CN108458888A - Performance testing device for low-temperature heat exchanger with temperature range below 20K - Google Patents
Performance testing device for low-temperature heat exchanger with temperature range below 20K Download PDFInfo
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- CN108458888A CN108458888A CN201810126528.1A CN201810126528A CN108458888A CN 108458888 A CN108458888 A CN 108458888A CN 201810126528 A CN201810126528 A CN 201810126528A CN 108458888 A CN108458888 A CN 108458888A
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- heat exchanger
- cryogenic heat
- warm areas
- pressure
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- 238000012360 testing method Methods 0.000 title claims abstract description 32
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000001307 helium Substances 0.000 claims abstract description 27
- 229910052734 helium Inorganic materials 0.000 claims abstract description 27
- 239000007788 liquid Substances 0.000 claims abstract description 13
- 238000005057 refrigeration Methods 0.000 claims description 41
- 150000001875 compounds Chemical class 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 7
- 239000007789 gas Substances 0.000 claims description 6
- 230000000087 stabilizing effect Effects 0.000 claims 1
- 238000013461 design Methods 0.000 abstract description 10
- 238000000034 method Methods 0.000 abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 7
- 230000007547 defect Effects 0.000 abstract 1
- 239000012530 fluid Substances 0.000 description 4
- 238000011056 performance test Methods 0.000 description 4
- 238000012546 transfer Methods 0.000 description 4
- 238000007373 indentation Methods 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000006837 decompression Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/005—Testing of complete machines, e.g. washing-machines or mobile phones
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
A performance testing device for a low-temperature heat exchanger of a temperature zone below 20K comprises a compressor, an expansion refrigerating unit, a low-temperature heat exchanger group of the temperature zone above 20K, a first low-temperature heat exchanger of the temperature zone below 20K to be tested, a second low-temperature heat exchanger of the temperature zone below 20K to be tested, a throttle valve, a liquid helium Dewar, a first flowmeter, a second flowmeter, four temperature sensors and four pressure sensors. Compared with the traditional heat exchanger performance testing method adopting water as a medium, the performance testing device for the low-temperature heat exchanger with the temperature range below 20K can directly test the performance of the low-temperature heat exchanger at the working temperature of 20K, so that the most direct flowing and heat exchange coefficients can be obtained, direct data support can be provided for the design method and technical parameters of the low-temperature heat exchanger with the temperature range below 20K, and the defects of the existing heat exchanger design software can be overcome.
Description
Technical field
The present invention relates to Cryo Equipment technical field more particularly to a kind of 20K or less warm areas cryogenic heat exchanger performance tests
Device.
Background technology
Cryogenic heat exchanger is the critical component of large-scale turbine expansion helium refrigerator/liquefier, and major function is realization pair
The utilization of reflux helium cold, improves the operational efficiency of whole system, performance can seriously affect overall performance.In helium warm area system
The operation temperature area of heat exchanger is from 300K until 4.5K, span is very big in cold, liquefier, but design at present is calculated and adopted
Calculation formula (correlation) is identical.The test of heat exchanging device performance at present generally adopts water as working medium, a side runner
For hot water, another side runner is that cold water estimates the heat exchange property of heat exchanger by measuring flow, the out temperature of hot and cold water.
This method is proved to be effective for 20K or more warm areas.After 20K temperature, at present still without direct experimental data
Prove the accuracy of design method.One of main cause is not no special 20K or less warm areas cryogenic heat exchanger low temperature item
Flowing, heat transfer testing device can be realized and be tested it under part.
Invention content
In consideration of it, it is necessary to provide a kind of 20K or less warm areas cryogenic heat exchanger performance testing devices.
