CN107607580A - Additional ultrasound-enhanced complicated micro lubricative pores array microchannel boiling heat transfer experiment system - Google Patents
Additional ultrasound-enhanced complicated micro lubricative pores array microchannel boiling heat transfer experiment system Download PDFInfo
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- CN107607580A CN107607580A CN201710912633.3A CN201710912633A CN107607580A CN 107607580 A CN107607580 A CN 107607580A CN 201710912633 A CN201710912633 A CN 201710912633A CN 107607580 A CN107607580 A CN 107607580A
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Abstract
The present invention discloses a kind of additional ultrasound-enhanced complicated micro lubricative pores array microchannel boiling heat transfer experiment system, including heater control system, data collecting system, additional ultrasonic field generating means, priming device, and the heat-exchange working medium of heat-exchange working medium circulation loop is in turn connected to form by pipeline and follows bad control system, liquid inlet temperature control system, heat transfer experiments section, described additional ultrasonic field generating means acts on heat transfer experiments section, and the data collecting system is used to gather heat transfer experiments section temperature and bubble video information；The heater control system is used to control heat transfer experiments section temperature, and the priming device is used to inject heat-exchange working medium into heat-exchange working medium circulation loop.The present invention is workable, measuring accuracy is high, can be widely used for micro-channel phase-change heat transfer performance test.
Description
Technical field
The present invention relates to a kind of micro-channel phase-change heat transfer field, and in particular to a kind of additional ultrasound-enhanced complexity is microcosmic recessed
Chamber array microchannel boiling heat transfer experiment system.
Technical background
With the development of science and technology electronic unit and equipment tend to integrated, the heat-transfer equipment of the big passage of tradition can not expire
The diabatic process of sufficient electronic chip, the fine sizes passage with high surface area ratio and heat exchange efficiency turn into current Technological research
Augmentation of heat transfer important development direction.
Microstructure heat exchanger not only has efficiently excellent heat exchange property, and simple in construction, compact, in order to further
The heat exchange efficiency of micro-channel heat exchanger is efficiently improved, researchers are based on engineering means, are surface-treated from conduit, additional
Etc. carry out augmentation of heat transfer, for strengthening problem in micro-channel phase transformation, its it is theoretical so far can't more accurate description
With pre- fluid measured in micro-channel phase-change heat transfer characteristic, it is therefore desirable to the experiment test of system and at a high speed visualization are received to study
Phase-change heat transfer processes and enhanced heat transfer character of the meter Liu Ti in micro-channel, in this context, invent a kind of additional ultrasonic field
Strengthen complicated micro lubricative pores array microchannel boiling heat transfer experiment system.This test system and method can be used for testing additional sound
Dynamic phase transitions process and its enhanced heat transfer character in field action micro-channel.
The content of the invention
For above-mentioned technical problem, the present invention provides a kind of additional ultrasonic field and strengthens complicated micro lubricative pores array microchannel boiling
Heat transfer experiment system is risen, it is special effectively to observe the nucleate boiling heat transfer strengthened under sound field reflecting in complicated wetting surface microchannel
Property.
The present invention adopts the following technical scheme that realization：
A kind of additional ultrasound-enhanced complicated micro lubricative pores array microchannel boiling heat transfer experiment system, including heater control
System processed, data collecting system, additional ultrasonic field generating means, priming device, and heat exchange is in turn connected to form by pipeline
The heat-exchange working medium in working medium circulation loop follows bad control system, liquid inlet temperature control system, heat transfer experiments section, and described is additional
Ultrasonic field generating means acts on heat transfer experiments section, and the data collecting system is used to gather heat transfer experiments section temperature and bubble regards
Frequency information；The heater control system is used to control heat transfer experiments section temperature, and the priming device is used for heat-exchange working medium
Heat-exchange working medium is injected in circulation loop；Described heat transfer experiments section from top to bottom include be sequentially connected upper cover plate, oscillating plate, can
It is uniform in the base cover plate depending on change cover plate, micro-channel evaporator, experimental section cavity, calandria, insulator, base cover plate
It is provided with and is upward through some single head heating tubes that insulator goes directly in calandria, calandria and the experimental section cavity is distributed with
The upper and lower evenly spaced thermometer hole of two rows；The micro-channel evaporator includes plate-shaped bar body, the upper surface edge of the main body
Length direction is arranged with some rectangle micro-channels in parallel, and the single micro-channel bottom table internal arrangement is provided with down " Ω " word
The micro lubricative pores array of type.
