首页|PEM水电解池渐变型流场结构的传质和性能研究

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

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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 gradual Ⅱ-type,respectively)were compared by numerical simulation.The results show that the pressure drop of the gradual Ⅰ-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 gradual Ⅰ-type flow field is 8%higher than that of the serpentine and 4%higher than that of the parallel.The PEM electrolysis cells with gradual Ⅰ-type flow field has better electrical performance.

hydrogen productionelectrolytic cellsnumerical simulationflow fieldsmass transfer

孙聪、时焕岗、渠吉发、于洋、熊永恒、谭文轶

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南京工程学院机械工程学院,南京 211167

江苏省绿色低碳发展国际合作联合实验室,南京 211167

制氢 电解池 数值模拟 流场 传质

国家自然科学基金面上项目江苏省高等学校基础科学研究重大项目

5167829123KJA610003

2024

太阳能学报
中国可再生能源学会

太阳能学报

CSTPCD北大核心
影响因子:0.392
ISSN:0254-0096
年,卷(期):2024.45(10)