Improved cooling process and installation, in particular for...

Details Improved cooling process and installation, in particular for... Improved cooling process and installation, in particular for...

F - Mech Eng,Light,Heat,Weapons

25

J

F25J 1/02 (2006.01)

Patent

CA 2209723

In a process or apparatus for liquefying natural gas, a refrigerating mixture is compressed in a penultimate stage (1A) of a plurality of stages of a compression unit (1); the mixture is partially condensed (at 3A) in order to cool it substantially to ambient temperature; the condensed mixture is separated (at 12) in order to obtain a vapour fraction and a liquid fraction; the said vapour fraction is cooled and partially condensed; the resultant vapour fraction is sent to the final compression stage (1C), and at least the high pressure vapour fraction and said liquid fraction are cooled, expanded and circulated in at least first heat exchange means (5) with the fluid to be cooled. Moreover, according to the invention, during the condensation of the said vapour fraction, this vapour fraction derived from the separation of the condensed mixture (at 12) is cooled by circulating it in a heat exchange with a refrigerating fluid, in second heat exchange means (18).

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