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The Effect of Fiber Orientation on Stochastic Reconstruction and Permeability of a Carbon Paper Gas Diffusion Layer

Author

Listed:
  • Yuan Gao

    (School of Automotive Studies, Tongji University, Shanghai 201804, China)

  • Teng Jin

    (School of Automotive Studies, Tongji University, Shanghai 201804, China)

  • Xiaoyan Wu

    (Research & Advanced Technology Dept., SAIC Motor Corporation Limited, Shanghai 201804, China)

  • Tong Zhang

    (School of Automotive Studies, Tongji University, Shanghai 201804, China)

Abstract

By analyzing the three-dimensional digital model of a real carbon paper gas diffusion layer (GDL) reconstructed by X-ray computed tomography (CT), it was found that fibers are not distributed at any angle but within a certain range. The fiber orientation can be represented by fiber pitch (i.e., the angle between a single fiber and the in-plane direction). The effect of fiber orientation on stochastic reconstruction and transport properties (permeability) was investigated in this paper to find which fiber pitch range can achieve a better GDL on fluid flow. First, the actual fiber pitch was measured by analyzing SGL-24BA images obtained by X-ray CT. Also, seven different ranges of fiber pitch were randomly chosen to reconstruct GDL. Then, the permeability of these digital models was calculated using the Lattice Bolzmann Method (LBM) and discussed to obtain the fiber pitch range of the optimal permeability. The results show that the mean fiber pitch of SGL-24BA is 2.40° and the individual values are all less than 6°, also, the permeability of the through-plane direction increases gradually as the range of fiber pitch increases, which can be used for the structural design of carbon paper GDL.

Suggested Citation

  • Yuan Gao & Teng Jin & Xiaoyan Wu & Tong Zhang, 2019. "The Effect of Fiber Orientation on Stochastic Reconstruction and Permeability of a Carbon Paper Gas Diffusion Layer," Energies, MDPI, vol. 12(14), pages 1-13, July.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:14:p:2808-:d:250442
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    Citations

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    Cited by:

    1. Qiang Li & Tanghu Zhang & Tianyu Zhang & Zhichao Xue & Hong Sun, 2022. "Study on Two-Phase Permeation of Oxygen and Electrolyte in Lithium Air Battery Electrode Based on Digital Twin," Energies, MDPI, vol. 15(19), pages 1-12, September.
    2. Xiao, Liusheng & Bian, Miaoqi & Sun, Yushuai & Yuan, Jinliang & Wen, Xiaofei, 2024. "Transport properties evaluation of pore-scale GDLs for PEMFC using orthogonal design method," Applied Energy, Elsevier, vol. 357(C).

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