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US 6,644,038 B1Granted
Multistage pulse tube refrigeration system for high temperature super conductivity
AssigneePraxair Technology, Inc.
InventorsArun Acharya, Bayram Arman, John Henri Royal, Dante Patrick Bonaquist
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Abstract
A pulse tube refrigeration system wherein the pulse tube working gas is cooled to a defined first stage temperature and is brought to a defined second stage temperature by operation of a regenerator and pulse tube, which are in flow communication through a cold heat exchanger, prior to providing refrigeration to a high temperature superconductor.
Claims4
A method for providing refrigeration for high temperature superconductivity comprising:
- (A) generating an oscillating pulse tube working gas, and cooling the oscillating pulse tube working gas to a first stage temperature within the range of from 50 to 150 K by indirect heat exchange with refrigerant fluid from a refrigeration system;
- (B) cooling the oscillating pulse tube working gas to a second stage temperature within the range of from 4 to 70 K by direct heat exchange with cold regenerator media to produce cold pulse tube gas;
- (C) expanding the cold pulse tube working gas in a pulse tube to generate refrigeration for cooling regenerator media;
- and
- (D) providing refrigeration from the cold pulse tube working gas for high temperature superconductivity, and wherein the refrigeration system provides refrigeration for another high temperature superconductivity application at a higher temperature than that provided by the cold pulse tube working gas.
2 more elements
Dependencies are inferred from the claim text.