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首页> 外文期刊>Energy Conversion & Management >Experimental study of the S-shaped flow fields in proton exchange membrane fuel cells
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Experimental study of the S-shaped flow fields in proton exchange membrane fuel cells

机译：质子交换膜燃料电池的S形流动场的实验研究

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摘要

Flow fields play an important role in performance enhancement of a Proton Exchange Membrane Fuel Cells (PEMFCs). However, the weak mass transport ability of the conventional parallel flow field seriously affects the cell performance, especially at high current density. In this work, a series of S-shaped flow fields are designed and experimentally verified. The effects of key design parameters, such as the S radius (R) and the S length (H), on the cell performance are investigated in detail by recording the polarization curves under different cathode relative humidity (RH) levels and stoichiometric ratios. The results indicate that the small R and large H are beneficial to the promotion of cell performance owing to the increased turbulence and decreased liquid water content in the cell, which is also proved by the electrochemical impedance spectroscopy (EIS). However, the pressure drop significantly increases at the same time, which affects the output ability of the cell. Considering the net output capacity and the processing processing possibility, the cell with the S radius of 17.4 mm and the S length of 40 mm exhibited the peak power density of 1.02 W cm(-2), with 15% higher than the CPFF (870 W cm(-2)).
机译：流场在质子交换膜燃料电池（PEMFC）的性能增强中起重要作用。然而，传统的平行流场的弱传质能力严重影响电池性能，尤其是在高电流密度下。在这项工作中，设计了一系列S形流场和实验验证。通过在不同的阴极相对湿度（RH）水平下的偏振曲线和化学计量比下，详细研究了关键设计参数的效果，例如S半径（R）和S长度（H）。结果表明，由于电化学阻抗光谱（EIS）也证明，小型r和大H由于增加的湍流和细胞中的液体含水量降低而有利于促进细胞性能。然而，压降同时显着增加，这会影响细胞的输出能力。考虑到净输出容量和加工处理可能性，具有17.4mm的S半径和40 mm的电池表现出1.02W cm（-2）的峰值功率密度，比CPFF高15％（870 W cm（-2））。

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  • 来源
    《Energy Conversion & Management》 |2020年第11期|113292.1-113292.8|共8页
  • 作者

    He Liang; Hou Ming; Gao Yanyan; Sun Xinye; Song Wei; Zheng Liming; Ai Jun; Zhang Hongjie; Shao Zhigang;

  • 作者单位

    Chinese Acad Sci Dalian Inst Chem Phys Dalian Natl Lab Clean Energy Dalian 116023 Liaoning Peoples R China|Univ Chinese Acad Sci Beijing 100039 Peoples R China;

    Chinese Acad Sci Dalian Inst Chem Phys Dalian Natl Lab Clean Energy Dalian 116023 Liaoning Peoples R China;

    Chinese Acad Sci Dalian Inst Chem Phys Dalian Natl Lab Clean Energy Dalian 116023 Liaoning Peoples R China|Univ Chinese Acad Sci Beijing 100039 Peoples R China;

    Chinese Acad Sci Dalian Inst Chem Phys Dalian Natl Lab Clean Energy Dalian 116023 Liaoning Peoples R China|Univ Chinese Acad Sci Beijing 100039 Peoples R China;

    Chinese Acad Sci Dalian Inst Chem Phys Dalian Natl Lab Clean Energy Dalian 116023 Liaoning Peoples R China;

    Chinese Acad Sci Dalian Inst Chem Phys Dalian Natl Lab Clean Energy Dalian 116023 Liaoning Peoples R China;

    Chinese Acad Sci Dalian Inst Chem Phys Dalian Natl Lab Clean Energy Dalian 116023 Liaoning Peoples R China;

    Chinese Acad Sci Dalian Inst Chem Phys Dalian Natl Lab Clean Energy Dalian 116023 Liaoning Peoples R China;

    Chinese Acad Sci Dalian Inst Chem Phys Dalian Natl Lab Clean Energy Dalian 116023 Liaoning 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

    PEMFCs; S-shaped flow field; Experimental research; Gas transport; Water management;

    机译：PEMFCS;S形流动场;实验研究;天然气运输;水管理;

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