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).
Investigation of a cryogenic thermal diode
Untersuchungen ueber eine kaelteerzeugende thermische Diode
3RD INTERNAT. HEAT PIPE CONF., AIAA ; 177-183
1978
7 Seiten, 13 Bilder, 1 Tabelle, 7 Quellen
Conference paper
English
Investigation of a cryogenic thermal diode
AIAA | 1978
|A Thermal Diode Heat Pipe for Cryogenic Applications
AIAA | 1978
|British Library Conference Proceedings | 2000
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