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Title: Superconducting cable cooling system by helium gas and a mixture of gas and liquid helium

Abstract

Thermally contacting, oppositely streaming cryogenic fluid streams in the same enclosure in a closed cycle that changes from a cool high pressure helium gas to a cooler reduced pressure helium fluid comprised of a mixture of gas and boiling liquid so as to be near the same temperature but at different 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 in a go leg from a refrigerator at one end of the line as a high pressure helium gas near the normal boiling temperature of helium; then circulating the gas through an expander at the other end of the line where the gas becomes a mixture of reduced pressure gas and boiling liquid at its boiling temperature; then by circulating the mixture in a return leg that is separated from but in thermal contact with the gas in the go leg and in the same enclosure therewith; and finally returning the resulting low pressure gas to the refrigerator for compression intomore » a high pressure gas at T.sub.2 is a closed cycle, where T.sub.1 >T.sub.2, the temperature distribution is such that the line temperature is nearly constant along its length from the refrigerator to the expander due to the boiling of the liquid in the mixture. A heat exchanger between the go and return lines removes the gas from the liquid in the return leg while cooling the go leg.« less

Inventors:
 [1]
  1. Los Alamos, NM
Issue Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
OSTI Identifier:
862820
Patent Number(s):
4020274
Assignee:
United States of America as represented by United States Energy (Washington, DC)
Patent Classifications (CPCs):
H - ELECTRICITY H02 - GENERATION H02G - INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10S - TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
DOE Contract Number:  
AT(30-1)-16
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
superconducting; cable; cooling; helium; gas; mixture; liquid; thermally; contacting; oppositely; streaming; cryogenic; fluid; streams; enclosure; closed; cycle; changes; cool; pressure; cooler; reduced; comprised; boiling; near; temperature; pressures; respectively; return; legs; thermal; contact; longitudinally; extending; transmission; line; enclosed; insulates; ambient; circulating; leg; refrigerator; normal; expander; separated; therewith; finally; returning; resulting; compression; distribution; nearly; constant; length; due; heat; exchanger; lines; removes; return line; superconducting cable; pressure helium; fluid streams; boiling temperature; return leg; reduced pressure; pressure gas; fluid stream; transmission line; heat exchange; heat exchanger; longitudinally extending; thermal contact; helium gas; cryogenic fluid; nearly constant; closed cycle; temperature distribution; liquid helium; superconducting transmission; oppositely streaming; gas near; cooler reduced; thermally contacting; thermally contact; cable cooling; /174/505/

Citation Formats

Dean, John W. Superconducting cable cooling system by helium gas and a mixture of gas and liquid helium. United States: N. p., 1977. Web.
Dean, John W. Superconducting cable cooling system by helium gas and a mixture of gas and liquid helium. United States.
Dean, John W. Sat . "Superconducting cable cooling system by helium gas and a mixture of gas and liquid helium". United States. https://www.osti.gov/servlets/purl/862820.
@article{osti_862820,
title = {Superconducting cable cooling system by helium gas and a mixture of gas and liquid helium},
author = {Dean, John W},
abstractNote = {Thermally contacting, oppositely streaming cryogenic fluid streams in the same enclosure in a closed cycle that changes from a cool high pressure helium gas to a cooler reduced pressure helium fluid comprised of a mixture of gas and boiling liquid so as to be near the same temperature but at different 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 in a go leg from a refrigerator at one end of the line as a high pressure helium gas near the normal boiling temperature of helium; then circulating the gas through an expander at the other end of the line where the gas becomes a mixture of reduced pressure gas and boiling liquid at its boiling temperature; then by circulating the mixture in a return leg that is separated from but in thermal contact with the gas in the go leg and in the same enclosure therewith; and finally returning the resulting low pressure gas to the refrigerator for compression into a high pressure gas at T.sub.2 is a closed cycle, where T.sub.1 >T.sub.2, the temperature distribution is such that the line temperature is nearly constant along its length from the refrigerator to the expander due to the boiling of the liquid in the mixture. A heat exchanger between the go and return lines removes the gas from the liquid in the return leg while cooling the go leg.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1977},
month = {1}
}

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