CN114485253B - Intelligent surface heat exchange tube for hydrophilic-hydrophobic conversion - Google Patents
Intelligent surface heat exchange tube for hydrophilic-hydrophobic conversion Download PDFInfo
- Publication number
- CN114485253B CN114485253B CN202210085380.8A CN202210085380A CN114485253B CN 114485253 B CN114485253 B CN 114485253B CN 202210085380 A CN202210085380 A CN 202210085380A CN 114485253 B CN114485253 B CN 114485253B
- Authority
- CN
- China
- Prior art keywords
- heat exchange
- tube
- hydrophobic
- power supply
- intelligent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000006243 chemical reaction Methods 0.000 title abstract description 8
- 125000001165 hydrophobic group Chemical group 0.000 claims abstract description 22
- 239000007788 liquid Substances 0.000 claims description 25
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 12
- 238000009833 condensation Methods 0.000 claims description 12
- 230000005494 condensation Effects 0.000 claims description 12
- 238000009835 boiling Methods 0.000 claims description 9
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 239000010949 copper Substances 0.000 claims description 5
- 230000002209 hydrophobic effect Effects 0.000 claims description 5
- 238000000151 deposition Methods 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 238000000541 cathodic arc deposition Methods 0.000 claims description 3
- 238000007590 electrostatic spraying Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 2
- 238000012546 transfer Methods 0.000 abstract description 17
- 238000000034 method Methods 0.000 abstract description 12
- 230000008569 process Effects 0.000 abstract description 11
- 238000009826 distribution Methods 0.000 abstract description 3
- 230000001105 regulatory effect Effects 0.000 abstract description 3
- 238000012544 monitoring process Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract 1
- 239000012071 phase Substances 0.000 description 9
- 230000005661 hydrophobic surface Effects 0.000 description 8
- 230000008859 change Effects 0.000 description 7
- 230000006911 nucleation Effects 0.000 description 7
- 238000010899 nucleation Methods 0.000 description 7
- 230000005660 hydrophilic surface Effects 0.000 description 5
- 239000007791 liquid phase Substances 0.000 description 4
- 230000007704 transition Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 230000001502 supplementing effect Effects 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000012770 industrial material Substances 0.000 description 1
- 239000008384 inner phase Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 239000012808 vapor phase Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
- F28F13/04—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by preventing the formation of continuous films of condensate on heat-exchange surfaces, e.g. by promoting droplet formation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
- F28D20/02—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using latent heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
- F28F13/18—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by applying coatings, e.g. radiation-absorbing, radiation-reflecting; by surface treatment, e.g. polishing
- F28F13/185—Heat-exchange surfaces provided with microstructures or with porous coatings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
- F28F2013/005—Thermal joints
- F28F2013/008—Variable conductance materials; Thermal switches
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2245/00—Coatings; Surface treatments
- F28F2245/02—Coatings; Surface treatments hydrophilic
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2245/00—Coatings; Surface treatments
- F28F2245/04—Coatings; Surface treatments hydrophobic
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention provides an intelligent surface heat exchange tube for hydrophilic-hydrophobic conversion, wherein the inner surface of a base tube is divided into a spacing area and an intelligent surface area along the circumferential direction, the intelligent surface area sequentially constructs an insulating layer I, a conducting layer, a porous layer and an insulating layer II from the inner wall of the tube, finally hydrophobic groups are sprayed on the insulating layer II in an electrified mode, the conducting layer of each intelligent surface area is connected with different channels of a multi-channel direct-current power supply, a plurality of sections are equally divided outside the base tube, the upper end and the lower end of each section are welded with the temperature of the upper end and the lower end of each thermocouple monitoring section, the temperature is fed back to a computer, the computer adjusts the current of each channel of the multi-channel direct-current power supply, so that the electrified hydrophobic groups move, and the inner surface of the tube is subjected to hydrophilic-hydrophobic conversion in a space-time hierarchy. The invention can realize that the inner surface of the heat exchange tube is changed in wettability according to different flow patterns in the heat exchange process, and the relative distribution in the tube is regulated and controlled, so that the multiphase flow structure and heat transfer are cooperated, and the heat transfer effect is improved.
