Comparison of Liquid Water Dynamics in Bent Gas Channels of a Polymer Electrolyte Membrane Fuel Cell with Different Channel Cross Sections in a Channel Flooding Situation
Abstract
:1. Introduction
2. Model Formulation
2.1. Computational Domain
2.2. Numerical Method
2.3. Boundary and Operating Conditions
3. Results and Discussion
3.1. Effect of Surface Contact Angle of Top and Side Walls
3.2. Effect of GDL Surface Contact Angle and Air Inlet Velocity
4. Conclusions
- Considering both of the WVF and the WCR for the GDL surface, the trapezoidal channel with open angles of 60° provides the most favorable performance in a channel flooding situation. While changing the top and side wall contact angles from 45° to 120°, the hydrophobic contact angle of 120° shows the best results.
- Among the three GDL contact angles of 90°, 110°, and 140°, the hydrophobic GDL contact angle of 140° provides the most favorable water removal characteristics in a channel flooding situation.
- For all the three channel cross-sectional shapes, the water removal rate increases and the liquid water interface shows more complex patterns as the air inlet velocity increases.
Acknowledgments
Author Contributions
Conflicts of Interest
References
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Kim, J.H.; Lee, G.G.; Kim, W.T. Comparison of Liquid Water Dynamics in Bent Gas Channels of a Polymer Electrolyte Membrane Fuel Cell with Different Channel Cross Sections in a Channel Flooding Situation. Energies 2017, 10, 748. https://doi.org/10.3390/en10060748
Kim JH, Lee GG, Kim WT. Comparison of Liquid Water Dynamics in Bent Gas Channels of a Polymer Electrolyte Membrane Fuel Cell with Different Channel Cross Sections in a Channel Flooding Situation. Energies. 2017; 10(6):748. https://doi.org/10.3390/en10060748
Chicago/Turabian StyleKim, Jin Hyun, Gwang Goo Lee, and Woo Tae Kim. 2017. "Comparison of Liquid Water Dynamics in Bent Gas Channels of a Polymer Electrolyte Membrane Fuel Cell with Different Channel Cross Sections in a Channel Flooding Situation" Energies 10, no. 6: 748. https://doi.org/10.3390/en10060748