WO2013085181A1 - Cooling system for superconductive magnets - Google Patents
Cooling system for superconductive magnets Download PDFInfo
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- WO2013085181A1 WO2013085181A1 PCT/KR2012/009912 KR2012009912W WO2013085181A1 WO 2013085181 A1 WO2013085181 A1 WO 2013085181A1 KR 2012009912 W KR2012009912 W KR 2012009912W WO 2013085181 A1 WO2013085181 A1 WO 2013085181A1
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- WIPO (PCT)
- Prior art keywords
- superconductive magnet
- superconductive
- vibration
- magnet
- cooling system
- Prior art date
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- 238000001816 cooling Methods 0.000 title claims abstract description 35
- 230000005855 radiation Effects 0.000 claims abstract description 13
- 239000004020 conductor Substances 0.000 claims abstract description 4
- 230000000903 blocking effect Effects 0.000 claims abstract description 3
- 239000012530 fluid Substances 0.000 claims description 28
- 238000007710 freezing Methods 0.000 claims description 25
- 230000008014 freezing Effects 0.000 claims description 25
- 238000001704 evaporation Methods 0.000 claims description 9
- 230000008020 evaporation Effects 0.000 claims description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 8
- 230000005494 condensation Effects 0.000 claims description 8
- 238000009833 condensation Methods 0.000 claims description 8
- 239000001307 helium Substances 0.000 claims description 4
- 229910052734 helium Inorganic materials 0.000 claims description 4
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 4
- 239000001257 hydrogen Substances 0.000 claims description 4
- 229910052739 hydrogen Inorganic materials 0.000 claims description 4
- 125000004435 hydrogen atom Chemical class [H]* 0.000 claims description 4
- 229910052754 neon Inorganic materials 0.000 claims description 4
- GKAOGPIIYCISHV-UHFFFAOYSA-N neon atom Chemical compound [Ne] GKAOGPIIYCISHV-UHFFFAOYSA-N 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 4
- 239000000284 extract Substances 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 description 5
- 239000002887 superconductor Substances 0.000 description 4
- 229910001275 Niobium-titanium Inorganic materials 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000020169 heat generation Effects 0.000 description 2
- RJSRQTFBFAJJIL-UHFFFAOYSA-N niobium titanium Chemical compound [Ti].[Nb] RJSRQTFBFAJJIL-UHFFFAOYSA-N 0.000 description 2
- 229910000657 niobium-tin Inorganic materials 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- KJSMVPYGGLPWOE-UHFFFAOYSA-N niobium tin Chemical compound [Nb].[Sn] KJSMVPYGGLPWOE-UHFFFAOYSA-N 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
- 229910021521 yttrium barium copper oxide Inorganic materials 0.000 description 1
Images
Classifications
-
- 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
-
- 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
- F25D19/00—Arrangement or mounting of refrigeration units with respect to devices or objects to be refrigerated, e.g. infrared detectors
Definitions
- This disclosure relates to a cooling system for superconductive magnets, and more particularly, to a cyrogenic cooling system for superconductive magnets, which decrease a temperature gradient between a freezer and a superconductive magnet to zero by using a vibration-type heat pipe to maximize cooling efficiency of the superconductive magnet.
- Superconducting phenomenon represents that a material abruptly loses electric resistance at a certain temperature and flows electricity without any restriction. There is a material which loses electric resistance and flows electricity without any restriction when being cooled to 0 degree in absolute temperature (-273 C), which is called a superconductor.
- the superconductor exhibits its property when being cooled to an extremely low temperature below a critical temperature.
- Niobium titanium (NbTi) and niobium tin (Nb 3 Sn)havingasuperconductingcharacteristicnearaliquidheliumtemperature(-268 C at 1 atm) are called a Low Temperature Superconductor (LST), and BSCCO-based materials having a superconducting characteristic near a liquid nitrogen temperature (-196 C at 1 atm) are called a High Temperature Superconductor (HTS).
- LST Low Temperature Superconductor
- HTS High Temperature Superconductor
- Material such as YBCO shows a superconducting characteristic between two temperatures.
- a conductive cooling method for cooling by means of thermal conductive characteristics of a metal by using a small cyrogenic freezer as a heat sink has been used in order to cool a superconductive magnet using a superconducting material.
