New & Renewable Energy (신재생에너지)

Korean Society for New and Renewable Energy (한국신·재생에너지학회)
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Exergy Analysis of Waste Energy Recovery System in Regasification Process of LNG FSRU

LNG FSRU의 재기화 공정에서 폐에너지회수시스템의 엑서지 분석

  • Han, Seoung Hyun (Division of Mechanical and Automotive Engineering, Hoseo University) ;
  • Jo, Jae Ho (Division of Mechanical and Automotive Engineering, Hoseo University) ;
  • Kwon, Jeong-Tae (Division of Mechanical and Automotive Engineering, Hoseo University) ;
  • Park, Kyoungwoo (Division of Mechanical and Automotive Engineering, Hoseo University) ;
  • Choi, Byung Chul (Division of Mechanical and Automotive Engineering, Hoseo University)
  • Received : 2022.05.04
  • Accepted : 2022.06.16
  • Published : 2022.06.25
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Abstract

In this study, the exergy characteristics were analyzed, according to the mass flow rate of the propane working fluid and the pressure change in the turbine inlet, for the efficient recovery of cold energy and exhaust heat by the waste energy recovery system applied to the LNG FSRU regasification process. When the turbine inlet pressure and mass flow rate of the Primary Rankine Cycle were kept constant, the exergy efficiency and the net power increased. This occurred as the turbine inlet pressure and the mass flow rate of the working fluid increased in the Secondary Rankine Cycle, respectively, and the maximum values were confirmed. In this regard, the fluctuations in the exergy rate flowing into and out of the system and the exergy rate destroyed by pumps, evaporators, turbines, and LNG heat exchangers (condensers) were examined in detail.

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Acknowledgement

이 논문은 2021년도 호서대학교의 재원으로 학술연구비 지원을 받아 수행된 연구임(과제번호: 20210474).

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