CN107255652A - The heat exchanger performance testing device tested under low temperature in the range of large Reynold number - Google Patents
The heat exchanger performance testing device tested under low temperature in the range of large Reynold number Download PDFInfo
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- CN107255652A CN107255652A CN201710407482.6A CN201710407482A CN107255652A CN 107255652 A CN107255652 A CN 107255652A CN 201710407482 A CN201710407482 A CN 201710407482A CN 107255652 A CN107255652 A CN 107255652A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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- G01M99/002—Thermal testing
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- 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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Abstract
The invention discloses the heat exchanger performance testing device tested under a kind of low temperature in the range of large Reynold number, include compressor, Flow-rate adjustment and distribution system, helium gas cooling temperature descending section, fin core test section and measurement and acquisition system.The present invention is measured using the Flow-rate adjustment mode of three kinds of levels by two mass flow controller parallel connections, and Reynolds number measuring accuracy is high and measurement range is big；Wrap up and be placed in this two sets of plan of the environment of high vacuum multiple layer heat insulation using heat-insulating plate to reduce thermal balance error, heat transfer factor measuring accuracy is high；Temperature, pressure, flow and performance number in test process in dynamic real-time measurement fin core test module, and the real-time Numerical heat transfer factor, friction factor in a computer, it is convenient to be compared with existing conclusion；Set temperature alarming to monitor in control panel, ensure experiment operation safely, effectively.
Description
Technical field
The present invention relates to cryogenic heat exchanger technical field, the heat exchange tested under specifically a kind of low temperature in the range of large Reynold number
Device performance test apparatus.
Background technology
Cryogenic heat exchanger as Cryo Equipment chief component, be widely used in refrigeration, gas liquefaction and
In the fields such as separation, cryogenic engineering, it conducts heat and mobile performance directly influences the economy of Cryo Equipment, compactedness and safety
Property.For example, plate-fin heat exchanger is because of about 10 times of shell-and-tube heat exchangers of its heat transfer area per unit volume, therefore it is widely applied in helium
In refrigeration machine/helium liquefier.And for the ease of engineering design and application, heat exchanging device fin unit is conducted heat and mobile performance
Measure is a set of effective scheme.
At present, flat shape, zigzag, the punching type introduced by day Benshen's steel are continued to use domestic many factories and designing unit more
Fin performance curve data.But in cryogenic system application, due to production and processing precision, the property of different shape parameter fin
The difference that energy and different circulation mediums are produced, existing fin performance data still needs to fully be considered.Traditional heat exchanger
Using air, vapor, water, conduction oil etc. as circulation medium more than test platform, and medium for cryogen experiment then compared with
To be rare, especially for the helium under low temperature, not yet with reliable performance test data.In addition, traditional steady state test is more
Side thermal resistance is separated so as to obtain the coefficient of heat transfer at end to be measured using partition method, this method can be introduced in addition in results of property
The calculation error that side thermal resistance and partition method are produced.
The content of the invention
In order to overcome the limitation of above-mentioned prior art, it is an object of the invention to provide test large Reynold number under a kind of low temperature
In the range of heat exchanger performance testing device, the present invention passes through two mass flows using the Flow-rate adjustment mode of three kinds of levels
Controller parallel connection is measured, so as to reduce the error of Reynolds number test, and is wrapped up using heat-insulating plate and to be placed in high vacuum more
Adiabatic this two sets of plan of environment of layer reduces thermal balance error, and high with measuring accuracy, measurement range is big, and economical and effective etc. is excellent
Point.
