CN105973044A - Gravity assisted heat pipe device and preparation method - Google Patents
Gravity assisted heat pipe device and preparation method Download PDFInfo
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- CN105973044A CN105973044A CN201610590754.6A CN201610590754A CN105973044A CN 105973044 A CN105973044 A CN 105973044A CN 201610590754 A CN201610590754 A CN 201610590754A CN 105973044 A CN105973044 A CN 105973044A
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- 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
- F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
- F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
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- General Engineering & Computer Science (AREA)
- Lubricants (AREA)
- Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
Abstract
The invention discloses a gravity assisted heat pipe device which comprises an evaporator, a heat insulation segment and a condenser. The evaporator and the condenser are in sealed connection with the heat insulation segment. The inner surface of the evaporator is a super-hydrophilic surface. The inner surface of the condenser is a smooth lubricant implanted porous surface (SLIPS). Lubricant on the SLIPS and a charged working medium cannot be mixed. A super-hydrophilic surface of a nano-micro structure is arranged on the inner wall of the evaporator, the working medium can completely moisten the wall face, a liquid film evaporates in the heating process, the evaporation intensity is improved, and the SLIPS of the condenser is formed by compounding the super-hydrophilic of a nano structure with implanted fluorine-containing lubricant or silicone oil or ionic liquid. Condensed liquid drops float on the SLIPS, are combined, fast fall off the SLIPS and sweep small liquid drops on the path of the condensed liquid drops, a condensation surface is provided for secondary condensation, and the condensation and heat exchange effect is remarkably improved. According to the gravity assisted heat pipe device, heat pipe heat resistance can be effectively reduced, the heat exchange performance of the device is improved, and wide application prospects are achieved.
Description
Technical field
The present invention relates to heat pipe field, particularly relate to a kind of gravity assisted heat pipe device based on biomimetic features surface, be used for
Waste heat recovery, Electronic cooling and heat transportation etc..
Background technology
Heat pipe has been widely used for the various industrial circle such as utilization of energy and refrigeration, the heat pipe evaporation by vaporizer
Quickly the heat of absorption equipment produces steam, then is discharged by the heat of absorption by condensation process within the condenser,
Thus reach the purpose that heat quickly passes from equipment.The condenser of general heat pipe happens is that membranaceous cold
Solidifying, this condensate film sticks on vaporizer wall, and the additional liquid film thermal resistance of generation weakens condensation heat transfer performance.
Therefore, in order to reduce the impact of additional liquid film thermal resistance opposite heat tube heat exchange property, pearl condensation shows improving properties of hot pipe
Obtain particularly important.
Pearl condensation is more more efficient than the heat transfer of film condensation, and pearl condensation not only reduces additional thermal resistance and can also maintain simultaneously
Higher Drop Condensation coring number density, improves condensing heat-exchange ability further, thus reduces heat transfer area, effectively
Cost-effective, there is significant economic benefit.Due to pearl condensation relate to condensing surface modification, droplet formation,
Being polymerized, depart from and update the processes such as condensing surface, will realize these complex processes needs to carry out hydrophobic to condensing surface
Process.
Summary of the invention
Because the deficiencies in the prior art, the technical problem to be solved is to solve high heat flux equipment to change
Heat problem, reduces heat transfer resistance, improves further the exchange capability of heat of heat pipe, it is ensured that equipment properly functioning.
For achieving the above object, the invention provides there is super hydrophilic vaporizer and SLIPS condenser heat pipe, SLIPS
Surface pearl condensation can effectively reduce the thermal resistance of heat pipe, significantly improves the heat-transfer capability of heat pipe, specifically, originally
The technical scheme that invention provides is as follows:
A kind of gravity assisted heat pipe device, including vaporizer, adiabatic section and condenser, vaporizer and condenser respectively with absolutely
Hot arc is tightly connected, and the inner surface of vaporizer is ultra-hydrophilic surface, and the inner surface of condenser is SLIPS surface.
