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Self-humidifying effect of air self-circulation system for proton exchange membrane fuel cell engines

机译：质子交换膜燃料电池发动机空气自循环系统的自加湿效果

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摘要

A dynamic mechanism model of a control-oriented hydrogen fuel cell system based on the cathode exhaust gas cycle is established, and the effects of operating parameters on the two-phase water transfer and dynamic output performance of a fuel cell are analyzed, the transport process of material and the spatial distribution of water content in the membrane electrode were obtained. The study found that too low humidity at the cathode inlet of the stack will cause corrosion of the catalyst layer and the carbon black carrier, resulting in agglomeration and sintering of the catalyst particles. The membrane is also severely damaged by mechanical properties, and black impurities and broken fibers are found on the membrane surface. Under the passive operation of the cathode self-circulation system, the maximum humidity of the mixed gas can reach 60%. The new system is advantageous to the evaporation of water vapor at higher operating temperature and can inhibit the flooding of membrane electrode assembly. It takes about 20s for the current to reach the steady state of the set value, and about 30s for the voltage to reach the steady state. The voltage fluctuation is small and the output power is stable, indicating high reliability. (c) 2020 Elsevier Ltd. All rights reserved.
机译：建立了一种基于阴极废气循环的控制取向氢燃料电池系统的动态机制模型，分析了操作参数对燃料电池的两相水转印和动态输出性能的影响，运输过程得到了膜电极中水含量的材料和空间分布。该研究发现，堆叠的阴极入口处的湿太低将导致催化剂层和炭黑载体的腐蚀，导致催化剂颗粒的附聚和烧结。膜也受到机械性能严重破坏，并且在膜表面上发现了黑色杂质和破碎的纤维。在阴极自循环系统的被动操作下，混合气体的最大湿度可达到60％。新系统有利于在较高工作温度下蒸发水蒸气，并且可以抑制膜电极组件的泛滥。电流需要大约20多秒，达到设定值的稳定状态，电压约为30秒，以达到稳态。电压波动小，输出功率稳定，表示高可靠性。 （c）2020 elestvier有限公司保留所有权利。

著录项

  • 来源
    《Renewable energy》 |2021年第2期|1143-1155|共13页
  • 作者

    Zhang Qinguo; Tong Zheming; Tong Shuiguang; Cheng Zhewu;

  • 作者单位

    Zhejiang Univ Ningbo Res Inst Ningbo 315100 Peoples R China|Zhejiang Univ State Key Lab Fluid Power & Mechatron Syst Hangzhou 310027 Peoples R China|Zhejiang Univ Sch Mech Engn Hangzhou 310013 Peoples R China|Zhejiang Univ Ningbo Inst Technol Ningbo 315100 Peoples R China;

    Zhejiang Univ Ningbo Res Inst Ningbo 315100 Peoples R China|Zhejiang Univ State Key Lab Fluid Power & Mechatron Syst Hangzhou 310027 Peoples R China|Zhejiang Univ Sch Mech Engn Hangzhou 310013 Peoples R China;

    Zhejiang Univ Ningbo Res Inst Ningbo 315100 Peoples R China|Zhejiang Univ State Key Lab Fluid Power & Mechatron Syst Hangzhou 310027 Peoples R China|Zhejiang Univ Sch Mech Engn Hangzhou 310013 Peoples R China;

    Zhejiang Univ Ningbo Res Inst Ningbo 315100 Peoples R China|Zhejiang Univ State Key Lab Fluid Power & Mechatron Syst Hangzhou 310027 Peoples R China|Zhejiang Univ Sch Mech Engn Hangzhou 310013 Peoples R China|Zhejiang Univ Ningbo Inst Technol Ningbo 315100 Peoples R China;

  • 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

    Proton exchange membrane fuel cell (PEMFC); Cathode exhaust circulation; Self-humidifying effect; Liquid water saturation;

    机译：质子交换膜燃料电池（PEMFC）;阴极排气循环;自加湿效果;液体水饱和;

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