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US 6,065,305 AGranted
Multicomponent refrigerant cooling with internal recycle
AssigneePraxair Technology, Inc.
InventorsBayram Arman, Walter Joseph Olszewski, Joseph Alfred Weber, Dante Patrick Bonaquist, Arun Acharya, John Henri Royal
Life of this patent
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Abstract
A system for cooling a fluid particularly to a cryogenic temperature wherein a multicomponent refrigerant fluid is partially condensed, the liquid used to generate refrigeration to cool the product by recycle into an upstream portion of the warming leg of the refrigeration circuit, and the vapor, having a different composition than the liquid, is used to generate refrigeration at a colder temperature for further cooling of the product.
Claims17
A method for cooling a product fluid comprising:
- (A) compressing a multicomponent refrigerant fluid comprising at least two components having different volatilities;
- (B) partially condensing the compressed multicomponent refrigerant fluid and separating the resulting partially condensed multicomponent refrigerant fluid into a liquid portion and a remaining portion;
- (C) expanding the liquid portion to generate refrigeration and vaporizing the expanded liquid portion by indirect heat exchange with product fluid to produce cooled product fluid;
- and
- (D) further cooling at least some of the remaining portion, expanding the further cooled remaining portion to generate refrigeration, and warming the expanded remaining portion by indirect heat exchange with cooled product fluid to produce further cooled product fluid.
2 more elements
Dependencies are inferred from the claim text.