Preferably, gravity assisted heat pipe device also includes the working medium fill port being arranged on side, adiabatic section.
Preferably, the working medium filled is water.
Preferably, it is tightly connected as being connected by thread taper sealing surface.
Preferably, vaporizer and condenser material are copper.
Preferably, ultra-hydrophilic surface is micro-nano compound structure surface；SLIPS surface is micro-nano structure super hydrophobic surface
It is composited by implanting fluorine-containing lubricating oil, silicone oil or ionic liquid.
A kind of vaporizer and the preparation method of condenser, comprise the following steps:
(1) configuration H2O2With HCl mixed solution and NaOH and (NH4)2S2O8Mixed solution；
(2) vaporizer and condenser inner surface being used acetone, ethanol and distilled water ultrasonic cleaning successively, nitrogen dries up
Stand-by；
(3) H that step (1) is configured2O2With in the vaporizer that HCl mixed solution pours step (2) pretreatment into,
Constant temperature etching at a temperature of first, afterwards with distilled water flushing, nitrogen dries up；
(4) NaOH that step (1) is configured and (NH4)2S2O8Mixed solution is poured in the vaporizer that step (3) etches,
Constant temperature etching at the second temperature, afterwards with distilled water flushing, nitrogen dries up, and obtains the super parent of micro-nano compound structure
Water evaporimeter；
(5) NaOH that step (1) is configured and (NH4)2S2O8Mixed solution pours the condenser of step (2) pretreatment into
In, constant temperature etching at a temperature of the 3rd, afterwards with distilled water flushing, nitrogen dries up, then constant temperature at a temperature of the 4th
Baking；
(6) what the ethanol solution of pre-configured tridecafluoro-n-octyltriethoxysilane poured into step (5) obtains is cold
In condenser, soak the very first time under room temperature, constant temperature baking at a temperature of the 5th afterwards, obtain super-hydrophobic condenser；
(7) fluorine-containing lubricating oil, silicone oil or ionic liquid are dropped in super-hydrophobic condenser inner surface prepared by step (6),
After surface is all infiltrated, erect inversion condenser and make unnecessary outflow of lubrication oil condenser, finally obtain
SLIPS condenser.
Preferably, H in step (1)2O2With H in HCl mixed solution2O2Concentration is 0.48wt%, HCl concentration
For 1.89mol/L；NaOH and (NH4)2S2O8In mixed solution, NaOH concentration is 2.5mol/L, (NH4)2S2O8
Concentration is 0.1mol/L.
Preferably, in step (3), the first temperature is 60 DEG C, and constant temperature etch period is 60min；In step (4) second
Temperature is 70 DEG C, and constant temperature etch period is 30min.
Preferably, in step (5), the 3rd temperature is 70 DEG C, and constant temperature etch period is 30min；4th temperature is 180
DEG C, constant temperature baking time is 60min；In step (6), the concentration of tridecafluoro-n-octyltriethoxysilane is 1.0wt%,
The very first time is 12h, and the 5th temperature is 120 DEG C, and constant temperature baking time is 60min.
A kind of gravity assisted heat pipe device that the present invention proposes, vaporizer has ultra-hydrophilic surface, and condenser has
SLIPS surface, pearl condensation reduces condensation thermal resistance, improves heat pipe overall heat exchange ability, therefore this
The heat pipe of bright proposition has bigger application prospect, and its advantage is as follows:
1) compared to conventional articulated gravity heat pipe, this heat pipe can form dropwise condensation in condensation process, in a large number
Drop rapid coring on SLIPS surface is formed, due to the existence of perfluoro polyether oil, and " the drift of these drops
Floating " on SLISP surface without pinning from the teeth outwards, adjacent drops can occur mutual polymerization, by
In SLIPS surface, there is the lowest slide angle, polymerisation of liquid droplets under gravity can along SLIPS surface to
Lower landing, can clean the droplet on landing path during landing, provides for drop coring next time
Condensing surface, along with the increase of heat flow density, the frequency of drop landing also continues to increase, and promotes cold further
Solidifying exchange capability of heat.
