Superconducting cable cooling system by helium gas at two pressures
Thermally contacting, oppositely streaming, cryogenic fluid streams in the same enclosure in a closed cycle that changes the fluid from a cool high pressure helium gas to a cooler reduced pressure helium gas in an expander so as to be at different temperature ranges and pressures respectively in go and return legs that are in thermal contact with each other and in thermal contact with a longitudinally extending superconducting transmission line enclosed in the same cable enclosure that insulates the line from the ambient at a temperature T.sub.1. By first circulating the fluid from a refrigerator at one end of the line as a cool gas at a temperature range T.sub.2 to T.sub.3 in the go leg, then circulating the gas through an expander at the other end of the line where the gas becomes a cooler gas at a reduced pressure and at a reduced temperature T.sub.4 and finally by circulating the cooler gas back again to the refrigerator in a return leg at a temperature range T.sub.4 to T.sub.5, while in thermal contact with the gas in the go leg, and in the same enclosure therewith for compression into a higher pressure gas at T.sub.2 in a closed cycle, where T.sub.2 >T.sub.3 and T.sub.5 >T.sub.4, the fluid leaves the enclosure in the go leg as a gas at its coldest point in the go leg, and the temperature distribution is such that the line temperature decreases along its length from the refrigerator due to the cooling from the gas in the return leg.
- Research Organization:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Organization:
- US Atomic Energy Commission (AEC); US Energy Research and Development Administration (ERDA)
- DOE Contract Number:
- AT(30-1)-16
- Assignee:
- United States of America as represented by United States Energy (Washington, DC)
- Patent Number(s):
- 4,020,275
- Application Number:
- 05/649888
- OSTI ID:
- 862821
- Resource Relation:
- Patent File Date: 1976 Jan 27
- Country of Publication:
- United States
- Language:
- English
Design Features of ac Superconducting Cables
|
journal | January 1971 |
The technical and economic feasibility of superconducting power transmission: A case study
|
journal | January 1975 |
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Superconducting cable cooling system by helium gas and a mixture of gas and liquid helium
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