Model for water transport in a polymer electrolyte fuel cell after shutdown

Manish Khandelwal, S. H. Lee, Young Je Son, M. M. Mench

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Scopus citations

Abstract

To mitigate potential freeze-damage, enhance durability and cold start performance of polymer electrolyte fuel cell (PEFC), residual water in the fuel cell components must be minimized. Ideally, we would like to achieve complete liquid removal with minimal parasitic losses. A transient two-phase mathematical model has been formulated to predict the water redistribution in the fuel cell components, after the PEFC shutdown. The novel feature of the model is inclusion of a directly measured thermo-osmosis relationship in the electrolyte membrane, and also the phase change related transport (heat-pipe effect) in the porous media. A preliminary scale analysis found that thermo-osmotic flux in the membrane is almost same order of magnitude of diffusion flux and the heat pipe effect can enhance the thermal transport out of the porous media by 200-300%. Ultimately, this model will be used as a tool to help understand and minimize the residual water saturation in the fuel cell components under different shutdown conditions.

Original languageEnglish
Title of host publicationECS Transactions - Proton Transfer and Transport in Fuel Cells - 213th ECS Meeting
Pages75-87
Number of pages13
Volume13
Edition28
DOIs
StatePublished - 1 Dec 2008
EventProton Transfer and Transport in Fuel Cells - 213th ECS Meeting - Phoenix, AZ, United States
Duration: 18 May 200923 May 2009

Other

OtherProton Transfer and Transport in Fuel Cells - 213th ECS Meeting
CountryUnited States
CityPhoenix, AZ
Period18/05/0923/05/09

Cite this

Khandelwal, M., Lee, S. H., Son, Y. J., & Mench, M. M. (2008). Model for water transport in a polymer electrolyte fuel cell after shutdown. In ECS Transactions - Proton Transfer and Transport in Fuel Cells - 213th ECS Meeting (28 ed., Vol. 13, pp. 75-87) https://doi.org/10.1149/1.3055408