2) compared to conventional articulated gravity heat pipe, the super hydrophilic micro-nano compound structure that heat pipe evaporator has has well
Effect of impregnation, working-medium water can the whole evaporator inside surface of moistening rapidly, improve the liquid film evaporation of vaporizer
Ability, owing to liquid film evaporation is strong more than the exchange capability of heat of nucleate boiling, so the heat-energy transducer of super hydrophilic vaporizer
Power improves further.Owing to perfluoro polyether oil is the most immiscible with working-medium water, so ultra-hydrophilic surface exists
Being transformed into superoleophobic surface under water, the perfluoro polyether oil of condensing droplet surface parcel is at super hydrophilic vaporizer
In will not stick on super hydrophilic micro-nano compound structure surface, simultaneously the most again because the boiling of perfluoro polyether oil
Point is higher than the boiling point of water, so perfluoro polyether oil remaining in super hydrophilic vaporizer does not interferes with boiled
Journey.Experiment is tested after terminating 3 months again has good overall heat-transfer capability equally, shows this heat
Pipe has good durability, and therefore, the heat pipe that the present invention proposes can be with a wide range of applications.
Advantages of the present invention:
1, SLIPS vaporizer reduces condensation thermal resistance, significantly improves the condensing heat-exchange ability of heat pipe；
2, there is liquid film evaporation in super hydrophilic vaporizer, reduces evaporation thermal resistance and improves boiling heat transfer ability；
3, the overall heat transfer ability of heat pipe strengthens, and has good durability simultaneously.
Below with reference to accompanying drawing, the method for the present invention and the technique effect of generation are described further, with fully
Solve the purpose of the present invention, feature and effect.
Accompanying drawing explanation
Fig. 1 is the structure principle chart of presently preferred embodiments of the present invention
Fig. 2 is the super hydrophilic vaporizer micro-nano compound structure SEM photograph of presently preferred embodiments of the present invention
Fig. 3 is the SLIPS condenser micro-nano structure SEM photograph of presently preferred embodiments of the present invention
Fig. 4 is the super hydrophilic vaporizer contact angle photo of presently preferred embodiments of the present invention
Fig. 5 is the SLIPS condenser contact angle photo of presently preferred embodiments of the present invention
Fig. 6 is condensing droplet formation, polymerization, sliding and liquid on the SLIPS surface of presently preferred embodiments of the present invention
Drip forming process photo again
Detailed description of the invention
As it is shown in figure 1, the gravity assisted heat pipe dress with super hydrophilic vaporizer and SLIPS condenser that the present invention provides
Put and include: vaporizer 1, adiabatic section 2, condenser 3 and working medium fill port 6.Vaporizer 1 has super hydrophilic table
Face 7, condenser 3 has SLIPS surface 4.Vaporizer 1 and adiabatic section 2 and condenser 3 and adiabatic section 2
Between connected by thread taper sealing surface 5, working medium fill port 6 is arranged on side, adiabatic section 2.Vaporizer 1,
The internal diameter size of adiabatic section 2 and condenser 3 and length are variable, can be adjusted according to practical situation.Evaporation
As long as device 1 and condenser 3 are able to reach super hydrophilic and SLIPS surface.Wherein ultra-hydrophilic surface is
The contact angle surface less than 5 °, SLIPS surface is the smooth porous surface implanting lubricating oil, and contact angle is 100
° between 120 °, slide angle is less than 5 °.In the present embodiment, the feature of ultra-hydrophilic surface is that drop can be fast
Speed is sprawled and is drawn in the micro-nano structure on surface, and contact angle is 0 °；SLIPS surface is that micro-nano structure is super-hydrophobic
Surface is composited by implanting fluorine-containing lubricating oil, silicone oil or ionic liquid, the working medium filled in heat pipe and lubricating oil
Immiscible.In other embodiments, also may be used between vaporizer 1 and adiabatic section 2 and condenser 3 and adiabatic section 2
Connected by other sealing means, as long as can fully seal.