A kind of 20K or less warm areas cryogenic heat exchanger performance testing device, including compressor, swell refrigeration unit, 20K or more
Warm area cryogenic heat exchanger group, the first 20K or less warm areas cryogenic heat exchanger to be measured, the second 20K or less warm areas cryogenic heat exchanger to be measured,
Throttle valve, liquid helium Dewar, first flowmeter, second flowmeter, seven temperature sensors and seven pressure sensors；
The high-pressure outlet of the compressor is connected to the high pressure entry of 20K or more the warm areas cryogenic heat exchanger group, described
The of first high-pressure outlet of 20K or more warm area cryogenic heat exchanger groups and first 20K or less the warm areas cryogenic heat exchanger to be measured
One high pressure entry is connected to, the high-pressure outlet and second 20K to be measured of first 20K or less the warm areas cryogenic heat exchanger to be measured with
The high pressure entry of lower warm area cryogenic heat exchanger is connected to, the high-pressure outlet of second 20K or less the warm areas cryogenic heat exchanger to be measured and
The entrance of the throttle valve is connected to, and the outlet of the throttle valve is connected to the entrance of the liquid helium Dewar, the liquid helium Dewar
Gas vent is connected to the low-pressure inlet of the described second 20K or less warm areas cryogenic heat exchanger to be measured, second 20K or less to be measured
The low tension outlet of warm area cryogenic heat exchanger is connected to the low-pressure inlet of the described first 20K or less warm areas cryogenic heat exchanger to be measured, institute
State the low pressure of the low tension outlet and 20K or more the warm areas cryogenic heat exchanger group of the first 20K or less warm areas cryogenic heat exchanger to be measured
Entrance is connected to, and the low tension outlet of 20K or more the warm areas cryogenic heat exchanger group is connected to the low-pressure inlet of the compressor；
The high-pressure outlet of the compressor is also connected to the entrance of the swell refrigeration unit, the swell refrigeration unit
Outlet is connected to the low-pressure inlet of the described first 20K or less warm areas cryogenic heat exchanger to be measured；
The first flowmeter is set to the high pressure entry of 20K or more the warm areas cryogenic heat exchanger group, the second flow
Entrance of the meter set on the swell refrigeration unit；
Seven temperature sensors are respectively arranged on the high indentation of the described first 20K or less warm areas cryogenic heat exchanger to be measured
Mouth, high-pressure outlet, low-pressure inlet and low tension outlet and the high of second 20K or less the warm areas cryogenic heat exchanger to be measured extrude
Mouth, low-pressure inlet and low tension outlet；
Seven pressure sensors are respectively arranged on the high indentation of the first 20K or less the warm area cryogenic heat exchangers to be measured
Mouth, high-pressure outlet, low-pressure inlet and low tension outlet and the high of second 20K or less the warm areas cryogenic heat exchanger to be measured extrude
Mouth, low-pressure inlet and low tension outlet.
In one embodiment, the swell refrigeration unit includes the one-stage expansion refrigeration machine being connected in series with and compound expansion
Refrigeration machine, the high-pressure outlet of the compressor are connected to the entrance of the one-stage expansion refrigeration machine, the one-stage expansion refrigeration machine
Outlet be connected to the entrance of the compound expansion refrigeration machine, the outlet of the compound expansion refrigeration machine and described first to be measured
The low-pressure inlet of 20K or less warm area cryogenic heat exchangers is connected to.
In one embodiment, further include pressure stability equipment, the pressure stability equipment and the compressor parallel connect
It connects.
In one embodiment, the swell refrigeration unit, 20K or more the warm areas cryogenic heat exchanger group, described first
20K or less warm areas cryogenic heat exchanger, second 20K or less the warm areas cryogenic heat exchanger to be measured and the throttle valve to be measured are set to
In ice chest.
In one embodiment, the ice chest is Vacuum cooling case.
In order to which the design method to 20K or less warm areas cryogenic heat exchanger to be measured is assessed, using above-mentioned 20K or less warm areas
Cryogenic heat exchanger performance testing device can be the first 20K or less warm areas cryogenic heat exchanger to be measured and the second 20K or less warm areas to be measured
Cryogenic heat exchanger provides the fluid environment of actual 20K or less warm areas.And then using flow, temperature, pressure measuring device, to the
Each fluid inlet and outlet parameter of one 20K or less warm areas cryogenic heat exchanger to be measured and the second 20K or less warm areas cryogenic heat exchanger to be measured
It measures, as the first 20K or less warm areas cryogenic heat exchanger to be measured and the second 20K or less warm areas cryogenic heat exchanger assessment to be measured
Foundation.