Further, described additional ultrasonic field generating means includes supersonic generator, some ultrasonic oscillators, described
The rated power of supersonic generator be 800-1500W, the ultrasonic oscillator frequency is 20kHz-60kHz；The ultrasound
Ripple oscillator by weld screw and solidification glue be uniformly fixed to along its length on oscillating plate and respectively with ultrasonic wave occur
Device circuit connects.
Further, the sectional dimension of described micro-channel is 1.5mm × 1.5mm；Between the micro lubricative pores array
Gauge arranges 4~5 rows, 490~647 row micro lubricative pores from for 0.3mm~0.4mm, the single micro-channel the inside.
Further, the angle of the upper shed wall of the micro lubricative pores and the micro-channel basal surface is more than described fine
The static contact angle θ of passage basal surface；Upper shed diameter 0.014mm≤D≤0.67mm of the micro lubricative pores；It is described microcosmic recessed
The depth of chamber is 0.4mm~0.6mm.
Further, described micro-channel basal surface is provided with hydrophobe spaced apart areas along heat-exchange working medium flow direction.
Further, described heater control system includes being sequentially connected described single head heating tube by circuit
Power shows table, power governor, switch cabinet, and described single head heating tube is electric heating tube.
Further, described heat-exchange working medium, which follows bad control system, includes heat-exchange working medium cooling device, hydrodynamic driving
Device, described hydrodynamic drive device include the magnetic drive pump and frequency converter of circuit connection, the output end of described magnetic drive pump
Filter, spinner flowmeter, liquid inlet temperature control system, input connection liquid storage are sequentially connected by pipeline and gate valve
Tank；Described heat-exchange working medium cooling device includes the cooling water tank of pipeline connection and cooling unit, outflow heat transfer experiments section are changed
Hot working fluid flows into the fluid reservoir after being cooled down in cooling water tank.
Further, described data collecting system includes high-speed camera instrument, K-type thermocouple, data collecting instrument, industry control
Case, computer monitor, described K-type thermocouple are arranged in the thermometer hole, and by circuit be sequentially connected data collecting instrument,
Industrial control box and computer monitor, described high-speed camera instrument is connected with industrial control box circuit, for gathering the bubble of heat transfer experiments section
Video information.
Further, described liquid inlet temperature control system includes accommodating temperature control box, the temperature control of heat transferring medium
Device processed, heating rod, temperature sensor, described heating rod, temperature sensor stretch into temperature control box and respectively with temperature controller
Circuit connects.
Further, it is connected to the heat-exchange working medium and follows bad control system, liquid inlet temperature control system, heat transfer experiments
Some visors, hand valve and pressure gauge are serially connected with pipeline between section, side is connected to pin on the export pipeline of the heat transfer experiments section
Valve.
Compared with prior art, additional ultrasound-enhanced complicated micro lubricative pores array microchannel boiling heat transfer provided by the present invention
Experimental system can be used for testing dynamic phase transitions process and its enhanced heat transfer character in additional sound field reflecting micro-channel, operable
Property is strong, measuring accuracy is high, can be widely used for micro-channel phase-change heat transfer performance test.
Brief description of the drawings
Fig. 1 is the pilot system overall structure diagram of the embodiment of the present invention.
Fig. 2 is the heat transfer experiments section of the embodiment of the present invention and additional ultrasonic field generating means connection diagram.
The local heat transfer section exploded perspective view of Fig. 3 embodiment of the present invention.
Fig. 4 is the micro-channel evaporator schematic front view of the embodiment of the present invention.
Fig. 5 is the micro-channel evaporator left view schematic diagram of the embodiment of the present invention.
Fig. 6 is the micro lubricative pores enlarged diagram of the micro-channel evaporator of the embodiment of the present invention.
Fig. 7 is the micro-channel evaporator mathematical heat transfer test model schematic diagram of the embodiment of the present invention.
In figure：1. magnetic drive pump；2. frequency converter；3. filter；4-1~4-6. visors；5-1~5-12. hand valves；6. rotor stream
Gauge；7. heating rod；8. temperature sensor；9. temperature controller；10. single-end electrothermal tube (6)；11. power shows table；12.
