CN106526354A - Temperature-constant nitrogen fixation cooling system for high-temperature superconducting material test - Google Patents
Temperature-constant nitrogen fixation cooling system for high-temperature superconducting material test Download PDFInfo
- Publication number
- CN106526354A CN106526354A CN201610887904.XA CN201610887904A CN106526354A CN 106526354 A CN106526354 A CN 106526354A CN 201610887904 A CN201610887904 A CN 201610887904A CN 106526354 A CN106526354 A CN 106526354A
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- Prior art keywords
- temperature
- fixed nitrogen
- cold screen
- outer cylinder
- cooling system
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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- 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
- F25B29/00—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/30—Automatic controllers with an auxiliary heating device affecting the sensing element, e.g. for anticipating change of temperature
- G05D23/32—Automatic controllers with an auxiliary heating device affecting the sensing element, e.g. for anticipating change of temperature with provision for adjustment of the effect of the auxiliary heating device, e.g. a function of time
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- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
The invention discloses a temperature-constant nitrogen fixation cooling system for high-temperature superconducting material test. The system comprises a frame (10), a cooler mounted in the top of the frame (10), and an out cylinder, a cold shield and a nitrogen fixation cavity (5) suspended in the bottom side of the top of the frame (10), the cold shield is arranged in the outer cylinder, the nitrogen fixation cavity (5) is arranged in the cold shield, and a cold conduction rod (4) of the cooler (1) extends into the nitrogen fixation cavity (5); and the system is characterized in that the cold conduction rod (4) of the cooler (1) is provided with an electric heater (6) and a first temperature sensor (7), and the electric heater (6) and the first temperature sensor (7) are electrically connected with a temperature controller outside the outer cylinder. When the system is used for testing a thermoelectric characteristic of the high-temperature superconducting material, operation is simple and convenient, the system can be kept in the constant temperature automatically, and a test result is more accurate and more reliable.
Description
Technical field
The present invention relates to high temperature superconducting materia test low-temperature cooling system, be specifically it is a kind of be easy to handling can
Temperature control fixed nitrogen cooling system.
Background technology
As the performance of high-temperature superconductor band is improved constantly, by the high-temperature superconducting magnet of high-temperature superconductor band coiling in electric power
Using more and more extensive, such as superconducting energy storage, superconducting motor and superconducting transformer etc. in system.To high-temperature superconductive magnet system
Stability requirement also more and more higher.And the stability of superconducting magnet system depends primarily on stablizing for its low-temperature cooling system
Property.As the development of refrigeration machine, refrigeration machine can be easily achieved the temperature of below 10K, it is cold that this has greatly facilitated refrigeration machine
The application of high-temperature superconductive magnet system but.The maximum advantage of refrigeration machine conduction cooling is easy to operate, compact conformation, operation
Low cost.It is relatively low yet with refrigeration machine cooling power, if magnet excitation excessive velocities, or be subject in running
Big local thermal agitation, causes magnet temperature rise too high, and magnet is just easy to quench so that the high-temperature superconducting magnet of cryocooled
The stability of system is greatly affected.As fixed nitrogen has very high thermal capacitance at low temperature, fixed nitrogen can be as superconducting magnetic system
The excess refrigerant of system, when magnet temperature rise is too high, fixed nitrogen can absorb magnet heating and reduce magnet temperature rise, super so as to improve
The heat endurance of magnetic conductor system.The fixed nitrogen refrigeration system of this refrigeration machine+fixed nitrogen is obtained in superconducting magnet system at present
It is widely applied.
In order to design the high-temperature superconductive magnet system of more rational fixed nitrogen refrigeration, need to obtain fixed nitrogen cooling condition
Under, the pyroelecthc properties of the corresponding high temperature superconducting materia of different temperatures and its coil.Current existing fixed nitrogen cooling system both at home and abroad
Can not carry out temperature automatically controlled.During test pyroelecthc properties, opening refrigeration machine is needed to be freezed, system temperature is quickly reduced, when
When tester observes that the temperature that the thermometric instrument of system shows drops to test temperature value, stop or disconnect refrigeration machine, then enter
The related pyroelecthc properties test operation of row.Due to the insulation effect of fixed nitrogen after refrigeration machine shutdown or disconnection, the temperature of system will be slow
It is slow to rise so that related pyroelecthc properties test operation is not yet completed, and system temperature has gone up.Now it is switched on or connects again
Refrigeration machine, system temperature is again quick to be reduced, and tester need to keep the notice of height in the process, set when temperature is reduced to
Need to turn off immediately when determining test temperature or disconnect refrigeration machine.So circulate, finally complete the high-temperature superconductor band under design temperature
And its pyroelecthc properties test of coil.Its exist problem be：1st, need to observe thermometric instrument at any time, repeatedly carry out refrigeration machine
Open, stop or opening operation, complex operation, operating personnel are had high demands.2nd, when pyroelecthc properties are tested, temperature is simultaneously not kept at one
On individual stable steady state value, but in the variable condition of bound, the accuracy of its test result, accuracy need to be carried
It is high.3rd, refrigeration machine opens, stops frequently reduce the service life of refrigeration machine；Carried out using the refrigeration system that can be disconnected non-stop-machine
Opening operation, though not affecting the refrigeration machine life-span, need to install disconnection device additional, and the complexity raising of system, reliability are reduced.