Description
Technical Field
The invention relates to the technical field of heat exchangers, in particular to an intelligent surface heat exchange tube for hydrophilic-hydrophobic conversion.
Background
The phase change heat transfer is used as a high-efficiency energy transfer mode, is widely applied to various aspects in industrial application and production life, and is divided into condensation heat transfer and boiling heat transfer through dynamic change from nucleation to final detachment of vapor bubble/liquid drop by vapor-liquid phase change.
However, in boiling/condensing heat transfer, as the vapor-liquid phase change process of the heat exchange tube proceeds, the requirements for surface characteristics are different at different stages.
In the condensation heat exchange process, the hydrophilic surface with high surface energy can reduce vapor nucleation energy so as to promote liquid drop nucleation, vapor molecules can be quickly phase-changed from a gas phase main body to form liquid drops in the condensation heat transfer early stage, but as the heat exchange is continuously carried out, the hydrophilic surface forms a continuous liquid film on the surface due to the high surface energy, so that the thermal resistance of a vapor and heat exchange interface is increased, the liquid drops are formed into drop-shaped condensation and quickly fall off due to the hydrophobic surface energy with low surface energy, so that surface condensate is quickly updated, the thermal resistance of the vapor and the heat exchange interface is reduced, and the condensation heat transfer is enhanced.
In the boiling heat exchange process, the hydrophobic surface can nucleate under low superheat degree, which is beneficial to the generation of vapor nuclei. With the continuous heat exchange, the bubbles on the hydrophobic surface are difficult to separate from a large amount of polymerization to enable the solid-liquid boundary to form a gas film, the heat transfer stroke is increased, the heat exchange process is rapidly deteriorated, and the heat transfer process is a main part of the internal thermal resistance of the pipe in the heat transfer process. Meanwhile, the liquid film on the upper tube wall is distributed in a phase manner that the top is thin and the bottom is thick due to the action of gravity, so that the liquid supplementing on the upper tube wall is difficult in the heat exchange process, and when the evaporation rate of liquid drops on the upper tube wall and the liquid supplementing rate can not reach phase equilibrium, the wall is dry and the heat exchange process is deteriorated.
The strengthening of vapor-liquid phase transition is always an important research content in the field of heat transfer, at present, the heat exchange structure in the energy system uses industrial materials (such as copper, aluminum, stainless steel and other metals) and surface strengthening means, and only has single affinity/hydrophobicity, however, the requirements of the vapor-liquid phase transition on surface characteristics at different stages are different, and the dynamic requirement change of the heat exchange process cannot be met to realize the surface affinity/hydrophobicity transition.
Disclosure of Invention
The invention provides an intelligent surface heat exchange tube for hydrophilic-hydrophobic conversion, which aims to solve the problems in the prior art.
The technical scheme of the invention is realized as follows:
the intelligent surface heat exchange tube comprises a conductive end and a base tube, wherein the conductive end is positioned at two ends of the base tube, the inner surface of the base tube is circumferentially divided into a spacing area and an intelligent surface area, the spacing area and the intelligent surface area are multiple on the inner surface of the base tube, the intelligent surface area sequentially constructs an insulating layer I, a conductive layer, a porous layer and an insulating layer II from the inner wall of the tube, and hydrophobic groups are sprayed on the insulating layer II.
Preferably, a spacer is arranged between each intelligent surface area.
Preferably, the first insulating layer and the second insulating layer are made of materials with high thermal conductivity and strong insulativity, and the diamond-like film is prepared by a cathodic arc deposition method or a pulse laser deposition method.
Preferably, the conductive layer is made of metal with good conductivity, preferably copper sheet; sintering a layer of homogeneous copper powder on the surface of the porous layer.
Preferably, the second deposition thickness of the insulating layer is smaller than the particle size of the copper powder and is uniformly deposited on the conductive layer.