The operation principle of the gravity assisted heat pipe device with super hydrophilic vaporizer and SLIPS condenser that the present invention proposes
For: injecting working-medium water after heat pipe inner chamber evacuation, water is complete wetting evaporator inner wall face in super hydrophilic vaporizer,
After vaporizer is heated, bottom liquid pool generation nucleate boiling, vaporizer upper part generation liquid film evaporation, phase of absorbing heat
Sell of one's property raw saturated vapor to move upward, condense in SLIPS condenser, condensing droplet polymerization edge
The landing of SLIPS surface turns again in vaporizer, cleans the drop on its path during drop landing, for liquid
Drip coring again and offer condensing surface is provided.In SLIPS vaporizer, so it is the formation of stable pearl condensation,
Reduce the additional thermal resistance that condensed fluid brings, improve the heat transfer property of heat pipe further.Will during Drop Condensation
Latent heat of phase change is released to condenser wall, and last heat is taken away by the refrigerating medium of condenser outside wall surface.Working medium is at heat pipe
In periodically evaporation and condensation reach the purpose of efficient heat transfer.
The vaporizer of the present invention and condenser can be selected for red copper vaporizer and copper condenser, include micro-inside vaporizer
The ultra-hydrophilic surface of nano compound structure, has SLIPS surface inside condenser.At red copper vaporizer and condenser
The middle method preparing ultra-hydrophilic surface and SLIPS surface is as follows:
(1) configuration of etching liquid
Respectively by H2O2Add in beaker with HCl and be configured to H2O2Concentration is that 0.48wt%, HCl concentration is
1.89mol/L mixed solution；By NaOH and (NH4)2S2O8Being configured to NaOH concentration is 2.5mol/L,
(NH4)2S2O8Concentration is the mixed solution of 0.1mol/L；
(2) vaporizer and the pretreatment of condenser
Vaporizer and condenser inner surface use acetone, ethanol and distilled water ultrasonic cleaning successively, and nitrogen dries up stand-by；
(3) etching of evaporator inside surface and oxidation processes
The H that step (1) is configured2O2With in the vaporizer that HCl mixed solution pours step (2) pretreatment into, 60 DEG C of perseverances
Temperature etching 60min, afterwards with distilled water flushing, nitrogen dries up；
(4) NaOH that step (1) is configured and (NH4)2S2O8Mixed solution pours the vaporizer that step (3) etches into
In, 70 DEG C of constant temperature etching 30min, afterwards distilled water flushings, nitrogen dries up, and obtains the super parent of micro-nano compound structure
Water evaporimeter (see Fig. 2)；
(5) condenser inner surface oxidation processes
The NaOH that step (1) is configured and (NH4)2S2O8Mixed solution is poured in the condenser of step (2) pretreatment,
70 DEG C of constant temperature etching 30min, afterwards distilled water flushings, nitrogen dries up, then 180 DEG C of constant temperature baking 60min；
(6) the super-hydrophobic self assembly of condenser inner surface
Pour the ethanol solution of the tridecafluoro-n-octyltriethoxysilane that pre-configured concentration is 1.0wt% into step
In the condenser (see Fig. 3) that what (5) obtained suddenly have micro-nano structure copper oxide inner surface, soak 12h under room temperature, afterwards
120 DEG C of constant temperature baking 60min, obtain super-hydrophobic condenser；
(7) prepared by SLIPS condenser
With liquid-transfering gun, perfluoro polyether oil is dropped in super-hydrophobic condenser inner surface prepared by step (6), treat surface
After all being infiltrated by lubricating oil, erect inversion condenser and make unnecessary outflow of lubrication oil condenser, finally obtain
SLIPS condenser.In other embodiments, it is possible to use other fluorine-containing lubricating oils, silicone oil or ionic liquid etc.