The content of the invention
It is an object of the invention to provide a kind of constant temperature fixed nitrogen cooling system for high temperature superconducting materia test, system use
When high temperature superconducting materia pyroelecthc properties are tested, simple to operation, system can be automatically held in the constant temperature of setting, its test knot
Fruit is more accurate, reliable.
The technical scheme adopted by the invention for realizing the object of the invention is：A kind of constant temperature for high temperature superconducting materia test
Fixed nitrogen cooling system, outer cylinder body that the refrigeration machine installed including frame, frame top, frame top bottom surface hang, cold screen and solid
Nitrogen chamber；And cold screen is placed in outer cylinder body, fixed nitrogen chamber is placed in cold screen again；The cool guiding rod of refrigeration machine is stretched in fixed nitrogen chamber；Its feature
It is：Electric heater and temperature sensor one, and electric heater and temperature sensor are housed on the cool guiding rod of described refrigeration machine
One is electrically connected with the temperature controller outside outer cylinder body.
Working process and principle of the invention are：
High-temperature superconductor sample is placed in fixed nitrogen chamber, starts refrigeration machine；After fixed nitrogen chamber is cooled to liquid nitrogen temperature, to fixed nitrogen
Liquid nitrogen being injected in chamber, continuing cooling, liquid nitrogen is converted to fixed nitrogen；Cooling is further continued for until fixed nitrogen chamber temperature reaches setting value.Now
Temperature controller carries out feedback control by the temperature in a pair of fixed nitrogen chambers of temperature sensor, i.e.,：When temperature is less than design temperature, temperature control
Instrument passes to setting electric current to electric heater, and electric heater heating makes fixed nitrogen chamber heat up；When temperature is higher than setting value, temperature controller
Then control heater power to reduce or quit work, make fixed nitrogen chamber lower the temperature；So that fixed nitrogen cavity temperature is remained at and is set
Fixed constant temperature value.In this constant temperature stage, operator carries out the high temperature superconducting materia pyroelecthc properties test of correlation simultaneously, until test
Complete.
Compared with prior art, the invention has the beneficial effects as follows：
First, in the pyroelecthc properties test process to high temperature superconducting materia, temperature sensor one and electricity are passed through by temperature controller
Heater carries out feedback control to the temperature in fixed nitrogen chamber, enables fixed nitrogen chamber temperature to be maintained at the temperature of setting for a long time.Operator
Member need to only carry out the associative operation of pyroelecthc properties test, and without the need for manual observation temperature, manually open, stop or disconnect refrigeration.Its behaviour
Make simple and convenient, operating personnel are required low.
When the 2nd, testing, temperature is automatically held in the constant temperature value of setting, and the control to temperature is more accurate, so that its survey
High temperature superconducting materia pyroelecthc properties data under the design temperature for going out are more accurate, reliable.
3rd, refrigeration machine need to only carry out the operation of startup-shutdown, it is to avoid damage of the frequent startup-shutdown to refrigeration machine；Simultaneously
Without the need for installing disconnection device to refrigeration system additional, the cost of test is reduced.
Above-mentioned outer cylinder body is connected and composed by flange by upper shell and lower shell；Described cold screen is cold with by upper cold screen
Screen is connected and composed by flange.
So, only need to pull down lower shell and under cold screen, you can take out fixed nitrogen chamber from bottom.So that superconductor test sample
Placement in the fixed nitrogen chamber and take out extremely convenient.
The lead of connection high-temperature superconductor sample is provided with above-mentioned fixed nitrogen chamber, and the lead extends upward through upper cold from fixed nitrogen chamber
It is connected with current source after screen and upper shell；Part of the described lead in cold screen and fixed nitrogen chamber is by high temperature superconducting materia system
Into, and the position that the lead is located in cold screen is provided with temperature sensor two.
