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용융탄산염 단위 연료전지 내의 에너지와 물질수지에 의한 온도분포의 예측과 운전변수의 영향
Prediction of Temperature Distributions from Mass and Energy Balances and Effects of Operating Parameters in Molten Carbonate Unit Fuel Cell
HWAHAK KONGHAK, December 1994, 32(6), 830-843(14), NONE
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Abstract
융용탄산염 단위연료전지의 전류밀도와 온도분포를 모사하기 위한 수학적 모델이 제시되었다. 이 모델에서 전기화학반응에 의한 가스의 전환율, 전도, 대류 및 복사 열전달, 반응에 의한 가스의 생성열과 소모열을 고려하여 흐름형태가 십자류와 평형류일 때 단위전지 내의 전류밀도분포와 온도분포를 구하였다. 이것을 기초로 가스의 유량과 양극가스 대 음극가스의 유량비 변화에 대한 전류밀도분포와 온도분포를 구하였다. 전류밀도분포는 음극가스, 온도분포는 양극가스의 영향을 많이 받았는데 전지 내에 균일한 온도분포를 유지하기 위해서는 입구에서의 양극가스 대 음극가스의 유량비가 0.25 정도되도록 흘려보내는 것이 바람직했다.
A mathematical model is proposed to simulate the current density and the temperature distribution of molten carbonate unit fuel cell. In this model, conversion of gases, heat transfer by conduction, convection, and radiation, and heat generation by reaction were considered for the cross and the parallel flow type fuel cell. Additionally, the effects of the gas flow rate and the ratio of the flow rate of the cathode gas to that of the anode gas were studied. It was seen that the current density distribution was affected by the anode gas, while the temperature distribution by the cathode gas. It was also found that, in order to get an uniform temperature distribution, the ratio of the flow rate of the cathode gas to that of the anode gas should be around 0.25.
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Gidaspow D, Baker BS, AIChE J., 11, 825 (1965)
Wolf TL, Wilemski G, J. Electrochem. Soc., 130, 48 (1983)
Kobayashi N, Fugimura H, Ohtsuka K, 일본기계학회논문집(B), 54(505), 2568 (1988)
Kobayashi N, Fugimura H, Ohtsuka K, 일본기계학회논문집(B), 57(535), 825 (1991)
Cao G, Masubuchi M, 일본기계학회논문집(B), 37, 535 (1991)
Selman JR, Molten Salt Committee of the Electrochemical Society of Japan (1988)
Sampath V, Sammels AF, J. Electrochem. Soc., 127, 79 (1980)
Wilemski G, J. Electrochem. Soc., 130, 117 (1983)
Watanabe K, Nikai I, 일본기계학회논문집(B), 52(481), 3335 (1986)
Appleby AJ, Foulkes FR, "Fuel Cell Handbook," 539 (1989)
Incropera FP, Dewitt DP, "Introduction to Heat Transfer," 825 (1989)
Lim TH, Lee KS, Nam SW, Oh IH, Hong SA, Lim HC, HWAHAK KONGHAK, 32(3), 498 (1994)
