GB1222843A - A method of maintaining electric apparatus at low temperature - Google Patents

A method of maintaining electric apparatus at low temperature

Info

Publication number
GB1222843A
GB1222843A GB25059/68A GB2505968A GB1222843A GB 1222843 A GB1222843 A GB 1222843A GB 25059/68 A GB25059/68 A GB 25059/68A GB 2505968 A GB2505968 A GB 2505968A GB 1222843 A GB1222843 A GB 1222843A
Authority
GB
United Kingdom
Prior art keywords
hydrogen
liquid
expanded
exchanger
helium
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
Application number
GB25059/68A
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.)
Air Liquide SA
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
Original Assignee
Air Liquide SA
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
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 Air Liquide SA, LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude filed Critical Air Liquide SA
Publication of GB1222843A publication Critical patent/GB1222843A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K55/00—Dynamo-electric machines having windings operating at cryogenic temperatures
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
    • H02K9/20—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil wherein the cooling medium vaporises within the machine casing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/08—Cooling; Ventilating
    • H01F27/20—Cooling by special gases or non-ambient air
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Separation By Low-Temperature Treatments (AREA)

Abstract

1,222,843. Refrigerating. L'AIR LIQUIDE SOC. ANON. POUR L'ETUDE ET L'EXPLOITATION DES PROCEDES GEORGES CLAUDE. 24 May, 1968 [24 May, 1967], No. 25059/68. Heading F4H. In a refrigeration system for cooling electrical apparatus the refrigerant is a mixture of hydrogen and helium and is liquefied by expansion to substantially atmospheric pressure, the liquid produced comprising hydrogen and helium in such proportions that the boiling point of the liquid is from 15‹ to 17‹ K. As shown, a system using a mixture of 60% by volume of helium and 40% by volume of hydrogen, comprises a compressor 5 which discharges via heat exchangers 1, 2, 3 to an expansion valve 15, part of the gas leaving exchanger 1 being expanded in turbine 10 and used to cool exchanger 2 before being added to the return gas line 13. The liquid fraction, containing substantially more hydrogen than the expanded gaseous mixture, is collected in separator 4 and part is added through line 25 to the return gas line 26 to restore the original hydrogen content of the gas to be compressed. The remaining liquid is circulated by pumps 17, 18 in parallel to cool the electrical conductors 19, 20 of a voltage transformer and a turbo-alternator respectively. Pump 17 pressurizes the liquid sufficiently to prevent boiling thereof and the liquid leaving conductors 19 is expanded to its initial pressure in valve 21 before being combined with the vapour produced by heat exchange with conductors 20. The combined stream is reliquefied in heat exchanger 3 and returned to separator 4. Operating temperatures and pressures are specified. In a further embodiment (Fig. 2, not shown) the system employs a mixture of 50% hydrogen and 50% helium by volume and includes two further counterflow heat exchangers. Part of the gas from the downstream side of the highest temperature exchanger is expanded in a turbine, used to cool the third heat exchanger, then expanded in a further turbine and used to cool the fourth exchanger before joining the return gas stream. Operating pressures and temperatures are again specified.
GB25059/68A 1967-05-24 1968-05-24 A method of maintaining electric apparatus at low temperature Expired GB1222843A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR107672A FR1540391A (en) 1967-05-24 1967-05-24 Method of maintaining electrical devices at very low temperatures

Publications (1)

Publication Number Publication Date
GB1222843A true GB1222843A (en) 1971-02-17

Family

ID=8631504

Family Applications (1)

Application Number Title Priority Date Filing Date
GB25059/68A Expired GB1222843A (en) 1967-05-24 1968-05-24 A method of maintaining electric apparatus at low temperature

Country Status (3)

Country Link
DE (1) DE1763370A1 (en)
FR (1) FR1540391A (en)
GB (1) GB1222843A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2736423B1 (en) * 1995-06-08 1997-08-14 Air Liquide METHOD AND DEVICE FOR REFRIGERATION OF THERMAL SCREEN (S)
FR2775518B1 (en) * 1998-03-02 2000-05-05 Air Liquide PROCESS AND INSTALLATION FOR REFRIGERATING PRODUCTION FROM A THERMAL CYCLE OF A FLUID WITH LOW BOILING POINT
FR2919713B1 (en) * 2007-08-03 2013-12-06 Air Liquide METHOD OF REFRIGERATING A FLUID, SUCH AS A HELIUM, FOR FEEDING A FLUID CONSUMER, AND A CORRESPONDING INSTALLATION
DE102019206904B4 (en) * 2019-05-13 2022-06-02 Technische Universität Dresden Process for cooling a fluid mixture

Also Published As

Publication number Publication date
DE1763370A1 (en) 1971-12-30
FR1540391A (en) 1968-09-27

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