So, the major part of lead is made up of high temperature superconducting materia, and its electric heating measuring is minimum so that the refrigeration of whole system
In hgher efficiency, stability is more preferable；Meanwhile, arrange temperature sensor on the lead in cold screen, its temperature can be detected, when send out
When existing wire temperature exceedes superconduction critical temperature, system is closed immediately, to avoid quenching lead due to a variety of causes, heating is acute
Increasing causes the system failure even accident.
The present invention is described in further detail with reference to the accompanying drawings and detailed description.
Description of the drawings
Overall structure sectional views of the Fig. 1 for the embodiment of the present invention.
Specific implementation method
Embodiment
Fig. 1 illustrates, a kind of specific embodiment of the present invention is, a kind of constant temperature fixed nitrogen for high temperature superconducting materia test
Cooling system, including install at the top of frame 10, frame 10 refrigeration machine 1,10 top bottom surface of frame hang outer cylinder body, cold screen and
Fixed nitrogen chamber 5；And cold screen is placed in outer cylinder body, fixed nitrogen chamber 5 is placed in cold screen again；The cool guiding rod 4 of refrigeration machine 1 is stretched in fixed nitrogen chamber 5；
It is characterized in that：Electric heater 6 and temperature sensor 1, and 6 He of electric heater are housed on the cool guiding rod 4 of described refrigeration machine 1
Temperature sensor 1 is electrically connected with the temperature controller outside outer cylinder body.
The outer cylinder body of this example is connected and composed by flange by upper shell 8a and lower shell 8b；Described cold screen is by upper cold screen 9a
Cold screen 9b is connected and composed by flange with.
The lead 2 of connection high-temperature superconductor sample is provided with the fixed nitrogen chamber 5 of this example, and the lead 2 is extended upward through from fixed nitrogen chamber 5
It is connected with current source after upper cold screen 9a and upper shell 8a；Described lead 2 is surpassed by high temperature positioned at the part in cold screen and fixed nitrogen chamber 5
Lead material to make, and the position that the lead 2 is located in cold screen is provided with temperature sensor 23.
Claims (3)
1. a kind of constant temperature fixed nitrogen cooling system for high temperature superconducting materia test, pacifies including at the top of frame (10), frame (10)
Bottom surface hangs at the top of the refrigeration machine (1) of dress, frame (10) outer cylinder body, cold screen and fixed nitrogen chamber (5)；And cold screen is placed in outer cylinder body
In, fixed nitrogen chamber (5) be placed in cold screen again；The cool guiding rod (4) of refrigeration machine (1) is stretched in fixed nitrogen chamber (5)；It is characterized in that：It is described
Refrigeration machine (1) cool guiding rod (4) on electric heater (6) and temperature sensor one (7), and electric heater (6) and temperature are housed
Sensor one (7) is electrically connected with the temperature controller outside outer cylinder body.
2. a kind of constant temperature fixed nitrogen cooling system for high temperature superconducting materia test according to claim 1, its feature exists
In：Described outer cylinder body is connected and composed by flange by upper shell (8a) and lower shell (8b)；Described cold screen is by upper cold screen
(9a) cold screen (9b) is connected and composed by flange with.
