Heat exchange – Intermediate fluent heat exchange material receiving and... – Liquid fluent heat exchange material
Patent
1981-10-22
1984-09-11
Davis, Jr., Albert W.
Heat exchange
Intermediate fluent heat exchange material receiving and...
Liquid fluent heat exchange material
16510426, 16510433, 165DIG14, F28D 1500
Patent
active
044704500
ABSTRACT:
A closed-loop heat transfer system comprises a heat pipe (10) and an external liquid-phase pump (11). The heat pipe (10) includes an evaporator (12) and a condenser (13) connected by a conduit (14). The evaporator (12) is a hollow structure having an interior surface defining an evaporation region in which a working field in liquid phase absorbs heat from a heat source by evaporation. A capillary pumping structure, e.g., capillary channels (30) or a fine-mesh screen (41), is provided on or adjacent the interior wall of the evaporator (12). Evaporated working fluid laden with heat is thermodynamically driven substantially adiabatically via the conduit (14) from the evaporator (12) to the condenser (13), wherein the working fluid rejects heat to a heat sink by condensation. Condensed working fluid is thereupon returned from the condenser (13) to the evaporator (12) via external conduits (22, 15) by means of the liquid-phase pump (11). The capillary pumping structure inside the evaporator (12) serves to maintain a constant supply of working fluid in liquid phase adjacent the interior surface of the evaporator (12), thereby promoting efficient transfer of heat from the heat source to the working fluid in the evaporator (12). There is no limitation on the length of the heat pipe (10) caused by capillary pumping requirements of the system. Pursuant to 37 CFR 1.72(b), the foregoing abstract shall not be used for interpreting the scope of the claims herein.
REFERENCES:
patent: 2110774 (1938-03-01), Privett
patent: 3388740 (1968-06-01), O'Loughlin
patent: 3561229 (1971-02-01), Levin
patent: 4040478 (1977-08-01), Pogson et al.
patent: 4252185 (1981-02-01), Kosson
Hanneman, R. J., Externally Pumped Rankine Cycle Thermal Transport Devices, AIAA 14th Thermophysics Conf., 6/6/79.
Bizzell Gary D.
Ekern William F.
Davis Jr. Albert W.
Lockheed Missiles & Space Co.
Morrissey John J.
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