CN207516288U - 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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- CN207516288U CN207516288U CN201721270954.XU CN201721270954U CN207516288U CN 207516288 U CN207516288 U CN 207516288U CN 201721270954 U CN201721270954 U CN 201721270954U CN 207516288 U CN207516288 U CN 207516288U
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Abstract
The utility model discloses a kind of additional ultrasound-enhanced complicated micro lubricative pores array microchannel boiling heat transfer experiment system, including heating unit 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, the additional ultrasonic field generating means acts on heat transfer experiments section, and the data collecting system is used to acquire heat transfer experiments section temperature and bubble video information；For controlling heat transfer experiments section temperature, the priming device is used to inject heat-exchange working medium into heat-exchange working medium circulation loop the heating unit control system.The utility model operability is strong, measuring accuracy is high, can be widely used for micro-channel phase-change heat transfer performance test.
Description
Technical field
The utility model is related to a kind of micro-channel phase-change heat transfer fields, and in particular to a kind of additional ultrasound-enhanced complexity is micro-
See cavity 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 channel of tradition can not expire
The diabatic process of sufficient electronic chip, the fine sizes channel with high surface area ratio and heat exchange efficiency have become current Technological research
Augmentation of heat transfer important development direction.
Microstructure heat exchanger not only has efficiently excellent heat exchange property, but also simple in structure, 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, 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, utility model are a kind of additional super
Sound field strengthens complicated micro lubricative pores array microchannel boiling heat transfer experiment system.It is outer that this test system and method can be used for test
Add dynamic phase transitions process and its enhanced heat transfer character in sound field reflecting micro-channel.
Utility model content
For above-mentioned technical problem, it is micro- logical that the utility model provides a kind of additional complicated micro lubricative pores array of ultrasonic field reinforcing
Road boiling heat transfer experiment system can effectively observe the nucleate boiling heat transfer strengthened under sound field reflecting in complicated wetting surface microchannel
Characteristic.
The utility model adopts the following technical solution realizes：
A kind of additional ultrasound-enhanced complicated micro lubricative pores array microchannel boiling heat transfer experiment system, including heating unit 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 circuit 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 acquire heat transfer experiments section temperature and bubble regards
Frequency information；For controlling heat transfer experiments section temperature, the priming device is used for heat-exchange working medium the heating unit control system
Heat-exchange working medium is injected in circulation loop；The heat transfer experiments section from top to bottom include sequentially connected upper cover plate, oscillating plate, can
It is uniform in the base cover plate depending on change cover board, micro-channel evaporator, experimental section cavity, calandria, insulator, base cover plate
It is provided with and is upward through several single head heating tubes that insulator goes directly in calandria, the calandria and experimental section cavity are distributed with
Upper and lower two rows of evenly spaced thermometer holes；The micro-channel evaporator includes plate-shaped bar body, the upper surface edge of the main body
Length direction is arranged in parallel with several rectangle micro-channels, and the single micro-channel bottom table internal arrangement is provided with down " Ω " word
The micro lubricative pores array of type.
Further, the additional ultrasonic field generating means includes supersonic generator, several ultrasonic oscillators, described
Supersonic generator rated power for 800-1500W, the ultrasonic oscillator frequency is 20kHz-60kHz；The ultrasound
Wave 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 the micro-channel is 1.5mm × 1.5mm；Between the micro lubricative pores array
Gauge is from for 0.3mm~0.4mm, 4~5 rows of arrangement, 490~647 row micro lubricative pores inside the single micro-channel.
Further, the angle of the upper perforated wall of the micro lubricative pores and the micro-channel bottom surface is more than described fine
The static contact angle θ of channel bottom surface；Upper opening 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, the micro-channel bottom surface is provided with hydrophobe spaced apart areas along heat-exchange working medium flow direction.
Further, the heating unit control system includes being sequentially connected the single head heating tube by circuit
Power shows table, power governor, switch cabinet, and the single head heating tube is electric heating tube.
Further, the heat-exchange working medium follows bad control system and is driven including heat-exchange working medium cooling device, hydrodynamic
Device, the hydrodynamic driving device include the magnetic drive pump and frequency converter of circuit connection, the output terminal of the magnetic drive pump
Filter, spinner flowmeter, liquid inlet temperature control system, input terminal connection liquid storage are sequentially connected by pipeline and gate valve
Tank；The 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, the data collecting system includes high-speed camera instrument, K-type thermocouple, data collecting instrument, industry control
Case, computer monitor, the K-type thermocouple are arranged in the thermometer hole, and pass through circuit be sequentially connected data collecting instrument,
Industrial control box and computer monitor, the high-speed camera instrument are connect with industrial control box circuit, for acquiring the bubble of heat transfer experiments section
Video information.
Further, the liquid inlet temperature control system includes accommodating temperature control box, the temperature control of heat transferring medium
Device processed, heating rod, temperature sensor, the 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
Several visors, hand valve and pressure gauge are serially connected on pipeline between section, side is connected to needle 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 provided by the utility model
Heat transfer experiment system can be used for testing dynamic phase transitions process and its enhanced heat transfer character in additional sound field reflecting micro-channel, can
Strong operability, measuring accuracy are high, can be widely used for micro-channel phase-change heat transfer performance test.
