Non-isothermal dynamic modelling and optimization of a direct methanol fuel cell |
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Authors: | DaeHo Ko MinJeong Lee Won-Hyouk Jang Ulrike Krewer |
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Affiliation: | 1. Samsung SDI Co., Ltd., CAE Team Kongse-dong, Giheung-gu, Yongin-si, Gyeonggi-do 446-577, Republic of Korea;2. Samsung SDI Co., Ltd., Energy Laboratory, 575 Shin-dong, Yeongtong-gu, Suwon-si, Gyeonggi-do 443-391, Republic of Korea |
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Abstract: | A non-isothermal dynamic optimization model of direct methanol fuel cells (DMFCs) is developed to predict their performance with an effective optimum-operating strategy. After investigating the sensitivities of the transient behaviour (the outlet temperature, crossovers of methanol and water, and cell voltage) to operating conditions (the inlet flow rates into anode and cathode compartments, and feed concentration) through dynamic simulations, we find that anode feed concentration has a significantly larger impact on methanol crossover, temperature, and cell voltage than the anode and cathode flow rates. Also, optimum transient conditions to satisfy the desired fuel efficiency are obtained by dynamic optimization. In the developed model, the significant influence of temperature on DMFC behaviour is described in detail with successful estimation of its model parameters. |
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Keywords: | Direct methanol fuel cell Dynamic simulation and optimization Non-isothermal model Optimum operation |
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