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首页> 外文期刊>Journal of power sources >Two-phase flow pressure drop hysteresis in an operating proton exchange membrane fuel cell
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Two-phase flow pressure drop hysteresis in an operating proton exchange membrane fuel cell

机译：运行中的质子交换膜燃料电池中的两相流压降滞后

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摘要

Two-phase flow pressure drop hysteresis was studied in an operating PEM fuel cell. The variables studied include air stoichiometry (1.5,2,3,4), temperature (50,75,90 ℃), and the inclusion of a microporous layer. The cathode channel pressure drops can differ in PEM fuel cells when the current density is increased along a path and then decreased along the same path (pressure drop hysteresis). Generally, the descending pressure drop is greater than the ascending pressure drop at low current densities (<200mAcm~(-2)), and the effect is worse at low stoichiometries and low temperatures. The results show that the hysteresis occurs with or without the inclusion of a microporous layer. Initial results show a modified Lockhart-Martinelli approach seems to be able to predict the two-phase flow pressure drop during the ascending path. The results compare well with photographs taken from the cathode flow field channel of a visualization cell.
机译：在运行的PEM燃料电池中研究了两相流压降滞后现象。研究的变量包括空气化学计量比（1.5、2、3、4），温度（50、75、90℃）以及微孔层的夹杂物。当电流密度沿一条路径增加，然后沿同一路径减小时，阴极通道压降在PEM燃料电池中可能会有所不同（压降磁滞）。通常，在低电流密度（<200mAcm〜（-2））下，下降的压降大于上升的压降，并且在低化学计量比和低温下效果更差。结果表明，在包含或不包含微孔层的情况下都会发生磁滞现象。初步结果表明，改进的Lockhart-Martinelli方法似乎能够预测上升路径中的两相流压降。结果与从可视化单元的阴极流场通道拍摄的照片相比较。

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  • 来源
    《Journal of power sources》 |2011年第19期|p.8031-8040|共10页
  • 作者

    Ryan Anderson; David P. Wilkinson; Xiaotao Bi; L Zhang;

  • 作者单位

    Department of Chemical and Biological Engineering, University of British Columbia, 2360 East Mall Vancouver, BC, Canada V6T 1Z3,Clean Energy Research Centre, University of British Columbia, 2360 East Mall Vancouver, BC, Canada V6T1Z3;

    Department of Chemical and Biological Engineering, University of British Columbia, 2360 East Mall Vancouver, BC, Canada V6T 1Z3,Clean Energy Research Centre, University of British Columbia, 2360 East Mall Vancouver, BC, Canada V6T1Z3;

    Department of Chemical and Biological Engineering, University of British Columbia, 2360 East Mall Vancouver, BC, Canada V6T 1Z3,Clean Energy Research Centre, University of British Columbia, 2360 East Mall Vancouver, BC, Canada V6T1Z3;

    Department of Chemical and Biological Engineering, University of British Columbia, 2360 East Mall Vancouver, BC, Canada V6T 1Z3,Clean Energy Research Centre, University of British Columbia, 2360 East Mall Vancouver, BC, Canada V6T1Z3;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    two-phase flow; hysteresis; pem fuel cell; water management;

    机译：两相流磁滞Pem燃料电池;水管理;

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