Patent ID: 6105388
Filing Date: 2000-08-22
Classification: F25J

Abstract:
A method for cooling an industrial gas comprising:(A) compressing a first multicomponent refrigerant fluid comprising at least one component from the group consisting of fluorocarbons, hydrofluorocarbons and fluoroethers and at least one component from the group consisting of fluorocarbons, hydrofluorocarbons, fluoroethers and atmospheric gases;(B) cooling the compressed first multicomponent refrigerant fluid and expanding the cooled compressed first multicomponent refrigerant fluid to generate refrigeration;(C) warming the expanded first multicomponent refrigerant fluid by indirect heat exchange with the compressed first multicomponent refrigerant fluid to effect said cooling of the compressed first multicomponent refrigerant fluid;(D) compressing a second multicomponent refrigerant fluid comprising at least one component from the group consisting of fluorocarbons, hydrofluorocarbons and fluoroethers and at least one atmospheric gas;(E) warming the expanded first multicomponent refrigerant fluid by indirect heat exchange with the compressed second multicomponent refrigerant fluid to cool the compressed second multicomponent refrigerant fluid;(F) further cooling the cooled compressed second multicomponent refrigerant fluid and expanding the further cooled second multicomponent refrigerant fluid to generate refrigeration;(G) warming the expanded second multicomponent refrigerant fluid by indirect heat exchange with the compressed second multicomponent refrigerant fluid to effect said further cooling of the compressed second multicomponent refrigerant fluid; and(H) warming the expanded second multicomponent refrigerant fluid by indirect heat exchange with industrial gas to cool said industrial gas.