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US 6,076,372 AGranted
Variable load refrigeration system particularly for cryogenic temperatures
AssigneePraxair Technology, Inc.
InventorsArun Acharya, Bayram Arman, Walter Joseph Olszewski, Dante Patrick Bonaquist, Joseph Alfred Weber
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Abstract
A method for generating refrigeration, especially over a wide temperature range including cryogenic temperatures, wherein a non-toxic, non-flammable and low or non-ozone-depleting mixture is formed from defined components and maintained in variable load form through compression, cooling, expansion and warming steps in a refrigeration cycle.
Claims18
A method for generating refrigeration comprising:
- (A) compressing a variable load refrigerant mixture 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, hydrochlorofluorocarbons, fluoroethers, atmospheric gases and hydrocarbons to produce a compressed variable load refrigerant mixture;
- (B) cooling the compressed variable load refrigerant mixture to produce a cooled compressed variable load refrigerant mixture;
- (C) expanding the cooled, compressed variable load refrigerant mixture and generating refrigeration to produce a lower temperature variable load refrigerant mixture;
- and
- (D) warming the lower temperature variable load refrigerant mixture.
2 more elements
A method for generating refrigeration at a cryogenic temperature comprising:
- (A) compressing a variable load refrigerant mixture 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, hydrochlorofluorocarbons, fluoroethers, atmospheric gases and hydrocarbons to produce a compressed variable load refrigerant mixture;
- (B) cooling the compressed variable load refrigerant mixture to produce a cooled compressed variable load refrigerant mixture;
- (C) expanding the cooled, compressed variable load refrigerant mixture and generating refrigeration to produce a lower temperature variable load refrigerant mixture at a cryogenic temperature;
- and
- (D) warming the lower temperature variable load refrigerant mixture.
2 more elements
Dependencies are inferred from the claim text.