Abstract The importance of long term endurance evaluation data on cryocooler technology cannot be overemphasized. As useful and important as operational data is failure analysis data and the lessons learned from those failures. During fiscal year 1999, the TRW 3503 pulse tube and the Creare Single Stage Reverse Brayton (SSRB) stopped operating during endurance evaluation at the Air Force Research Laboratory (AFRL) Cryogenic Cooling Research Facility (CCRF). On 8–9 November 1998, the TRW 3503 pulse tube cryocooler suffered a system overheat as a result of an environmental control electronics failure. The cooler kept operating throughout the overheat and continued to run after the environmental system was stabilized. The TRW 3503 continued to run with only a small performance degradation of approximately +2K over the design point with a heat load of 0.3W until it tripped and shut down on 20 April 1999. The cooler would not restart, so AFRL engineers and technicians worked with TRW to investigate the cause of the tripping. On 19 December 1998, the Creare SSRB shut down due to an enviromental system fail-safe overheat condition on the compressor. Subsequent attempts to restart the cooler were unsuccessful. The compressor started normally, but the free spinning turboexpander (TE) was not able to lift off of its bearings and start spinning. AFRL personnel worked with Creare to investigate the cause of the TE’s inability to lift up and spin. This paper will discuss the investigation of both cryocoolers’ inability to restart, initial observations in post-endurance disassembly, and lessons learned from these experiences.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Initial Observations from the Disassembly and Inspection of the TRW 3503 and Creare SSRB


    Beteiligte:

    Erschienen in:

    Erscheinungsdatum :

    2002-01-01


    Format / Umfang :

    7 pages




    Medientyp :

    Aufsatz/Kapitel (Buch)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




    Initial Observations from the Disassembly and Inspection of the TRW 3503 and Creare SSRB

    Tomlinson, B. J. / Yoneshige, C. H. / Martin, M. L. | British Library Conference Proceedings | 2001


    Nr. 3503

    DataCite | 1912


    2000-01-3503 Internet-based Vehicle Communication Network

    Skibinski, J. / Trainor, J. / Reed, C. et al. | British Library Conference Proceedings | 2000


    2004-01-3503 ASA Race Car Force Deflection Characteristics

    Gideon, T. / Howe, C. | British Library Conference Proceedings | 2004


    Improved Aircraft Departure Modeling for Environmental Impact Assessment (AIAA 2018-3503)

    Lim, Dongwook / LeVine, Matthew J. / Ngo, Vu et al. | British Library Conference Proceedings | 2018