Description of the drawings
Fig. 1 is the pilot system overall structure diagram of the utility model embodiment.
Fig. 2 is the heat transfer experiments section of the utility model embodiment and additional ultrasonic field generating means connection diagram.
The local heat transfer section exploded perspective view of Fig. 3 the utility model embodiments.
Fig. 4 is the micro-channel evaporator schematic front view of the utility model embodiment.
Fig. 5 is the micro-channel evaporator left view schematic diagram of the utility model embodiment.
Fig. 6 is the micro lubricative pores enlarged diagram of the micro-channel evaporator of the utility model embodiment.
Fig. 7 is the micro-channel evaporator mathematical heat transfer test model schematic diagram of the utility model embodiment.
In figure：1. magnetic drive pump；2. frequency converter；3. filter；4-1~4-6. visors；5-1~5-12. hand valves；6. rotor
Flowmeter；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- visualization lids
Plate；14-4- micro-channel evaporators；14-5- experimental section cavitys；14-6- calandrias；The first insulators of 14-7-；14-8- second
Insulator；14-9- base cover plates；15.K type thermocouples；(34901A acquires mould to 16.Agilent-34970a data collecting instruments
Block)；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.
Specific embodiment
The purpose of utility model of the utility model is described in further detail in the following with reference to the drawings and specific embodiments,
Embodiment cannot repeat one by one herein, but therefore the embodiment of the utility model is not defined in following embodiment.
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 heating unit control system, data collecting system, additional ultrasonic field generating means, priming device 24 and passes 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, changes
Heat test section 14, the 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 heating unit control system is used to control 14 temperature of heat transfer experiments section,
The priming device 24 is used to inject heat-exchange working medium into heat-exchange working medium circulation loop；The heat transfer experiments section (14) by up to
Include sequentially connected upper cover plate 14-1, oscillating plate 14-2, visualization cover board 14-3, micro-channel evaporator 14-4, experiment down
Section cavity 14-5, it calandria 14-6, insulator, is evenly arranged on 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, the calandria 14-6 and experimental section cavity 14-5 distributions
There are upper and lower two rows of evenly spaced thermometer holes, the spacing distance of two rows of thermometer holes is 20mm, and a diameter of φ 2mm thermometer holes control
The spacing distance of adjacent thermometer hole is 30mm；The insulator include be superposed up and down 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
Several 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, the additional ultrasonic field generating means includes supersonic generator 20, several ultrasonic oscillators
19, the rated power of the supersonic generator 20 is 1000W, and 19 frequency of ultrasonic oscillator 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 connect on movable plate 14-2 and respectively with 20 circuit of supersonic generator.
The power that the heating unit control system includes being sequentially connected the single head heating tube 10 by circuit is shown
Show table 11, power governor 12, switch cabinet 13, the single head heating tube 10 is electric heating tube.
The heat-exchange working medium follows bad control system and includes heat-exchange working medium cooling device, hydrodynamic driving device, described
Hydrodynamic driving device include circuit connection magnetic drive pump 1 and frequency converter 2, the output terminal of the magnetic drive pump 1 pass through pipe
Road and gate valve are sequentially connected filter 3, spinner flowmeter 6, liquid inlet temperature control system, input terminal connection fluid reservoir 27；
The 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.
The data collecting system include high-speed camera instrument 21, K-type thermocouple 15, data collecting instrument 16, industrial control box 17,
Computer monitor 18, the K-type thermocouple 15 is arranged in the thermometer hole, and is passed through circuit and be sequentially connected Agilent-
34970a data collecting instruments 16, industrial control box 17 and computer monitor 18, the high-speed camera instrument 21 connect with 17 circuit of industrial control box
It connects, for acquiring the bubble video information of heat transfer experiments section.
The liquid inlet temperature control system includes accommodating the temperature control box of heat transferring medium, temperature controller 9, heating
Stick 7, temperature sensor 8, the heating rod 7, temperature sensor 8 stretch into temperature control box and respectively with 9 circuit of temperature controller
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 several visor 4-1~4-6, hand valve 5-1~5-12 and pressure gauge 23-1~23-3, the heat transfer experiments
It is other on the export pipeline of section 14 to be connected to needle-valve 22.
As shown in Figure 4 and Figure 5, the sectional dimension of the 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 perforated wall of the micro lubricative pores and the micro-channel bottom surface is more than described micro-
The static contact angle θ of thin channel bottom surface；In the present embodiment, static contact angle θ=60 ° of micro-channel bottom surface.Described
Micro-channel bottom 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 opening diameter D=0.2mm of chamber, the depth of the micro lubricative pores is 0.6mm, and more than cavity size characteristic can make cavity live
Change, cavity lower curtate is equipped with the spherical shape " cavity mouth " of easy gas collection, a diameter of 0.4mm, and such cavity shapes are convenient for gas collection, easy vapour
Soak core (as shown in Figure 6).
