A Study on the thermal pinch problem in the counterflow heat exchanger

역대향류 열교환기의 열 핀치(thermal pinch)에 관한 연구

  • 최성은 (한국기술교육대학교) ;
  • 진영욱 (한국기술교육대학교 기계정보공학부)
  • Published : 2008.11.15

Abstract

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.

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