Heat pipes containing alkali metal working fluid

Details Heat pipes containing alkali metal working fluid Heat pipes containing alkali metal working fluid

1981-03-16

1983-02-08

Davis, Jr., Albert W.

Heat exchange

Intermediate fluent heat exchange material receiving and...

Liquid fluent heat exchange material

165134R, 291573H, F28D 1500

Patent

active

043723772

ABSTRACT:
This invention is concerned with improving high temperature evaporation-condensation heat-transfer devices which have important and unique advantage in terrestrial and space energy 5 processing. The device is in the form of a heat pipe 10 comprising a sealed container or envelope 12 which contains a capillary wick 14.
The temperature of one end of the heat pipe is raised by the input of heat from an external heat source 16 which is extremely hot and corrosive. A working fluid 18 of a corrosive alkali metal, such as lithium, sodium, or potassium transfers this heat to a heat receiver 20 remote from the heat source.
In accordance with the invention the container 12 and wick 14 are fabricated from a superalloy containing a small percentage of a corrosion inhibiting or gettering element. Lanthanum, scandium, yttrium, thorium, and hafnium are utilized as the alloying metal.

REFERENCES:
patent: 3426220 (1969-02-01), Block et al.
patent: 3602297 (1971-08-01), Kraft et al.
patent: 3640517 (1972-02-01), Sendt
patent: 3802875 (1974-04-01), Klein et al.
patent: 3907552 (1975-09-01), Kennedy
patent: 3928026 (1975-12-01), Hecht et al.
G. J. Ewell et al., Reliability of Low-Cost Liquid Metal Heat Pipes Third International Heat Pipe Conf., AIAA, May 22-24, 1978, Palo Alto, CA, USA, pp. 1-6.

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