This paper compares two models of dynamic water sorption in Nafion® membranes of polymer electrolyte fuel cells. The first sorption model, commonly used in fuel cell modeling, is based on an assumption of perpetual equilibrium between the membrane water and water vapor at all membrane/vapor interfaces. The second approach, based on non-equilibrium dynamics, assumes that the rate of water sorption in the membrane is proportional to the difference between its actual water content and the equilibrium value. Results show that the steady state membrane water concentration gradient is lower in the equilibrium model, which means that it underestimates the cathode side flooding and anode side dehydration phenomena, compared with the nonequilibrium model. The transient response to changes in cathode humidification is also shown to be significantly different under both models.
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ASME 2009 7th International Conference on Fuel Cell Science, Engineering and Technology
June 8–10, 2009
Newport Beach, California, USA
Conference Sponsors:
- Advanced Energy Systems Division
ISBN:
978-0-7918-4881-4
PROCEEDINGS PAPER
Dynamic Modeling of Water Sorption in PEM Fuel Cells
Denver Cheddie
Denver Cheddie
University of Trinidad and Tobago, Couva, Trinidad/Tobago
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Denver Cheddie
University of Trinidad and Tobago, Couva, Trinidad/Tobago
Paper No:
FuelCell2009-85016, pp. 273-280; 8 pages
Published Online:
February 17, 2010
Citation
Cheddie, D. "Dynamic Modeling of Water Sorption in PEM Fuel Cells." Proceedings of the ASME 2009 7th International Conference on Fuel Cell Science, Engineering and Technology. ASME 2009 7th International Conference on Fuel Cell Science, Engineering and Technology. Newport Beach, California, USA. June 8–10, 2009. pp. 273-280. ASME. https://doi.org/10.1115/FuelCell2009-85016
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