Gas refrigeration method and apparatus

Details Gas refrigeration method and apparatus Gas refrigeration method and apparatus

F - Mech Eng,Light,Heat,Weapons

25

J

162/141

F25J 1/00 (2006.01) F25J 1/02 (2006.01)

Patent

CA 1262433

ABSTRACT OF THE DISCLOSURE There is disclosed a method of liquefying a permanent gas stream, comprising the steps of reducing the temperature of the permanent gas stream at elevated pressure to below its critical temperature, and performing at least two working fluid cycles to provide at least part of the refrigeration necessary to reduce the temperature of the permanent gas to below its critical temperature, each such working fluid cycle comprising compressing the working fluid, cooling it, work expanding the cooled working fluid, warming the work expanded working fluid in countercurrent heat exchange with the permanent gas stream and with the working fluid being cooled, refrigeration thereby being provided for the permanent gas stream, wherein in at least one working fluid cycle, work expanded working fluid is brought into countercurrent heat exchange relationship with the permanent gas stream at a temperature below the critical temperature of the permanent gas and in the or each such cyle on completion of the work expansion the working fluid is at a pressure of at least 10 atmospheres.

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