Electricity: conductors and insulators – With fluids or vacuum – With cooling or fluid feeding – circulating or distributing
Patent
1974-09-30
1976-05-04
Grimley, Arthur T.
Electricity: conductors and insulators
With fluids or vacuum
With cooling or fluid feeding, circulating or distributing
165 45, 174 16B, H01B 734
Patent
active
039550427
ABSTRACT:
An apparatus for cooling underground power cables. Cooling of underground power cables is presently effected by the circulation of water or oil through pipes within which the cables are situated. The oil or water is then circulated through air or water-cooled heat exchangers which are uniformly spaced along the transmission line. However, a substantial flow of liquid is required to extract a useful quantity of heat, and extensive equipment is necessary to effect this flow of liquid. The subject invention proposes a relatively inexpensive and more efficient apparatus to cool underground cables. The apparatus comprises an enclosed chamber adapted to extend along a portion of a length of the underground cables and adapted to be partially filled with volatile liquid. An enclosed heat exchanger is connected to the enclosed chamber, the connection and the enclosed heat exchanger being located above a level of the volatile liquid within the enclosed chamber, whereby the volatile liquid is evaporated within the enclosed chamber by heat generated within the power cables. The evaporated liquid is transferred by virtue of a pressure differential from the enclosed chamber to the enclosed heat exchanger, wherein the evaporated volatile liquid is condensed and from which it flows by gravity back to the enclosed chamber.
REFERENCES:
patent: 1754314 (1930-04-01), Gay
patent: 3363046 (1968-01-01), Endacott
patent: 3609206 (1971-09-01), McConnell
Bonneville Jacques
Kellow Mazin
Vansant James
Grimley Arthur T.
Hydro-Quebec Institute of Research
Mack Peter G.
Robic Raymond A.
Schwartz Arthur
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