This paper describes the gravity effect on heat transport characteristics in a miniature loop heat pipe with multiple evaporators and multiple condensers. Tests were conducted in three different orientations: horizontal, 45deg tilt, and vertical. The gravity affected the loop’s natural operating temperature, the maximum heat transport capability, and the thermal conductance. In the case that temperatures of compensation chambers were actively controlled, the required control heater power was also dependent on the test configuration. In the vertical configuration, the secondary wick was not able to pump the liquid from the CC to the evaporator against the gravity. Thus, the loop could operate stably or display some peculiar behaviors depending on the initial liquid distribution between the evaporator and the CC. Because such an initial condition was not known prior to the test, the subsequent loop performance was unpredictable.


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    Titel :

    Gravity Effect on Capillary Limit in a Miniature Loop Heat Pipe with Multiple Evaporators and Multiple Condensers


    Beteiligte:
    Nagano, Hosei (Autor:in) / Ku, Jentung (Autor:in) / El-Genk, Mohamed S. (Herausgeber:in)

    Kongress:

    SPACE TECHNOLOGY AND APPLICATIONS INTERNATIONAL FORUM-STAIF 2007: 11th Conf Thermophys.Applic.in Micrograv.; 24th Symp Space Nucl.Pwr.Propulsion; 5th Conf Hum/Robotic Techn & Vision Space Explor.; 5th Symp Space Coloniz.; 4th Symp New Frontrs & Future Con ; 2007 ; Albuquerque, New Mexico (USA)


    Erschienen in:

    Erscheinungsdatum :

    30.01.2007


    Format / Umfang :

    8 pages





    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



    Capillary Limit of a Miniature Loop Heat Pipe with Multiple Evaporators and Multiple Condensers

    Nagano, H. / Ku, J. / American Institute of Aeronautics and Astronautics | British Library Conference Proceedings | 2006




    Start-Up Behavior of a Miniature Loop Heat Pipe with Multiple Evaporators and Multiple Condensers AIAA Paper

    Nagano, H. / Ku, J. / American Institute of Aeronautics and Astronautics | British Library Conference Proceedings | 2007