This paper describes a series of parametric investigations to determine the effect of various fluid charges on the performance of a 0.635-cm-diameter spiral-artery, liquid-trap diode in both the forward and reverse modes. Specific parameters such as forward- and reverse-mode conductances, shutdown times and energies, and recovery to forward-mode operation, are evaluated for ethane as a working fluid in the temperature range 170 K to 220 K. Results indicate that the heat pipe will not reliably start up in the forward mode. However, startup can be initiated when preceded by a diode reversal. Also included are data which show the susceptibility of the diode to fluid charge and tilt. The optimum fluid charge was found to be 2.67 g, and transport capability at this charge was in excess of 1200 W-cm at 200 K. The diode in the reverse mode exhibited a rapid shutdown (within 9 min) with a shutdown energy of 1150 J (0.32 Wh).


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    Title :

    Investigation of a cryogenic thermal diode


    Additional title:

    Untersuchungen ueber eine kaelteerzeugende thermische Diode


    Contributors:


    Publication date :

    1978


    Size :

    7 Seiten, 13 Bilder, 1 Tabelle, 7 Quellen


    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English






    Experimental Investigation of a Cryogenic Methane Heat Pipe Diode

    Groll, M. / Roesler, S. / Supper, W. | SAE | 1986



    Cryogenic Thermal Diodes

    Paulsen, B. R. / Batty, J. C. / Agren, J. et al. | British Library Conference Proceedings | 2000