CN110044647A - A kind of supercritical carbon dioxide printed circuit board performance testing device of heat exchanger - Google Patents
A kind of supercritical carbon dioxide printed circuit board performance testing device of heat exchanger Download PDFInfo
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- CN110044647A CN110044647A CN201910328903.5A CN201910328903A CN110044647A CN 110044647 A CN110044647 A CN 110044647A CN 201910328903 A CN201910328903 A CN 201910328903A CN 110044647 A CN110044647 A CN 110044647A
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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
- G01M99/002—Thermal testing
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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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Abstract
The invention discloses a kind of supercritical carbon dioxide printed circuit board performance testing device of heat exchanger, the experimental provision can realize that the cold and hot circuit for supercritical carbon dioxide printed circuit board heat exchanger to be measured is respectively supplied to determine the supercritical carbon dioxide fluid of temperature and pressure, temperature, pressure and the mass flow of cold and hot loop fluid can be adjusted according to experiment condition point, and CO 2 fluid medium can be recycled.Fluid flow, inlet pressure, inlet temperature, the outlet pressure, outlet temperature experimental data in the cold and hot circuit of heat exchanger can be tested, record and be monitored in real time to the device.The precision of experimental provision test is high, the reliability and repeatability of test are strong, solve the problem of that the device and method lacked in the prior art for measuring the flowing of supercritical carbon dioxide fluid printed circuit board heat exchanger and heat exchange property lacks the device and method that can be directly used for college teaching and experimental study.
Description
Technical field
The present invention relates to supercritical carbon dioxide printed circuit board heat exchangers, and in particular to a kind of supercritical carbon dioxide
Printed circuit board performance testing device of heat exchanger.
Background technique
It is more than the one of its critical point (7.38Mpa, 304.13K) that supercritical carbon dioxide (SCO2), which refers to pressure and temperature,
The existing forms of kind carbon dioxide.In Near The Critical Point, CO 2 fluid have that viscosity is low, the compressed coefficient is low, density is high and
The big equal many advantages of thermal capacity, therefore supercritical carbon dioxide is considered as one of ideal power cycle working media.And it adopts
Use carbon dioxide as working media, the supercritical carbon dioxide Brayton cycle done work in closed Bretton thermodynamic cycle
System is a kind of advanced power circulation system, which steams much higher than the tradition using steam as working media
Steam turbine and using combustion gas as the gas turbine of medium, and the system only needs the extraneous temperature for providing 500~800 DEG C, this is exactly answered
The temperature that can be easily reached with solar thermal collector and the heat build-up receiver prior art.
One key characteristic of supercritical carbon dioxide Brayton cycle is the renewable a large amount of heat after gas turbine exhaust
Amount (about the 60%~70% of total heat transmitting), therefore the performance recycled is heavily dependent on the efficiency of regenerator.And it prints
Printed circuit board formula heat exchanger is selection most competitive in the regenerator of supercritical carbon dioxide Brayton cycle, is especially existed
In terms of applicability and high efficiency under high pressure and hot conditions, printed circuit board heat exchanger (PCHE) is even more to have effect outstanding
Fruit because printed circuit board heat exchanger is that a kind of heat transfer property is excellent, efficient compact heat exchanger, have high temperature resistant,
It is high pressure resistant, leakage less, it is compact-sized, efficient the features such as, up to 60Mpa, maximum temperature can arrive the maximum pressure that can be born
900 DEG C, efficiency can be higher than 90%, and the volume of printed circuit board heat exchanger is conventional tube under identical thermal force and pressure drop
The 1/6~1/4 of shell heat exchanger.