Power governor；13. switch cabinet；14. heat transfer experiments section；14-1- upper cover plates；14-2- oscillating plates；14-3- visualizes cover plate；
14-4- micro-channel evaporators；14-5- experimental section cavitys；14-6- calandrias；The insulators of 14-7- first；14-8- second is heat-insulated
Body；14-9- base cover plates；15.K type thermocouples；16.Agilent-34970a data collecting instruments (34901A acquisition modules)；17.
Industrial control box；18. computer monitor；19. ultrasonic oscillator；20. supersonic generator；21. high-speed camera instrument；22. needle-valve；23-1
~23-3. pressure gauges；24. priming device；25. cooling water tank；26. cool down unit；27. fluid reservoir.
Embodiment
The goal of the invention of the present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings, embodiment is not
It can repeat one by one herein, but therefore embodiments of the present invention are not defined in following examples.
As shown in Figure 1 to Figure 3, a kind of additional ultrasound-enhanced complicated micro lubricative pores array microchannel boiling heat transfer experiment system
System, including heater control system, data collecting system, additional ultrasonic field generating means, priming device 24, and pass through pipe
The heat-exchange working medium that road is in turn connected to form heat-exchange working medium circulation loop follows bad control system, liquid inlet temperature control system, changed
Heat test section 14, described additional ultrasonic field generating means act on heat transfer experiments section 14, and the data collecting system is used to adopt
Collect heat transfer experiments section temperature and bubble video information；The heater control system is used to control the temperature of heat transfer experiments section 14,
The priming device 24 is used to inject heat-exchange working medium into heat-exchange working medium circulation loop；Described heat transfer experiments section (14) is by up to
The lower upper cover plate 14-1 for including being sequentially connected, oscillating plate 14-2, visualization cover plate 14-3, micro-channel evaporator 14-4, experiment
Section cavity 14-5, calandria 14-6, insulator, it is evenly arranged with base cover plate 14-9, the base cover plate 14-9 and wears upwards
Cross six single head heating tubes 10 that insulator goes directly in calandria 14-6, calandria 14-6 and experimental section cavity the 14-5 distributions
There is a upper and lower evenly spaced thermometer hole of two rows, the spacing distances of two row's thermometer holes is 20mm, a diameter of φ 2mm thermometer holes, left and right
The spacing distance of adjacent thermometer hole is 30mm；The insulator include up and down superposition set the first insulator 14-7, second every
Hot body 14-8；The micro-channel evaporator 14-4 includes plate-shaped bar body, and the upper surface of the main body is parallel along its length
Some rectangle micro-channels are provided with, the single micro-channel bottom table internal arrangement is provided with down the micro lubricative pores of " Ω " font
Array.
As shown in Fig. 2 described additional ultrasonic field generating means includes supersonic generator 20, some ultrasonic oscillators
19, the rated power of described supersonic generator 20 is 1000W, and the frequency of ultrasonic oscillator 2 is 20kHz-60kHz；Institute
Ultrasonic oscillator 19 is stated to be uniformly fixed to shake along its length by the screw and solidification glue being welded on oscillating plate 14-2
It is connected respectively on dynamic plate 14-2 and with the circuit of supersonic generator 20.
The power that described heater control system includes being sequentially connected described single head heating tube 10 by circuit shows
Show table 11, power governor 12, switch cabinet 13, described single head heating tube 10 is electric heating tube.
Described heat-exchange working medium, which follows bad control system, includes heat-exchange working medium cooling device, hydrodynamic drive device, described
Hydrodynamic drive device include the magnetic drive pump 1 and frequency converter 2 of circuit connection, the output end of described magnetic drive pump 1 passes through pipe
Road and gate valve are sequentially connected filter 3, spinner flowmeter 6, liquid inlet temperature control system, input connection fluid reservoir 27；
Described heat-exchange working medium cooling device includes the cooling water tank 25 of pipeline connection and cooling unit 26, outflow heat transfer experiments section are changed
Hot working fluid flows into the fluid reservoir 27 after being cooled down in cooling water tank 25.
Described data collecting system include high-speed camera instrument 21, K-type thermocouple 15, data collecting instrument 16, industrial control box 17,
Computer monitor 18, described K-type thermocouple 15 is arranged in the thermometer hole, and is sequentially connected Agilent- by circuit
34970a data collecting instruments 16, industrial control box 17 and computer monitor 18, described high-speed camera instrument 21 connect with the circuit of industrial control box 17
Connect, for gathering the bubble video information of heat transfer experiments section.
