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US 6,293,106 B1Granted
Magnetic refrigeration system with multicomponent refrigerant fluid forecooling
AssigneePraxair Technology, Inc.
InventorsArun Acharya, Bayram Arman
Life of this patent
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Abstract
A system for generating refrigeration and providing refrigeration to a heat load at a very cold temperature which includes a forecooling circuit using a multicomponent refrigerant fluid and a magnetic refrigeration circuit which provides refrigeration to the heat load and which rejects heat into the forecooling circuit.
Claims10
A method for providing refrigeration at a very cold temperature comprising:
- (A) compressing a multicomponent refrigerant fluid, cooling the compressed multicomponent refrigerant fluid to produce cooled multicomponent refrigerant fluid, and expanding the cooled multicomponent refrigerant fluid;
- (B) magnetizing a regenerator bed of a magnetic refrigerator system to warm the regenerator bed, warming working fluid by passing it through the magnetic refrigerator system, and then passing the working fluid from the magnetic refrigerator system in indirect heat exchange with the cooled expanded multicomponent refrigerant fluid to produce cooled working fluid;
- (C) demagnetizing the regenerator bed to cool the regenerator bed, and passing the cooled working fluid through the magnetic refrigerator system to further cool the working fluid to be at a very cold temperature;
- and
- (D) passing refrigeration from the very cold temperature working fluid to a heat load.
2 more elements
Apparatus for providing refrigeration at a very cold temperature comprising:
- (A) a compressor, a multicomponent refrigerant fluid heat exchanger, means for passing fluid from the compressor to the multicomponent refrigerant fluid heat exchanger, an expansion device, and means for passing fluid from the multicomponent refrigerant fluid heat exchanger to the expansion device;
- (B) an intermediate temperature heat exchanger and means for passing fluid from the multicomponent refrigerant fluid heat exchanger to the intermediate temperature heat exchanger;
- (C) a magnetic refrigerator system comprising a bed of magnetizable bed material, means for magnetizing the magnetizable bed material, means for passing fluid from the magnetic refrigerator system to the intermediate temperature heat exchanger, and means for passing fluid from the intermediate temperature heat exchanger to the magnetic refrigerator system;
- and
- (D) a heat load and means for passing fluid from the magnetic refrigerator system in heat exchange with the heat load.
2 more elements
Dependencies are inferred from the claim text.