Low surface tension oils.
As illustrated in figures 4-5, the contact angle of the super hydrophilic vaporizer that said process obtains is 0 °, and ultra-hydrophilic surface exists
Become under water superoleophobic surface its under water lubricating oil contact angle be 159.5 ° ± 2.9 °, the contact of SLIPS condenser
Angle is 110.2 ° ± 3.5 °, and slide angle is 3.0 ° ± 0.2 °.Fig. 6 shows on the SLIPS surface of the present invention
Condensing droplet formation, polymerization, sliding and drop forming process again.
The preferred embodiment of the present invention described in detail above.Should be appreciated that the ordinary skill of this area without
Creative work just can make many modifications and variations according to the design of the present invention.Therefore, all in the art
Technical staff passes through logical analysis, reasoning, or a limited experiment the most on the basis of existing technology
Available technical scheme, all should be in the protection domain being defined in the patent claims.
Claims (10)
1. a gravity assisted heat pipe device, it is characterised in that include vaporizer, adiabatic section and condenser, described vaporizer
Being tightly connected with described adiabatic section respectively with described condenser, the inner surface of described vaporizer is ultra-hydrophilic surface, institute
The inner surface stating condenser is SLIPS surface.
2. gravity assisted heat pipe device as claimed in claim 1, wherein said gravity assisted heat pipe device also includes being arranged on described
The working medium fill port of side, adiabatic section.
3. gravity assisted heat pipe device as claimed in claim 2, the working medium wherein filled is water.
4. gravity assisted heat pipe device as claimed in claim 1, wherein said is tightly connected as by thread taper sealing surface
Connect.
5. gravity assisted heat pipe device as claimed in claim 1, wherein said vaporizer and described condenser material are copper.
6. gravity assisted heat pipe device as claimed in claim 1, wherein said ultra-hydrophilic surface is micro-nano compound structure surface；
Described SLIPS surface is that micro-nano structure super hydrophobic surface is combined by implanting fluorine-containing lubricating oil, silicone oil or ionic liquid
Form.
7. a vaporizer as claimed in claim 1 and the preparation method of condenser, it is characterised in that include following
Step:
(1) configuration H2O2With HCl mixed solution and NaOH and (NH4)2S2O8Mixed solution；
(2) vaporizer and condenser inner surface being used acetone, ethanol and distilled water ultrasonic cleaning successively, nitrogen dries up
Stand-by；
(3) H that step (1) is configured2O2With in the vaporizer that HCl mixed solution pours step (2) pretreatment into,
Constant temperature etching at a temperature of first, afterwards with distilled water flushing, nitrogen dries up；
(4) NaOH that step (1) is configured and (NH4)2S2O8Mixed solution is poured in the vaporizer that step (3) etches,
Constant temperature etching at the second temperature, afterwards with distilled water flushing, nitrogen dries up, and obtains the super parent of micro-nano compound structure
Water evaporimeter；
(5) NaOH that step (1) is configured and (NH4)2S2O8Mixed solution pours the condenser of step (2) pretreatment into
In, constant temperature etching at a temperature of the 3rd, afterwards with distilled water flushing, nitrogen dries up, then constant temperature at a temperature of the 4th
Baking；
(6) what the ethanol solution of pre-configured tridecafluoro-n-octyltriethoxysilane poured into step (5) obtains is cold
In condenser, soak the very first time under room temperature, constant temperature baking at a temperature of the 5th afterwards, obtain super-hydrophobic condenser；
(7) fluorine-containing lubricating oil, silicone oil or ionic liquid are dropped in super-hydrophobic condenser inner surface prepared by step (6),
After surface is all infiltrated, erect inversion condenser and make unnecessary outflow of lubrication oil condenser, finally obtain
SLIPS condenser.
