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    Performance of Parallel, Interdigitated, and Serpentine Flow Field PEM Fuel Cells with Straight or Wavelike Channels

    Source: Journal of Energy Engineering:;2020:;Volume ( 146 ):;issue: 005
    Author:
    Quan Ding
    ,
    Hong-Liang Zhao
    ,
    Zhong-Min Wan
    ,
    Yan-Ru Yang
    ,
    Chen Yang
    ,
    Xiao-Dong Wang
    DOI: 10.1061/(ASCE)EY.1943-7897.0000701
    Publisher: ASCE
    Abstract: This work used a three-dimensional, two-phase, and nonisothermal model to compare performances of proton exchange membrane (PEM) fuel cells with a parallel, interdigitated, or serpentine flow field when wavelike gas channels (GCs) are or not employed, to determine which flow field needs wavelike GCs more than the others. The comparisons showed that the performance enhancement is the most pronounced for the parallel flow field, whereas the enhancement was significantly reduced for the serpentine and interdigitated flow fields when wavelike GCs are adopted. For the parallel flow field, oxygen transport into the gas diffusion layer (GDL) and liquid water removal from the cathode porous electrode were enhanced remarkably by wavelike GCs. As a result, more oxygen was transported into the catalyst layer (CL) to participate in electrochemical reactions, leading to better cell performance. However, subrib convection in the interdigitated and serpentine flow fields weakened the role of wavelike GCs, so that the performance was not improved greatly for the two flow fields. The influence of the amplitude to wavelength ratio, aspect ratio of wavelike GCs, and cathode flow rate in the parallel flow field were investigated. The results show that the optimal amplitude to wavelength ratio is 0.6, which yields a 13.44% increase in the power density compared with straight GCs. The wavelike GCs had greater enhancement when small channel aspect ratios were employed or when the cell operated at larger cathode flow rates. The simulations provide useful guidance for practical PEM fuel cell flow field designs.
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      Performance of Parallel, Interdigitated, and Serpentine Flow Field PEM Fuel Cells with Straight or Wavelike Channels

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4268654
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    • Journal of Energy Engineering

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    contributor authorQuan Ding
    contributor authorHong-Liang Zhao
    contributor authorZhong-Min Wan
    contributor authorYan-Ru Yang
    contributor authorChen Yang
    contributor authorXiao-Dong Wang
    date accessioned2022-01-30T21:40:55Z
    date available2022-01-30T21:40:55Z
    date issued10/1/2020 12:00:00 AM
    identifier other%28ASCE%29EY.1943-7897.0000701.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4268654
    description abstractThis work used a three-dimensional, two-phase, and nonisothermal model to compare performances of proton exchange membrane (PEM) fuel cells with a parallel, interdigitated, or serpentine flow field when wavelike gas channels (GCs) are or not employed, to determine which flow field needs wavelike GCs more than the others. The comparisons showed that the performance enhancement is the most pronounced for the parallel flow field, whereas the enhancement was significantly reduced for the serpentine and interdigitated flow fields when wavelike GCs are adopted. For the parallel flow field, oxygen transport into the gas diffusion layer (GDL) and liquid water removal from the cathode porous electrode were enhanced remarkably by wavelike GCs. As a result, more oxygen was transported into the catalyst layer (CL) to participate in electrochemical reactions, leading to better cell performance. However, subrib convection in the interdigitated and serpentine flow fields weakened the role of wavelike GCs, so that the performance was not improved greatly for the two flow fields. The influence of the amplitude to wavelength ratio, aspect ratio of wavelike GCs, and cathode flow rate in the parallel flow field were investigated. The results show that the optimal amplitude to wavelength ratio is 0.6, which yields a 13.44% increase in the power density compared with straight GCs. The wavelike GCs had greater enhancement when small channel aspect ratios were employed or when the cell operated at larger cathode flow rates. The simulations provide useful guidance for practical PEM fuel cell flow field designs.
    publisherASCE
    titlePerformance of Parallel, Interdigitated, and Serpentine Flow Field PEM Fuel Cells with Straight or Wavelike Channels
    typeJournal Paper
    journal volume146
    journal issue5
    journal titleJournal of Energy Engineering
    identifier doi10.1061/(ASCE)EY.1943-7897.0000701
    page14
    treeJournal of Energy Engineering:;2020:;Volume ( 146 ):;issue: 005
    contenttypeFulltext
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