Refrigeration – Processes – Circulating external gas
Patent
1992-08-10
1993-12-21
Capossela, Ronald C.
Refrigeration
Processes
Circulating external gas
62 9, F25J 300
Patent
active
052712311
ABSTRACT:
A method of liquefying a low-boiling gas, in which gas is compressed to a high pressure, is cooled in heat exchange structure and is isenthalpically expanded to condense a portion of the same to liquid. The liquid being separated from residual gas and the residual gas is used to cool the heat exchange structure and is then recycled. A portion of the gas is compressed to an intermediate pressure between the high and low pressures, is isentropically expanded at a first temperature and is used to cool a relatively warm portion of heat exchange structure and is then recycled. A portion of the high pressure gas is isentropically expanded at a second temperature and used to cool a relatively cool portion of the heat exchange structure and then again isentropically expanded at a third temperature to that low pressure and returned through the heat exchange structure to cool the same and is then recycled. That first temperature is higher than the second temperature and that second temperature is higher than the third temperature. The gas is preferably nitrogen. The cycle can be part of an air separation unit, whose low pressure nitrogen product is make-up for the liquefaction cycle and whose high pressure nitrogen product is merged with the low pressure cycle gas.
REFERENCES:
patent: 3358460 (1967-12-01), Smith et al.
patent: 3677019 (1972-07-01), Olszewski
patent: 4267701 (1981-05-01), Toscano
patent: 4539028 (1985-09-01), Paradowski et al.
patent: 4636639 (1987-01-01), Marshall et al.
patent: 4638638 (1987-01-01), Marshall et al.
patent: 4846862 (1989-07-01), Cook
patent: 4894076 (1990-01-01), Dobracki et al.
Ha Bao
Tranier Jean P.
Capossela Ronald C.
L'Air Liquide Societe Anonyme pour l'Etude et, l'Exploitation de
Liquid Air Engineering Corporation
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