Preferably, a layer of uniform positively charged hydrophobic groups is sprayed on the two surfaces of the insulating layer, and the hydrophobic groups are sprayed by adopting electrostatic spraying equipment.
The control system of the intelligent surface heat exchange tube comprises thermocouples, a computer and a multi-channel direct current power supply, wherein conducting layers of all intelligent surface areas are connected with different channels of the multi-channel direct current power supply through conducting ends on a base tube, the outer wall of the base tube is equidistantly divided into a plurality of sections, the upper end and the lower end of each section are welded with the thermocouples, the thermocouples are electrically connected with the multi-channel direct current power supply, and the computer is electrically connected with the multi-channel direct current power supply and regulates current of all channels of the multi-channel direct current power supply.
The beneficial effects of the invention are as follows:
1. the invention constructs the intelligent surface with convertible wettability, which can realize the reversible conversion of space-time level of wettability on the inner surface of the tube by applying an electric field when the heat exchange tube carries out phase change heat transfer;
2. in the condensation heat exchange process, a hydrophilic surface is formed in the early stage to reduce the nucleation energy of vapor so as to promote the nucleation of liquid drops, vapor molecules are quickly phase-changed from a gas phase main body so as to form liquid drops, the surface is gradually changed from the hydrophilic surface to a hydrophobic surface along with the continuous progress of heat exchange, the liquid drops form drop-shaped condensation and quickly fall off, the surface condensate is quickly updated, and the thermal resistance of a vapor-heat exchange interface is reduced so as to strengthen the condensation heat transfer;
3. the invention has the advantages that during boiling heat exchange, the early-stage surface wettability is a hydrophobic surface, the hydrophobic surface can nucleate under the condition of low superheat degree, the generation of steam nuclei is facilitated, along with the continuous proceeding of heat exchange, the in-tube wettability forms a gradient structure from weak to strong from the inner bottom to the top of the tube, the Laplacian pressure at the bottom is larger than the top, so that fluid obtains the driving force of moving from the bottom to the top, the antigravity directional transportation of liquid drops is realized, more liquid can be provided for the wall surface, the replenishment of the liquid on the wall surface is promoted, the wettability of the boiling surface is enhanced, the internal phase distribution in the base tube is regulated, the phenomenon of wall surface dryness is reduced, and the heat transfer efficiency is increased.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a diagram of a control system of the present invention;
FIG. 3 is a schematic cross-sectional view of a base pipe of the present invention;
FIG. 4 is a schematic illustration of the droplet flow of a condensing heat exchange hydrophobic surface in accordance with the present invention;
FIG. 5 is a schematic illustration of boiling heat exchange gradient surface flow according to the present invention;
in the drawings: 1. conductive end, 2, base pipe, 3, interval zone, 4, intelligent surface zone, 401, insulating layer one, 402, conductive layer, 403, porous layer, 404, insulating layer two, 5, thermocouple, 6, computer, 7 multichannel direct current power supply.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1 to 5, an intelligent surface heat exchange tube with hydrophilic-hydrophobic conversion is composed of a conductive end 1 and a base tube 2, wherein the conductive end 1 is positioned at two ends of the base tube 2, the inner surface of the base tube 2 is circumferentially divided into a spacing area 3 and an intelligent surface area 4, the spacing area 3 and the intelligent surface area 4 are all multiple on the inner surface of the base tube 2, the spacing area 3 divides different intelligent surface areas 4, and in general, the spacing area 3 is divided by inserting a separation frame with the same diameter as the base tube 2 into the base tube 2, and fan blades of the separation frame are the spacing area 3.
The intelligent surface area 4 sequentially constructs an insulating layer I401, a conducting layer 402, a porous layer 403 and an insulating layer II 404 from the inner wall of the pipe, and hydrophobic groups are sprayed on the insulating layer II 404.
The first insulating layer 401 and the second insulating layer 404 are made of a material with high thermal conductivity and strong insulativity, and are preferably diamond-like films prepared by cathodic arc deposition or pulse laser deposition.
