There are a number of technical devices and apparatus in which in the process of operation the heat received and the heat sink change places. An example is the side surface of a satellite, which periodically serves for receiving the sun heat or its rejecting into the surrounding space. In this connection there arises the necessity to create a reversible device capable of transferring heat under periodic changes of the direction of a heat flow. Ordinary heat pipes possess such a quality, however, the dependence on the orientation at 1-g conditions and a comparatively low heat-transfer capacity restrict their possibilities. Loop Heat Pipes (LHPs) have considerably higher heat-transfer characteristics and are adaptable to different operating conditions, but they are thermal diodes. As a consequence a topical problem is the creation of a reversible loop heat pipe (RLHP) capable of transferring heat in both directions. An ammonia RLHP 2 m long has been created and tested. It demonstrated a maximum capacity of 900 W with heat transferred in both directions and a thermal resistance of 0.035 K/W at a nominal load of 400 W. Tests were conducted both in conditions of ordinary environment and in a vacuum chamber.


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    Titel :

    Development and investigation of an ammonia reversible loop heat pipe


    Weitere Titelangaben:

    Entwicklung und Untersuchung eines reversiblen ammoniakbetriebenen Ring-Wärmerohres


    Beteiligte:
    Sudakov, R.G. (Autor:in) / Maidanik, Y.F. (Autor:in) / Ochterbeck, J.M. (Autor:in) / Choi, S.W. (Autor:in)


    Erscheinungsdatum :

    2002


    Format / Umfang :

    5 Seiten, 6 Bilder, 2 Tabellen, 5 Quellen


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




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