The LNG carriers have been propelled by steam turbines and the LNG boil-off(BOG) has been used as fuel or vented. However, as the alternative propulsion systems such as diesel engines are being equipped on the LNG carriers for better fuel efficiency, a need for the LNG BOG re-liquefaction system that liquefies the BOG and sends the liquid BOG back to the LNG cargo has arisen in recent years. This study investigates the design of the BOG re-liquefaction system based on the reverse Brayton refrigeration cycle. The thermodynamic and heat exchanger analysis are carried out and the limitations to the system performance are discussed.

Abstract
 1. 서론
 2. BOG 재액화 시스템
 3. BOG 재액화 시스템 해석
  3.1 시스템 상태
  3.2 시스템 성능
  3.3 열교환기
 4. 요약 및 결론
 5. 참고문헌

• 최성은 | Choi Sung Eun
• 진영욱 | Chin Young Wook