The Space Cryogenic Refrigerator System (SCRS) is a Split-Stirling Cryocooler developed by Lockheed and Lucas Aerospace. The cooler uses two 20-mm compressors coupled to two 10-mm displacers via transfer tubes. It is required to produce 2 W of thermal cooling at an instrument interface temperature of 65 deg K for less than 100 W of input power into the cryocooler's controller. The controller uses Lockheed's proprietary Digital Error Correction (DECS) control system to provide cryocooler operation and vibration control. The cooler was tested in Lockheed's Cryocooler Thermal Vacuum Chamber by thermally soaking the cooler and electronics to 220 deg K for 48 hours and then warming the system and starting it at 250 deg K. The system was operated at heat rejection temperatures of 250 deg K, 270 deg K, 300 deg K and 320 deg K in a vacuum environment. System power, temperature control, temperature stability, and external cooler and controller temperatures were measured during the testing which was conducted at steady-state conditions for eight hours except for at 300 deg K, which was conducted for over forty-eight hours. The cooler successfully demonstrated 2 W of cooling at 65 deg K with a 300 deg K heat rejection for 125 W of total system input power. Although it did not meet the 100 W input power requirement, it did show excellent thermal margin at 65 deg K (80 % of maximum compressor stroke) and temperature control and stability.


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    Titel :

    Space Cryogenic Refrigerator System (SCRS) thermal performance test results


    Weitere Titelangaben:

    Ergebnisse von Wärmeleistungsprüfungen des Raum-Kryokühlsystems (SCRS)


    Beteiligte:
    Spradley, I.E. (Autor:in) / Foster, W.G. (Autor:in)


    Erscheinungsdatum :

    1995


    Format / Umfang :

    10 Seiten, 13 Bilder, 2 Tabellen



    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




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