Conductive layer 402 is made of a metal with good conductivity, preferably a copper sheet; a layer of homogeneous copper powder is sintered on the surface of the porous layer 403, the copper sheet surface of the surface sintered copper powder is placed in different intelligent surface areas 4, one end is sealed, and the other end is pressurized by a hydraulic punching machine, so that the conductive layer 402, the insulating layer one 401 and the wall surface of the base pipe 2 are tightly combined.
Insulating layer two 404 is deposited to a thickness less than the copper powder particle size and uniformly deposited on conductive layer 402. The surface porous structure is not covered, and the porosity of the inner surface of the base pipe 2 is improved.
And spraying a layer of uniform positively charged hydrophobic groups on the surface of the insulating layer II 404, wherein the hydrophobic groups are sprayed by adopting electrostatic spraying equipment.
The utility model provides a control system of intelligent surface heat exchange tube of hydrophilic-hydrophobic interaction, including thermocouple 5, computer 6, multichannel DC power supply 7, conducting layer 402 in each intelligent surface district 4 links to each other with multichannel DC power supply 7's different passageway through conducting end 1 on the base pipe 2, the outer wall equidistance of base pipe 2 divides a plurality of cross-sections, the upper and lower end of every cross-section all welds thermocouple 5 and is used for monitoring the upper and lower end temperature of base pipe 2 cross-section, and feed back this temperature in computer 6, computer 6 still is connected with multichannel DC power supply 7 electricity and adjusts multichannel DC power supply 7 each passageway's electric current, make electrified hydrophobic group take place to remove, make the intraductal surface carry out hydrophilic-hydrophobic interaction at the space-time level.
The working principle of the control system is as follows:
when the base tube 2 performs condensation heat exchange, the power supply of the multichannel direct current power supply 7 just starts to control the channels of the conducting layer 402 at the upper end of the base tube 2 to release current, charged hydrophobic groups are distributed on the upper surface of the base tube, the rest of intelligent surface areas 4 are hydrophilic, the hydrophilic surfaces reduce the nucleation energy of vapor so as to promote nucleation of liquid drops, vapor molecules rapidly change phase from a gas phase main body to form liquid drops, along with continuous heat exchange, the lower wall surface of the cross section is lower than the upper wall surface due to the fact that liquid is gathered on the wall surface under the action of gravity, when the computer 6 monitors that the cross section is greater than 1/2, the computer 6 adjusts all channels of the multichannel direct current power supply 7 to release the same current, so that the charged hydrophobic groups move towards the middle part and the bottom in the base tube 2, the hydrophobic groups are uniformly distributed on the inner wall surface of the base tube 2, the inner wall surface of the base tube 2 is hydrophobic, drop is formed, drop-shaped condensation is formed, the liquid drops rapidly, surface condensate is rapidly updated, the thermal resistance of the vapor and heat exchange interface is reduced, so that condensation heat transfer is enhanced.
