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5kW 급 MCFC 발전시스템 촉매연소기의 유동 및 연소 특성에 대한 수치적 연구
김종민(Chongmin Kim),이연화(Younwha Lee),김만영(Man Young Kim),김형곤(Hyung gon Kim),홍동진(Dongjin Hong),조주형(Ju Hyeong Cho),김한석(Han-Seok Kim),안국영(Kook Young Ahn) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.11
MCFC (molten carbonate fuel cell) power generation system is prime candidate for the utilization of fossil based fuels to generate ultra clean power with a high efficiency. In the MCFC power plant system, a combustor performs a role to supply high temperature mixture gases for cathode and heat for reformer by using the stack off-gas of the anode which includes a high concentration of H₂O and CO₂. Since a combustor needs to be operated in a very lean condition and to avoid excessive local heating, catalytic combustor is usually used. The catalytic combustion is accomplished by the catalytic chemical reaction between fuel and oxidizer at catalyst surface, different from conventional combustion. In this study, a mathematical model for the prediction of internal flow and catalytic combustion characteristics in the catalytic combustor adopted in the MCFC power plant system is suggested by using the numerical methods. The numerical simulation models are then implemented into the commercial CFD code. After verifying result by comparing with the experimental data and calibrated kinetic parameters of catalytic combustion reaction, a numerical simulation is performed to investigate the variation of flow and combustion characteristics by changing such various parameters as inlet configuration and inlet temperature. The result show that the catalytic combustion can be effectively improved for most of the case by using the perforated plate and subsequent stable catalytic combustion is expected.
25㎾ 급 MCFC용 촉매연소기 개발에 대한 실험적 연구
김종민(Chongmin Kim),홍동진(Dongjin Hong),이연화(Younwha Lee),김만영(Man Young Kim),조주형(Ju Hyeong Cho),김한석(Han-Seok Kim),안국영(Kook Young Ahn) 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.5
MCFC (molten carbonate fuel cell) power generation system is prime candidate for the utilization of fossil based fuels to generate ultra clean power with a high efficiency. In the MCFC power plant system, a combustor performs a role to supply high temperature mixture gases for cathode and heat for reformer by using the stack off-gas of the anode which includes a high concentration of H₂O and CO₂. Since a combustor needs to be operated in a very lean condition and to avoid excessive local heating, catalytic combustor is usually used. The catalytic combustion is accomplished by the catalytic chemical reaction between fuel and oxidizer at catalyst surface, different from conventional combustion. This experimental study presents the investigation on combustion characteristics of the model catalytic combustor(1㎾). Various effects on the performances of the catalytic combustor are observed, depending on the operating condition. Consequently, design point of combustor system is a fix on and try to scale up the catalyst combustor(25㎾).