EP1842013B1 - Installation zum kryogenen kühlen für supraleitervorrichtung - Google Patents

Installation zum kryogenen kühlen für supraleitervorrichtung Download PDF

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Publication number
EP1842013B1
EP1842013B1 EP06709162A EP06709162A EP1842013B1 EP 1842013 B1 EP1842013 B1 EP 1842013B1 EP 06709162 A EP06709162 A EP 06709162A EP 06709162 A EP06709162 A EP 06709162A EP 1842013 B1 EP1842013 B1 EP 1842013B1
Authority
EP
European Patent Office
Prior art keywords
cryogenic fluid
tank
installation
liquid
auxiliary
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
EP06709162A
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English (en)
French (fr)
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EP1842013A1 (de
Inventor
Philippe Lebrun
Bruno Vullierme
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.)
ORGANISATION EUROPEENNE POUR LA RECHERCHE NUCLEAIRE (CERN)
Original Assignee
ORGANISATION EUROPEENNE POUR LA RECHERCHE NUCLEAIRE (CERN)
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Publication of EP1842013A1 publication Critical patent/EP1842013A1/de
Application granted granted Critical
Publication of EP1842013B1 publication Critical patent/EP1842013B1/de
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Classifications

    • 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
    • F25B19/00—Machines, plants or systems, using evaporation of a refrigerant but without recovery of the vapour
    • F25B19/005—Machines, plants or systems, using evaporation of a refrigerant but without recovery of the vapour the refrigerant being a liquefied gas
    • 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
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D3/00—Devices using other cold materials; Devices using cold-storage bodies
    • F25D3/10—Devices using other cold materials; Devices using cold-storage bodies using liquefied gases, e.g. liquid air
    • 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
    • F25B2500/00—Problems to be solved
    • F25B2500/01—Geometry problems, e.g. for reducing size
    • 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
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/04—Refrigerant level
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F6/00—Superconducting magnets; Superconducting coils
    • H01F6/04—Cooling

