The loading process of small LNG carrier in onshore LNG terminal will be charged a processing fee, which affects the economy of the small LNG carrier transportation. The shipping cost can be reduced by ship to ship transfer in the Yangtze River Estuary. However, a large amount of BOG gas would be generated because of the heat leak of the LNG carrier and the energy input during the loading process. If it is not handled properly, it will cause a huge amount of BOG relief which lead to LNG loss and pollution. To achieve carbon peak and neutrality goals, it is important to realize the zero BOG emission and the re-liquefied of BOG during STS transfer operation. In this paper, the relationship between BOG generation and operating conditions is investigated, the influence law of various parameters on BOG generation of the loading process is calculated, and the optimistic parameters of operation conditions and the suggestion of BOG Re-Liquefied Installation are proposed for the selected LNG carrier.
During LNG ship-to-ship transfer operation, the generation of BOG will lead to cabin pressure rise. If not handled in time, the superfluous BOG could only be discharged into a special combustion device for combustion, resulting in unnecessary loss of LNG products and environmental pollution, and will increase carbon emissions in the operation of the STS transfer. Therefore, it is significant to study the amount of BOG generated during LNG STS transfer operation and put forward corresponding control measures and recovery methods according to the influence rule of the amount of BOG generated, so as to reduce the generation of BOG during LNG STS transfer operation (Endao, et.al, 2021).
This paper focuses on the study of BOG generation in the transfer operation of different LNG ships, analyzes the main influencing factors of BOG generation in the transfer operation, and proposes reasonable solutions to reduce BOG loss during STS transfer operation and suggestions of BOG Re-Liquefied Installation for the selected LNG carrier