Above-mentioned 20K or less warm areas cryogenic heat exchanger performance testing device, with traditional heat exchanger for adopting water as medium
Can test method compare, above-mentioned 20K or less warm areas cryogenic heat exchanger performance testing device can directly under 20K operating temperatures into
The performance test of row cryogenic heat exchanger can be cryogenic heat exchanger under the warm area to obtain most direct flowing, the coefficient of heat transfer
Design method and technical parameter provide immediate data and support, to fill up the deficiency of plate-fin heat exchanger design software.
Description of the drawings
Fig. 1 is the structural schematic diagram of 20K or less the warm area cryogenic heat exchanger performance testing devices of an embodiment.
Specific implementation mode
In order to make the objectives, technical solutions, and advantages of the present invention be more clear, with reference to the accompanying drawings and embodiments, to this hair
It is bright to be further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and do not have to
It is of the invention in limiting.
As shown in Figure 1,20K or less the warm area cryogenic heat exchangers performance testing device 100 of an embodiment, including compressor
10,20K or more warm areas cryogenic heat exchanger group 20, the first 20K or less warm areas cryogenic heat exchanger 30 to be measured, the second 20K or less to be measured
Warm area cryogenic heat exchanger 35, throttle valve 40, liquid helium Dewar 50, swell refrigeration unit, first flowmeter 72, second flowmeter 74,
Seven temperature sensors and seven pressure sensors.The high-pressure outlet and 20K or more warm area cryogenic heat exchangers group 20 of compressor 10
High pressure entry connection, the first high-pressure outlet of 20K or more warm area cryogenic heat exchangers group 20 and the first 20K or less warm areas to be measured are low
First high pressure entry of warm heat exchanger 30 is connected to, the high-pressure outlet and second of the first 20K or less warm areas cryogenic heat exchanger 30 to be measured
The high pressure entry of 20K or less warm areas cryogenic heat exchanger 35 to be measured is connected to, the height of the second 20K or less warm areas cryogenic heat exchanger 35 to be measured
It extrudes mouth to be connected to the entrance of throttle valve 40, the outlet of throttle valve 40 is connected to the entrance of liquid helium Dewar 50, liquid helium Dewar 50
The low-pressure inlet of gas vent and the second 20K or less warm areas cryogenic heat exchanger 35 to be measured is connected to, and the second 20K or less warm areas to be measured are low
The low-pressure inlet of the low tension outlet of warm heat exchanger 35 and the first 20K or less warm areas cryogenic heat exchanger 30 to be measured is connected to, and first is to be measured
The low tension outlet of 20K or less warm areas cryogenic heat exchanger 30 is connected to the low-pressure inlet of 20K or more warm area cryogenic heat exchangers group 20,
The low tension outlet of 20K or more warm area cryogenic heat exchangers group 20 is connected to the low-pressure inlet of compressor 10.
The high-pressure outlet of compressor 10 is also connected to the entrance of swell refrigeration unit, the outlet of swell refrigeration unit and first
The low-pressure inlet of 20K or less warm areas cryogenic heat exchanger 30 to be measured is connected to.The high-pressure helium of the high-pressure outlet outflow of compressor 10, one
Part enter 20K or more warm area cryogenic heat exchangers group 20, a part enter swell refrigeration unit, the outlet of swell refrigeration unit with
2nd 20K or less warm area cryogenic heat exchangers group, 35 low tension outlet fluid is connected to the first 20K or less warm area low-temperature heat exchanges after converging
The low-pressure inlet of device group 30.
In embodiment as shown in Figure 1, swell refrigeration unit includes 62 He of one-stage expansion refrigeration machine being connected in series with
Compound expansion refrigeration machine 64.The high-pressure outlet of compressor 10 is connected to the entrance of one-stage expansion refrigeration machine 62, one-stage expansion refrigeration
The outlet of machine 62 is connected to the entrance of compound expansion refrigeration machine 64, the outlet of compound expansion refrigeration machine 64 and the first 20K to be measured with
The low-pressure inlet of lower warm area cryogenic heat exchanger 30 is connected to.
