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Effect of Structural Parameters and Operational Characteristic Analysis on Ejector Used in Proton Exchange Membrane Fuel Cell

Author

Listed:
  • Chao Li

    (School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China)

  • Baigang Sun

    (School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China)

  • Qinghe Luo

    (School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China)

Abstract

A hydrogen ejector for PEMFC system is designed based on thermodynamic theory with considering the influence of water vapor. A CFD model is built in order to optimize the geometric parameters, comprehensively considering performance of different operating conditions. Moreover, effect of structural parameters and operating conditions on PEMFC ejector performance was studied using single-factor and multi-factor analysis methods. The single-factors analysis results show that the nozzle throat diameter, nozzle divergent angle (A), nozzle throat length (B), nozzle exit position (C), mixing tube diameter (D), mixing tube length (E) and are crucial structural parameters that affect the performance of the ejector significantly. Multi-factors analysis is carried to gain the sensitivity of the crucial parameters and further optimize performance of the ejector on PEMFC. For low current (110 A), middle current (275 A), and high current (412.5 A), the order of influence of performance were (D > A > B > C > E), (D > A > B> E > C), and (D > C > E > B > A), respectively. The optimized ejector by multi-factor analysis method has a better performance than one optimized by single-factor. This study may provide a new way of thinking for optimization of structural parameters of any PEMFC ejector with various operating condition.

Suggested Citation

  • Chao Li & Baigang Sun & Qinghe Luo, 2022. "Effect of Structural Parameters and Operational Characteristic Analysis on Ejector Used in Proton Exchange Membrane Fuel Cell," Sustainability, MDPI, vol. 14(15), pages 1-21, July.
    • Handle: RePEc:gam:jsusta:v:14:y:2022:i:15:p:9205-:d:872998
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    References listed on IDEAS

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    1. Tsai, Shang-Wen & Chen, Yong-Song, 2017. "A mathematical model to study the energy efficiency of a proton exchange membrane fuel cell with a dead-ended anode," Applied Energy, Elsevier, vol. 188(C), pages 151-159.
    2. Wu, Yifei & Zhao, Hongxia & Zhang, Cunquan & Wang, Lei & Han, Jitian, 2018. "Optimization analysis of structure parameters of steam ejector based on CFD and orthogonal test," Energy, Elsevier, vol. 151(C), pages 79-93.
    3. Hou, Junbo & Yang, Min & Zhang, Junliang, 2020. "Active and passive fuel recirculation for solid oxide and proton exchange membrane fuel cells," Renewable Energy, Elsevier, vol. 155(C), pages 1355-1371.
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