Technical scheme is as follows：
Under a kind of low temperature test large Reynold number in the range of heat exchanger performance testing device, include compressor, Flow-rate adjustment and
Distribution system, helium gas cooling temperature descending section, fin core test section and measurement and acquisition system, it is characterised in that：Described flow
Main road of two tunnels with bellows regulating valve that regulation and distribution system include the bypass with choke valve all the way and be in parallel, it is described
Two road main roads in be connected to the mass flow controller with different measurement ranges；
Described helium gas cooling temperature descending section includes liquid nitrogen source, be connected with liquid nitrogen source liquid nitrogen pipeline and successively with liquid nitrogen pipeline
Two grades of plate-fin heat exchangers of heat exchange are carried out, the port of export of the liquid nitrogen pipeline is connected with rewarming device, flowmeter and tune in turn
Save valve；
Described fin core test section includes fin core, two pieces of electric heating sheets, two pieces of soaking plates, heat-insulating plate, power
Instrument, two pressure sensors, two the first temperature sensors and multiple second temperature sensors；Described two pieces of electric heating sheets and
Two pieces of soaking plates are respectively placed in the two end faces of the fin core, and described two pressure sensors and two the first temperature are passed
Sensor is separately mounted to the two ends of the fin core, measures the pressure and temperature of fin core entrance end, described two pieces
Multiple thermometer holes are respectively equipped with soaking plate, described multiple second temperature sensors are corresponded to respectively is arranged on the multiple thermometric
Kong Zhong, described heat-insulating plate wraps the fin core, two pieces of electric heating sheets and two pieces of soaking plates；Two blocks of described electricity
Heating plate is electrically connected with the power instrument respectively, and the input power of two pieces of electric heating sheets is tested and recorded by power instrument；
The entrance point of the main road of two tunnels with bellows regulating valve is connected with the port of export of the compressor, two roads band ripple
The port of export of the main road of pipe regulating valve carried out successively with described two grades of plate-fin heat exchangers after heat exchange with the fin core
The entrance point of test section is connected, and the port of export of the fin core test section is connected with the entrance point of the compressor；Institute
The bypass with choke valve all the way stated is connected between the import and export end of the compressor；
Described measurement and acquisition system includes data acquisition unit and computer, the mass flow controller, flowmeter, work(
Rate instrument, two pressure sensors, the output signal of two the first temperature sensors and multiple second temperature sensors are by described
Data acquisition unit be acquired and be delivered to described computer and carry out processing and show.
The heat exchanger performance testing device tested in a low temperature of described in the range of large Reynold number, it is characterised in that：Described
Helium gas cooling temperature descending section, fin core test section are placed in the ice chest of high vacuum multiple layer heat insulation.
The heat exchanger performance testing device tested in a low temperature of described in the range of large Reynold number, it is characterised in that：Described
Fin core test section is compressed and fixed using four pieces of c-type clamp.
The heat exchanger performance testing device tested in a low temperature of described in the range of large Reynold number, it is characterised in that：It is described exhausted
The periphery of hot sheet is enclosed with aluminium foil.
The heat exchanger performance testing device tested in a low temperature of described in the range of large Reynold number, it is characterised in that：Described
Mass flow controller, flowmeter, power instrument, two pressure sensors, two the first temperature sensors and multiple second temperatures
Sensor is connected by lead with the capture card of the data acquisition unit, and described computer, can as signal output terminal
To carry out collection in worksite processing display.
The heat exchanger performance testing device tested in a low temperature of described in the range of large Reynold number, it is characterised in that：The wing
Temperature sensor TIC101 is installed in the pipeline of the entrance of label body test section, the entrance temperature of fin core test section is measured
Degree, temperature sensor TIC101 is provided with level Four temperature alarming by control panel, respectively high full level alarm, full level alarm,
Low alarm and low low alarm.
The heat exchanger performance testing device tested in a low temperature of described in the range of large Reynold number, it is characterised in that：It is described cold
The exit of case is provided with temperature sensor TIC106, measures ice chest exit fluid temperature, and temperature sensor TIC106 passes through control
Panel processed is provided with low alarm.
Compressor keeps normal full load operation, carries out big flow regulation by the choke valve of bypass, is adjusted using opening and closing
The bellows regulating valve of different bores in two road main roads carries out setting two quality in intermediate flow regulation, the road main roads of Er bis-
Flow controller, carries out low discharge regulation by own needle valve assembly and measures.
Beneficial effects of the present invention：
The present invention is measured, Reynolds using the Flow-rate adjustment mode of three kinds of levels by two mass flow controller parallel connections
Number measuring accuracy is high and measurement range is big；The environment of high vacuum multiple layer heat insulation this two sets of plan is wrapped up and is placed in using heat-insulating plate
To reduce thermal balance error, heat transfer factor measuring accuracy is high；In test process in dynamic real-time measurement fin core test module
Temperature, pressure, flow and performance number, and the real-time Numerical heat transfer factor, friction factor in a computer be convenient with existing conclusion
It is compared；Set temperature alarming to monitor in control panel, ensure experiment operation safely, effectively.