First flowmeter 72 is set to the high pressure entry of 20K or more warm area cryogenic heat exchangers group 20, and second flowmeter 74 is set to
The entrance of swell refrigeration unit.
Seven temperature sensors be respectively arranged on the first 20K or less warm areas cryogenic heat exchanger 30 to be measured the first high pressure entry,
The high-pressure outlet of high-pressure outlet, low-pressure inlet and low tension outlet and the second 20K or less warm areas cryogenic heat exchanger 35 to be measured, low pressure
Entrance and low tension outlet.
Seven pressure sensors be respectively arranged on the first 20K or less warm areas cryogenic heat exchanger 30 to be measured the first high pressure entry,
The high-pressure outlet of high-pressure outlet, low-pressure inlet and low tension outlet and the second 20K or less warm areas cryogenic heat exchanger 35 to be measured, low pressure
Entrance and low tension outlet.
Above-mentioned 20K or less warm areas cryogenic heat exchanger performance testing device 100 further includes pressure stability equipment 90, pressure stability
Equipment 90 and compressor 10 are connected in parallel.The height pressure pressure of the test device 100 can be stablized using pressure stability equipment 90.
Above-mentioned 20K or less warm areas cryogenic heat exchanger performance testing device 100, swell refrigeration unit, 20K or more warm area low temperature
Heat exchanger group 20, the first 20K or less warm areas cryogenic heat exchanger 30 to be measured, the second 35 and of 20K or less warm areas cryogenic heat exchanger to be measured
Throttle valve 40 is low-temperature components, is set in ice chest 95, to reduce leakage heat.Ice chest 95 is Vacuum cooling case.Further, vacuum
It is wrapped up using vacuum multilayer insulation in the outside of ice chest.
Above-mentioned 20K or less warm areas cryogenic heat exchanger performance testing device 100, compressor 10 supplies high pressure by pressure duct
Room temperature helium, a high normal pressure and temperature helium part utilize high pressure gas by one-stage expansion refrigeration machine 62 and compound expansion refrigeration machine 64
Expansion decompression generates enthalpy drop, obtains refrigerating capacity, and the helium after refrigeration flows into the first 20K or less warm areas cryogenic heat exchanger 30 to be measured
Low-pressure inlet.Another part of high normal pressure and temperature helium is refluxed cold helium gas cooling by 20K or more warm area cryogenic heat exchangers group 20.
Then, cold helium sequentially enters the first 30 and second 20K or less warm areas low temperature to be measured of 20K or less warm areas cryogenic heat exchanger to be measured and changes
Hot device 35 continues to be refluxed cold helium gas cooling, passes through the throttling of throttle valve 40 later and generates the saturation liquid-vapor mixture of helium, and enters
Liquid helium Dewar 50, for liquid helium there are in liquid helium Dewar 50, the gas helium of generation gradually enters the second 20K to be measured along low pressure line
Following warm area cryogenic heat exchanger 35, the first 20K or less warm areas cryogenic heat exchanger 30 and 20K or more warm area cryogenic heat exchanger group to be measured
20 by rewarming, finally flows back to the low-pressure inlet of compressor 10, so far completes cycle.
In order to the first 30 and second 20K or less warm areas cryogenic heat exchanger to be measured of 20K or less warm areas cryogenic heat exchanger to be measured
30 heat transfer, mobile performance are analyzed, and first flowmeter 72 are arranged in the entrance of ice chest 95, in one-stage expansion refrigeration machine 62
Inlet arrange second flowmeter 74, this two flowmeters be respectively used to measure into Vacuum cooling case 95 total amount of helium
U1, and enter the amount of helium U2 of the first expansion refrigerator 72.In the high pressure of the first 20K or less warm areas cryogenic heat exchanger 30 to be measured
Entrance arranges T1 thermometers 81, and P1 pressure gauges 82 arrange T2 thermometers 83, P2 pressure gauges 84, at it in its high-pressure outlet
Low pressure inlet arranges T3 thermometers 85, and P3 pressure gauges 86 arrange T4 thermometers 87, P4 pressure gauges 88 in its low tension outlet.
