Three-dimensional,two-phase,CFD model for the design of a direct methanol fuel cell |
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| Affiliation: | 1. Department of Chemical Engineering, Yonsei University Seodaemun-gu Shinchon-dong 134, Seoul 120-749, South Korea;2. Samsung Advanced Institute of Technology, Suwon 440-600, South Korea;1. Thermal Engineering Group, School of Engineering, University of Sevilla, Spain;2. Electrochemistry Laboratory (LEC), Paul Scherrer Institut (PSI), Switzerland;3. Neutron Imaging and Activation Group (NIAG), Paul Scherrer Institut (PSI), Switzerland |
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| Abstract: | This study presents a computational fluid dynamics (CFD) model for modelling gas evolution and current distribution in a direct methanol fuel cell (DMFC). The improved two-phase model includes a new sub-model for estimating the interface mass transfer without empirical correlations. Simulation results in a horizontal channel of the DMFC agree with typical trends reported in the literature for bubbly flows. The increase in inlet flow rate is found to lead to a decrease in the gas content in the outlet of the anode channels. A case study illustrates applications of the CFD model for modelling gas evolution and current distribution in a DMFC with a parallel flow-field design. Simulation results with a improved two-phase model provide an explanation of experimental observations of a transparent DMFC with parallel channels. An improved three-dimensional CFD model includes all relevant phenomena and is valuable for gas management in a DMFC design. |
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