Described liquid inlet temperature control system includes accommodating the temperature control box of heat transferring medium, temperature controller 9, heating
Rod 7, temperature sensor 8, described heating rod 7, temperature sensor 8 stretch into temperature control box and respectively with the circuit of temperature controller 9
Connection.
The heat-exchange working medium is connected to follow between bad control system, liquid inlet temperature control system, heat transfer experiments section 14
Pipeline on be serially connected with some visor 4-1~4-6, hand valve 5-1~5-12 and pressure gauge 23-1~23-3, the heat transfer experiments section
It is other on 14 export pipeline to be connected to needle-valve 22.
As shown in Figure 4 and Figure 5, the sectional dimension of described micro-channel is 1.5mm × 1.5mm；The micro lubricative pores battle array
The spacing distance of row is 0.3mm, 4~5 rows of arrangement, 490~647 row micro lubricative pores inside the single micro-channel.
As shown in fig. 6, the angle of the upper shed wall of the micro lubricative pores and the micro-channel basal surface is more than described micro-
The static contact angle θ of thin passage basal surface；In the present embodiment, static contact angle θ=60 ° of micro-channel basal surface.Described
Micro-channel basal surface is provided with hydrophobe spaced apart areas along heat-exchange working medium flow direction, after hydrophilic surface is easy to bubble departure
The supplement of liquid, hydrophobic surface can increase bubble departure frequency, while the alternate striped of hydrophobe is easy to automatically cleaning.It is described microcosmic recessed
The upper shed diameter D=0.2mm of chamber, the depth of the micro lubricative pores is 0.6mm, and above cavity size characteristic can make cavity live
Change, cavity lower curtate is provided with spherical " the cavity mouth " of easy gas collection, a diameter of 0.4mm, and such a cavity shapes are easy to gas collection, easy vapour
Soak core (as shown in Figure 6).
The manufacture method of the micro-channel evaporator 14-4, including step：
1) direct metal laser sintering (DMLS) micro-channel evaporator in metal 3D printing method is used；
2) set in the heat-exchange working medium flow direction difference mass dryness fraction region of micro-channel evaporator surface by chemical deposition
Put hydrophobe spaced apart areas.
Further, the passing through of heat-exchange working medium flow direction difference mass dryness fraction region in micro-channel evaporator surface
The step of deposition sets hydrophobe spaced apart areas is learned to specifically include：
It is 10mm and different in width to set spacing by chemical deposition in heat-exchange working medium flow direction difference mass dryness fraction region
Hydrophilic region, mass dryness fraction less than 0.1 region set width be 2mm hydrophobic region, mass dryness fraction be 0.1~0.2 region set
The hydrophobic region that width is 1mm is put, it is complicated so as to form the alternate tool of hydrophobe in region of the mass dryness fraction more than 0.3 without hydrophobic striped
The micro-channel evaporator of micro lubricative pores array.In the present embodiment, because hydrophilic surface is easy to the benefit of liquid after bubble departure
Fill, hydrophobic surface can increase bubble departure frequency, while the alternate striped of hydrophobe is easy to automatically cleaning, therefore can effectively improve steaming
The heat transfer effect and durability of device are sent out, reduces maintenance cost.
The single channel cross-section figure of micro-channel evaporator 14-4 in heat transfer experiments section 14 is as shown in fig. 7, be based on
Heat exchange principle of energy balance in micro-channel evaporator 14-4, establish augmentation of heat transfer mathematical modeling in micro-channel, heat transfer system
Number h are that augmentation of heat transfer specifically tests mathematical modeling and is：
qe(Wch+2Ww)=h (Tw-Tsat)(Wch+2ηHch) (1)
T in formulasatFor refrigerant saturation temperature (unit：℃)；Fin heat transfer efficiency of the η between micro-channel, qeFor heat
Current density (unit：kw/m2), TwFor channel wall temperature (unit：DEG C), WwFor the spacing distance of single passage, WchLead to be single
The width in road, HchFor the depth of single passage.
T in formulaj, TiRepresent the temperature of measurement wall point up and down, H2In expression temperature measuring point to channel wall distance (unit：
DEG C), H1For the distance (unit of lower temperature measuring point to upper temperature measuring point：℃).