When the base tube 2 carries out boiling heat exchange, the multichannel direct current power supply 7 just starts to control each channel to release current, so that each conducting layer 402 is charged, charged hydrophobic groups are uniformly distributed on the inner surface of the base tube 2, the inner wall surface of the base tube 2 forms a hydrophobic structure, the hydrophobic surface can nucleate under low superheat degree, the generation of vapor nuclei is facilitated, the vapor phase in the tube gradually increases along with the continuous progress of heat exchange, the upper wall surface dries up, the temperature of the upper wall surface is higher than that of the lower wall surface, when the computer 6 monitors that the section of the multichannel direct current power supply 7 is higher than 1/2, the computer 6 adjusts the currents of each channel of the multichannel direct current power supply 7, so that the charged hydrophobic groups move towards the middle part and the bottom of the inner wall surface of the base tube 2, the wettability of the wall surface from the bottom to the top forms a gradient surface from the hydrophobic to the hydrophilic, the antigravity directional transportation of liquid drops is realized, more liquid can be provided for the wall surface, the supplement of the liquid on the wall surface is promoted, the wettability of the boiling surface is enhanced, the inner phase distribution in the base tube is regulated, the wall surface dries up phenomenon is reduced, the wall surface is increased, and the efficiency is improved.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (6)
1. The intelligent surface heat exchange tube is characterized by comprising a conductive end (1) and a base tube (2), wherein the conductive end (1) is positioned at two ends of the base tube (2), the inner surface of the base tube (2) is circumferentially divided into a spacing area (3) and an intelligent surface area (4), the spacing area (3) and the intelligent surface area (4) are multiple on the inner surface of the base tube (2), the intelligent surface area (4) sequentially constructs an insulating layer I (401), a conductive layer (402), a porous layer (403) and an insulating layer II (404) from the inner wall of the tube, and hydrophobic groups are sprayed on the insulating layer II (404);
the heat exchange tube is controlled by a control system, the control system further comprises thermocouples (5), a computer (6) and a multi-channel direct current power supply (7), the conducting layers (402) of each intelligent surface area (4) are connected with different channels of the multi-channel direct current power supply (7) through conducting ends (1) on the base tube (2), the outer wall of the base tube (2) is equidistantly divided into a plurality of sections, the upper end and the lower end of each section are welded with the thermocouples (5), the thermocouples (5) are electrically connected with the computer (6), and the computer (6) is electrically connected with the multi-channel direct current power supply (7) and regulates current of each channel of the multi-channel direct current power supply (7);
under the control of the control system, when the base pipe (2) of the heat exchange pipe performs condensation heat exchange, the power supply of the multichannel direct current power supply (7) just starts to control the channels of the upper end conducting layer (402) of the base pipe (2) to release current, charged hydrophobic groups are distributed on the upper surface of the base pipe (2), other intelligent surface areas (4) are hydrophilic, and steam molecules are changed into liquid to be gathered on the lower wall surface of the base pipe (2); when the computer (6) monitors that the liquid gathered on the surface of the lower wall surface of the base pipe (2) is larger than 1/2 of the cross section of the base pipe (2), the computer (6) adjusts all channels of the multi-channel direct current power supply (7) to release the same current, so that charged hydrophobic groups move towards the middle part and the bottom in the base pipe (2), the hydrophobic groups are uniformly distributed on the inner wall surface of the base pipe (2), and the inner wall surface of the base pipe (2) is hydrophobic;
under control of the control system, when the base tube (2) of the heat exchange tube carries out boiling heat exchange, the multichannel direct current power supply 7 just starts to control each channel to release current, so that each conducting layer (402) is electrified, electrified hydrophobic groups are uniformly distributed on the inner surface of the base tube (2), the inner surface of the base tube (2) forms a hydrophobic structure, the upper wall surface of the base tube (2) is dried to form a dried surface, when the computer (6) monitors the condition that the dried surface of the base tube (2) is larger than the section of 1/2, the computer (6) adjusts each channel current of the multichannel direct current power supply (7) to enable the electrified hydrophobic groups to move towards the middle part and the bottom of the inner wall surface of the base tube (2).
2. The hydrophilic-hydrophobic switching intelligent surface heat exchange tube according to claim 1, wherein: a spacing area (3) is arranged between each two intelligent surface areas (4).
3. The hydrophilic-hydrophobic switching intelligent surface heat exchange tube according to claim 1, wherein: the first insulating layer (401) and the second insulating layer (404) are made of materials with high thermal conductivity and strong insulativity, and are preferably diamond-like films prepared by a cathodic arc deposition or pulse laser deposition method.
4. The hydrophilic-hydrophobic switching intelligent surface heat exchange tube according to claim 1, wherein: the conductive layer (402) is made of metal with good conductivity, preferably copper sheet; a layer of homogenous copper powder is sintered on the surface of the porous layer (403).