The a part of printed circuit board heat exchanger as supercritical carbon dioxide Brayton Cycle system circuit, in difference
Cold and hot loop fluid temperature, the heat exchange efficiency under cold and hot loop fluid traffic conditions and cold fluid and hot fluid when flowing through heat exchanger
The pressure drop of generation can have an impact cycle performance, since the temperature and pressure of supercritical carbon dioxide fluid is all very high, into
When the flowing of row heat exchanger and heat-transfer character are tested, need will go into the CO2 gas of printed circuit board heat exchanger in advance into
Row pressurization and temperature adjustment are at supercriticality, and the experiment condition point of requirement of experiment measurement is more and Reynolds number variation range is big,
Not only it requires the carbon dioxide into the cold and hot side of heat exchanger to reach postcritical temperature and pressure, but also requires the temperature of the fluid media (medium)
It can be adjusted according to requirement of experiment in subcritical range with pressure, while the experiment number of different Reynolds number range in order to obtain
According to also requiring the flow in cold and hot circuit that can also be adjusted.
Due to many restrictions, supercritical CO 2 is used to flow as the printed circuit board heat exchanger of medium both at home and abroad at present
Research on Heat Transfer Characteristics lacks the device that can be directly used for college teaching and experimental study mostly based on numerical simulation and theory analysis
And method.
Summary of the invention
In view of the deficiencies of the prior art, the present invention provides a kind of supercritical carbon dioxide printed circuit board heat exchangers
Energy test device provides a kind of for measuring the flowing of supercritical carbon dioxide fluid printed circuit board heat exchanger and heat exchange property
, the experimental provision and method of college teaching and research.
In order to achieve the above object, the present invention is achieved by the following technical programs.
The embodiment of the invention provides a kind of supercritical carbon dioxide printed circuit board performance testing device of heat exchanger, use
In the test of supercritical carbon dioxide supercritical carbon dioxide printed circuit board heat exchanger, including hot side fluid circulation loop,
Cold-side fluid circulation loop and data acquisition computer, wherein
The hot side fluid circulation loop adds comprising the first carbon dioxide liquid storage device, the first CO2 compressor, the first air electricity
Hot device and the first cooler, the fluid exit of the first carbon dioxide liquid storage device are connected to first CO2 compressor, institute
It states the first CO2 compressor and is connected to first electric airheater, first electric airheater is connected to overcritical two
The hot side passage inlet of carbonoxide printed circuit board heat exchanger, the supercritical carbon dioxide printed circuit board heat exchanger
Hot side lane exit is connected to first cooler, and first cooler is connected to the stream of the first carbon dioxide liquid storage device
Body recovery end；
The cold-side fluid circulation loop adds comprising the second carbon dioxide liquid storage device, the second CO2 compressor, the second air electricity
The fluid exit of hot device, the second cooler and third cooler, the second carbon dioxide liquid storage device is connected to described second
CO2 compressor, second CO2 compressor are connected to second electric airheater, and second electric airheater connects
Second cooler is passed to, second cooler is connected to the supercritical carbon dioxide printed circuit board heat exchanger
The cold side lane exit of cold side passage inlet, the supercritical carbon dioxide printed circuit board heat exchanger is connected to the third
Cooler, the third cooler are connected to the fluid recovery end of the second carbon dioxide liquid storage device；
The hot side fluid circulation loop and the cold-side fluid circulation loop are electrically connected to the data acquisition and calculate
Machine.
Preferably, it is provided with the first shut-off valve between the first carbon dioxide liquid storage device and first CO2 compressor,
The first mass flowmenter and the first temperature sensing are provided between first CO2 compressor and first electric airheater
Device is provided with the first peace between first electric airheater and the supercritical carbon dioxide printed circuit board heat exchanger
Full valve, second temperature sensor and first pressure sensor, the supercritical carbon dioxide printed circuit board heat exchanger and institute
It states and is provided with third temperature sensor, second pressure sensor and the first pressure reducing valve between the first cooler, described first is cooling
The 4th temperature sensor and the first check valve are provided between device and the first carbon dioxide liquid storage device.
Preferably, first mass flowmenter, first temperature sensor, the second temperature sensor, described
First pressure sensor, the third temperature sensor, the second pressure sensor and the 4th temperature sensor are electric
Connect the data acquisition computer.
