Effects of coolant channels on large-scale Polymer Electrolyte Fuel Cells (PEFCS) |
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Authors: | H C Ju C -Y Wang |
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Institution: | (1) Department of Mechanical Engineering, Inha University, Incheon, 402-751, Korea;(2) Department of Mechanical and Nuclear Engineering, The Pennsylvania State University, University Park, PA 16802, USA |
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Abstract: | Fully coupled simulations of two-phase transport in Polymer Electrolyte Fuel Cells (PEFCs) and heat transfer in coolant channels
are performed in order to investigate the effects of cooling channel configuration on the distributions of temperature and
water within PEFCs. When a practical coolant flow rate is applied to large-scale cells for automotive applications, a significant
coolant temperature rise is expected from the coolant inlet to the outlet, particularly under high current density operations,
creating a significant cell temperature gradient along the flow direction as well. Consequently, a two-phase water profile
resulting from evaporation-condensation processes inside PEFCs is also strongly influenced by the cell temperature gradient
from the hot coolant inlet toward the cold coolant outlet regions, demonstrating that both temperature and liquid saturation
strongly depend on the thermal gradient along the coolant flow path. |
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Keywords: | Fuel cell Coolant channel Liquid saturation Two-phase transport Coolant temperature rise |
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