Permafrost stabilizing heat pipe assembly

Details Permafrost stabilizing heat pipe assembly Permafrost stabilizing heat pipe assembly

1974-04-22

1977-07-19

Davis, Jr., Albert W.

Heat exchange

Geographical

291573A, 165 76, 165105, 165181, F28D 1500

Patent

active

040362868

ABSTRACT:
A separable heat pipe assembly for stabilizing the generally frozen soil adjacent and supporting a structural member or foundation in permafrost or similar regions, including a cooperative combination of a sheath installed in the frozen soil and a closely mating heat pipe element normally inserted into the sheath with a substance of good thermal conductivity filling the small void remaining therebetween. The underground sheath preferably has a plurality of heat gathering fins and the mated heat pipe element preferably has an integral radiator section protruding aboveground. The thermal substance is preferably a liquid mixture of water and ethylene glycol, for example, mixed in a selected ratio.
Another heat pipe installation includes a tubular structure installed in a permafrost environment, a heat pipe element having its lower portion installed in the structure and positioned at least in proximity longitudinally to the wall of the structure, and soil or other substances filling the space remaining between the lower element portion and the structure wall. The upper portion of the heat pipe element has a thicker wall than its lower portion and can be provided with threads thereon. A sleeve-type radiator can be provided with complementary threads therein so that the radiator can be threadedly engaged to the upper element portion. The depth and pitch of the threads can be changed to vary the heat transfer surface area obtainable between the engaged radiator and upper element portion. Alternatively, the radiator and upper element portion are not threaded but can be sized to provide for an interference press fit to secure them together. A lubricant-preservative-thermal substance can be used to fill any interface space between the mating surfaces of the threadedly engaged or press-fitted radiator and upper element portion.

REFERENCES:
patent: 3183675 (1965-05-01), Schroeder
patent: 3217791 (1965-11-01), Long
patent: 3274769 (1966-09-01), Reynolds
patent: 3280907 (1966-10-01), Hoffman
patent: 3470943 (1969-10-01), Van Huisen
patent: 3643312 (1972-02-01), Shriver
patent: 3739234 (1973-06-01), Bylund et al.
patent: 3788389 (1974-01-01), Waters
patent: 3823769 (1974-07-01), Anderson et al.
patent: 3828845 (1974-08-01), Waters

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