Preferably, it is provided with the second shut-off valve between the second carbon dioxide liquid storage device and second CO2 compressor,
The second mass flowmenter and the 5th temperature sensing are provided between second CO2 compressor and second electric airheater
Device, is provided with the second safety valve between second electric airheater and second cooler, second cooler with
It is provided with the 6th temperature sensor and third pressure sensor between the supercritical carbon dioxide printed circuit board heat exchanger,
Be provided between the supercritical carbon dioxide printed circuit board heat exchanger and the third cooler the 4th pressure sensor,
7th temperature sensor and the second pressure reducing valve are provided between the third cooler and the second carbon dioxide liquid storage device
Eight temperature sensors and second one-way valve.
Preferably, second mass flowmenter, the 5th temperature sensor, the 6th temperature sensor, described
Third pressure sensor, the 4th pressure sensor, the 7th temperature sensor and the 8th temperature sensor are electric
Connect the data acquisition computer.
Preferably, first electric airheater and second electric airheater are the adjustable pipeline of heating power
Formula electric airheater structure, first cooler, second cooler and the third cooler are that heat transferring medium is
The adjustable cannula type structure of water.
Preferably, the first carbon dioxide liquid storage device and the second carbon dioxide reservoir fluid arrival end are provided with shut-off valve.
Beneficial effect
The present invention provides a kind of supercritical carbon dioxide printed circuit board performance testing device of heat exchanger.Have following
The utility model has the advantages that
The supercritical carbon dioxide printed circuit board performance testing device of heat exchanger, compared with prior art, using this
The experimental provision of invention can realize that the cold and hot circuit for supercritical carbon dioxide printed circuit board heat exchanger to be measured mentions respectively
For testing the supercritical carbon dioxide fluid of the temperature and pressure of demand, temperature, pressure and the mass flow of cold and hot loop fluid
It can be adjusted according to experiment condition point, CO 2 fluid medium can be recycled.The device can test, record and in real time
Monitor fluid flow, inlet pressure, inlet temperature, the outlet pressure, outlet temperature experimental data in the cold and hot circuit of heat exchanger, the reality
The precision of experiment device test is high, and the reliability and repeatability of test are strong.
Detailed description of the invention
Fig. 1 is to survey provided by the present invention for the flowing of supercritical carbon dioxide printed circuit board heat exchanger and heat transfer property
The experimental provision schematic diagram of the device and method of examination.
In figure: the first carbon dioxide of 1- liquid storage device, the first shut-off valve of 2-, the first CO2 compressor of 3-, the first mass flow of 4-
Meter, the first temperature sensor of 5-, the first electric airheater of 6-, the first safety valve of 7-, 8- second temperature sensor, 9- first pressure
Force snesor, 10- supercritical carbon dioxide printed circuit board heat exchanger, 11- third temperature sensor, 12- second pressure pass
Sensor, the first pressure reducing valve of 13-, the first cooler of 14-, the 4th temperature sensor of 15-, the first check valve of 16-, the second dioxy of 17-
Change carbon liquid storage device, the second shut-off valve of 18-, the second CO2 compressor of 19-, the second mass flowmenter of 20-, the 5th temperature sensing of 21-
Device, the second electric airheater of 22-, the second safety valve of 23-, the second cooler of 24-, the 6th temperature sensor of 25-, 26- third
Pressure sensor, the 4th pressure sensor of 27-, the 7th temperature sensor of 28-, the second pressure reducing valve of 29-, 30- third cooler,
The 8th temperature sensor of 31-, 32- second one-way valve, 33- data acquisition computer.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Referring to Fig. 1, hot side circuit the I: the first carbon dioxide liquid storage device 1 passes through the first shut-off valve 2 and the first CO2 compressor
3 are connected, and the CO2 fluid come out from the first carbon dioxide liquid storage device 1 enters heating function after the pressurization of the first CO2 compressor 3
Temperature is promoted the further heat temperature raising of CO2 fluid by adjustable first electric airheater 6 of rate, the first electric airheater 6
To testing inlet temperature target value required for exchanger heat side liquid, the upstream arrangement one of the first electric airheater 6 the
One temperature sensor 5 is used to monitor the inlet temperature of the first electric airheater 6, while according to the first electric airheater 6
