FIELD: maritime transport.
SUBSTANCE: invention relates to a boil-off gas re-liquefaction system (BOG) on ships. The proposed BOG re-liquefaction system comprises of: a compressor in which the BOG is compressed; a heat exchanger in which the BOG compressed by the compressor is cooled by heat exchange using the BOG uncompressed as the refrigerant; a pressure reducer located downstream of the heat exchanger and reducing the pressure of the fluid cooled by the heat exchanger; and at least one combination selected from a combination of a first temperature sensor located upstream of the cold fluid passage of the heat exchanger and a fourth temperature sensor located after the hot fluid passage of the heat exchanger, a combination of a second temperature sensor located downstream of the cold fluid passage of the heat exchanger, and a third temperature sensor located upstream of the hot fluid passage of the heat exchanger, and a combination of a first pressure sensor located upstream of the hot fluid passage of the heat exchanger and a second pressure sensor located downstream of the hot fluid passage of the heat exchanger, said compressor comprising at least one cylinder operating in oil lubrication mode. EFFECT: invention provides the efficiency of the BOG re-liquefaction system and efficient removal of lubricating oil in this system.
13 cl, 13 dwg