Wherein, the difference of U1 and U2, U1, T1, P1, T3, P3 will be used as input quantity to substitute into design of heat exchanger software and carry out calculation and check, institute
It the high-pressure outlet of the first obtained 20K or less warm areas cryogenic heat exchanger 30 to be measured and the temperature of low tension outlet, pressure and measures
The T2 arrived, P2, T4, P4 comparison, analytical error value, as the criterion of design method accuracy and the foundation of modified coefficient.
T5 thermometers 91 are arranged in the high-pressure outlet of the second 20K or less warm areas cryogenic heat exchanger 35 to be measured, P5 pressure gauges 92 are low at its
Indentation mouth arranges T6 thermometers 93, and P6 pressure gauges 94 arrange T7 thermometers 96, P7 pressure gauges 97 in its low tension outlet.Its
In, the difference of U1 and U2, T2, P2, T6, P6 will be used as input quantity to substitute into design of heat exchanger software and carry out calculation and check, acquired
Temperature, pressure and the measurement of high-pressure outlet and low tension outlet of second 20K or less the warm areas cryogenic heat exchanger 35 to be measured obtain
T5, P5, T7, P7 are compared, analytical error value, as the criterion of design method accuracy and the foundation of modified coefficient.
Above-mentioned 20K or less warm areas cryogenic heat exchanger performance testing device 100, the first 20K or less warm areas low-temperature heat exchange to be measured
Device 30 and the second 20K or less warm areas cryogenic heat exchanger 35 to be measured are both element under test and for realizing the elements of cooling flow,
Entire test device 100 can be that the first 30 and second 20K or less warm areas low temperature to be measured of 20K or less warm areas cryogenic heat exchanger to be measured changes
Hot device 35 provides the fluid test environment of actual 20K or less warm areas.Under this warm area test heat exchanger performance be it is current its
Not available for his test device.
Above-mentioned 20K or less warm areas cryogenic heat exchanger performance testing device 100, with traditional heat exchanger for adopting water as medium
Performance test methods compare, and above-mentioned 20K or less warm areas cryogenic heat exchanger performance testing device 100 can directly work in 20K warm
The performance test of the lower carry out cryogenic heat exchanger of degree can be that low temperature changes under the warm area to obtain most direct flowing, the coefficient of heat transfer
The design method and technical parameter of hot device provide immediate data and support, to fill up the deficiency of business software design.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
Member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications also should be regarded as
Protection scope of the present invention.
Claims (5)
1. a kind of 20K or less warm areas cryogenic heat exchanger performance testing device, which is characterized in that including compressor, expansion refrigerator
Group, 20K or more warm area cryogenic heat exchangers group, the first 20K or less warm areas cryogenic heat exchanger to be measured, the second 20K or less warm areas to be measured
Cryogenic heat exchanger, throttle valve, liquid helium Dewar, first flowmeter, second flowmeter, seven temperature sensors and seven pressure sensings
Device；
The high-pressure outlet of the compressor is connected to the high pressure entry of 20K or more the warm areas cryogenic heat exchanger group, the 20K with
First high pressure of the first high-pressure outlet of upper warm area cryogenic heat exchanger group and first 20K or less the warm areas cryogenic heat exchanger to be measured
Entrance is connected to, the high-pressure outlet of first 20K or less the warm areas cryogenic heat exchanger to be measured and second 20K or less the warm areas to be measured
The high pressure entry of cryogenic heat exchanger is connected to, the high-pressure outlet and the section of second 20K or less the warm areas cryogenic heat exchanger to be measured
The entrance connection of valve is flowed, the outlet of the throttle valve is connected to the entrance of the liquid helium Dewar, and the gas of the liquid helium Dewar goes out
Mouth is connected to the low-pressure inlet of the described second 20K or less warm areas cryogenic heat exchanger to be measured, and second 20K or less the warm areas to be measured are low
The low tension outlet of warm heat exchanger is connected to the low-pressure inlet of the described first 20K or less warm areas cryogenic heat exchanger to be measured, and described first
The low tension outlet of 20K or less warm areas cryogenic heat exchanger to be measured and the low-pressure inlet of 20K or more the warm areas cryogenic heat exchanger group connect
Logical, the low tension outlet of 20K or more the warm areas cryogenic heat exchanger group is connected to the low-pressure inlet of the compressor；
The high-pressure outlet of the compressor is also connected to the entrance of the swell refrigeration unit, the outlet of the swell refrigeration unit
It is connected to the low-pressure inlet of the described first 20K or less warm areas cryogenic heat exchanger to be measured；
The first flowmeter is set to the high pressure entry of 20K or more the warm areas cryogenic heat exchanger group, and the second flowmeter is set
In the entrance of the swell refrigeration unit；
Seven temperature sensors are respectively arranged on high pressure entry, the height of the described first 20K or less warm areas cryogenic heat exchanger to be measured
Extrude mouth, low-pressure inlet and the high-pressure outlet of low tension outlet and second 20K or less the warm areas cryogenic heat exchanger to be measured, low pressure
Entrance and low tension outlet；
Seven pressure sensors are respectively arranged on high pressure entry, the height of the first 20K or less the warm area cryogenic heat exchangers to be measured
Extrude mouth, low-pressure inlet and the high-pressure outlet of low tension outlet and second 20K or less the warm areas cryogenic heat exchanger to be measured, low pressure
Entrance and low tension outlet.
