Wick assembly for self-regulated fluid management in a pumped tw

Details Wick assembly for self-regulated fluid management in a pumped tw Wick assembly for self-regulated fluid management in a pumped tw

1988-11-07

1990-01-02

Davis, Jr., Albert W.

Heat exchange

Intermediate fluent heat exchange material receiving and...

Liquid fluent heat exchange material

165 41, 16510426, 165110, F28D 1502

Patent

active

048906689

ABSTRACT:
A two-phase closed-loop heat transfer system comprises a capillary-type evaporator 10, a condenser 11 (preferably also of the capillary type), and a vapor conduit 17 through which heat-laden working fluid in vapor phase is driven adiabatically from the evaporator 10 to the condenser 11. The evaporator 10 comprises a plurality of tubes 12 connected in parallel. A helically threaded capillary channel 39 is formed on the cylindrical interior surface of each tube 12, and a wick assembly 33 is positioned longitudinally within each tube 12. Each wick assembly 33 comprises a high-permeability wick 36 within which are embedded a first tubule 34 and a second tubule 35. The first and second tubules 34 and 35 are of low permeability, and have one closed end and one open end. The open end of the first tubule 34 is connected to a feed line 16 through which liquid-phase working fluid is delivered into the first tubule 34. Liquid-phase working fluid seeps through the first tubule 34 into the surrounding wick 36, and migrates through the wick 36 to the capillary channel 39 with which the wick 36 is in contact. Liquid-phase working fluid in excess of an amount needed to keep the capillary channel 39 wetted seeps from the wick 36 into the interior of the second tubule 35. The open end of the second tubule 35 is connected to a return line 18.

REFERENCES:
patent: 3892273 (1975-07-01), Nelson
patent: 4019571 (1977-04-01), Kosson et al.
patent: 4492266 (1985-01-01), Bizzell et al.

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