- the cyrogenic freezer has deteriorated performance in a magnetic field generated by the superconductive magnet and thus should be spaced apart from the superconductive magnet by a predetermined distance. Therefore, a temperature gradient is generated along a cooling medium between the cyrogenic freezer and the superconductive magnet, which reduces the cooling efficiency.
- This disclosure is directed to providing a cyrogenic cooling system for superconductive magnets, which include a vibration-type heat pipe exchanging heat between a superconductive magnet and a freezer to effectively cool a superconductive magnet to an extremely low temperature so that a temperature gradient between the freezer and the superconductive magnet decreases to zero.
- a cooling system for superconductive magnets which includes: a vacuous container; a superconductive magnet forming a magnetic field; a superconductive magnet bobbin surrounding the superconductive magnet and made of thermally conductive material; a freezer for exchanging heat with the superconductive magnet bobbin to cool the superconductive magnet; a vibration-type heat pipe contacting the superconductive magnet bobbin to induce heat exchange with the freezer; and a radiation shield for blocking heat radiation introduced to the superconductive magnet.
- the freezer may include a first-stage freezing unit and a second-stage freezing unit, the first-stage freezing unit may be thermally connected to the radiation shield to minimize radiant heat introduced to the superconductive magnet from the outside, and the second-stage freezing unit may be thermally connected to the vibration-type heat pipe to extract heat from the vibration-type heat pipe.
- the vibration-type heat pipe may include a working fluid therein, the working fluid may liquefy by means of fluid cooling of the second-stage freezing unit in a condensation unit thermally connected to the second-stage freezing unit, the working fluid may evaporate by means of heat generated at the superconductive magnet in an evaporation unit thermally connected to the superconductive magnet bobbin, and heat may be extracted from the superconductive magnet to cool the superconductive magnet.
- the vibration-type heat pipe may repeat evaporation and condensation of the working fluid as the working fluid circulates therein, which extracts heat generated from the superconductive magnet to cool the superconductive magnet.
- the freezer and the superconductive magnet may be connected by means of the vibration-type heat pipe to eliminate the generation of a temperature gradient.
- the working fluid may include at least one of helium, hydrogen, neon, nitrogen and their mixtures.
- vibration-type heat pipe it is possible to implement a stable cyrogenic cooling system which may absorb an abundant amount of heat energy generated at the superconductive magnet by using latent heat of the working fluid in the superconductive magnet and transfer the heat energy to the freezer to recover a superconducting status within a short time.
- the number and size of freezers may be selected by determining a cooling capacity depending on the size of the superconductive magnet, namely the amount of heat generation, and the number of vibration-type heat pipes may also be determined accordingly. Therefore, it is possible to efficiently cool the superconductive magnet.
- Fig. 1 is a schematic view showing a cooling system for superconductive magnets according to the present disclosure.
- Fig. 2 is a schematic view showing a vibration-type heat pipe according to the present disclosure.
- Fig. 1 is a schematic view showing a cooling system for superconductive magnets according to the present disclosure.
- the cooling system for superconductive magnets includes a vacuous container 14, a superconductive magnet 10, a superconductive magnet bobbin 11, a freezer 12, a vibration-type heat pipe 16, and a radiation shield 13.
- the vacuous container 14 maintains the inside of the cooling system for superconductive magnets in a vacuous status.
- the superconductive magnet 10 forms a magnetic field, and the superconductive magnet bobbin 11 surrounds the superconductive magnet 10 and is made of thermally conductive material.
- the freezer 12 exchanges heat with the superconductive magnet bobbin 11 and cools the superconductive magnet 10.
- the vibration-type heat pipe 16 contacts the superconductive magnet bobbin 11 to induce heat exchange with the freezer 12.
- the radiation shield 13 blocks heat radiation introduced to the superconductive magnet 10.
- the superconductive magnet 10 is surrounded by the superconductive magnet bobbin 11 fabricated by winding a superconductive wire, and electric current is supplied to the superconductive magnet bobbin 11 through a current leading wire 17 from the outside of a vacuous container 14 so that the superconductive magnet 10 may generate a magnetic field.
- the superconductive magnet bobbin 11 contacts one end of the vibration-type heat pipe 16.
