,this paper proposed a gradually-varied flow field.The changes of flow velocity,pressure,gas distribution and current density distribution in the flow field under different inflow directions(denoted as gradualⅠ-type and gradualⅡ-type,respectively)were compared by numerical simulation.The results show that the pressure drop of the gradualⅠ-type flow field is second only to the parallel flow field,which has a higher flow velocity and can also effectively and rapidly discharge gas.The average current density achieved by gradualⅠ-type flow field is 8%higher than that of the serpentine and 4%higher than that of the parallel.The PEM electrolysis cells with gradualⅠ-type flow field has better electrical performance.

关 键 词：制氢 电解池 数值模拟 流场 传质 

分 类 号：TM911[电气工程—电力电子与电力传动]