Abstract A combined cooling system has been developed based upon a Joule-Thomson (J-T) gas mixture refrigerator and a melting-type thermal storage device. The system provides for high stability of the cryogenic load temperature within the 84 to 90 K temperature range for loads between 0.1 and 2.0 watts. To achieve a 1 to 5 year operational life, the J-T refrigerator uses a double-stage lubrication-free compressor with permanent lubrication of its bearings, and pistonto-bore sealing via non-wearing clearance seals. The cryocooler is designed primarily for stationary or mobile machinery that requires a long-life, high-reliability, cryogenic cooling capability. It was assumed in the design that the most critical factors were provision for a high degree of temperature stability, operational availability, and long-term reliability; there was no strict limitation on weight or power consumption for the cooling system. The developed scheme is simple in concept, provides relatively high efficiency, and additionally achieves low levels of mechanical and electromagnetic interference. It is suitable for supporting either scientific research or commercial applications, and with modification, could also be used on a spacecraft.


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    Title :

    Long-Life Cryocooler for 84-90 K


    Contributors:

    Published in:

    Publication date :

    2002-01-01


    Size :

    7 pages




    Type of media :

    Article/Chapter (Book)


    Type of material :

    Electronic Resource


    Language :

    English




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