Gas liquefaction method and apparatus

Details Gas liquefaction method and apparatus Gas liquefaction method and apparatus

1986-11-03

1988-04-26

Capossela, Ronald C.

Refrigeration

Processes

Circulating external gas

62 38, 62 40, F25J 306

Patent

active

047402237

ABSTRACT:
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 75 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 compressed to a pressure in the range of 75 to 90 atmospheres, 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.

REFERENCES:
patent: 3416324 (1968-12-01), Swearingen
patent: 3508413 (1970-04-01), Pryor
patent: 3596473 (1971-08-01), Streich
patent: 3616652 (1971-11-01), Engel
patent: 3677019 (1972-07-01), Olszewski
patent: 4608067 (1986-08-01), Marshall
patent: 4638638 (1987-01-01), Marshall
patent: 4638639 (1987-01-01), Marshall

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