The present embodiment provides an experimental system and the heat transferring medium that priming device 24 injects designated volume is first passed through before operation,
After starting magnetic drive pump 1, heat transferring medium passes sequentially through filter 3, spinner flowmeter 6, liquid inlet temperature control system and heats, changes
Magnetic drive pump 1 is being flowed into by fluid reservoir 27 after heat test section 14, the cooling of cooling water tank 25, is forming heat transferring medium circulation loop.It is real
During testing, power governor 12 is used for the heating power for adjusting single-end electrothermal tube 10；Agilent-34970a data collecting instruments
The temperature of the heat transfer experiments section 14 of collection is transmitted to industrial control box 17, and shown by computer monitor 18；Described high speed
Video camera 21 is used to shoot the Bubble Formation Process for flowing through micro-channel evaporator 4-4 heat transferring medium in experimental section cavity 14-5
Transmit to industrial control box 17, and shown by computer monitor 18.
The above embodiment of the present invention is only intended to clearly illustrate example of the present invention, and is not to the present invention
Embodiment restriction.For those of ordinary skill in the field, can also make on the basis of the above description
Other various forms of changes or variation.There is no necessity and possibility to exhaust all the enbodiments.It is all the present invention
All any modification, equivalent and improvement made within spirit and principle etc., should be included in the protection of the claims in the present invention
Within the scope of.
Claims (10)
- A kind of 1. additional ultrasound-enhanced complicated micro lubricative pores array microchannel boiling heat transfer experiment system, it is characterised in that：Including Heater control system, data collecting system, additional ultrasonic field generating means, priming device (24), and by pipeline according to The heat-exchange working medium that secondary connection forms heat-exchange working medium circulation loop follows bad control system, liquid inlet temperature control system, heat exchange examination Section (14) is tested, described additional ultrasonic field generating means acts on heat transfer experiments section (14), and the data collecting system is used to adopt Collect heat transfer experiments section temperature and bubble video information；The heater control system is used to control heat transfer experiments section (14) warm Degree, the priming device (24) are used to inject heat-exchange working medium into heat-exchange working medium circulation loop；Described heat transfer experiments section (14) Upper cover plate (14-1), oscillating plate (14-2), visualization cover plate (14-3), the micro-channel for from top to bottom including being sequentially connected evaporate Device (14-4), experimental section cavity (14-5), calandria (14-6), insulator, base cover plate (14-9), the base cover plate (14- 9) it is evenly arranged with and is upward through some single head heating tubes (10) that insulator goes directly in calandria (14-6), the calandria The upper and lower evenly spaced thermometer hole of two rows is distributed with (14-6) and experimental section cavity (14-5)；The micro-channel evaporator (14-4) includes plate-shaped bar body, and the upper surface of the main body is arranged with some rectangle micro-channels in parallel along its length, single The individual micro-channel bottom table internal arrangement is provided with down the micro lubricative pores array of " Ω " font.
- 2. additional ultrasound-enhanced complicated micro lubricative pores array microchannel boiling heat transfer experiment system according to claim 1, It is characterized in that：Described additional ultrasonic field generating means includes supersonic generator (20), some ultrasonic oscillators (19), institute The rated power for the supersonic generator (20) stated is 800-1500W, and ultrasonic oscillator (2) frequency is 20kHz-60kHz； The ultrasonic oscillator (19) is uniformly fixed on oscillating plate (14-2) along its length by welding screw and solidification glue And it is connected respectively with supersonic generator (20) circuit.
- 3. additional ultrasound-enhanced complicated micro lubricative pores array microchannel boiling heat transfer experiment system according to claim 1, It is characterized in that：The sectional dimension of described micro-channel is 1.5mm × 1.5mm；The spacing distance of the micro lubricative pores array For 0.3mm ~ 0.4mm, 4 ~ 5 rows of the single micro-channel the inside arrangement, 490 ~ 647 row micro lubricative pores.
- 4. additional ultrasound-enhanced complicated micro lubricative pores array microchannel boiling heat transfer experiment system according to claim 1, It is characterized in that：The angle of the upper shed wall of the micro lubricative pores and the micro-channel basal surface is more than the micro-channel bottom The static contact angle on surfaceθ；Upper shed diameter 0.014mm≤D≤0.67mm of the micro lubricative pores；The depth of the micro lubricative pores Spend for 0.4 mm ~ 0.6mm.
- 5. additional ultrasound-enhanced complicated micro lubricative pores array microchannel boiling according to any one of claim 1 to 4 passes Hot experimental system, it is characterised in that：It is alternate that described micro-channel basal surface along heat-exchange working medium flow direction is provided with hydrophobe Region.
