Tranter, TG, Burns, AD, Ingham, DB et al. (1 more author) (2015) The effects of compression on single and multiphase flow in a model polymer electrolyte membrane fuel cell gas diffusion layer. International Journal of Hydrogen Energy, 40 (1). 652 - 664. ISSN 0360-3199
Abstract
A two-dimensional study of an idealised fibrous medium representing the gas diffusion layer of a PEMFC is conducted using computational fluid dynamics. Beginning with an isotropic case the medium is compressed uni-directionally to observe the effects on single and multiphase flow. Relations between the compression ratio and the permeability of the medium are deduced and key parameters dictating the changes in flow are elucidated. The main conclusions are that whilst compression reduces the absolute permeability of an isotropic medium, the creation of anisotropic geometry results in preferential liquid water pathways. The most important parameter for capillary flow, in uniformly hydrophobic media, is the minimum fibre spacing normal to the flow path. The effect is less pronounced with decreasing contact angle and non-existent for neutrally wettable media.
Metadata
Item Type: | Article |
---|---|
Authors/Creators: |
|
Copyright, Publisher and Additional Information: | © 2015, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0 |
Keywords: | PEMFC; gas diffusion layer; compression; computational fluid dynamics; permeability |
Dates: |
|
Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemical & Process Engineering (Leeds) > Energy Tech & Innovation Initiative (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 07 May 2015 09:37 |
Last Modified: | 14 Apr 2017 03:53 |
Published Version: | http://dx.doi.org/10.1016/j.ijhydene.2014.11.051 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.ijhydene.2014.11.051 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:83977 |
Download
Filename: Effects of compression on single and two-phase flow in a model PEM fuel cell gas diffusion layer.pdf
Licence: CC-BY-NC-ND 4.0