A long titanium‐water thermosyphon heat pipe was designed and tested in support of NASA’s lunar surface power system. With a ΔT of 11.6 C, a prototype has been shown to meet the temperature drop specification of 15 C at 400 W and 400 K. The heat pipe is designed to be embedded in a composite radiator panel to spread waste heat delivered by a circulating pumped loop. The major challenge was managing the fluid inventory to balance the conflicting requirements of power capacity and freeze‐thaw tolerance. A unique hybrid wick was designed to achieve the required thermal performance and yet store all the working fluid during idle periods in a freeze‐thaw tolerant fashion. A non‐condensable gas charge was used to boost power capacity at lower operating temperatures. Eighteen prototypes will be built and tested.


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    Title :

    A Thermosyphon Titanium‐Water Heat Pipe Design for a Lunar Surface Power System


    Contributors:

    Conference:

    SPACE, PROPULSION & ENERGY SCIENCES INTERNATIONAL FORUM: SPESIF‐2009 ; 2009 ; Huntsville (Alabama)


    Published in:

    AIP Conference Proceedings ; 1103 , 1 ; 51-56


    Publication date :

    2009-03-16


    Size :

    6 pages





    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



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