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

• 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. [ABSTRACT FROM AUTHOR]