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.


    Access

    Access via TIB

    Check availability in my library


    Export, share and cite



    Title :

    Development and investigation of an ammonia reversible loop heat pipe


    Additional title:

    Entwicklung und Untersuchung eines reversiblen ammoniakbetriebenen Ring-Wärmerohres


    Contributors:


    Publication date :

    2002


    Size :

    5 Seiten, 6 Bilder, 2 Tabellen, 5 Quellen


    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Experimental Study of a Reversible Loop Heat Pipe

    Bonghun Kim / G. P. Peterson | AIAA | 2005


    Design and Test Results of Reversible Loop Heat Pipe

    Wolf, Dave / Kroliczek, Edward / Yun, Seokgeun “James” | SAE Technical Papers | 1999


    Start-Up Behavior of an Ammonia Loop Heat Pipe

    Hoang, Triem / Baldauff, Robert / Cheung, Kwok | AIAA | 2005


    Reversible loop heat pipe layout for satellite radiating surface coupling

    XIE LONG / ZHAO JIELIAN / NIU LEI | European Patent Office | 2022

    Free access

    Performance characteristics of a stainless steel/ammonia loop heat pipe

    Wirsch, Paul J. / Thomas, Scott K. | AIAA | 1996