Brief description of the drawings
Fig. 1 is schematic structural view of the invention.
Fig. 2 is the structural representation of fin core test section in the present invention.
Embodiment
Referring to Fig. 1,2, the heat exchanger performance testing device tested under a kind of low temperature in the range of large Reynold number includes compression
Machine 1, Flow-rate adjustment and distribution system, helium gas cooling temperature descending section, fin core test section and measurement and acquisition system, Flow-rate adjustment
And distribution system includes the main road of the bypass all the way with choke valve 2 and two tunnels being in parallel with bellows regulating valve 3,4, two tunnels
The mass flow controller 5,6 with different measurement ranges is connected in main road；
Helium gas cooling temperature descending section includes liquid nitrogen source 13, the liquid nitrogen pipeline being connected with liquid nitrogen source 13 and entered successively with liquid nitrogen pipeline
Two grades of plate-fin heat exchangers 7,8 of row heat exchange, the port of export of liquid nitrogen pipeline is connected with rewarming device 15, flowmeter 16 in turn and adjusted
Save valve 17；
Fin core test section 9 includes fin core 9-1, two pieces of electric heating sheets 9-2, two pieces of soaking plate 9-3, heat-insulating plate 9-
4th, power instrument 9-7, two pressure sensors and two the first temperature sensor 9-5, and eight second temperature sensor 9-6；
Two pieces of electric heating sheets 9-2 and two pieces of soaking plate 9-3 are respectively placed in fin core 9-1 two end faces, two pressure sensors and
Two the first temperature sensor 9-5 are separately mounted to fin core 9-1 two ends, measure the pressure of fin core 9-1 entrance ends
Eight thermometer holes are respectively equipped with power and temperature, two pieces of soaking plate 9-3, eight second temperature sensor 9-6 are corresponded to install respectively
In eight thermometer holes, heat-insulating plate 9-4 wraps fin core 9-1, two pieces of electric heating sheets 9-2 and two pieces of soaking plate 9-3；
Two pieces of electric heating sheets 9-2 are electrically connected with power instrument 9-7 respectively, are tested by power instrument 9-7 and are recorded two pieces of electric heating sheets 9-2's
Input power；
The entrance point of main road of two tunnels with bellows regulating valve 3,4 is connected with the port of export of compressor 1, and two roads band bellows is adjusted
Save the main road of valve 3,4 the port of export carried out successively with two grades of plate-fin heat exchangers 7,8 after heat exchanges with fin core test section 9
Entrance point is connected, and the port of export of fin core test section 9 is connected with the entrance point of compressor 1；Side all the way with choke valve 2
Road is connected between the import and export end of compressor 1；
Measurement and acquisition system include data acquisition unit 18 and computer 19, mass flow controller 5,6, flowmeter 16, work(
Rate instrument 9-7, two pressure sensors and two the first temperature sensor 9-5, and eight second temperature sensor 9-6 output
Signal is acquired by data acquisition unit 18 and is delivered to the progress processing of computer 19 and shows.
In the present invention, helium gas cooling temperature descending section, fin core test section 9 are placed in eight layers of adiabatic ice chest of high vacuum.
Fin core test section 9 is compressed and fixed using four pieces of c-type clamp.
The periphery of heat-insulating plate is enclosed with aluminium foil.
Mass flow controller 5,6, flowmeter 16, power instrument 9-7, two pressure sensors and two the first TEMPs
Device 9-5, and eight second temperature sensor 9-6 are connected by lead with the capture card of data acquisition unit 18, computer 19
As signal output terminal, collection in worksite processing display can be carried out.
Temperature sensor TIC101, measurement fin core test are installed in the pipeline of the entrance of fin core test section 9
The inlet temperature of section 9, temperature sensor TIC101 is provided with level Four temperature alarming by control panel, is respectively high high-order report
Police, full level alarm, low alarm and low low alarm.
The exit of ice chest is provided with temperature sensor TIC106, measures ice chest exit fluid temperature, temperature sensor
TIC106 is provided with low alarm by control panel.
