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

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

Energy, 2023, vol. 278, issue PA

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.

Keywords: Reliquefaction performance; Boil-off gas reliquefaction system; LNG subcooling System; Cargo tank heat removal performance; LNG carriers (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:278:y:2023:i:pa:s0360544223012860

DOI: 10.1016/j.energy.2023.127892

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