Review of the design and optimization of BOG re-liquefaction process for LNG carriers

• Published in: Cryogenics (Guildford) 2024-09, Vol.142, p.103924, Article 103924
• Main Authors: Liu, Lesheng, Guo, Ting, Zhou, Yanyan, Shen, Jiubing, Jiang, Qingfeng, Tong, Xing
• Format: Article
• Language: English
• Subjects: BOG dynamic and steady state simulation comparison; Comprehensive evaluation of BOG re-liquefaction process; Development and prospect of BOG re-liquefaction technology; Multi-angle optimization of BOG re-liquefaction process
• ISSN: 0011-2275
• DOI: 10.1016/j.cryogenics.2024.103924

•The steady state and dynamic BOG re-liquefaction techniques are analyzed and compared in this research.•The existing steady-state simulation techniques are summarized and analyzed from three aspects: structure, parameters and optimization methods.•This paper analyzes the technology of dynamic simulation and points out the opportunities and difficulties in the future development of BOG dynamic simulation.•The existing system evaluation parameters are summarized and the system is analyzed from the comprehensive point of view. Over the past few years, liquefied natural gas (LNG) evaporated gas re-liquefaction technology has rapidly developed. This technology is particularly useful in trans-oceanic LNG trade, which has grown to be a hot sector in the world’s energy trade. And there are several limitations on board. Reducing energy consumption, improving efficiency, and lowering costs are crucial factors in the BOG re-liquefaction process. This review provides a comprehensive review of the recent advancements in the design and optimization of BOG re-liquefaction processes. It includes a detailed analysis and comparison of existing BOG re-liquefaction technologies, and specifically discusses two types of re-liquefaction processes: dynamic and steady-state. Furthermore, this review examines different perspectives and directions for improving these two re-liquefaction technologies. Finally, the challenges faced by the BOG re-liquefaction process for LNG carriers are presented, along with future directions for addressing these challenges.