The present invention operation principle be：
Helium is after the compressor 1 under rated power operation compresses, into except oil filtration system.Helium according to needed for experiment
Flow, is bypassed by 2 pairs of superfluous gases of choke valve, is allowed to return to compressor 1 or gas holder is reclaimed.Adjusted using opening and closing
The bellows regulating valve 3,4 for saving different bores carries out setting two quality streams respectively in intermediate flow regulation, the road main roads of Er bis-
Amount controller 5,6, carries out low discharge regulation by own needle valve assembly and measures.According to plate fin heat-exchanging in cryogenic system
Helium gas flow in the common working range of device, two road main roads is changed in 36g/s, corresponding fin core from 0.83g/s
Reynolds number changes to 12000 from 400.
Fin core test section 9 is by fin core 9-1, two pieces of electric heating sheets 9-2, two pieces of soaking plate 9-3 and heat-insulating shield
The stacked structure of material 9-3 compositions, periphery parcel aluminium foil, and together it is placed in eight layers of high vacuum with two grades of plate-fin heat exchangers 7,8
In adiabatic ice chest.Using ten platinum resistance temperature sensors（Passed including two the first temperature sensors and eight second temperatures
Sensor）Measure the temperature of helium entrance end, the wall surface temperature on two pieces of soaking plate 9-3；Measured using two pressure sensors
The pressure of helium entrance end；Two pieces of electric heating sheets 9-2 input power is measured using electrical power instrument 9-7.Will in experimentation
The low-temperature helium of certain flow is passed through fin core 9-1, is heated, is imported and exported according to helium using two pieces of electric heating sheets 9-2
The change of temperature, pressure, Numerical heat transfer pressure drop performance, and examined according to the result that changes with fluid enthalpy of input power is compared
The heat-insulating property of device.
Pressure, temperature, power and flow signal are gathered by data acquisition unit 18 in real time, temperature passed in control panel
Setting level Four temperature alarming at sensor TIC101, respectively high full level alarm, full level alarm, low alarm and low low alarm,
Low alarm is set at temperature sensor TIC106, so as to ensure experiment safety, effectively operation.Adopt at the scene of progress of computer 19
Collection processing, and heat transfer factor, friction factor and Reynolds number are calculated, so that the performance for obtaining two grades of plate-fin heat exchangers 7,8 is bent
Line.
Although the embodiment to the present invention is described in detail and illustrated by example above, it should refer to
Bright, those skilled in the art can make various changes and modifications to above-mentioned embodiment, but these are without departure from this
Scope described in the spirit and claim of invention.
Claims (7)
1. the heat exchanger performance testing device tested under a kind of low temperature in the range of large Reynold number, includes compressor, Flow-rate adjustment
And distribution system, helium gas cooling temperature descending section, fin core test section and measurement and acquisition system, it is characterised in that：Described stream
Main road of two tunnels with bellows regulating valve that amount regulation and distribution system include the bypass with choke valve all the way and be in parallel, institute
The mass flow controller with different measurement ranges is connected in the road main roads of Shu bis-；
Described helium gas cooling temperature descending section includes liquid nitrogen source, be connected with liquid nitrogen source liquid nitrogen pipeline and successively with liquid nitrogen pipeline
Two grades of plate-fin heat exchangers of heat exchange are carried out, the port of export of the liquid nitrogen pipeline is connected with rewarming device, flowmeter and tune in turn
Save valve；
Described fin core test section includes fin core, two pieces of electric heating sheets, two pieces of soaking plates, heat-insulating plate, power
Instrument, two pressure sensors, two the first temperature sensors and multiple second temperature sensors；Described two pieces of electric heating sheets and
Two pieces of soaking plates are respectively placed in the two end faces of the fin core, and described two pressure sensors and two the first temperature are passed
Sensor is separately mounted to be respectively equipped with multiple thermometer holes in the two ends of the fin core, two pieces of described soaking plates, described
Multiple second temperature sensors correspond to be arranged in the multiple thermometer hole respectively, and described heat-insulating plate is by the fin core
Body, two pieces of electric heating sheets and two pieces of soaking plates are wrapped；Two pieces of described electric heating sheets are electrically connected with the power instrument respectively；
The entrance point of the main road of two tunnels with bellows regulating valve is connected with the port of export of the compressor, two roads band ripple
The port of export of the main road of pipe regulating valve carried out successively with described two grades of plate-fin heat exchangers after heat exchange with the fin core
The entrance point of test section is connected, and the port of export of the fin core test section is connected with the entrance point of the compressor；Institute
The bypass with choke valve all the way stated is connected between the import and export end of the compressor；
Described measurement and acquisition system includes data acquisition unit and computer, the mass flow controller, flowmeter, work(
Rate instrument, two pressure sensors, the output signal of two the first temperature sensors and multiple second temperature sensors are by described
Data acquisition unit be acquired and be delivered to described computer and carry out processing and show.
