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Mitigation strategies for hydrogen starvation under dynamic loading in proton exchange membrane fuel cells

机译：质子交换膜燃料电池动态载荷下氢饥饿的缓解策略

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摘要

Hydrogen starvation in a proton exchange membrane (PEM) fuel cell during dynamic loading can have detrimental effects to cell performance, causing significant degradations to cell components and reduce stack durability. In this study, mitigation strategies for hydrogen starvation are proposed and effectiveness of the approaches is studied by measuring variations of local current densities and temperatures in situ under various load change scenarios. A two-step startup strategy is studied and the experimental results show that current undershoots in the downstream and the region with zero current at the ()inlet can be completely eliminated. Experimental studies have also been conducted to examine the effectiveness of a hydrogen reservoir at the anode outlet and the results show that it can significantly reduce the fluctuations in both local current densities and temperatures under both potentiostatic and galvanostatic modes. (C) 2017 Elsevier Ltd.
机译：在动态加载过程中，质子交换膜（PEM）燃料电池中的氢缺乏可能会对电池性能产生不利影响，从而导致电池组件严重退化并降低电池组的耐用性。在这项研究中，提出了氢饥饿的缓解策略，并通过在各种负载变化情况下测量局部电流密度和温度的变化来研究该方法的有效性。研究了两步启动策略，实验结果表明，可以完全消除下游的电流下冲以及（）入口处电流为零的区域。还进行了实验研究以检查在阳极出口处的储氢器的有效性，结果表明，在恒电位和恒电流模式下，它都能显着减小局部电流密度和温度的波动。 （C）2017爱思唯尔有限公司

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  • 来源
    《Energy Conversion & Management》 |2017年第5期|175-181|共7页
  • 作者

    Jia Fei; Guo Liejin; Liu Hongtan;

  • 作者单位

    Xidian Univ, Sch Mechanoelect Engn, Xian 710071, Shaanxi, Peoples R China|Xi An Jiao Tong Univ, Int Res Ctr Renewable Energy, State Key Lab Multiphase Flow Power Engn, Xian 710049, Shaanxi, Peoples R China;

    Xi An Jiao Tong Univ, Int Res Ctr Renewable Energy, State Key Lab Multiphase Flow Power Engn, Xian 710049, Shaanxi, Peoples R China;

    Univ Miami, Dept Mech & Aerosp Engn, Clean Energy Res Inst, Coral Gables, FL 33124 USA;

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

    Hydrogen starvation; Proton exchange membrane fuel cell; (PEMFC); Mitigation strategies; Local current density;

    机译：氢饥饿;质子交换膜燃料电池;（PEMFC）;缓解策略;局部电流密度;

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