8. vaporizer as claimed in claim 7 and the preparation method of condenser, wherein H in step (1)2O2And HCl
H in mixed solution2O2Concentration be 0.48wt%, HCl concentration be 1.89mol/L；NaOH and (NH4)2S2O8Mixed
Closing NaOH concentration in solution is 2.5mol/L, (NH4)2S2O8Concentration is 0.1mol/L.
9. vaporizer as claimed in claim 7 and the preparation method of condenser, wherein the first temperature described in step (3)
Being 60 DEG C, constant temperature etch period is 60min；Described in step (4), the second temperature is 70 DEG C, constant temperature etch period
For 30min.
10. vaporizer as claimed in claim 7 and the preparation method of condenser, wherein the 3rd temperature described in step (5)
Degree is 70 DEG C, and constant temperature etch period is 30min；Described 4th temperature is 180 DEG C, and constant temperature baking time is 60min；
Described in step (6), the concentration of tridecafluoro-n-octyltriethoxysilane is 1.0wt%, and the described very first time is 12h,
Described 5th temperature is 120 DEG C, and constant temperature baking time is 60min.
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| CN201610590754.6A CN105973044B (en) | 2016-07-25 | 2016-07-25 | A kind of gravity assisted heat pipe device and preparation method |
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| CN201610590754.6A CN105973044B (en) | 2016-07-25 | 2016-07-25 | A kind of gravity assisted heat pipe device and preparation method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106679473A (en) * | 2016-12-27 | 2017-05-17 | 山东海晶电子科技有限公司 | Double-layer multi-channel panel nano-surface pulsating heat pipe and preparation method thereof |
| CN106767062A (en) * | 2016-12-27 | 2017-05-31 | 山东海晶电子科技有限公司 | The copper-based pulsating heat pipe of Nanosurface |
| CN107191796A (en) * | 2017-06-15 | 2017-09-22 | 华南理工大学 | A kind of great power LED cooling lamp and a kind of preparation method of non-homogeneous wetability patterned surface |
| CN108871022A (en) * | 2018-08-22 | 2018-11-23 | 天津城建大学 | The buried gravity assisted heat pipe of big L/D ratio stage evaporation type |
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| CN106767062A (en) * | 2016-12-27 | 2017-05-31 | 山东海晶电子科技有限公司 | The copper-based pulsating heat pipe of Nanosurface |
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| CN107191796A (en) * | 2017-06-15 | 2017-09-22 | 华南理工大学 | A kind of great power LED cooling lamp and a kind of preparation method of non-homogeneous wetability patterned surface |
| CN107191796B (en) * | 2017-06-15 | 2023-09-19 | 华南理工大学 | High-power LED heat dissipation lamp and preparation method of non-uniform wettability patterned surface |
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| CN110595240A (en) * | 2019-09-02 | 2019-12-20 | 华北电力大学 | Large-scale ring type pulsating heat pipe |
| CN110701931A (en) * | 2019-09-12 | 2020-01-17 | 广州视源电子科技股份有限公司 | Gravity type heat exchanger and preparation method thereof |
| CN112781421A (en) * | 2021-02-04 | 2021-05-11 | 广东机电职业技术学院 | Ultrathin heat pipe with bionic liquid absorption core |
| CN113566636A (en) * | 2021-07-22 | 2021-10-29 | 上海应用技术大学 | SLIPS (slip induced polarization) directional transport heat transfer pipe for enhancing beaded condensation heat exchange and preparation method thereof |
| CN114307201A (en) * | 2022-01-06 | 2022-04-12 | 中南大学 | Liquid energy-saving efficient heating evaporation method, interface material and preparation method |
| CN114539921A (en) * | 2022-01-17 | 2022-05-27 | 上海交通大学 | Evaporator based on super-hydrophilic coating and hydrophobic coating and preparation method and application thereof |
| CN114539921B (en) * | 2022-01-17 | 2022-10-21 | 上海交通大学 | Evaporator based on super-hydrophilic coating and hydrophobic coating and preparation method and application thereof |
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