SHIP Russian patent published in 2020 - IPC B63B25/16 B63H21/38 F17C9/02 F17C6/00 

FIELD: vessels and other watercrafts.

SUBSTANCE: invention relates to water transport and, more specifically, to a vessel including a system for repeated liquefaction of stripping gas remaining after use as engine fuel among the evaporating gases formed in the storage tank. Disclosed is a vessel, which includes a liquefied gas storage tank. Vessel comprises: a first compressor which compresses one or more portions of stripping gas discharged from the storage container; a second compressor which compresses another portion of stripping gas discharged from the storage container; a booster compressor which compresses one portion of stripping gas which is compressed by at least one of the first compressor and/or the second compressor; a first heat exchanger which performs heat exchange of stripping gas compressed by a booster compressor and stripping gas discharged from the storage container; refrigerant decompression device, which expands another part of stripping gas, which is compressed by at least one of first compressor and/or second compressor; a second heat exchanger which cools by means of a fluid medium expanded by a coolant decompression device, as a coolant, a stripping gas which is compressed by a booster compressor and performs heat exchange by means of a first heat exchanger; an additional compressor which compresses the coolant passing through the coolant decompression device and the second heat exchanger; and a first decompression device which expands the fluid medium which is compressed by the booster compressor and then cooled by the first heat exchanger and the second heat exchanger, wherein the additional compressor is driven by the energy generated when the fluid expands by the coolant decompression device.

EFFECT: higher efficiency of repeated liquefaction of stripping gas.

22 cl, 9 dwg