LIQUEFACTION METHOD AND DEVICE Russian patent published in 2014 - IPC F25J1/02 

FIELD: heating.

SUBSTANCE: supplied gas is liquefied using a closed refrigerating system in which flow (150) of cooled compressed gaseous cooling agent expands (136) to provide the first flow (154) of expanded gaseous cooling agent that is actually vapour and is used for cooling and liquefaction of flow (100) of supplied gas by means of indirect heat exchange (110). Flow (102) of supplied liquefied gas is preferably supercooled by indirect heat exchange (112) with the second flow (172) of expanded gaseous cooling agent that is actually vapour too and can be represented with flow (170) of cooled compressed gaseous cooling agent or some part of the first flow (152) of expanded gaseous cooling agent. Cooling capacity for flow (146) of compressed gaseous cooling agent is provided by part (16) of the first flow (152) of expanded gaseous cooling agent; with that, gaseous cooling agent (156) is partially heated by means of the above heat exchange (11) with supplied gas and/or the second flow (174) of expanded gaseous cooling agent, which is heated by means of the above supercooling (112).

EFFECT: improving safety and reliability.

15 cl, 13 dwg