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Energies 2013, 6(9), 4508-4530; doi:10.3390/en6094508
Article

Modeling the Liquid Water Transport in the Gas Diffusion Layer for Polymer Electrolyte Membrane Fuel Cells Using a Water Path Network

*  and
Received: 12 July 2013; in revised form: 15 August 2013 / Accepted: 19 August 2013 / Published: 2 September 2013
(This article belongs to the Special Issue Polymer Electrolyte Membrane Fuel Cells)
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Abstract: In order to model the liquid water transport in the porous materials used in polymer electrolyte membrane (PEM) fuel cells, the pore network models are often applied. The presented model is a novel approach to further develop these models towards a percolation model that is based on the fiber structure rather than the pore structure. The developed algorithm determines the stable liquid water paths in the gas diffusion layer (GDL) structure and the transitions from the paths to the subsequent paths. The obtained water path network represents the basis for the calculation of the percolation process with low calculation efforts. A good agreement with experimental capillary pressure-saturation curves and synchrotron liquid water visualization data from other literature sources is found. The oxygen diffusivity for the GDL with liquid water saturation at breakthrough reveals that the porosity is not a crucial factor for the limiting current density. An algorithm for condensation is included into the model, which shows that condensing water is redirecting the water path in the GDL, leading to an improved oxygen diffusion by a decreased breakthrough pressure and changed saturation distribution at breakthrough.
Keywords: PEM fuel cell; GDL; water management; percolation; network model; condensation PEM fuel cell; GDL; water management; percolation; network model; condensation
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Alink, R.; Gerteisen, D. Modeling the Liquid Water Transport in the Gas Diffusion Layer for Polymer Electrolyte Membrane Fuel Cells Using a Water Path Network. Energies 2013, 6, 4508-4530.

AMA Style

Alink R, Gerteisen D. Modeling the Liquid Water Transport in the Gas Diffusion Layer for Polymer Electrolyte Membrane Fuel Cells Using a Water Path Network. Energies. 2013; 6(9):4508-4530.

Chicago/Turabian Style

Alink, Robert; Gerteisen, Dietmar. 2013. "Modeling the Liquid Water Transport in the Gas Diffusion Layer for Polymer Electrolyte Membrane Fuel Cells Using a Water Path Network." Energies 6, no. 9: 4508-4530.


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