Electricity: conductors and insulators – With fluids or vacuum – With cooling or fluid feeding – circulating or distributing
Patent
1988-11-08
1990-08-07
Nimmo, Morris H.
Electricity: conductors and insulators
With fluids or vacuum
With cooling or fluid feeding, circulating or distributing
174 154, 307147, 505885, 505886, H01B 1200
Patent
active
049470078
ABSTRACT:
A superconducting transmission line system for transferring electrical power over long distances. The system includes a superconducting transmission line extending from a first location where power is supplied to the line to a second location where electrical power is taken from the line. The line includes an inner tube, and a superconducting core positioned inside the tube and spaced from the inner surface of the tube. The core and the inner tube define a passageway for a cryogenic liquid, the boiling temperature of which is above the superconducting transition temperature of the core. The transmission line system also includes a number of spaced supports holding the transmission line with the portion of the transmission line extending between a pair of adjacent supports being lower than the parts of the line held by the pair of adjacent supports. A regenerator for the cryogenic liquid is mounted on each of the pair of supports. Each regenerator is connected to the transmission line and each operates to reliquefy gases resulting from boiling of the cryogenic liquid in the portion of the transmission line so that gasses resulting from the boiling of the cryogenic liquid due to conductive or radiative heat transfer percolate to the regenerators where they are reliquified and returned to the transmission line thereby maintaining the superconductive core below its transition temperature. A method of maintaining the superconductive core in a transmission line extending over a long distance, below its transition temperature, is also disclosed.
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Creedon Richard L.
Dew Michael W.
General Atomics
Nimmo Morris H.
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