- the other end of the vibration-type heat pipe 16 contacts the freezer 12.
- the freezer 12 has a two-stage cooling structure including a first-stage freezing unit 12a and a second-stage freezing unit 12b.
- a cooling capacity is supplied from a main body of the freezer 12 provided out of the vacuous container 14, and the first-stage freezing unit 12a contacts the radiation shield 13 at its outside and cools radiant heat introduced to the superconductive magnet 10.
- the second-stage freezing unit 12b contacts a thermal link 15, and the thermal link 15 contacts one end of the vibration-type heat pipe 16.
- the thermal link 15 exchanges heat between the second-stage freezing unit 12b and one end of the vibration-type heat pipe 16.
- the first-stage freezing unit 12a is thermally connected to the radiation shield 13 to minimize radiant heat introduced to the superconductive magnet 10 from the outside
- the second-stage freezing unit 12b is thermally connected to the vibration-type heat pipe 16 to extract heat from the vibration-type heat pipe 16 so that the superconductive magnet 10 may be cooled to an extremely low temperature.
- Fig. 2 is a schematic view showing a vibration-type heat pipe according to the present disclosure.
- the vibration-type heat pipe 16 may include a condensation unit (a heat absorption unit) 19 and an evaporation unit (a heat emitting unit) 18.
- the vibration-type heat pipe 16 includes a pipe 20 extending and repeatedly bending between the condensation unit 19 and the evaporation unit 18.
- the extending pipe 20 contains a working fluid which may be cooled to an extremely low temperature.
- the condensation unit 19 is connected to the thermal link 15 and is thermally connected to the second-stage freezing unit 12b of the freezer 12.
- the working fluid is condensed by means of the cooling capacity of the second-stage freezing unit 12b.
- the evaporation unit 18 contacts the superconductive magnet bobbin 11 surrounding the superconductive magnet 10. The heat generated at the superconductive magnet 10 may be transferred to the evaporation unit 18 of the vibration-type heat pipe 16 through the superconductive magnet bobbin 11 to cool the superconductive magnet 10.
- the pipe 20 is filled with a working fluid in a gas state through a cyrogenic valve 21 provided at one end of the pipe 20 of the vibration-type heat pipe 16.
- the freezer 12 is operated so that the working fluid liquefies, and the liquefied working fluid initially cools the superconductive magnet 10.
- the working fluid circulates in the pipe 20 to reciprocate between the condensation unit 19 and the evaporation unit 18, and so it is not needed to additionally supply a working fluid afterwards.
- the working fluid may be selected as desired according to the operating condition of the superconductive magnet 10.
- the working fluid may use any one of helium (He), hydrogen (H 2 ),neon(Ne),andnitrogen(N 2 ),whichmayalsobeusedinmixture.
- the operating temperature may range from 3K to 10K in case of using helium as the working fluid circulating in the pipe 20, the operating temperature may range from 17K to 26K in case of using hydrogen, the operating temperature may range from 27K to 34K in case of using neon, and the operating temperature may range from 65K to 90K in case of using nitrogen. Since the working fluid may be selected as desired according to the operating condition of the superconductive magnet 10, the heat transfer efficiency may be maximized in a wide temperature range.
- the vibration-type heat pipe 16 of the present disclosure may have a small design regardless of the distance to a subject to be cooled, namely the superconductive magnet 10, and may also cool a subject far away from the freezer 12 without a temperature gradient. If the superconducting characteristic is lost (namely, quench) while the cooling system for superconductive magnets is in operation, since the working fluid is present in the vibration-type heat pipe 16 of the present disclosure, an abundant amount of heat energy generated at the superconductive magnet 10 may be absorbed by using latent heat of the working fluid, and the energy may be transferred to the freezer 12 to recover a superconducting status within a short time. Therefore, the present disclosure may be regarded as a very stable cyrogenic cooling system.