2. 20K or less warm areas cryogenic heat exchanger performance testing device as described in claim 1, which is characterized in that the expansion
Refrigeration unit includes the one-stage expansion refrigeration machine being connected in series with and compound expansion refrigeration machine, the high-pressure outlet of the compressor and institute
State the entrance connection of one-stage expansion refrigeration machine, the outlet of the one-stage expansion refrigeration machine and the entrance of the compound expansion refrigeration machine
Connection, the outlet of the compound expansion refrigeration machine and the low-pressure inlet of the described first 20K or less warm areas cryogenic heat exchanger to be measured connect
It is logical.
3. 20K or less warm areas cryogenic heat exchanger performance testing device as described in claim 1, which is characterized in that further include pressure
Power stabilizing equipment, the pressure stability equipment are connected with the compressor parallel.
4. 20K or less warm areas cryogenic heat exchanger performance testing device as described in claim 1, which is characterized in that the expansion
Refrigeration unit, 20K or more the warm areas cryogenic heat exchanger group, first 20K or less the warm areas cryogenic heat exchanger to be measured, described
Two 20K or less warm areas cryogenic heat exchangers to be measured and the throttle valve are set in ice chest.
5. 20K or less warm areas cryogenic heat exchanger performance testing device as claimed in claim 4, which is characterized in that the ice chest
For Vacuum cooling case.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810126528.1A CN108458888B (en) | 2018-02-07 | 2018-02-07 | Performance testing device for low-temperature heat exchanger with temperature range below K |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810126528.1A CN108458888B (en) | 2018-02-07 | 2018-02-07 | Performance testing device for low-temperature heat exchanger with temperature range below K |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108458888A true CN108458888A (en) | 2018-08-28 |
| CN108458888B CN108458888B (en) | 2020-01-31 |
Family
ID=63238703
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810126528.1A Active CN108458888B (en) | 2018-02-07 | 2018-02-07 | Performance testing device for low-temperature heat exchanger with temperature range below K |
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| Country | Link |
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| CN (1) | CN108458888B (en) |
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| CN110261150A (en) * | 2019-06-04 | 2019-09-20 | 中国科学院合肥物质科学研究院 | A kind of test device of 300-4.5K warm area multi-state cryogenic heat exchanger |
| CN113607246A (en) * | 2021-07-30 | 2021-11-05 | 中国科学院合肥物质科学研究院 | Calibration device and method for low-temperature flowmeter |
| CN114838970A (en) * | 2022-05-19 | 2022-08-02 | 华中科技大学 | Performance measuring device for open type conical microstructure JT refrigerator |
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| CN114838970A (en) * | 2022-05-19 | 2022-08-02 | 华中科技大学 | Performance measuring device for open type conical microstructure JT refrigerator |
| CN114838970B (en) * | 2022-05-19 | 2023-02-10 | 华中科技大学 | Performance measuring device for open type JT refrigerator with conical microstructure |
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| Publication number | Publication date |
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| CN108458888B (en) | 2020-01-31 |
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