The manufacturing method of the micro-channel evaporator 14-4, including step：
1) using direct metal laser sintering (DMLS) micro-channel evaporator in metal 3D printing method；
2) it is 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 learning deposition setting hydrophobe spaced apart areas specifically includes：
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 setting 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
It fills, 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 establishes augmentation of heat transfer mathematical model in micro-channel, heat transfer system
Number h are that augmentation of heat transfer specifically tests mathematical model 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 channel, WchIt is single logical
The width in road, HchDepth for single channel.
T in formulaj, TiRepresent the temperature of measurement wall surface point up and down, H2In expression temperature measuring point to channel wall distance (unit：
DEG C), H1Distance (unit for lower temperature measuring point to upper temperature measuring point：℃).
The present embodiment provides a experimental system first passed through before operation priming device 24 inject designated volume heat transferring medium,
After starting magnetic drive pump 1, heat transferring medium passes sequentially through filter 3, spinner flowmeter 6, the heating of liquid inlet temperature control system, changes
Magnetic drive pump 1 is being flowed 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 to adjust the heating power of single-end electrothermal tube 10；Agilent-34970a data collecting instruments
The temperature of the heat transfer experiments section 14 of acquisition is transmitted to industrial control box 17, and shown by computer monitor 18；The high speed
Video camera 21 flows through the Bubble Formation Process of the heat transferring medium of micro-channel evaporator 4-4 in experimental section cavity 14-5 for shooting
Industrial control box 17 is transmitted to, and is shown by computer monitor 18.
Above-described embodiment of the utility model is only intended to clearly illustrate the utility model example, and is not
Restriction to the embodiment of the utility model.For those of ordinary skill in the art, on the basis of above description
On can also make other variations or changes in different ways.There is no necessity and possibility to exhaust all the enbodiments.
All any modification, equivalent and improvement made within the spirit and principles of the present invention etc., should be included in this reality
Within novel scope of the claims.
Claims (10)
1. a kind of additional ultrasound-enhanced complicated micro lubricative pores array microchannel boiling heat transfer experiment system, it is characterised in that：Including
Heating unit 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, the 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 heating unit control system is used to control heat transfer experiments section (14) warm
Degree, the priming device (24) into heat-exchange working medium circulation loop for injecting heat-exchange working medium；The heat transfer experiments section (14)
From top to bottom include sequentially connected upper cover plate (14-1), oscillating plate (14-2), visualization cover board (14-3), micro-channel evaporation
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 on and is upward through several single head heating tubes (10) that insulator goes directly in calandria (14-6), the calandria
Upper and lower two rows of evenly spaced thermometer holes are distributed in (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 in parallel with several rectangle micro-channels along its length, single
A 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：The additional ultrasonic field generating means includes supersonic generator (20), several ultrasonic oscillators (19), institute
The rated power of supersonic generator (20) stated is 800-1500W, and ultrasonic oscillator (19) frequency is 20kHz-
60kHz；The ultrasonic oscillator (19) is uniformly fixed to oscillating plate along its length by welding screw and solidification glue
It is connect on (14-2) and 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 the 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 upper perforated wall of the micro lubricative pores and the angle of the micro-channel bottom surface are more than the micro-channel bottom
The static contact angle θ on surface；Upper opening diameter 0.014mm≤D≤0.67mm of the micro lubricative pores；The depth of the micro lubricative pores
It spends for 0.4mm~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 the micro-channel bottom 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：The heating unit control system includes being sequentially connected the work(of the single head heating tube (10) by circuit
Rate shows table (11), power governor (12), switch cabinet (13), and the 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：The heat-exchange working medium follows bad control system and includes heat-exchange working medium cooling device, hydrodynamic driving device, institute
The hydrodynamic driving device stated includes the magnetic drive pump (1) and frequency converter (2) of circuit connection, the output of the 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 terminal connects
Connect fluid reservoir (27)；The heat-exchange working medium cooling device includes the cooling water tank (25) of pipeline connection and cooling unit (26),
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：The data collecting system include high-speed camera instrument (21), K-type thermocouple (15), data collecting instrument (16),
Industrial control box (17), computer monitor (18), the K-type thermocouple (15) are arranged in the thermometer hole, and pass through circuit according to
Secondary connection data collecting instrument (16), industrial control box (17) and computer monitor (18), the high-speed camera instrument (21) and industrial control box
(17) circuit connects, for acquiring 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：The liquid inlet temperature control system includes accommodating temperature control box, the temperature controller of heat transferring medium
(9), heating rod (7), temperature sensor (8), the 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 several 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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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021189819A1 (en) * | 2020-03-26 | 2021-09-30 | 青岛理工大学 | Test device and method for observing bubble behavior of flow boiling in microchannel |
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2017
- 2017-09-29 CN CN201721270954.XU patent/CN207516288U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021189819A1 (en) * | 2020-03-26 | 2021-09-30 | 青岛理工大学 | Test device and method for observing bubble behavior of flow boiling in microchannel |
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