Gas liquefaction method and apparatus

Details Gas liquefaction method and apparatus Gas liquefaction method and apparatus

F - Mech Eng,Light,Heat,Weapons

25

J

162/130

F25J 1/02 (2006.01)

Patent

CA 1298541

ABSTRACT GAS LIQUEFACTION METHOD AND APPARATUS The present invention relates to the liquefaction of a permanent gas comprising nitrogen. The temperature of the permanent gas stream at a pressure in the range of to 90 atmospheres is reduced to below its initial temperature. Providing at least part of the necessary refrigeration, a single nitrogen working fluid cycle is performed in which the nitrogen working fluid is com- pressed to a pressure in the range of 75 to 90 atmos- pheres, cooled to a temperature in the range of 170 to 200 K, work expanded to a temperature in the range of 107 to 120 K, and warmed by heat exchange countercurrently to the permanent gas stream, thereby providing refrigeration for the stream.

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