2. the heat exchanger performance testing device tested under low temperature according to claim 1 in the range of large Reynold number, its feature
It is：Described helium gas cooling temperature descending section, fin core test section are placed in the ice chest of high vacuum multiple layer heat insulation.
3. the heat exchanger performance testing device tested under low temperature according to claim 1 in the range of large Reynold number, its feature
It is：Described fin core test section is compressed and fixed using four pieces of c-type clamp.
4. the heat exchanger performance testing device tested under low temperature according to claim 1 in the range of large Reynold number, its feature
It is：The periphery of the heat-insulating plate is enclosed with aluminium foil.
5. the heat exchanger performance testing device tested under low temperature according to claim 1 in the range of large Reynold number, its feature
It is：Described mass flow controller, flowmeter, power instrument, two pressure sensors, two the first temperature sensors and many
Individual second temperature sensor is connected by lead with the capture card of the data acquisition unit, and described computer is defeated as signal
Go out terminal, collection in worksite processing display can be carried out.
6. the heat exchanger performance testing device tested under low temperature according to claim 1 in the range of large Reynold number, its feature
It is：Temperature sensor TIC101, measurement fin core test are installed in the pipeline of the entrance of the fin core test section
The inlet temperature of section, temperature sensor TIC101 is provided with level Four temperature alarming by control panel, respectively high full level alarm,
Full level alarm, low alarm and low low alarm.
7. the heat exchanger performance testing device tested under low temperature according to claim 2 in the range of large Reynold number, its feature
It is：The exit of the ice chest is provided with temperature sensor TIC106, measures ice chest exit fluid temperature, temperature sensor
TIC106 is provided with low alarm by control panel.
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| CN201710407482.6A CN107255652B (en) | 2017-06-02 | 2017-06-02 | Heat exchanger performance test device for testing large Reynolds number range at low temperature |
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| CN201710407482.6A CN107255652B (en) | 2017-06-02 | 2017-06-02 | Heat exchanger performance test device for testing large Reynolds number range at low temperature |
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| CN107255652B CN107255652B (en) | 2020-06-23 |
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Cited By (6)
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| CN108458888A (en) * | 2018-02-07 | 2018-08-28 | 中国科学院理化技术研究所 | A kind of 20K or less warm areas cryogenic heat exchanger performance testing device |
| CN108760319A (en) * | 2018-04-23 | 2018-11-06 | 无锡鑫盛换热器科技股份有限公司 | adjustable flow heat exchanger |
| CN108956687A (en) * | 2018-09-07 | 2018-12-07 | 南京工业大学 | Digitlization heat transfer comprehensive experimental device and method |
| 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 |
| CN111610042A (en) * | 2020-04-21 | 2020-09-01 | 合肥通用机械研究院有限公司 | Performance test system of high-parameter monatomic working medium equipment |
| CN114935464A (en) * | 2022-04-25 | 2022-08-23 | 厦门大学 | Radiator experimental device for deep low temperature and cross-scale |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108458888A (en) * | 2018-02-07 | 2018-08-28 | 中国科学院理化技术研究所 | A kind of 20K or less warm areas cryogenic heat exchanger performance testing device |
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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 |
| CN111610042A (en) * | 2020-04-21 | 2020-09-01 | 合肥通用机械研究院有限公司 | Performance test system of high-parameter monatomic working medium equipment |
| CN114935464A (en) * | 2022-04-25 | 2022-08-23 | 厦门大学 | Radiator experimental device for deep low temperature and cross-scale |
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| CN107255652B (en) | 2020-06-23 |
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