한국신재생에너지학회:학술대회논문집
- 2007.11a
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- Pages.27-30
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- 2007
Analytical Study on the Oscillating Flow Effect in a Anode Channel of Direct Methanol Fuel Cells
연료극 왕복유동이 직접 메탄올 연료전지에 미치는 영향에 대한 해석적 연구
Abstract
This study considers the feasibility of the concentration control of the methanol solution by oscillating flow in the anode channel of passive type Direct Methanol Fuel Cells(DMFC). DMFC stack performance is largely influenced by the fuel concentration. If the fuel concentration is either lower than 0.5M or more than 2M, its performance deteriorates seriously because of the fuel starvation or the fuel crossover. In this respect the optimization of the fuel concentration is crucially important to maximize the DMFC stack performance. In this work, the effects of oscillating actuation in the fuel supply are studied to control the fuel concentration. Two important nondimensional parameters are introduced, each of which represents either the oscillating frequency or the oscillating amplitude. It is shown how these factors affect the stack performance and the efficiency of the DMFC stack.