US3736365A - Cryogenic cable - Google Patents

Cryogenic cable Download PDF

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Publication number
US3736365A
US3736365A US00244166A US3736365DA US3736365A US 3736365 A US3736365 A US 3736365A US 00244166 A US00244166 A US 00244166A US 3736365D A US3736365D A US 3736365DA US 3736365 A US3736365 A US 3736365A
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US
United States
Prior art keywords
covering
cryogenic
coverings
internal
cryogenic cable
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US00244166A
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English (en)
Inventor
J Bobo
A Dubois
M Aupoix
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alcatel Lucent SAS
Original Assignee
Compagnie Generale dElectricite SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Compagnie Generale dElectricite SA filed Critical Compagnie Generale dElectricite SA
Application granted granted Critical
Publication of US3736365A publication Critical patent/US3736365A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B12/00—Superconductive or hyperconductive conductors, cables, or transmission lines
    • H01B12/14—Superconductive or hyperconductive conductors, cables, or transmission lines characterised by the disposition of thermal insulation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/60—Superconducting electric elements or equipment; Power systems integrating superconducting elements or equipment
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S505/00—Superconductor technology: apparatus, material, process
    • Y10S505/825—Apparatus per se, device per se, or process of making or operating same
    • Y10S505/884—Conductor
    • Y10S505/885—Cooling, or feeding, circulating, or distributing fluid; in superconductive apparatus
    • Y10S505/886—Cable

Definitions

  • the invention relates to the field of electric cryogenic cables.
  • an electric cryogenic cable of the known type comprises:
  • An internal metal covering or sleeve which is fluidtight, is suitable for conveying a cryogenic fluid and contains at least one electric conductor;
  • An external metal covering or sleeve which is fluidtight, and which is intended to be brought to an electric potential distinct from that of the internal covering
  • Electrical insulating means inserted between the internal covering and the external covering.
  • the electrical insulation is essentially provided by insulating tape arranged between the internal covering and the external covering.
  • the object of the present invention is to provide an electric cryogenic cable having electrical insulating means more effective than the insulating means referred to above.
  • a more specific object of the present invention is to provide an electric cryogenic cable comprising:
  • An external covering or sleeve which is fluid-tight which is outside the internal covering and which is intended to be brought to an electric potential distinct from that of the internal covering;
  • FIGS. 1, 2 and 3 are diagrarnmatical sectional views of three embodiments of the invention. Analogous elements are given identical reference numerals in the three figures.
  • the cryogenic cable shown in 'FIG. 1 comprises a metal internal covering or sleeve 1 which is fluid-tight and consists of an electric conductor 3, made of aluminum, for example, suitable for containing a flow of cryogenic fluid 2, such as helium.
  • the conductor 3 contains, within its ground conductor, several conductors 4, parallel to its generating lines, which may each consist of strands of superconductive material connected with stainless steel strands.
  • the conductor 3 may be enveloped in an insulating tape, made of ethylene-glycol polyterephthalate, for example, which is better known by its registered trade name, MYLAR.
  • the cryogenic cable comprises also an external covering 7, which is fluid-tight and is made of metal, such as steel, and which is arranged around the internal covering 1.
  • a metallic thermal screen 8 which is not fluidtight when under vacuum, is preferably inserted between the two coverings 1 and 7; this screen is cooled by means of a cryogenic fluid 9, such as liquid nitrogen, flowing through the ducts formed in its walls.
  • a super thermal insulator made of a powder containing mainly alumina, for example, occupies at least a part of the volume 10 formed between the thermal screen 8 and the external covering 7.
  • the space formed between the internal covering 1 and the external covering 7 is filled with gas, for example, helium, at a pressure between 10 and 10 Torr. It has been observed, indeed, that this gas under slight pressure made it possible to improve substantially the electric insulation of the cryogenic cable.
  • gas for example, helium
  • the gas pressure is between 10 and 10 Torr, so as to remain compatible with the presence of the alumina powder.
  • cryogenic cable shown in FIG. 2 is intended for carrying single phase alternating current.
  • the covering 20 is intended to be brought to a high electric potential and the covering 30 to the potential of the ground conductor.
  • the cryogenic cable formed by the two coverings 20 and 30 is surrounded by a thermal screen 8, cooled by means of a cryogenic fluid 9, and by an external covering 7 which is fluid tight.
  • a thermal super-insulator preferably occupies the space 10 between the screen 8 and the covering 7.
  • a cryogenic cable comprising: a. at least one internal covering including at least one electric conductor; I b. a fluid-tight external covering, outside said internal covering and adapted to be brought to an electric potential distinct from that of said internal covermg; 0. means for cooling at least one of said coverings; d. means for thermally insulating said coverings from out-side conditions; and
  • said coverings e. means for electrically insulating said coverings from one another, said electric insulating means comprising a volume of gas at a pressure between 10 and 10 Torr and disposed between said coverings.
  • a cryogenic cable according to claim 1 wherein said internal covering comprises a resistant cryogenic support whose external surface is provided with a first superconductive layer, and wherein said external covering is coaxial with said internal covering and comprises a resistant cryogenic support whose internal surface is provided with a second superconductive layer, said first and second superconductive layers being electrically insulated form each other by said volume of gas.
  • a cryogenic cable according to claim 2 wherein said internal and external coverings form a set of coverings, and further comprising additional sets of coverings and an additional fluid-tight covering enclosing all of said sets of coverings and suitable for conveying a cryogenic fluid.