- two or more vibration-type heat pipes 16 may be provided, and the number and size of freezers 12 may also be selected according to the size of the superconductive magnet 10, namely the amount of heat generation. Accordingly, the number of vibration-type heat pipes 16 is determined. Therefore, it is possible to ensure optimized cyrogenic cooling.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Containers, Films, And Cooling For Superconductive Devices (AREA)
Abstract
A cooling system for superconductive magnets according to the present disclosure includes a vacuous container, a superconductive magnet forming a magnetic field, a superconductive magnet bobbin surrounding the superconductive magnet and made of thermally conductive material, a freezer for exchanging heat with the superconductive magnet bobbin to cool the superconductive magnet, a vibration-type heat pipe contacting the superconductive magnet bobbin to induce heat exchange with the freezer, and a radiation shield for blocking heat radiation introduced to the superconductive magnet. Therefore, it is possible to implement a stable cyrogenic cooling system, which may eliminate the generation of a temperature gradient between the freezer and the superconductive magnet so that the superconductive magnet may be efficiently cooled and may recover a superconducting status within a short time.
Description
This disclosure relates to a cooling system for superconductive magnets, and more particularly, to a cyrogenic cooling system for superconductive magnets, which decrease a temperature gradient between a freezer and a superconductive magnet to zero by using a vibration-type heat pipe to maximize cooling efficiency of the superconductive magnet.
Superconducting phenomenon represents that a material abruptly loses electric resistance at a certain temperature and flows electricity without any restriction. There is a material which loses electric resistance and flows electricity without any restriction when being cooled to 0 degree in absolute temperature (-273 C), which is called a superconductor. The superconductor exhibits its property when being cooled to an extremely low temperature below a critical temperature. Niobium titanium (NbTi) and niobium tin (Nb3Sn)havingasuperconductingcharacteristicnearaliquidheliumtemperature(-268 C at 1 atm) are called a Low Temperature Superconductor (LST), and BSCCO-based materials having a superconducting characteristic near a liquid nitrogen temperature (-196 C at 1 atm) are called a High Temperature Superconductor (HTS). Material such as YBCO shows a superconducting characteristic between two temperatures.
Recently, a conductive cooling method for cooling by means of thermal conductive characteristics of a metal by using a small cyrogenic freezer as a heat sink has been used in order to cool a superconductive magnet using a superconducting material. However, the cyrogenic freezer has deteriorated performance in a magnetic field generated by the superconductive magnet and thus should be spaced apart from the superconductive magnet by a predetermined distance. Therefore, a temperature gradient is generated along a cooling medium between the cyrogenic freezer and the superconductive magnet, which reduces the cooling efficiency.
This disclosure is directed to providing a cyrogenic cooling system for superconductive magnets, which include a vibration-type heat pipe exchanging heat between a superconductive magnet and a freezer to effectively cool a superconductive magnet to an extremely low temperature so that a temperature gradient between the freezer and the superconductive magnet decreases to zero.
In one general aspect, there is provided a cooling system for superconductive magnets, which includes: a vacuous container; a superconductive magnet forming a magnetic field; a superconductive magnet bobbin surrounding the superconductive magnet and made of thermally conductive material; a freezer for exchanging heat with the superconductive magnet bobbin to cool the superconductive magnet; a vibration-type heat pipe contacting the superconductive magnet bobbin to induce heat exchange with the freezer; and a radiation shield for blocking heat radiation introduced to the superconductive magnet.
The freezer may include a first-stage freezing unit and a second-stage freezing unit, the first-stage freezing unit may be thermally connected to the radiation shield to minimize radiant heat introduced to the superconductive magnet from the outside, and the second-stage freezing unit may be thermally connected to the vibration-type heat pipe to extract heat from the vibration-type heat pipe.
The vibration-type heat pipe may include a working fluid therein, the working fluid may liquefy by means of fluid cooling of the second-stage freezing unit in a condensation unit thermally connected to the second-stage freezing unit, the working fluid may evaporate by means of heat generated at the superconductive magnet in an evaporation unit thermally connected to the superconductive magnet bobbin, and heat may be extracted from the superconductive magnet to cool the superconductive magnet.
The vibration-type heat pipe may repeat evaporation and condensation of the working fluid as the working fluid circulates therein, which extracts heat generated from the superconductive magnet to cool the superconductive magnet.
The freezer and the superconductive magnet may be connected by means of the vibration-type heat pipe to eliminate the generation of a temperature gradient.
The working fluid may include at least one of helium, hydrogen, neon, nitrogen and their mixtures.