Definitions

  • the present invention relates generally to the field of cryogenic cooling installations of superconducting devices and more particularly to an installation according to the preamble of claim 1.
  • Such an installation is for example known from the document US-A-4,689,439 .
  • FIG. figure 1 of the attached drawing A conventional arrangement of an installation contemplated by the invention is illustrated in FIG. figure 1 of the attached drawing.
  • a reservoir 1 contains a two-phase cryogenic fluid whose liquid phase 2 is surmounted by a vapor phase 3.
  • a superconducting device 4 is immersed in the liquid phase 2.
  • a cryogenic fluid supply conduit 5 is connected to the reservoir 1 and a control valve 6, incorporated in the supply duct 5, makes it possible to control the supply of cryogenic fluid into the tank 1.
  • An outlet manifold 7 is provided for the evacuation of the cryogenic fluid vaporized by the thermal loads of the system.
  • a level gauge 8 for example functionally associated with the control valve 6, to detect the level of filling of the tank 1 with cryogenic fluid in the liquid phase and controlling the control valve 6.
  • the thermal loads of the system are absorbed by partial vaporization of the cryogenic liquid, by acting on the latent heat of vaporization thereof.
  • the vaporized cryogenic fluid is discharged through the outlet manifold 7, while cryogenic fluid in the liquid state is supplied as required under the control of the level gauge 8 and the control valve 6 so that the device superconductor 2 remains permanently immersed.
  • cryogenic fluid in the liquid state in contact with which must be maintained the device disappears quickly and completely to both because of its vaporization due to the increase of the thermal load and due to its turbulent flow at high output in the outlet manifold.
  • the return to a cooling of the device and the recovery of a state of superconductivity requires that cryogenic fluid in the liquid state is fed again into the reservoir.
  • This new supply of liquid cryogenic fluid not only requires time, but above all requires a supply of fluid that is expensive.
  • the main purpose of the invention is to propose an improved arrangement for an installation of the type in question which makes it possible to ensure its correct and reliable operation in the presence of normal thermal conditions, but which, in the presence of abnormal thermal conditions, allows a re-immersion faster device and faster recovery of the state of superconductivity and also avoids the loss of liquid cryogenic fluid initially present in the tank and therefore allows a substantial saving in cryogenic fluid.
  • auxiliary reservoir In order for the auxiliary reservoir to be made in a relatively compact form, it is advantageous for it to be arranged substantially higher than the main reservoir, so that only a small amount of liquid cryogenic fluid is contained therein under conditions normal thermal.
  • means for detecting the level of the liquid cryogenic fluid are arranged in the auxiliary tank.
  • the restriction means comprise a restriction, or, in a more elaborate embodiment, that they comprise an externally controlled valve.
  • FIG. figure 1 the installation arranged in accordance with the invention incorporates the elements shown in FIG. figure 1 with further a second tank or auxiliary tank 9.
  • a hydrostatic connection duct 10 is interposed between the respective bottoms of the main and auxiliary tanks 9.
  • the cryogenic fluid supply duct 5, with its control valve 6, is connected to the auxiliary reservoir 9 and the level gauge 8 is installed in the auxiliary tank 9.
  • the auxiliary tank 9 is also equipped with an outlet manifold 7b, while the outlet manifold 7a of the main tank 1 is provided with restriction means 11. As illustrated in FIG. Figure 2A , the two collectors 7a and 7b can meet, downstream of the restriction means 11, into a single collector 7.
  • the auxiliary reservoir 9 is arranged with respect to the main reservoir 1 and is dimensioned so as to receive at least a large part of the cryogenic fluid present in liquid form in the main reservoir 1.
  • the auxiliary reservoir 9 is shifted upwards with respect to the main tank 1.
  • the volume of the auxiliary reservoir 9 is such that the liquid 12 that is present there is surmounted by a free volume (that is to say, containing vaporized cryogen) relatively large corresponding at least to the greater part of the liquid cryogen present in the main tank 1.
  • the hot device 4 which is no longer immersed at least for the most part in the cryogenic liquid, is thermally decoupled therefrom.
  • the cryogenic liquid is spared and it is not discharged to the outside and lost as is the case in conventional installations such as that of the figure 1 .
  • the pressure drop in the restriction means 11 also decreases and thus the difference in the liquid levels in the two tanks is reduced until it reaches a point where the transfer of liquid from the auxiliary tank 9 to the main tank 1 can recover.
  • the auxiliary tank 9 discharges by gravity into the main tank 1 to return to the normal situation shown in FIG. Figure 2A with the device 4 again completely immersed in the cryogenic liquid.
  • ⁇ h transition / ⁇ h normal 100, that is to say for example an increase in the difference of the liquid levels of 1 cm to 1 m which easily allows the superconducting device 4 to emerge out of the liquid and the liquid to be backplaced.
  • cryogenic fluid whether in the liquid phase or in the vapor phase, do not occur, so that the arrangements according to the invention can be implemented without limitation. It is sufficient only that the outlet manifold 7a and the restriction means 11 are appropriately sized according to the properties of the cryogenic fluid in its liquid and gaseous phases, and also as a function of the thermal loads provided during normal operation.
  • the restriction means 11 comprise a fixed restriction 14 inserted in the conduit 7a.
  • the restriction means 11 may comprise, in place of the aforementioned fixed restriction 14, an externally actuated valve 15 as illustrated in FIG. figure 3 .
  • Such an arrangement makes it possible in particular to increase the effectiveness of the liquid cryogen reflux and to control the restart of the transfer of the liquid cryogen to the main tank 1 and the resumption of cooling of the superconducting device 4.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Containers, Films, And Cooling For Superconductive Devices (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)

Claims (5)

