Journal
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
Volume 43, Issue 7, Pages 2737-2755Publisher
WILEY
DOI: 10.1002/er.4328
Keywords
baffled flow channel; cell performance; flow channel design; proton exchange membrane fuel cell; pumping power
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Funding
- National Natural Science Foundation of China [51476003]
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In proton exchange membrane fuel cells, baffled flow channels can enhance the reactant transfer and improve the cell performance. Many different baffled flow channels have been numerically studied in previous published papers. However, what kind of baffled flow channels can improve the cell performance most is still unknown. In this simulation work, a two-dimensional, two-phase, nonisothermal, and steady-state model of proton exchange membrane fuel cells is developed. The mass transfer and cell performance of PEMFCs with different baffled flow channels have been numerically compared. Simulation results show that the rectangular baffle can enhance the reactant transfer most and improve the cell performance most; however, the power loss in rectangular baffled flow channel is also the highest. To inherit the advantages and overcome the shortages of the rectangular baffled flow channel, an optimized baffled flow channel is developed. In this newly developed baffled flow channel, the windward side is designed as the streamline shape and the leeward side is designed as the sloped shape. Results of the simulation also show that the optimized baffled flow channel can reduce the power loss accounted by the pumping power in reactant delivering process and the cell performance can be further improved.
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