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首页> 外文会议>Batteries and energy technology (General) - 217th ECS meeting >Two-Phase Flow Pressure Drop Hysteresis under Typical Operating Conditions for a Proton Exchange Membrane Fuel Cell
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Two-Phase Flow Pressure Drop Hysteresis under Typical Operating Conditions for a Proton Exchange Membrane Fuel Cell

机译：质子交换膜燃料电池典型工作条件下的两相流压降滞后

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摘要

Two-phase flow pressure drop hysteresis was studied under conditions typical of an operating PEM fuel cell. Two-phase flow hysteresis occurs when the gas and liquid flow rates are increased and decreased along the same path but exhibit different pressure drops. Variables studied include temperature (30-90℃), air stoichiometry (1-4), and gas diffusion layer. The results were analyzed relative to a baseline of fully humidified air at 75°C and a stoichiometry of 2 with a SGL Carbon 25 BC GDL. The percentage change between ascending and descending pressure drop is used to quantify the relative magnitude of the hysteresis. It was found that a sufficient air stoichiometry (>4) can reduce the hysteresis, the GDL properties affect the water breakthrough mechanism and shift the onset of the hysteresis zone, and higher temperatures reduce the relative magnitude of the hysteresis effect. These results correlate well with photographs of the cathode channel two-phase flow.
机译：在运行的PEM燃料电池的典型条件下研究了两相流压降滞后现象。当气体和液体的流速沿相同的路径增加和减少但显示出不同的压降时，就会发生两相流动滞后。研究的变量包括温度（30-90℃），空气化学计量比（1-4）和气体扩散层。相对于75°C的完全湿润空气的基线和SGL Carbon 25 BC GDL的化学计量比为2来分析结果。上升和下降压降之间的百分比变化用于量化磁滞的相对大小。发现足够的空气化学计量比（> 4）可以减少磁滞现象，GDL特性会影响水穿透机理并改变磁滞区域的开始，而较高的温度会降低磁滞效应的相对强度。这些结果与阴极通道两相流的照片很好地相关。

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  • 来源
  • 会议地点 Vancouver(CA);Vancouver(CA)
  • 作者

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

  • 作者单位

    Department of Chemical and Biological Engineering, University of British Columbia,Vancouver, British Columbia, V6T1Z3, Canada,Clean Energy Research Centre, University of British Columbia, Vancouver, British Columbia, V6T1Z3, Canada;

    Department of Chemical and Biological Engineering, University of British Columbia,Vancouver, British Columbia, V6T1Z3, Canada,Clean Energy Research Centre, University of British Columbia, Vancouver, British Columbia, V6T1Z3, Canada;

    Department of Chemical and Biological Engineering, University of British Columbia,Vancouver, British Columbia, V6T1Z3, Canada,Clean Energy Research Centre, University of British Columbia, Vancouver, British Columbia, V6T1Z3, Canada;

    Department of Chemical and Biological Engineering, University of British Columbia,Vancouver, British Columbia, V6T1Z3, Canada,Clean Energy Research Centre, University of British Columbia, Vancouver, British Columbia, V6T1Z3, Canada;

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  • 正文语种 eng
  • 中图分类 独立电源技术（直接发电）;
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