3. a kind of constant temperature fixed nitrogen cooling system for high temperature superconducting materia test according to claim 1, its feature exists
In：The lead (2) of connection high-temperature superconductor sample is provided with described fixed nitrogen chamber (5), and the lead (2) is interior upwards from fixed nitrogen chamber (5)
It is connected with current source after upper cold screen (9a) and upper shell (8a)；Described lead (2) is located in cold screen and fixed nitrogen chamber (5)
Part is made up of high temperature superconducting materia, and the position that the lead (2) is located in cold screen is provided with temperature sensor two (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610887904.XA CN106526354A (en) | 2016-10-11 | 2016-10-11 | Temperature-constant nitrogen fixation cooling system for high-temperature superconducting material test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610887904.XA CN106526354A (en) | 2016-10-11 | 2016-10-11 | Temperature-constant nitrogen fixation cooling system for high-temperature superconducting material test |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106526354A true CN106526354A (en) | 2017-03-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610887904.XA Pending CN106526354A (en) | 2016-10-11 | 2016-10-11 | Temperature-constant nitrogen fixation cooling system for high-temperature superconducting material test |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111413567A (en) * | 2020-04-21 | 2020-07-14 | 清华大学 | System and method for testing current-carrying characteristics of superconducting tape |
| CN113834234A (en) * | 2021-09-30 | 2021-12-24 | 东方电气集团科学技术研究院有限公司 | Low temperature device based on preparation of nitrogen fixation cooling medium |
Citations (10)
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|---|---|---|---|---|
| JPH06325930A (en) * | 1993-05-12 | 1994-11-25 | Kobe Steel Ltd | Cooling system of ac magnet using oxide superconducting wire |
| JPH08248001A (en) * | 1995-03-09 | 1996-09-27 | Furukawa Electric Co Ltd:The | Apparatus for measuring physical properties under magnetic field |
| JP2002252380A (en) * | 2001-02-27 | 2002-09-06 | Sumitomo Heavy Ind Ltd | Superconducting magnet device and monitoring method therefor |
| CN101130179A (en) * | 2007-10-19 | 2008-02-27 | 中国科学院电工研究所 | Conduction cooling high temperature superconducting electric-magnetic iron remover based on nitrogen fixation protection |
| CN202794074U (en) * | 2012-09-28 | 2013-03-13 | 北京鼎臣超导科技有限公司 | High temperature superconduction temperature transition measuring device based upon cryogenic refrigerator |
| CN103901254A (en) * | 2014-04-19 | 2014-07-02 | 中国船舶重工集团公司第七一二研究所 | Critical current testing device for high-temperature superconductive wire |
| CN103985499A (en) * | 2014-04-19 | 2014-08-13 | 云南电力试验研究院（集团）有限公司电力研究院 | High-temperature superconducting magnet liquid nitrogen zero-evaporation cooling system |
| CN104034983A (en) * | 2014-06-19 | 2014-09-10 | 中国科学院电工研究所 | Multi-sample performance test system for high temperature superconducting materials |
| CN105627610A (en) * | 2016-03-15 | 2016-06-01 | 北京美尔斯通科技发展股份有限公司 | High-temperature superconductor refrigerating equipment based on fixed nitrogen |
| CN206096305U (en) * | 2016-10-11 | 2017-04-12 | 西南交通大学 | A cooling of constant temperature fixed nitrogen is equipped for high temperature superconducting materia test |
-
2016
- 2016-10-11 CN CN201610887904.XA patent/CN106526354A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06325930A (en) * | 1993-05-12 | 1994-11-25 | Kobe Steel Ltd | Cooling system of ac magnet using oxide superconducting wire |
| JPH08248001A (en) * | 1995-03-09 | 1996-09-27 | Furukawa Electric Co Ltd:The | Apparatus for measuring physical properties under magnetic field |
| JP2002252380A (en) * | 2001-02-27 | 2002-09-06 | Sumitomo Heavy Ind Ltd | Superconducting magnet device and monitoring method therefor |
| CN101130179A (en) * | 2007-10-19 | 2008-02-27 | 中国科学院电工研究所 | Conduction cooling high temperature superconducting electric-magnetic iron remover based on nitrogen fixation protection |
| CN202794074U (en) * | 2012-09-28 | 2013-03-13 | 北京鼎臣超导科技有限公司 | High temperature superconduction temperature transition measuring device based upon cryogenic refrigerator |
| CN103901254A (en) * | 2014-04-19 | 2014-07-02 | 中国船舶重工集团公司第七一二研究所 | Critical current testing device for high-temperature superconductive wire |
| CN103985499A (en) * | 2014-04-19 | 2014-08-13 | 云南电力试验研究院（集团）有限公司电力研究院 | High-temperature superconducting magnet liquid nitrogen zero-evaporation cooling system |
| CN104034983A (en) * | 2014-06-19 | 2014-09-10 | 中国科学院电工研究所 | Multi-sample performance test system for high temperature superconducting materials |
| CN105627610A (en) * | 2016-03-15 | 2016-06-01 | 北京美尔斯通科技发展股份有限公司 | High-temperature superconductor refrigerating equipment based on fixed nitrogen |
| CN206096305U (en) * | 2016-10-11 | 2017-04-12 | 西南交通大学 | A cooling of constant temperature fixed nitrogen is equipped for high temperature superconducting materia test |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111413567A (en) * | 2020-04-21 | 2020-07-14 | 清华大学 | System and method for testing current-carrying characteristics of superconducting tape |
| CN111413567B (en) * | 2020-04-21 | 2021-08-24 | 清华大学 | System and method for testing current-carrying characteristics of superconducting tape |
| CN113834234A (en) * | 2021-09-30 | 2021-12-24 | 东方电气集团科学技术研究院有限公司 | Low temperature device based on preparation of nitrogen fixation cooling medium |
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