Patent ID: 6250096
Filing Date: 2001-06-26
Classification: F25B,F25J

Abstract:
A method for generating a cold gas for supplying refrigeration comprising:(A) compressing a nitrogen-containing working gas and cooling the compressed nitrogen-containing working gas;(B) expanding the cooled nitrogen-containing working gas to produce a cold nitrogen-containing working gas, and warming the cold nitrogen-containing working gas to supply refrigeration to a heat load;(C) further warming the nitrogen-containing working gas by indirect heat exchange with the compressed nitrogen-containing working gas to effect a portion of said cooling of the compressed nitrogen-containing working gas; and(D) compressing a refrigerant fluid, expanding the compressed refrigerant fluid to cool the refrigerant fluid, and warming the cooled refrigerant fluid by indirect heat exchange with the compressed nitrogen-containing working gas to effect another portion of said cooling of the compressed nitrogen-containing working gas.