According to the present disclosure, by providing a vibration-type heat pipe between a first-stage freezing unit and a second-stage freezing unit of a freezer and a superconductive magnet, it is possible to eliminate the generation of a temperature gradient between the freezer and the superconductive magnet and thus efficiently cool the superconductive magnet.
In addition, by using the vibration-type heat pipe, it is possible to implement a stable cyrogenic cooling system which may absorb an abundant amount of heat energy generated at the superconductive magnet by using latent heat of the working fluid in the superconductive magnet and transfer the heat energy to the freezer to recover a superconducting status within a short time.
The number and size of freezers may be selected by determining a cooling capacity depending on the size of the superconductive magnet, namely the amount of heat generation, and the number of vibration-type heat pipes may also be determined accordingly. Therefore, it is possible to efficiently cool the superconductive magnet.
The above and other aspects, features and advantages of the disclosed exemplary embodiments will be more apparent from the following detailed description taken in conjunction with the accompanying drawings in which:
Fig. 1 is a schematic view showing a cooling system for superconductive magnets according to the present disclosure; and
Fig. 2 is a schematic view showing a vibration-type heat pipe according to the present disclosure.
Hereinafter, a configuration of a cooling system for superconductive magnets according to the present disclosure will be described in detail with reference to the accompanying drawings. Fig. 1 is a schematic view showing a cooling system for superconductive magnets according to the present disclosure. Referring to Fig. 1, the cooling system for superconductive magnets includes a vacuous container 14, a superconductive magnet 10, a superconductive magnet bobbin 11, a freezer 12, a vibration-type heat pipe 16, and a radiation shield 13. The vacuous container 14 maintains the inside of the cooling system for superconductive magnets in a vacuous status. The superconductive magnet 10 forms a magnetic field, and the superconductive magnet bobbin 11 surrounds the superconductive magnet 10 and is made of thermally conductive material. The freezer 12 exchanges heat with the superconductive magnet bobbin 11 and cools the superconductive magnet 10. The vibration-type heat pipe 16 contacts the superconductive magnet bobbin 11 to induce heat exchange with the freezer 12. The radiation shield 13 blocks heat radiation introduced to the superconductive magnet 10.
The superconductive magnet 10 is surrounded by the superconductive magnet bobbin 11 fabricated by winding a superconductive wire, and electric current is supplied to the superconductive magnet bobbin 11 through a current leading wire 17 from the outside of a vacuous container 14 so that the superconductive magnet 10 may generate a magnetic field. The superconductive magnet bobbin 11 contacts one end of the vibration-type heat pipe 16. In addition, the other end of the vibration-type heat pipe 16 contacts the freezer 12. The freezer 12 has a two-stage cooling structure including a first-stage freezing unit 12a and a second-stage freezing unit 12b. A cooling capacity is supplied from a main body of the freezer 12 provided out of the vacuous container 14, and the first-stage freezing unit 12a contacts the radiation shield 13 at its outside and cools radiant heat introduced to the superconductive magnet 10. The second-stage freezing unit 12b contacts a thermal link 15, and the thermal link 15 contacts one end of the vibration-type heat pipe 16. The thermal link 15 exchanges heat between the second-stage freezing unit 12b and one end of the vibration-type heat pipe 16. In other words, the first-stage freezing unit 12a is thermally connected to the radiation shield 13 to minimize radiant heat introduced to the superconductive magnet 10 from the outside, and the second-stage freezing unit 12b is thermally connected to the vibration-type heat pipe 16 to extract heat from the vibration-type heat pipe 16 so that the superconductive magnet 10 may be cooled to an extremely low temperature.
Fig. 2 is a schematic view showing a vibration-type heat pipe according to the present disclosure. Referring to Fig. 2, the vibration-type heat pipe 16 may include a condensation unit (a heat absorption unit) 19 and an evaporation unit (a heat emitting unit) 18. The vibration-type heat pipe 16 includes a pipe 20 extending and repeatedly bending between the condensation unit 19 and the evaporation unit 18.
