대한기계학회논문집B (Transactions of the Korean Society of Mechanical Engineers B)

  • 제34권1호
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  • Pages.35-43
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  • 2010
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  • 1226-4881(pISSN)
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  • 2288-5324(eISSN)
대한기계학회 (The Korean Society of Mechanical Engineers)
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물을 재순환하는 순산소 발전 시스템의 작동조건 변화에 따른 성능해석

Parametric Analysis of the Performance of Water Recirculated Oxy-Fuel Power Generation Systems

  • Park, Byung-Chul (School of Mechanical and Aerospace Engineerinrg, Seoul National University) ;
  • Sohn, Jeong-Lak (School of Mechanical and Aerospace Engineerinrg, Seoul National University) ;
  • Kim, Tong-Seop (School of Mechanical Engineering, Inha University) ;
  • Ahn, Kook-Young (Korea Institute of Machinery and Materials) ;
  • Kang, Shin-Hyoung (School of Mechanical and Aerospace Engineerinrg, Seoul National University) ;
  • Lee, Young-Duk (Korea Institute of Machinery and Materials)
  • 발행 : 2010.01.01
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초록

본 연구에서는 물을 재순환하는 이상적인 순산소 발전시스템의 작동조검 변화에 따른 성능해석을 수행하였다. 순산소 발전시스템에서의 터빈은 작동유체의 연소기 출구온도에 따라 증기터빈 또는 가스터빈을 사용할 수 있다. 본 연구의 순산소 사이클에서는 터빈입구온도를 가스터빈 수준으로 가정하였으며, 터빈출구의 과열도 증대를 위해 재열시스템을 채택하였다. 또한 터빈출력 증대를 위해 터빈출구 압력을 진공상태로 가정하였으며, 이에 따라 가스터빈 출구에서 추가의 팽창과정이 요구된다. 터빈입구온도, 압력비, 응축기압력과 같은 중요 작동 조건의 변화에 따른 시스템 성능이 해석되었으며, 시스템 구성 변화에 따른 효율 변화도 검토하였다. 결론에서는 성능을 최적화시키면서 고순도의 이산화탄소 회수가 가능한 순산소 발전시스템의 최적 작동조건을 제안하였다.

In this study, an ideal water-recirculated oxy-fuel power generation system is proposed. The results of parametric studies of the performance characteristics of the system are discussed. For a given choice of the turbine inlet temperature, the turbine, which produces power, can be either a gas or a steam turbine. For maximum efficiency, the turbine inlet temperature is selected as the level of state-of-the-art gas turbines and the reheat cycle may be adopted not only to enhance the turbine power but also to maintain dryness of the water with a turbine exhaust temperature that is as high as possible. To obtain a low condensation temperature for a high purity of $CO_2$, a relatively low pressure expansion process may be added. Finally, the performance of the water-recirculated oxy-fuel power generation system is discussed with reference to various operating parameters and system configurations. The optimal operating conditions for high performance and a high purity of $CO_2$ are proposed.

키워드

참고문헌

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피인용 문헌

  1. Enhancement of MCFC System Performance by Adding Bottoming Cycles vol.34, pp.10, 2010, https://doi.org/10.3795/KSME-B.2010.34.10.907