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                Liquefaction/ re-liquefaction system

                High-pressure jet reliquefaction system

                The evaporation gas in the LNG storage tank is pressurized to more than 200 barG after multi-stage compression, thereafter the compressed high-pressure gas enters the cold box and is cooled by pre-cooling heat exchanger, refrigerant evaporator and heat exchanger in turn before gas enters the eductor for expansion. After the expansion the gas-liquid mixture formed after expansion enters the separator and the LNG liquid is separated into the LNG storage tank. The gas in the tank is sucked out by the eductor and BOG compressor for the next round of compression and refrigeration cycle.
                 

                System features

                • The system process is simple, the main refrigeration component is the injector, its structure is simple, safe and reliable, no maintenance
                • Modular design, save installation space
                • The unit power consumption is about 0.55~0.65KWh/kg LNG
                • It is suitable for the needs of small and medium-sized LNG carriers and LNG fuelled ships with large tanks where  the boiloff gas development needs to be controlled
                 





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                High pressure jet liquefaction system

                The feed gas is compressed to 12bar and introduced into the suction port of the high-pressure gas booster unit through the aftercooler, and then compressed to 200 barG in multiple stages. The compressed gas thereafter enters the cold box and is initially cooled by the evaporation gas of the LNG storage tank, the high-pressure cryogenic gas is expanded by the injector in a gas-liquid mixed state in the condensation tank and the separated liquid is rejected into the LNG storage tank. The evaporation gas generated in the storage tank is continuously sucked out by the vacuum port of the ejector and mixed with the feed gas into the gas booster compressor to achieve a continuous liquefaction cycle.
                 

                System features

                ● The system process is simple, the main refrigeration component is the injector, its structure is simple, safe and reliable, no maintenance
                ● Modular design, save installation space
                ● The unit power consumption is about 0.6~0.7KWh/kg LNG
                ● Suitable for FSRU




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