The extending pipe 20 contains a working fluid which may be cooled to an extremely low temperature. The condensation unit 19 is connected to the thermal link 15 and is thermally connected to the second-stage freezing unit 12b of the freezer 12. The working fluid is condensed by means of the cooling capacity of the second-stage freezing unit 12b. The evaporation unit 18 contacts the superconductive magnet bobbin 11 surrounding the superconductive magnet 10. The heat generated at the superconductive magnet 10 may be transferred to the evaporation unit 18 of the vibration-type heat pipe 16 through the superconductive magnet bobbin 11 to cool the superconductive magnet 10.
In an initial stage, the pipe 20 is filled with a working fluid in a gas state through a cyrogenic valve 21 provided at one end of the pipe 20 of the vibration-type heat pipe 16. After that, the freezer 12 is operated so that the working fluid liquefies, and the liquefied working fluid initially cools the superconductive magnet 10. Once being supplied, the working fluid circulates in the pipe 20 to reciprocate between the condensation unit 19 and the evaporation unit 18, and so it is not needed to additionally supply a working fluid afterwards.
The working fluid may be selected as desired according to the operating condition of the superconductive magnet 10. The working fluid may use any one of helium (He), hydrogen (H2),neon(Ne),andnitrogen(N2),whichmayalsobeusedinmixture. The operating temperature may range from 3K to 10K in case of using helium as the working fluid circulating in the pipe 20, the operating temperature may range from 17K to 26K in case of using hydrogen, the operating temperature may range from 27K to 34K in case of using neon, and the operating temperature may range from 65K to 90K in case of using nitrogen. Since the working fluid may be selected as desired according to the operating condition of the superconductive magnet 10, the heat transfer efficiency may be maximized in a wide temperature range.
In addition, the vibration-type heat pipe 16 of the present disclosure may have a small design regardless of the distance to a subject to be cooled, namely the superconductive magnet 10, and may also cool a subject far away from the freezer 12 without a temperature gradient. If the superconducting characteristic is lost (namely, quench) while the cooling system for superconductive magnets is in operation, since the working fluid is present in the vibration-type heat pipe 16 of the present disclosure, an abundant amount of heat energy generated at the superconductive magnet 10 may be absorbed by using latent heat of the working fluid, and the energy may be transferred to the freezer 12 to recover a superconducting status within a short time. Therefore, the present disclosure may be regarded as a very stable cyrogenic cooling system.
As shown in Fig. 2, two or more vibration-type heat pipes 16 may be provided, and the number and size of freezers 12 may also be selected according to the size of the superconductive magnet 10, namely the amount of heat generation. Accordingly, the number of vibration-type heat pipes 16 is determined. Therefore, it is possible to ensure optimized cyrogenic cooling.
By using the cooling system for superconductive magnets as described above, it is possible to implement a stable cyrogenic cooling system which may eliminate the generation of a temperature gradient between the freezer and the superconductive magnet so that the superconductive magnet may be efficiently cooled and to recover a superconducting status within a short time.
While the exemplary embodiments have been shown and described, it will be understood by those skilled in the art that various changes in form and details may be made thereto without departing from the spirit and scope of this disclosure as defined by the appended claims.
by providing a vibration-type heat pipe between a first-stage freezing unit and a second-stage freezing unit of a freezer and a superconductive magnet, it is possible to eliminate the generation of a temperature gradient between the freezer and the superconductive magnet and thus efficiently cool the superconductive magnet.
Claims (6)
- A cooling system for superconductive magnets, comprising:a vacuous container;a superconductive magnet forming a magnetic field;a superconductive magnet bobbin surrounding the superconductive magnet and made of thermally conductive material;a freezer for exchanging heat with the superconductive magnet bobbin to cool the superconductive magnet;a vibration-type heat pipe contacting the superconductive magnet bobbin to induce heat exchange with the freezer; anda radiation shield for blocking heat radiation introduced to the superconductive magnet.
- The cooling system for superconductive magnets according to claim 1,wherein the freezer includes a first-stage freezing unit and a second-stage freezing unit,wherein the first-stage freezing unit is thermally connected to the radiation shield to minimize radiant heat introduced to the superconductive magnet from the outside, andwherein the second-stage freezing unit is thermally connected to the vibration-type heat pipe to extract heat from the vibration-type heat pipe.
