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용융탄산염 연료전지의 운전변수가 성능에 미치는 영향에 대한 수치모사와 실험치와의 비교
안영주,정귀영,주재백,남석우,오인환,임태훈,홍성안 ( Young Joo Ahn,Gui Yung Chung,Jae Back Ju,Suk Woo Nam,In Hwan Oh,Tae Hoon Lim,Seong Ahn Hong ) 한국화학공학회 1995 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.33 No.4
A mathematical model is proposed to simulate the effect of variables on cell performances of molten carbonate unit fuel cell at the constant temperature. Values of the total cell resistance calculated with twice of the Arrhenius constant in the equation of anode resistance, presented in the reference, agreed well with experimental data. On the basis of these results, numerical calculations of the effects of current density, the gas utilization(i.e. flow rate), gas compositions, and cell temperature on the cell performances were compared with experimental data[1]. At the constant temperature, numerical calculations of the effects of operating variables on the cell performances, such as voltage and power, were agreed well with experimental data.
김미현,정귀영,남석우,오인환,임태훈,홍성안 한국에너지학회 1999 에너지공학 Vol.8 No.1
원형 용융탄산염 단위 연료전지의 성능 및 온도분포가 수치모사를 통해 얻어졌다. 원형 단위전지내에서는 사각형 단위전지에 비해 비교적 균일한 온도분포가 얻어졌다. 전지의 바깥쪽으로 갈수록 가스전환율이 커졌고 전류밀도도 크게 증가하였다. 운전전압이 감소할수록 각 가스들의 전환율은 커지고 전류밀도도 커졌다. 원형 전지에서의 평균전류밀도나 출력은 전압이 높을 때는 사각형 전지보다 작았고, 전압이 낮을 때는 더 컸다. 음극 및 양극 가스의 전환율도 마찬가지였다. 전압이 낮을 때 가스의 전환율이 커서 원형 전지의 효용성이 크게 나타났다.
용융탄산염 단위 연료전지 내의 에너지와 물질수지에 의한 온도분포의 예측과 운전변수의 영향
안영주,정귀영,주재백,남석우,오인환,임태훈,홍성안 ( Young Joo Ahn,Gui Yung Chung,Jae Back Ju,Suk Woo Nam,In Hwan Oh,Tae Hoon Lim,Seong Ahn Hong ) 한국화학공학회 1994 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.32 No.6
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.
Studies on the effects of the reaction rate on the fluid dynamics in the gas channel of MCFC
유민정,김인구,정귀영,남석우,임태훈,홍성안,이충곤,임희천 한국화학공학회 2007 화학공학의이론과응용 Vol.10 No.1
By using Pheonics, each operating variable had effects on what kind of efficient of MCFC. The basic structure of MCFC is made up of separate plate, fuel gas channel, cathode electrode, electro-catalyst plate, anode electrode, oxidizer gas channel, and separate plate. About unit fuel cell (length 1cm, width 1.4cm), generation and consumption of CO2 were calculated by using Pheonics. In the simple form of MCFC, we supposed that consumption of CO2 was happened by the electrode reaction at cathode and generation of CO2 was happened at anode. As the counted results in Pheonics, amount of the consumption of CO2 at cathode was counted according to the processing direction of gas. Amount of the consumption of H2 and H2O were counted according to the generation of CO2. According to the processing direction of gas, amount of CO2 transition, distribution of pressure and temperature were counted at electric chemical velocity coefficient of surface K1 and 10K1.