Patent ID: 6357257
Filing Date: 2002-03-19
Classification: F25B,F25J

Abstract:
A method for cooling industrial gas comprising:(A) compressing a gaseous azeotropic mixture, and condensing the compressed azeotropic mixture; (B) expanding a first portion of the condensed azeotropic mixture to generate refrigeration, and vaporizing the refrigeration bearing azeotropic mixture first portion by indirect heat exchange with the compressed azeotropic mixture to effect the said condensation of the compressed azeotropic mixture; (C) subcooling a second portion of the condensed azeotropic mixture and expanding the subcooled azeotropic mixture second portion to generate high level refrigeration; (D) vaporizing the high level refrigeration bearing azeotropic mixture second portion by indirect heat exchange with compressed refrigerant fluid to provide cooled, compressed refrigerant fluid; (E) expanding the cooled compressed refrigerant fluid to generate low level refrigeration; and (F) warming the low level refrigeration bearing refrigerant fluid by indirect heat exchange with industrial gas to cool the industrial gas.