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首页> 外文会议>11th fuel cell science, engineering, and technology conference 2013 >EFFECT OF MEMBRANE PROPERTIES ON DYNAMIC BEHAVIOR OF POLYMER ELECTROLYTE MEMBRANE FUEL CELLS
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EFFECT OF MEMBRANE PROPERTIES ON DYNAMIC BEHAVIOR OF POLYMER ELECTROLYTE MEMBRANE FUEL CELLS

机译：膜性能对高分子电解质膜燃料电池动态行为的影响

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摘要

Understanding the performance of proton exchange membrane (PEM) fuel cells is critical to the water management in the fuel cell system. Low-humidity operating conditions present a complex interaction between dynamic behavior and water transport owing to different time scales of water transport mechanisms in the transient process. Toward understanding the effects of membrane properties on the dynamic behavior, this paper presents numerical simulations for a single channel PEM fuel cell undergoing changes in load, by subjecting the unit cell to step change in current. The objective is to elucidate the complex interaction between cell voltage response and water transport dynamics for various membrane properties, where the performance is critically related water content of the membrane. Detailed computational fluid dynamics (CFD) simulations are carried out to show that step increase in current density leads to anode dryout due to electro-osmotic drag, and investigate its dependence on variations in membrane properties.
机译：了解质子交换膜（PEM）燃料电池的性能对于燃料电池系统中的水管理至关重要。由于瞬态过程中水传输机制的时间尺度不同，低湿度运行条件在动态行为和水传输之间呈现出复杂的相互作用。为了理解膜特性对动态行为的影响，本文通过使单电池经受电流的阶跃变化，对单通道PEM燃料电池承受负载变化进行了数值模拟。目的是阐明各种膜特性的电池电压响应和水输送动力学之间的复杂相互作用，其中性能是膜的水含量的关键相关因素。进行了详细的计算流体动力学（CFD）模拟，以显示电流密度的逐步增加会由于电渗透阻力而导致阳极变干，并研究其对膜性能变化的依赖性。

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  • 会议地点 Minneapolis MN(US)
  • 作者

    Atul Verma; Ranga Pitchumani;

  • 作者单位

    Advanced Materials and Technologies Laboratory Department of Mechanical Engineering Virginia Tech Blacksburg, Virginia 24061-0238;

    Advanced Materials and Technologies Laboratory Department of Mechanical Engineering Virginia Tech Blacksburg, Virginia 24061-0238;

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  • 正文语种 eng
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