Korean Chemical Engineering Research

The Korean Institute of Chemical Engineers (한국화학공학회)
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Performance and Economic Analysis of Natural Gas/Syngas Fueled 100 MWth Chemical-Looping Combustion Combined Cycle Plant

천연가스/합성가스 이용 100 MWth 매체순환연소 복합발전 플랜트의 성능 및 경제성 평가

  • Park, Young Cheol (Climate Change Technology Research Division, Korea Institute of Energy Research) ;
  • Lee, Tai-yong (Department of Chemical Engineering, Hongik University) ;
  • Park, Jaehyeon (Climate Change Technology Research Division, Korea Institute of Energy Research) ;
  • Ryu, Ho-Jung (Climate Change Technology Research Division, Korea Institute of Energy Research)
  • 박영철 (한국에너지기술연구원 기후변화기술연구본부) ;
  • 이태용 (홍익대학교 화학공학과) ;
  • 박재현 (한국에너지기술연구원 기후변화기술연구본부) ;
  • 류호정 (한국에너지기술연구원 기후변화기술연구본부)
  • Received : 2008.12.03
  • Accepted : 2009.01.23
  • Published : 2009.02.28
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Abstract

In this study, performance and economic analysis of natural gas/syngas fueled 100 MWth chemical-looping combustion (CLC) combined cycle plant were performed. Net efficiency of both cases was 53~54%, corresponding to previous research. We used Chemical Engineering Plant Cost Index and Guthrie method to evaluate plant cost. For syngas fueled CLC combined cycle plant, the plant cost was higher since lower heating value(LHV) of syngas was lower than that of natural gas and cost of electricity(COE) was also higher since the cost of syngas was higher than that of natural gas. By sensitivity analysis, it was shown that the cost of syngas should be less than 5.3 $/GJ in order to make COE lower than 5.8 ¢/kWh which was COE of natural gas fueled CLC combined cycle plant.

본 연구에서는 상용모사기를 이용하여 100 MWth 매체순환연소(CLC) 복합발전 플랜트의 성능 및 경제성 평가를 수행하였다. 원료로는 천연가스와 합성가스를 고려하였으며 원료에 따른 성능 및 발전단가를 비교, 분석하였다. 천연가스와 합성가스를 사용하는 경우 모두 발전 효율은 53~54% 수준으로 평가되었으며 이는 기존 연구와 부합하는 결과임을 확인하였다. 경제성 분석을 위해서 Chemical Engineering Plant Cost Index와 Guthrie 방법을 사용하여 장치비를 산정하였으며 합성가스의 저위발열량이 천연가스보다 낮기 때문에 장치비가 다소 높은 것을 확인하였다. 연료의 종류에 따른 발전단가 계산 결과 합성가스의 가격이 5.3 $/GJ 정도 되는 경우에 천연가스를 이용하는 경우의 발전단가인 5.8 ¢/kWh보다 낮아지는 것으로 나타났다.

Keywords

Acknowledgement

Supported by : 지식경제부

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