Inlet temperature regulation 6 heating time of the first electric airheater, the first safety valve of downstream connection 7 of the first electric airheater 6,
For guaranteeing that the operating pressure of hot side experimental loop meets system safe-working pressure requirement, the first electric airheater 6 is come out
Supercritical fluid CO 2 then go through the hot side access of supercritical carbon dioxide printed circuit board heat exchanger 10 and exchange heat
Experiment, 10 hot side outlet of supercritical carbon dioxide printed circuit board heat exchanger connects the first pressure reducing valve 13, to hot side outlet
Supercritical fluid CO 2 carries out expansion decompression, 13 pressure adjustable of the first pressure reducing valve, to ensure the air-breathing of the first CO2 compressor 3
Pressure is stablized, 13 the first cooler of downstream connection 14 of the first pressure reducing valve, which is the adjustable casing of cold-side loop
Formula cooler, cold-side fluid are water, and first cooler 14 cools down to supercritical fluid CO 2, take away fluid heat, are protected
The energy balance of whole system is demonstrate,proved, 14 outlet end of the first cooler is provided with the 4th temperature sensor 15, cold for monitoring first
But the outlet temperature of device 14.CO2 fluid after cooling flows back into the first carbon dioxide liquid storage device 1 by the first check valve 16 again
In, the flow circuit in hot side circuit is completed, 1 arrival end of the first carbon dioxide liquid storage device is provided with shut-off valve, prevents the first dioxy
The supercritical fluid CO 2 changed in carbon liquid storage device 1 is flow backwards, when supercritical fluid CO 2 deficiency in hot side circuit, by the first titanium dioxide
The input of 1 arrival end of carbon liquid storage device.
The II: the second carbon dioxide of cold-side loop liquid storage device 17 is connected by the second shut-off valve 18 with the second CO2 compressor 19,
For the CO2 fluid come out from the second carbon dioxide liquid storage device 17 after the pressurization of the second CO2 compressor 19, entering heating power can
CO2 fluid is carried out heat temperature raising, the upstream arrangement of the second electric airheater 22 on demand by the second electric airheater 22 adjusted
One the 5th temperature sensor 21 is used to monitor the inlet temperature of the second electric airheater 22, while being added according to the second air electricity
The inlet temperature of hot device 22 regulates and controls 22 heating time of the second electric airheater, and temperature is promoted to needed for heat exchanger cold-side fluid
The experiment inlet temperature target value wanted, the second safety valve of downstream connection 23 of the second electric airheater 22, for guaranteeing hot side
The operating pressure of experimental loop meets system safe-working pressure requirement.Second safety valve, 23 downstream connection bushing type second is cooling
Device 24 carries out radiating and cooling to the CO2 fluid that the second CO2 compressor 19 exports on demand, for ensuring that supercritical carbon dioxide prints
The inlet temperature of the cold-side loop of printed circuit board formula heat exchanger 10 meets experiment demand, since cold survey time road needs to carry out two-way tune
Temperature, system run when the second electric airheater 22 and the second cooler 24 only one of them work, to meet the cold survey of heat exchanger
The demand of passage experiment temperature, the supercritical fluid CO 2 that the second cooler of bushing type 24 comes out then go through overcritical dioxy
The cold-side loop for changing carbon printed circuit board heat exchanger 10 carries out local heat transfer.The heat exchange of supercritical carbon dioxide printed circuit board
10 cold side outlet port of device connects the second pressure reducing valve 29, and the supercritical fluid CO 2 of cold side outlet port carries out expansion decompression, the pressure reducing valve pressure
It is adjustable, to ensure that the pressure of inspiration(Pi) of the second CO2 compressor 19 is stablized, 29 downstream connection third cooler 30 of the second pressure reducing valve, institute
Stating third cooler 30 is the adjustable double-pipe cooler of cold-side loop, and the cold-side fluid of the cooler is water, the cooler pair
Supercritical fluid CO 2 cools down, and takes away fluid heat, to guarantee the energy balance of whole system.CO2 fluid is cooling in third
Device 30 is flowed back into the second carbon dioxide liquid storage device 17 after cooling down by second one-way valve 32 again, completes the flowing of cold-side loop
Circulation, 17 arrival end of the second carbon dioxide liquid storage device is provided with shut-off valve, and prevent in the second carbon dioxide liquid storage device 17 super faces
Boundary's CO2 reverse flow of fluids, it is defeated by 17 arrival end of the second carbon dioxide liquid storage device when supercritical fluid CO 2 deficiency in cold-side loop
Enter.
