A two-phase heat transport system, the Thermal Bus Technology Demonstrator (TBTD), has been built and tested for NASA Johnson Space Center for application on Space Station. The loop is a separated two-phase system that uses evaporator flow control valves and liquid condenser flooding to achieve temperature control. Both ambient and thermal vacuum tests have been computed in NASA's Chamber A initially using Freon-II and then ammonia as the working fluid. Overall, the tests were quite successful, with the bus achieving all major test objectives, including operation at 19.5 kW and set points at 35 F (1.7 Cel), 70 F (21.1 Cel) and 104 F (40.0 Cel), load sharing, asymmetrical heating and isothermally around the loop. Low plate to vapor temperature drops, e.g., 4 F (2.2 Cel) at 5 kW were obtained for the monogroove cold plate using ammonia and are indicative of the high evaporative film coefficients obtainable with this design. As expected, testing uncovered areas where loop performance could be improved, such as use of a reservoir sensed cold plate, and possible elimination of the regenerator and subcooler.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen


    Exportieren, teilen und zitieren



    Titel :

    Thermal test results of the two-phase thermal bus technology demonstration loop


    Weitere Titelangaben:

    Waermeversuchsergebnisse mit einem Demonstrationskreislauf der Zweiphasen Thermal Bus Technologie


    Beteiligte:
    Edelstein, F. (Autor:in) / Liandris, M. (Autor:in) / Rankin, J.G. (Autor:in)

    Erschienen in:

    AIAA-Papers ; Jun ; 1-8


    Erscheinungsdatum :

    1987


    Format / Umfang :

    8 Seiten, 16 Bilder, 8 Quellen


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Thermal test results of the two-phase thermal bus technology demonstration loop

    EDELSTEIN, FRED / LIANDRIS, MARIA / RANKIN, J. | AIAA | 1987


    Thermal Test of an Ammonia Two-Phase Loop Results of Condenser Study

    Lallemand, M. / Andre, S. / Lafon, T. et al. | SAE Technical Papers | 1991


    Fission Surface Power Technology Demonstration Test Results

    Briggs, Maxwell H. / Gibson, Marc A. / Geng, Steven M. et al. | AIAA | 2016



    Solar Thermal Propulsion IHPRPT Demonstration Program Results

    S. R. Wassom / G. D. Farmer / M. R. Holmes | NTIS | 2000