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Process design of advanced LNG subcooling system combined with a mixed refrigerant cycle

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  • Lee, Jaejun
  • Son, Heechang
  • Yu, Taejong
  • Oh, Juyoung
  • Park, Min Gyun
  • Lim, Youngsub

Abstract

LNG subcooling system is a conventional system to keep the pressure of an LNG storage tank for LNG carriers, but has a weak point of the low efficiency resulting in a new BOG reliquefaction system. This study suggests a new LNG subcooling system combined with mixed refrigerant cycle (MR-SLNG), which can increase efficiency significantly. The results show the coefficient of performance (COP) of the system becomes 2.5 times higher than that of the conventional LNG subcooling system based on a reverse Brayton cycle (RBC-SLNG). Additionally, MR-SLNG can be a compact system because the volumetric flowrate of the refrigerant compressor decreased to 8.9%, which brings additional benefits to the ship design.

Suggested Citation

  • Lee, Jaejun & Son, Heechang & Yu, Taejong & Oh, Juyoung & Park, Min Gyun & Lim, Youngsub, 2023. "Process design of advanced LNG subcooling system combined with a mixed refrigerant cycle," Energy, Elsevier, vol. 278(PA).
    • Handle: RePEc:eee:energy:v:278:y:2023:i:pa:s0360544223012860
    DOI: 10.1016/j.energy.2023.127892
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    References listed on IDEAS

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