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ASPEN PLUS를 이용한 석탄화력발전시스템의 엑서지분석
Exergy Analysis of a Coal Fired Power Plant by ASPEN PLUS
HWAHAK KONGHAK, October 1999, 37(5), 752-758(7), NONE
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Abstract
본 연구는 화학공정 전용 시뮬레이션 코드인 ASPEN PLUS를 이용하여, 500 MW급 대용량 석탄화력발전소에 대한 성능해석을 수행하였다. 이를 위하여 엑서지분석 유저모델과 증기터빈 성능해석 모델을 개발하여 기존에 ASPEN PLUS가 분석할 수 없었던 증기터빈 시스템에 대한 정밀한 해석이 가능하도록 하였다. 또한 엑서지분석을 통하여 석탄화력발전시스템에서 비효율성의 원인을 정의하였다. 분석 결과, 보일러에서 전체 엑서지손실의 76%, 화학엑서지의 43%가 손실됨을 알 수 있었다. 보일러 내부에서는 연소반응으로 약 250 MW, 증발기에서 약 130 MW 그리고 재열기에서 약 50 MW 등의 순으로 손실이 나타났다.
In this study, a performance analysis for a 500 MW class coal fired power plant was carried out using ASPEN PLUS, a chemical process simulation code. Exergy analysis and steam turbine user models were developed to perform the analysis for the steam cycle which was not available by the existing ASPEN PLUS. Also, the cause of inefficiency in coal fired power plant was defined through the exergy analysis. From the analysis, the exergy destruction and loss in the boiler were found to be approximately 76% of total exergy and 43% of chemical exergy input, respectively. Energy losses by combustion, in the evaporator and the reheated showed about 250, 130 and 50 MW, respectively.
Keywords
References
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Joo HS, Choi CK, Kim H, HWAHAK KONGHAK, 30(5), 537 (1992)
Lee WJ, Kim SJ, Shul YG, Lee TH, HWAHAK KONGHAK, 33(5), 610 (1995)
Ahrendts J, Int. J. Energy, 5, 667 (1980)
Bejan A, Tsatsaronis G, Moran M, "Thermal Design & Optimization," John Wiley & Sons, New York (1996)
Eiserman W, Johnson P, Conger WL, Fuel Process. Technol., 3, 39 (1980)
Rubow PE, Clean Coal Reference Plant: PC/FGD, DE-AC21-89MC25117, G/C reports No. 3009 (1994)
Ong'iro A, Ugursal VL, AI Taweel AM, Heat Recov. Syst. CHP, 15, 15 (1995)
Ong'iro A, Ugursal VL, AI Taweel AM, Lajeunesse G, Appl. Thermal Eng., 16, 263 (1996)
Dunbar WR, Lior N, "Understanding Combustion Irreversibility," ASME AES-Vol. 25/HTD-Vol. 191, 81 (1991)
Harvey SM, Ph.D. Dissertation, Dartmouth College, Hanover, U.S.A. (1994)
Anheden M, Licentiate Thesis, Royal Institute and Technology, Stockholm, Sweden (1997)
