PORE-SCALE SIMULATION OF GAS DIFFUSION LAYER TRANSPORT CHARACTERICS BASED ON XCT

Zhang Heng; Zhan Zhigang; Chen Ben; Sui Pangchieh; Pan Mu

doi:10.19912/j.0254-0096.tynxb.2022-0096

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Acta Energiae Solaris Sinica ›› 2023, Vol. 44 ›› Issue (6) : 99-105. DOI: 10.19912/j.0254-0096.tynxb.2022-0096

PORE-SCALE SIMULATION OF GAS DIFFUSION LAYER TRANSPORT CHARACTERICS BASED ON XCT

Zhang Heng^1,2, Zhan Zhigang², Chen Ben³, Sui Pangchieh³, Pan Mu²

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Abstract

To investigate the effect of porosity on the anisotropic transport properties in the gas diffusion layer of proton exchange membrane fuel cells （PEMFC）, the 3D microstructure of the Freudenberg H2315 gas diffusion layer is reconstructed firstly by using X-ray computed tomography （XCT） visualization technology. Then, the relationship between the gas effective diffusivity, tortuosity, effective electrical conductivity, effective thermal conductivity and porosity are studied by using the pore-scale model. The relationship between liquid water permeability in the through-plane and in-plane and porosity and the relationship between liquid water saturation versus capillary pressure are solved by using the lattice-Boltzmann model. The results show that the porosity has a significant effect on the transport properties, and the Freudenberg H2315 gas diffusion layer exhibits obvious isotropy.

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proton exchange membrane fuel cells / transport properties / microstructure / gas diffusion layer / XCT / pore scale model

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Zhang Heng, Zhan Zhigang, Chen Ben, Sui Pangchieh, Pan Mu. PORE-SCALE SIMULATION OF GAS DIFFUSION LAYER TRANSPORT CHARACTERICS BASED ON XCT[J]. Acta Energiae Solaris Sinica. 2023, 44(6): 99-105 https://doi.org/10.19912/j.0254-0096.tynxb.2022-0096

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