- The cooling system for superconductive magnets according to claim 2,wherein the vibration-type heat pipe includes a working fluid therein,wherein the working fluid liquefies by means of fluid cooling of the second-stage freezing unit in a condensation unit thermally connected to the second-stage freezing unit,wherein the working fluid evaporates by means of heat generated at the superconductive magnet in an evaporation unit thermally connected to the superconductive magnet bobbin, andwherein heat is extracted from the superconductive magnet to cool the superconductive magnet.
- The cooling system for superconductive magnets according to claim 3,wherein the vibration-type heat pipe repeats evaporation and condensation of the working fluid as the working fluid circulates therein, which extracts heat generated from the superconductive magnet to cool the superconductive magnet.
- The cooling system for superconductive magnets according to claim 4,wherein the freezer and the superconductive magnet are connected by means of the vibration-type heat pipe to eliminate the generation of a temperature gradient.
- The cooling system for superconductive magnets according to claim 3,wherein the working fluid includes at least one of helium, hydrogen, neon, nitrogen and their mixtures.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020110129716A KR20130063281A (en) | 2011-12-06 | 2011-12-06 | Cooling system for superconductive magnets |
| KR10-2011-0129716 | 2011-12-06 |
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| Publication Number | Publication Date |
|---|---|
| WO2013085181A1 true WO2013085181A1 (en) | 2013-06-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/KR2012/009912 WO2013085181A1 (en) | 2011-12-06 | 2012-11-22 | Cooling system for superconductive magnets |
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| Country | Link |
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| KR (1) | KR20130063281A (en) |
| WO (1) | WO2013085181A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110993246A (en) * | 2019-12-12 | 2020-04-10 | 中国科学院合肥物质科学研究院 | Long-path cooling system of space-propelled ground environment-simulated superconducting magnet system |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20160072817A (en) | 2014-12-15 | 2016-06-23 | 주식회사 아크인터랙티브 | System and method for providing movie using multi-viewpoint camera |
| KR20160086682A (en) | 2015-01-12 | 2016-07-20 | 한국전기연구원 | Conduction Cooled Superconducting Magnet Cooling Structure |
| KR101992751B1 (en) * | 2017-10-20 | 2019-09-30 | 한국기초과학지원연구원 | Superconductor connection property estimation apparatus and the method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001077434A (en) * | 1999-09-01 | 2001-03-23 | Mitsubishi Electric Corp | Superconducting magnet |
| JP2003086418A (en) * | 2001-09-11 | 2003-03-20 | Mitsubishi Electric Corp | Cryogenic device |
| JP2009243837A (en) * | 2008-03-31 | 2009-10-22 | Toshiba Corp | Very low temperature cooling device |
| US20100248968A1 (en) * | 2009-03-31 | 2010-09-30 | General Electric Company | Apparatus and method for cooling a superconducting magnetic assembly |
| US20110039707A1 (en) * | 2005-11-18 | 2011-02-17 | Magnex Scientific Limited | Superconducting magnet systems |
-
2011
- 2011-12-06 KR KR1020110129716A patent/KR20130063281A/en not_active Ceased
-
2012
- 2012-11-22 WO PCT/KR2012/009912 patent/WO2013085181A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001077434A (en) * | 1999-09-01 | 2001-03-23 | Mitsubishi Electric Corp | Superconducting magnet |
| JP2003086418A (en) * | 2001-09-11 | 2003-03-20 | Mitsubishi Electric Corp | Cryogenic device |
| US20110039707A1 (en) * | 2005-11-18 | 2011-02-17 | Magnex Scientific Limited | Superconducting magnet systems |
| JP2009243837A (en) * | 2008-03-31 | 2009-10-22 | Toshiba Corp | Very low temperature cooling device |
| US20100248968A1 (en) * | 2009-03-31 | 2010-09-30 | General Electric Company | Apparatus and method for cooling a superconducting magnetic assembly |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110993246A (en) * | 2019-12-12 | 2020-04-10 | 中国科学院合肥物质科学研究院 | Long-path cooling system of space-propelled ground environment-simulated superconducting magnet system |
| CN110993246B (en) * | 2019-12-12 | 2021-11-19 | 中国科学院合肥物质科学研究院 | Long-path cooling system of space-propelled ground environment-simulated superconducting magnet system |
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| KR20130063281A (en) | 2013-06-14 |
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