  1. Tiefstemperaturkühlanlage für supraleitende Vorrichtung, Folgendes aufweisend:
    - einen Hauptbehälter (1) für ein kryogenes Zweiphasenfluid, in das eine supraleitende, zu kühlende Vorrichtung (4) eingetaucht ist,
    - eine Leitung (5) zum Versorgen mit kryogenem Fluid, die funktional mit dem Behälter (1) zu dessen Versorgen mit kryogenem Fluid verbunden ist,
    - Mittel (6) zum Steuern des Versorgens mit kryogenem Fluid, die in der Versorgungsleitung (5) angeordnet sind, und ein Hilfsbehälter (9),
    - wobei der Hilfsbehälter (9) in Bezug auf den Hauptbehälter (1) derart angeordnet ist und bemessen ist, dass er zumindest einen großen Teil des kryogenen Fluids, das in flüssiger Form (2) in dem Hauptbehälter (1) gegenwärtig ist, aufnehmen kann,
    - wobei die Versorgungsleitung (5) mit kryogenem Fluid an den Hilfsbehälter (9) angeschlossen ist, dadurch gekennzeichnet, dass sie ferner Folgendes aufweist:
    - eine Leitung (10) zum hydrostatischen Anschließen, die zwischen den jeweiligen Böden des Hauptbehälters (1) und des Hilfsbehälters (9) eingefügt ist,
    - einen Ausgangssammler (7a), der an den Hauptbehälter (1) angeschlossen ist und
    - einen Ausgangssammler (7b), der an den Hilfsbehälter (9) angeschlossen ist,
    - wobei Drosselmittel (11) in den Ausgangssammler (7a), der an den Hauptbehälter (1) angeschlossen ist, eingebaut sind,
    wodurch bei Gegenwart eines schnellen Erhitzens der supraleitenden Vorrichtung kryogenes Fluid im flüssigen Zustand, das in dem Hauptbehälter gegenwärtig ist, unter der Einwirkung des Drucks des verdampften kryogenen Fluids in den Hilfsbehälter gefördert wird, aus dem es wieder schwerkraftbedingt zu dem Hauptbehälter fließt, wenn der Druck des verdampften Fluids abnimmt.
  2. Anlage nach Anspruch 1, dadurch gekennzeichnet, dass der Hilfsbehälter (9) im Wesentlichen höher angeordnet ist als der Hauptbehälter (1).
  3. Anlage nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass Mittel zum Erfassen (8) des Niveaus des flüssigen kryogenen Fluids (12) in dem Hilfsbehälter (9) angeordnet sind.
  4. Anlage nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Drosselmittel (11) eine Drosselung (14) aufweisen.
  5. Anlage nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Drosselmittel (11) einen Schieber (15) mit externer Steuerung aufweisen.
EP06709162A 2005-01-27 2006-01-24 Installation zum kryogenen kühlen für supraleitervorrichtung Expired - Lifetime EP1842013B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0500861A FR2881216B1 (fr) 2005-01-27 2005-01-27 Installation de refroidissement cryogenique pour dispositif supraconducteur
PCT/FR2006/000163 WO2006079711A1 (fr) 2005-01-27 2006-01-24 Installation de refroidissement cryogenique pour dispositif supraconducteur

Publications (2)

Publication Number Publication Date
EP1842013A1 EP1842013A1 (de) 2007-10-10
EP1842013B1 true EP1842013B1 (de) 2008-08-13

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP06709162A Expired - Lifetime EP1842013B1 (de) 2005-01-27 2006-01-24 Installation zum kryogenen kühlen für supraleitervorrichtung

Country Status (6)

Country Link
US (1) US8069679B2 (de)
EP (1) EP1842013B1 (de)
AT (1) ATE404829T1 (de)
DE (1) DE602006002248D1 (de)
FR (1) FR2881216B1 (de)
WO (1) WO2006079711A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108562085B (zh) * 2018-04-13 2020-10-27 杭州制氧机集团股份有限公司 一种利用常压过冷液氮冷却高温超导元件的装置及方法

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3537271A (en) * 1968-08-08 1970-11-03 Atomic Energy Commission Level control for cryogenic liquids
US3880193A (en) * 1974-02-07 1975-04-29 Hydril Co Surge absorber for cryogenic fluids
FR2308068A1 (fr) * 1975-04-18 1976-11-12 Anvar Dispositifs pour maintenir constant le niveau d'un bain cryogenique
JPS607396B2 (ja) * 1976-05-31 1985-02-23 株式会社東芝 超電導装置
DE3336466A1 (de) * 1983-10-06 1985-04-18 Linde Ag, 6200 Wiesbaden Verfahren und vorrichtung zum einspeisen einer kuehlfluessigkeit in einen behaelter
JPH065648B2 (ja) * 1985-09-30 1994-01-19 株式会社東芝 超電導磁石装置
US4852357A (en) * 1988-10-14 1989-08-01 Ncr Corporation Cryogenic liquid pump
US5220800A (en) * 1990-12-10 1993-06-22 Bruker Analytische Messtechnik Gmbh Nmr magnet system with superconducting coil in a helium bath
DE4107320C2 (de) * 1991-03-07 2001-08-02 Hellmuth Sitte Vorrichtung zum kontinuierlichen Nachfüllen von Flüssigstickstoff in Kühlkammern
DE19509314C1 (de) * 1995-03-15 1996-07-11 Bruker Analytische Messtechnik Supraleitende Magnetanordnung für NMR-Spektrometer
JPH10132433A (ja) * 1996-10-30 1998-05-22 Railway Technical Res Inst 冷媒の循環方法及び冷却装置
JP2001066029A (ja) * 1999-08-25 2001-03-16 Toshiba Corp 極低温冷却システム

Also Published As

Publication number Publication date
DE602006002248D1 (de) 2008-09-25
US20080134691A1 (en) 2008-06-12
FR2881216A1 (fr) 2006-07-28
WO2006079711A1 (fr) 2006-08-03
US8069679B2 (en) 2011-12-06
EP1842013A1 (de) 2007-10-10
ATE404829T1 (de) 2008-08-15
FR2881216B1 (fr) 2007-04-06

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