The flow in gas flow channels of an operating polymer electrolyte membrane (PEM) fuel cell has a two-phase characteristic that includes air, water vapor and liquid water and significantly affects the water flooding, pressure distribution along the channels, and subsequently the performance of the cell and system. Presence of liquid water in channels prevents transport of the reactants to the catalysts and increases the pressure difference between the inlet and outlet of channels, which leads to high parasitic power of pumps used in air and fuel supply systems. We propose a model that enables prediction of pressure drop and liquid water distribution along channels and analysis of water flooding in an operating fuel cell. The model was developed based on a gas-liquid two-phase separated flow that considers the variations of gas pressure, mass flow rate, relative humidity, viscosity, void fraction, and density along the channels on both sides. Effects of operating parameters that include stoichoimetric ratio, relative humidity, and inlet pressure on the pressure drop and water flooding along the channels were analyzed.
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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
Analysis of Pressure Drop and Water Flooding of Two-Phase Flow Along Channels for a PEM Fuel Cell System
Song-Yul Choe,
Song-Yul Choe
Auburn University, Auburn, AL
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Chang-Ouk Hong
Chang-Ouk Hong
Hyundai Rotem R&D Center, Seoul, Republic of Korea
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Jinglin He
Auburn University, Auburn, AL
Song-Yul Choe
Auburn University, Auburn, AL
Chang-Ouk Hong
Hyundai Rotem R&D Center, Seoul, Republic of Korea
Paper No:
FuelCell2009-85175, pp. 447-458; 12 pages
Published Online:
February 17, 2010
Citation
He, J, Choe, S, & Hong, C. "Analysis of Pressure Drop and Water Flooding of Two-Phase Flow Along Channels for a PEM Fuel Cell System." 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. 447-458. ASME. https://doi.org/10.1115/FuelCell2009-85175
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