This paper reports our recent work on the stochastic-model-based reconstruction of the gas diffusion layer (GDL) of PEFCs and direct numerical simulation and presented the pore-level transport within GDLs of polymer electrolyte fuel cell (PEFC). The carbon-paper-based GDL is modeled as a stack of thin sections with each section described by planar 2D random line tessellations which are further dilated to three dimensions. The reconstruction of the GDL structure is based on given GDL data provided by scanning electron microscopy (SEM) images. Based on the stochastically constructed digital GDL, we further conduct the DNS of the coupled transport processes, including gas flow and species transport, electronic current conduction, and heat transfer. Results indicate remarkable distinction in tortuosities of gas diffusion passage and solid matrix. The numerical tool can be applied to investigate the GDL microstructure and internal pore-level transport in PEFCs.
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ASME 2009 Second International Conference on Micro/Nanoscale Heat and Mass Transfer
December 18–21, 2009
Shanghai, China
Conference Sponsors:
- Nanotechnology Institute
ISBN:
978-0-7918-4390-1
PROCEEDINGS PAPER
Micro-Scale Transport in the Diffusion Media of Polymer Electrolyte Fuel Cells Available to Purchase
Yun Wang,
Yun Wang
University of California, Irvine, Irvine, CA
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Xuhui Feng,
Xuhui Feng
University of California, Irvine, Irvine, CA
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Ralf Thiedmann,
Ralf Thiedmann
Ulm University, Ulm, Germany
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Volker Schmidt,
Volker Schmidt
Ulm University, Ulm, Germany
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Werner Lehnert
Werner Lehnert
Forschungszentrum Ju¨lich GmbH, Ju¨lich, Germany
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Yun Wang
University of California, Irvine, Irvine, CA
Xuhui Feng
University of California, Irvine, Irvine, CA
Ralf Thiedmann
Ulm University, Ulm, Germany
Volker Schmidt
Ulm University, Ulm, Germany
Werner Lehnert
Forschungszentrum Ju¨lich GmbH, Ju¨lich, Germany
Paper No:
MNHMT2009-18201, pp. 265-270; 6 pages
Published Online:
October 26, 2010
Citation
Wang, Y, Feng, X, Thiedmann, R, Schmidt, V, & Lehnert, W. "Micro-Scale Transport in the Diffusion Media of Polymer Electrolyte Fuel Cells." Proceedings of the ASME 2009 Second International Conference on Micro/Nanoscale Heat and Mass Transfer. ASME 2009 Second International Conference on Micro/Nanoscale Heat and Mass Transfer, Volume 2. Shanghai, China. December 18–21, 2009. pp. 265-270. ASME. https://doi.org/10.1115/MNHMT2009-18201
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