- 6. additional ultrasound-enhanced complicated micro lubricative pores array microchannel boiling heat transfer experiment system according to claim 1, It is characterized in that：Described heater control system includes being sequentially connected the work(of described single head heating tube (10) by circuit Rate shows table (11), power governor (12), switch cabinet (13), and described single head heating tube (10) is electric heating tube.
- 7. additional ultrasound-enhanced complicated micro lubricative pores array microchannel boiling heat transfer experiment system according to claim 1, It is characterized in that：Described heat-exchange working medium, which follows bad control system, includes heat-exchange working medium cooling device, hydrodynamic drive device, institute The hydrodynamic drive device stated includes the magnetic drive pump (1) and frequency converter (2) of circuit connection, the output of described magnetic drive pump (1) End is sequentially connected filter (3), spinner flowmeter (6), liquid inlet temperature control system by pipeline and gate valve, and input connects Connect fluid reservoir (27)；Described heat-exchange working medium cooling device includes the cooling water tank (25) and cooling unit (26) of pipeline connection, The heat-exchange working medium of outflow heat transfer experiments section flows into the fluid reservoir (27) after being cooled down in cooling water tank (25).
- 8. additional ultrasound-enhanced complicated micro lubricative pores array microchannel boiling heat transfer experiment system according to claim 1, It is characterized in that：Described data collecting system include high-speed camera instrument (21), K-type thermocouple (15), data collecting instrument (16), Industrial control box (17), computer monitor (18), described K-type thermocouple (15) are arranged in the thermometer hole, and by circuit according to Secondary connection data collecting instrument (16), industrial control box (17) and computer monitor (18), described high-speed camera instrument (21) and industrial control box (17) circuit connects, for gathering the bubble video information of heat transfer experiments section.
- 9. additional ultrasound-enhanced complicated micro lubricative pores array microchannel boiling heat transfer experiment system according to claim 1, It is characterized in that：Described liquid inlet temperature control system includes accommodating temperature control box, the temperature controller of heat transferring medium (9), heating rod (7), temperature sensor (8), described heating rod (7), temperature sensor (8) stretch into temperature control box and respectively with Temperature controller (9) circuit connects.
- 10. additional ultrasound-enhanced complicated micro lubricative pores array microchannel boiling heat transfer experiment system according to claim 1, It is characterized in that：It is connected to the heat-exchange working medium and follows bad control system, liquid inlet temperature control system, heat transfer experiments section (14) Between pipeline on be serially connected with some visors, hand valve and pressure gauge, it is other on the export pipeline of the heat transfer experiments section (14) to be connected to Needle-valve (22).
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| CN108802090A (en) * | 2018-06-22 | 2018-11-13 | 内蒙古工业大学 | A kind of microchannel nano-fluid enhanced heat exchange experiment test device |
| CN110487095A (en) * | 2019-07-31 | 2019-11-22 | 四川大学 | A kind of ultrasound-enhanced heat transfer pool cooling device using bubble miniaturization boiling |
| CN111007103A (en) * | 2019-12-18 | 2020-04-14 | 西安科技大学 | Sleeve type mine heat recovery experimental device and method containing phase change heat storage material |
| CN112683337A (en) * | 2021-01-15 | 2021-04-20 | 哈尔滨工程大学 | Parallel plate bundle pressure field and flow field synchronous measurement experimental device |
| CN114252477A (en) * | 2021-12-30 | 2022-03-29 | 中国科学院力学研究所 | Carbon dioxide mixed working medium's circulation microchannel heat transfer experimental apparatus |
| CN116660311A (en) * | 2023-04-12 | 2023-08-29 | 中国科学院力学研究所 | Integrated heating device capable of accurately realizing bubble excitation and monitoring and preparation method |
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| CN114252477B (en) * | 2021-12-30 | 2023-12-15 | 中国科学院力学研究所 | Carbon dioxide mixed working medium circulation micro-channel heat exchange experimental device |
| CN116660311A (en) * | 2023-04-12 | 2023-08-29 | 中国科学院力学研究所 | Integrated heating device capable of accurately realizing bubble excitation and monitoring and preparation method |
| CN116660311B (en) * | 2023-04-12 | 2024-01-23 | 中国科学院力学研究所 | Preparation method of integrated heating device capable of accurately realizing bubble excitation and monitoring |
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Application publication date: 20180119 |