Review on the design and optimization of BOG re-liquefaction process in LNG ship

Liang Yin and Yonglin Ju

Energy, 2022, vol. 244, issue PB

Abstract: In recent years, liquefied natural gas (LNG) boil-off gas (BOG) re-liquefaction technologies in LNG ships have been developing rapidly as LNG trade across the sea has become a hot spot in global energy trade. However, there are lots of restrictions on board and BOG re-liquefaction is an energy-intensive industrial process. Reducing energy consumption, improving efficiency and reducing costs play an important role in the BOG re-liquefaction processes. In this paper, the detailed progress of design and optimization for the BOG re-liquefaction processes in recent years are summarized. Two categories of the re-liquefaction processes, indirect re-liquefaction processes and direct re-liquefaction processes, are specifically discussed. The indirect re-liquefaction process includes the nitrogen refrigeration cycle re-liquefaction process, the mixed refrigerant cycle re-liquefaction process and the oxygen refrigeration cycle re-liquefaction process. Finally, the challenges and the future directions to address these challenges for the BOG re-liquefaction process in LNG ships are proposed.

Keywords: BOG re-Liquefaction; Energy consumption; Efficiency; Optimization (search for similar items in EconPapers)
Date: 2022
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Citations: View citations in EconPapers (4)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:244:y:2022:i:pb:s0360544221033144

DOI: 10.1016/j.energy.2021.123065

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