The thermal performance of a flat-plate oscillating heat pipe operating as a heat spreader was experimentally investigated. The copper flat-plate oscillating heat pipe had overall dimensions of 101.6 × 101.6 × 3.18 mm 3 , possessed two layers of 1.02 × 1.02 mm 2 minichannels, and was charged with acetone to a filling ratio of approximately 80%. The flat-plate oscillating heat pipe was centrally heated with a 9 cm 2 square heat source and had a copper pin-fin heat sink attached to its opposite side for crossflowing air at speeds of either 1, 2, or 3 m / s . The results clearly indicated that the flat-plate oscillating heat pipe is capable of operating in the thermal spreading mode, providing for a 10–15% reduction in total thermal resistance (relative to pure copper) and managing heat inputs up to 230 W ( 25 W / cm 2 ) with the maximum surface temperature not exceeding 100°C. In addition, the temperature uniformity of the heat sink was greater when attached to the flat-plate oscillating heat pipe, especially for lower Reynolds numbers (airspeeds). A critical heat input was required to initiate the flat-plate oscillating heat pipe, and this heat input increased with Reynolds number. This study further confirms the heating mode directly affects the heat transfer performance of a flat-plate oscillating heat pipe.


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    Titel :

    Thermal Spreading with Flat-Plate Oscillating Heat Pipes


    Beteiligte:
    Thompson, Scott M. (Autor:in) / Lu, Hanwen (Autor:in) / Ma, Hongbin (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    01.04.2015




    Medientyp :

    Aufsatz (Konferenz) , Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch





    Experimental Investigation of Flat-Plate Oscillating Heat Pipe for Thermal Spreading Applications

    Thompson, S. / Ma, H. / Lu, H. et al. | British Library Conference Proceedings | 2013


    Oscillating Heat Pipes

    Miyazaki, Y. / Polasek, F. / Akachi, H. et al. | British Library Conference Proceedings | 2000


    Oscillating Heat Pipes

    Polasek, F. / Akachi, H. / Miyazaki, Y. | SAE Technical Papers | 2000


    Flat-plate /vapor-chamber/ heat pipes

    FLEISCHMAN, G. / MARCUS, B. / MCINTOSH, R. et al. | AIAA | 1975