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

  • 제36권7호
  • /
  • Pages.711-719
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  • 2012
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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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유기 랜킨 사이클을 이용한 선박 주기관 폐열 회수 시스템의 열역학적 분석

Thermodynamic Analysis of the Organic Rankine Cycle as a Waste Heat Recovery System of Marine Diesel Engine

  • 진정근 (삼성중공업 조선해양연구소) ;
  • 이호기 (삼성중공업 조선해양연구소) ;
  • 박건일 (삼성중공업 조선해양연구소) ;
  • 최재웅 (삼성중공업 조선해양연구소)
  • Jin, Jung-Kun (Marine Research Institute, Samsung Heavy Industries) ;
  • Lee, Ho-Ki (Marine Research Institute, Samsung Heavy Industries) ;
  • Park, Gun-Il (Marine Research Institute, Samsung Heavy Industries) ;
  • Choi, Jae-Woong (Marine Research Institute, Samsung Heavy Industries)
  • 투고 : 2011.12.21
  • 심사 : 2012.04.30
  • 발행 : 2012.07.01
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초록

유기 랜킨 사이클(ORC)을 이용한 선박 주기관 폐열 회수 시스템의 열역학적 분석을 수행하고 적용 가능성 및 효과를 검토하였다. 이론 해석에서는 ORC 와 ORC 에 열을 전달하기 위한 열전달 루프, 냉각수 공급 펌프를 모두 고려하여 전체 효율을 예측하였다. ORC 사이클의 성능은 증발기와 응축기의 특성과 열전달 루프의 온도 조건을 달리하여 평가되었으며 그 특성을 사이클 효율과 시스템 효율 관점에서 비교하였다. 수에즈막스 유조선에 대하여 ORC 사이클은 $250^{\circ}C$ 이하의 폐열 조건에 대하여 약 10%정도의 열효율을 보였다. ORC 이용하여 엔진 폐열로부터 주기관 출력의 3~4%에 해당하는 전력을 생산할 수 있으며 수에즈막스 유조선에 적용 시, 정상 운항시 필요한 전력의 59~69%를 ORC 생산 전력으로 대체하여 운항 중 연료 소모량을 절감시킬 수 있는 것으로 나타났다.

A thermodynamic analysis and a feasibility study on the organic Rankine cycle (ORC) as a waste heat recovery system for a marine diesel engine were carried out. The ORC and its combined cycle with the engine were simulated, and its performance was estimated theoretically using R245fa. A parametric study on the performance of the ORC system was carried out under different temperature conditions of the heat transfer loop and specification of the heat exchanger. According to the thermodynamic analysis, ~10% of the thermal efficiency of the cycle was able to be realized with the low temperature heat source below $250^{\circ}C$. The electric power output of the ORC was estimated to be about 4% of the mechanical power output of the engine, considering additional pumps for cooling water and circulation of the heat transfer medium. According to the present study, the electric power generated by the ORC is about 59%-69% of the required power, and it is possible to reduce the fuel consumption under normal seagoing conditions.

키워드

참고문헌

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