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  • Superconductors And Manufacturing Methods Therefor (AREA)
US00244166A 1971-04-14 1972-04-14 Cryogenic cable Expired - Lifetime US3736365A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7113090A FR2133233A5 (enrdf_load_stackoverflow) 1971-04-14 1971-04-14

Publications (1)

Publication Number Publication Date
US3736365A true US3736365A (en) 1973-05-29

Family

ID=9075229

Family Applications (1)

Application Number Title Priority Date Filing Date
US00244166A Expired - Lifetime US3736365A (en) 1971-04-14 1972-04-14 Cryogenic cable

Country Status (8)

Country Link
US (1) US3736365A (enrdf_load_stackoverflow)
BE (1) BE781869A (enrdf_load_stackoverflow)
CA (1) CA943198A (enrdf_load_stackoverflow)
DE (1) DE2217360A1 (enrdf_load_stackoverflow)
FR (1) FR2133233A5 (enrdf_load_stackoverflow)
GB (1) GB1379495A (enrdf_load_stackoverflow)
IT (1) IT951353B (enrdf_load_stackoverflow)
NL (1) NL7204927A (enrdf_load_stackoverflow)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4066991A (en) * 1975-11-20 1978-01-03 Sala Magnetics, Inc. Pressure support for limiting strain in a superconducting winding
US4992623A (en) * 1989-04-26 1991-02-12 At&T Bell Laboratories Superconducting bus bar
US5132283A (en) * 1987-12-28 1992-07-21 Ford Motor Company Thin film superconductor assembly and method of making the same
US6512311B1 (en) * 1995-12-28 2003-01-28 Pirelli Cavi S.P.A. High power superconducting cable
US6576843B1 (en) 2000-07-17 2003-06-10 Brookhaven Science Associates, Llc Power superconducting power transmission cable
US7009104B2 (en) * 2000-12-27 2006-03-07 Pirelli Cavi E Sistemi S.P.A. Superconducting cable
US20060284711A1 (en) * 2005-05-26 2006-12-21 Siemens Magnet Technology Ltd. Electromagnet
WO2018070873A1 (en) * 2016-10-12 2018-04-19 Iwo Project B.V. Superconducting cable arrangement

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3501581A (en) * 1967-05-23 1970-03-17 British Insulated Callenders Electric conductors and electric power cables incorporating them
US3512581A (en) * 1967-07-03 1970-05-19 British Insulated Callenders Cryogenic devices
US3515793A (en) * 1966-12-29 1970-06-02 Comp Generale Electricite Cryogenic polyphase cable
US3562401A (en) * 1969-03-03 1971-02-09 Union Carbide Corp Low temperature electric transmission systems
US3591705A (en) * 1967-11-21 1971-07-06 British Insulated Callenders Superconductive devices and conductors therefor
US3595982A (en) * 1967-12-20 1971-07-27 Siemens Ag Supercounducting alternating current cable
US3612742A (en) * 1969-02-19 1971-10-12 Gulf Oil Corp Alternating current superconductive transmission system

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3515793A (en) * 1966-12-29 1970-06-02 Comp Generale Electricite Cryogenic polyphase cable
US3501581A (en) * 1967-05-23 1970-03-17 British Insulated Callenders Electric conductors and electric power cables incorporating them
US3512581A (en) * 1967-07-03 1970-05-19 British Insulated Callenders Cryogenic devices
US3591705A (en) * 1967-11-21 1971-07-06 British Insulated Callenders Superconductive devices and conductors therefor
US3595982A (en) * 1967-12-20 1971-07-27 Siemens Ag Supercounducting alternating current cable
US3612742A (en) * 1969-02-19 1971-10-12 Gulf Oil Corp Alternating current superconductive transmission system
US3562401A (en) * 1969-03-03 1971-02-09 Union Carbide Corp Low temperature electric transmission systems

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4066991A (en) * 1975-11-20 1978-01-03 Sala Magnetics, Inc. Pressure support for limiting strain in a superconducting winding
US5132283A (en) * 1987-12-28 1992-07-21 Ford Motor Company Thin film superconductor assembly and method of making the same
US5376625A (en) * 1987-12-28 1994-12-27 Ford Motor Company Method of making thin film superconductor assembly
US4992623A (en) * 1989-04-26 1991-02-12 At&T Bell Laboratories Superconducting bus bar
US6512311B1 (en) * 1995-12-28 2003-01-28 Pirelli Cavi S.P.A. High power superconducting cable
US6576843B1 (en) 2000-07-17 2003-06-10 Brookhaven Science Associates, Llc Power superconducting power transmission cable
US7009104B2 (en) * 2000-12-27 2006-03-07 Pirelli Cavi E Sistemi S.P.A. Superconducting cable
US20060284711A1 (en) * 2005-05-26 2006-12-21 Siemens Magnet Technology Ltd. Electromagnet
US20090039991A1 (en) * 2005-05-26 2009-02-12 Siemens Magnet Technology Ltd. Electromagnet
US7859375B2 (en) * 2005-05-26 2010-12-28 Siemens Plc Electromagnet
WO2018070873A1 (en) * 2016-10-12 2018-04-19 Iwo Project B.V. Superconducting cable arrangement

Also Published As

Publication number Publication date
NL7204927A (enrdf_load_stackoverflow) 1972-10-17
GB1379495A (en) 1975-01-02
IT951353B (it) 1973-06-30
FR2133233A5 (enrdf_load_stackoverflow) 1972-11-24
BE781869A (fr) 1972-10-10
CA943198A (en) 1974-03-05
DE2217360A1 (de) 1972-10-19

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