CO2 fluid has respectively entered supercritical carbon dioxide after hot and cold side loop temperature-adjustment pressure-adjustment with supercriticality
Local heat transfer is carried out in the cold and hot side access of printed circuit board heat exchanger 10.In hot survey time road, supercritical carbon dioxide printing
10 arrival end of circuit board type heat exchanger is provided with second temperature sensor 8 and first pressure sensor 9, faces for monitoring into super
The temperature and pressure of the supercritical fluid CO 2 of boundary's carbon dioxide printed circuit board heat exchanger 10, outlet end is provided with third temperature
Sensor 11 and second pressure sensor 12 are spent, is changed for monitoring by supercritical carbon dioxide printed circuit board heat exchanger 10
The temperature and pressure of supercritical fluid CO 2 after heat.In cold survey time road, supercritical carbon dioxide printed circuit board heat exchanger
10 arrival ends are provided with the 6th temperature sensor 25 and third pressure sensor 26, enter supercritical carbon dioxide print for monitoring
The temperature and pressure of the supercritical fluid CO 2 of printed circuit board formula heat exchanger 10, outlet end are provided with 27 He of the 4th pressure sensor
7th temperature sensor 28, for monitoring super facing after exchanging heat by supercritical carbon dioxide printed circuit board heat exchanger 10
The temperature and pressure of boundary's CO2 fluid.
It is passed by the second temperature of the inlet and outlet of the cold and hot side loop of supercritical carbon dioxide printed circuit board heat exchanger 10
Sensor 8, third temperature sensor 11, the 7th temperature sensor 28, the 6th temperature sensor 25, first pressure sensor 9, second
Pressure sensor 12, the 4th pressure sensor 27 and third pressure sensor 26 record the inlet and outlet of the cold and hot side of heat exchanger respectively
Pressure and temperature experimental data passes through the first mass flowmenter 4 of cold and hot side loop, the second mass flowmenter 20 record printing electricity
The mass flow experimental data of the cold and hot side loop of circuit plate radiator, the sensor are each coupled electrically to data acquisition computer
33, the data stepping that data acquisition computer 33 acquires above-mentioned all the sensors records, and generates data summary table, makes reality
It is very clear to test data.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (7)
1. a kind of supercritical carbon dioxide printed circuit board performance testing device of heat exchanger surpasses for supercritical carbon dioxide and faces
The test of boundary's carbon dioxide printed circuit board heat exchanger, it is characterised in that: flowed including hot side fluid circulation loop (I), cold side
Body circulation circuit (II) and data acquisition computer (33), wherein
The hot side fluid circulation loop (I) includes the first carbon dioxide liquid storage device (1), the first CO2 compressor (3), the first sky
Pneumoelectric heater (6) and the first cooler (14), the fluid exit of the first carbon dioxide liquid storage device (1) are connected to described
First CO2 compressor (3), first CO2 compressor (3) are connected to first electric airheater (6), and described first is empty
Pneumoelectric heater (6) is connected to the hot side passage inlet of supercritical carbon dioxide printed circuit board heat exchanger (10), described super
The hot side lane exit of critical carbon dioxide printed circuit board heat exchanger (10) is connected to first cooler (14), and described the
One cooler (14) is connected to the fluid recovery end of the first carbon dioxide liquid storage device (1)；
The cold-side fluid circulation loop (II) includes the second carbon dioxide liquid storage device (17), the second CO2 compressor (19), second
Electric airheater (22), the second cooler (24) and third cooler (30), the second carbon dioxide liquid storage device (17)
Fluid exit is connected to second CO2 compressor (19), and second CO2 compressor (19) is connected to second air
Electric heater (22), second electric airheater (22) are connected to second cooler (24), second cooler
(24) it is connected to the cold side passage inlet of the supercritical carbon dioxide printed circuit board heat exchanger (10), described overcritical two
The cold side lane exit of carbonoxide printed circuit board heat exchanger (10) is connected to the third cooler (30), and the third is cold
But device (30) is connected to the fluid recovery end of the second carbon dioxide liquid storage device (17)；
The hot side fluid circulation loop (I) and the cold-side fluid circulation loop (II) are electrically connected to the data acquisition meter
Calculation machine (33).