5. The hydrophilic-hydrophobic switching intelligent surface heat exchange tube according to claim 1, wherein: insulating layer two (404) is deposited to a thickness less than the copper powder particle size and uniformly deposited over conductive layer (402).
6. The hydrophilic-hydrophobic switching intelligent surface heat exchange tube according to claim 1, wherein: and spraying a layer of uniform positively charged hydrophobic groups on the surface of the insulating layer II (404), wherein the hydrophobic groups are sprayed by adopting electrostatic spraying equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210085380.8A CN114485253B (en) | 2022-01-25 | 2022-01-25 | Intelligent surface heat exchange tube for hydrophilic-hydrophobic conversion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210085380.8A CN114485253B (en) | 2022-01-25 | 2022-01-25 | Intelligent surface heat exchange tube for hydrophilic-hydrophobic conversion |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114485253A CN114485253A (en) | 2022-05-13 |
| CN114485253B true CN114485253B (en) | 2024-01-26 |
Family
ID=81473760
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210085380.8A Active CN114485253B (en) | 2022-01-25 | 2022-01-25 | Intelligent surface heat exchange tube for hydrophilic-hydrophobic conversion |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114485253B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4982782A (en) * | 1986-07-09 | 1991-01-08 | Walter F. Albers | Method and apparatus for simultaneous heat and mass transfer |
| WO2011029917A1 (en) * | 2009-09-14 | 2011-03-17 | Commissariat à l'énergie atomique et aux énergies alternatives | Heat exchange device with improved efficiency |
| CN103562667A (en) * | 2011-05-31 | 2014-02-05 | 大金工业株式会社 | Heat exchanger fin, heat exchanger and air-conditioning device |
| CN103702928A (en) * | 2011-07-21 | 2014-04-02 | 浦项工科大学校产学协力团 | Method for processing super-hydrophobic surface, and evaporator having super-hydrophobic surface |
| CN106855374A (en) * | 2016-11-16 | 2017-06-16 | 华南师范大学 | A kind of active strengthening and heat transferring device and heat-transferring method |
| CN109631651A (en) * | 2018-12-06 | 2019-04-16 | 华北电力大学 | A kind of local auto-adaptive controllable immersing coupling micro-structure enhanced boiling heat transfer method |
| CN110455111A (en) * | 2019-08-22 | 2019-11-15 | 华南师范大学 | A kind of active strengthening and heat transferring device and active intensified heat transfer method |
| CN111207619A (en) * | 2020-01-15 | 2020-05-29 | 郑州轻工业大学 | Efficient boiling reinforced heat exchange tube and manufacturing method thereof |
| CN113776377A (en) * | 2021-09-30 | 2021-12-10 | 郑州轻工业大学 | Boiling enhanced evaporation heat exchange tube and manufacturing device and manufacturing method thereof |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2950134B1 (en) * | 2009-09-14 | 2011-12-09 | Commissariat Energie Atomique | THERMAL EXCHANGE DEVICE WITH ENHANCED CONVECTIVE BOILING AND IMPROVED EFFICIENCY |
| US10739089B2 (en) * | 2014-03-27 | 2020-08-11 | Massachusetts Institute Of Technology | Bi-directional porous media phase change heat exchanger |
| US20170010060A1 (en) * | 2015-07-06 | 2017-01-12 | Chih-Hung Chang | Heterogeneous surfaces for patterned bubble arrays, enhanced heat transfer, & advanced heat exhanger applications |
| US10197342B2 (en) * | 2016-06-24 | 2019-02-05 | Hamilton Sundstrand Corporation | Heat exchanger system and method of operation |
-
2022
- 2022-01-25 CN CN202210085380.8A patent/CN114485253B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4982782A (en) * | 1986-07-09 | 1991-01-08 | Walter F. Albers | Method and apparatus for simultaneous heat and mass transfer |
| WO2011029917A1 (en) * | 2009-09-14 | 2011-03-17 | Commissariat à l'énergie atomique et aux énergies alternatives | Heat exchange device with improved efficiency |
