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Cooling system for superconducting magnet

United States Patent

5,848,532
December 15, 1998
View the Complete Patent at the US Patent & Trademark Office
A cooling system is configured to control the flow of a refrigerant by controlling the rate at which the refrigerant is heated, thereby providing an efficient and reliable approach to cooling a load (e.g., magnets, rotors). The cooling system includes a conduit circuit connected to the load and within which a refrigerant circulates; a heat exchanger, connected within the conduit circuit and disposed remotely from the load; a first and a second reservoir, each connected within the conduit, each holding at least a portion of the refrigerant; a heater configured to independently heat the first and second reservoirs. In a first mode, the heater heats the first reservoir, thereby causing the refrigerant to flow from the first reservoir through the load and heat exchanger, via the conduit circuit and into the second reservoir. In a second mode, the heater heats the second reservoir to cause the refrigerant to flow from the second reservoir through the load and heat exchanger via the conduit circuit and into the first reservoir.
Gamble; Bruce B. (Wellesley, MA), Sidi-Yekhlef; Ahmed (Framingham, MA)
American Superconductor Corporation (Westborough, MA)
08/ 844,991
April 23, 1997
This invention arose in part out of research pursuant to Subcontract No. QZ001 awarded by the Department of Energy under Prime Contract No. DE-FC36-93CH10580.