2. a kind of supercritical carbon dioxide printed circuit board performance testing device of heat exchanger according to claim 1,
It is characterized in that: being provided with the first shut-off valve between the first carbon dioxide liquid storage device (1) and first CO2 compressor (3)
(2), the first mass flowmenter (4) are provided between first CO2 compressor (3) and first electric airheater (6)
With the first temperature sensor (5), first electric airheater (6) is changed with the supercritical carbon dioxide printed circuit board
It is provided with the first safety valve (7), second temperature sensor (8) and first pressure sensor (9) between hot device (10), it is described super to face
Third temperature sensor is provided between boundary's carbon dioxide printed circuit board heat exchanger (10) and first cooler (14)
(11), second pressure sensor (12) and the first pressure reducing valve (13), first cooler (14) and first carbon dioxide
The 4th temperature sensor (15) and the first check valve (16) are provided between liquid storage device (1).
3. a kind of supercritical carbon dioxide printed circuit board performance testing device of heat exchanger according to claim 2,
It is characterized in that: first mass flowmenter (4), first temperature sensor (5), the second temperature sensor (8), institute
State first pressure sensor (9), the third temperature sensor (11), the second pressure sensor (12) and the 4th temperature
Degree sensor (15) is electrically connected the data acquisition computer (33).
4. a kind of supercritical carbon dioxide printed circuit board performance testing device of heat exchanger according to claim 1,
It is characterized in that: being provided with the second cut-off between the second carbon dioxide liquid storage device (17) and second CO2 compressor (19)
Valve (18) is provided with the second mass flow between second CO2 compressor (19) and second electric airheater (22)
(20) and the 5th temperature sensor (21) are counted, is set between second electric airheater (22) and second cooler (24)
It is equipped with the second safety valve (23), second cooler (24) and the supercritical carbon dioxide printed circuit board heat exchanger
(10) the 6th temperature sensor (25) and third pressure sensor (26), the supercritical carbon dioxide printing electricity are provided between
The 4th pressure sensor (27), the 7th temperature sensing are provided between circuit plate heat exchanger (10) and the third cooler (30)
Device (28) and the second pressure reducing valve (29) are arranged between the third cooler (30) and the second carbon dioxide liquid storage device (17)
There are the 8th temperature sensor (31) and second one-way valve (32).
5. a kind of supercritical carbon dioxide printed circuit board performance testing device of heat exchanger according to claim 4,
It is characterized in that: second mass flowmenter (20), the 5th temperature sensor (21), the 6th temperature sensor
(25), the third pressure sensor (26), the 4th pressure sensor (27), the 7th temperature sensor (28) and institute
It states the 8th temperature sensor (31) and is electrically connected the data acquisition computer (33).
6. a kind of supercritical carbon dioxide printed circuit board performance testing device of heat exchanger according to claim 1,
Be characterized in that: first electric airheater (6) and second electric airheater (22) are the adjustable pipe of heating power
Road formula electric airheater structure, first cooler (14), second cooler (24) and the third cooler
(30) it is adjustable cannula type structure that heat transferring medium is water.
7. a kind of supercritical carbon dioxide printed circuit board performance testing device of heat exchanger according to claim 1,
Be characterized in that: the first carbon dioxide liquid storage device (1) and second carbon dioxide liquid storage device (17) fluid inlet end are provided with shut-off valve.
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