| CN103562667A (en) * | 2011-05-31 | 2014-02-05 | 大金工业株式会社 | Heat exchanger fin, heat exchanger and air-conditioning device |
| CN103702928A (en) * | 2011-07-21 | 2014-04-02 | 浦项工科大学校产学协力团 | Method for processing super-hydrophobic surface, and evaporator having super-hydrophobic surface |
| CN106855374A (en) * | 2016-11-16 | 2017-06-16 | 华南师范大学 | A kind of active strengthening and heat transferring device and heat-transferring method |
| CN109631651A (en) * | 2018-12-06 | 2019-04-16 | 华北电力大学 | A kind of local auto-adaptive controllable immersing coupling micro-structure enhanced boiling heat transfer method |
| CN110455111A (en) * | 2019-08-22 | 2019-11-15 | 华南师范大学 | A kind of active strengthening and heat transferring device and active intensified heat transfer method |
| CN111207619A (en) * | 2020-01-15 | 2020-05-29 | 郑州轻工业大学 | Efficient boiling reinforced heat exchange tube and manufacturing method thereof |
| CN113776377A (en) * | 2021-09-30 | 2021-12-10 | 郑州轻工业大学 | Boiling enhanced evaporation heat exchange tube and manufacturing device and manufacturing method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 亲疏水表面相变传热的智能调控研究;张晶;博士学位论文;第五章 * |
| 超亲水/超疏水匹配超薄热管的传热特性;刘昌泉;徐进良;纪献兵;;化工进展(第06期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114485253A (en) | 2022-05-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Das et al. | Experimental study of nucleate pool boiling heat transfer of water by surface functionalization with SiO2 nanostructure | |
| Li et al. | Comparison study of liquid replenishing impacts on critical heat flux and heat transfer coefficient of nucleate pool boiling on multiscale modulated porous structures | |
| Sarwar et al. | Subcooled flow boiling CHF enhancement with porous surface coatings | |
| CA1105557A (en) | Thermoelectric generator devices and methods | |
| Chen et al. | Thermal performance enhancement of micro-grooved aluminum flat plate heat pipes applied in solar collectors | |
| CN110629168B (en) | Evaporation device of vacuum coating machine | |
| CN104584303B (en) | Flow-field plate for fuel cell | |
| CN110425918A (en) | A kind of ultrathin flexible flat-plate heat pipe | |
| US5195578A (en) | Method of and an apparatus for trickling film heat exchange | |
| CN104477892A (en) | Preparation method of flake graphene and flake graphene device prepared by same | |
| CN109631651B (en) | Local self-adaptive controllable wettability coupling microstructure enhanced boiling heat exchange method | |
| CN114485253B (en) | Intelligent surface heat exchange tube for hydrophilic-hydrophobic conversion | |
| CN102923656A (en) | Laminating type micro-convex-table array type micro-reactor for steam reforming of methanol | |
| CN110492059A (en) | Preparation method of lithium ion battery equipped with high heat dissipation pole piece | |
| CN109768020A (en) | A kind of novel microchannel cold plates | |
| CN201550302U (en) | PTC heater for heating fluid | |
| CN114593630B (en) | Nano magnetic particle hydrophilic-hydrophobic intelligent tube and control system thereof | |
| EP1066492B1 (en) | Electro-hydrodynamic heat exchanger | |
| US20120060371A1 (en) | Method for manufacturing two-phase flow heat sink | |
| Cheng et al. | Experimental studies on boiling heat transfer and friction characteristics in evaporator with double-layer micro/nano porous wick | |
| CN211060227U (en) | Graphite alkene radiator unit and graphite alkene electric heater | |
| CN114264178B (en) | Loop heat pipe capable of automatically adjusting aperture | |
| CN109546260A (en) | A kind of novel thermal transfer devices using heat pipe-PCM coupling thermal management technology | |
| CN202002204U (en) | Electromagnetic heat superconduction heating system | |
| CN111933592B (en) | Electronic device heat dissipation structure with three-dimensional net structure and manufacturing method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |