CN207362116U - Solar energy heat collection pipe - Google Patents
Solar energy heat collection pipe Download PDFInfo
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- CN207362116U CN207362116U CN201720738390.1U CN201720738390U CN207362116U CN 207362116 U CN207362116 U CN 207362116U CN 201720738390 U CN201720738390 U CN 201720738390U CN 207362116 U CN207362116 U CN 207362116U
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- solar energy
- heat collection
- coating
- energy heat
- collection pipe
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- 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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
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Abstract
The utility model is a kind of solar energy heat collection pipe coated with super-hydrophobic wear-resisting graphene composite coating, super-hydrophobic wear-resisting graphene composite coating is formed by curing by graphene oxide and photocatalytic activity nano-particle titanium dioxide composite coating through ultraviolet light, solar energy heat collection pipe includes outer glass tube and is arranged metal inner pipe in the inner, therebetween closed cavity is formed, outer glass tube it is interior, antireflecting coating has been respectively coated in outer wall, above-mentioned super-hydrophobic wear-resisting graphene composite coating is cladded with each antireflecting coating, the physico-chemical properties such as hydrophobicity and translucency by graphene and titanium dioxide itself, so that its solar energy heat collection pipe is coated with wear-resisting, weatherability is strong, translucency is strong, there is the effect of good automatical cleaning ability, erosion of the sand and dust to thermal-collecting tube can effectively be resisted, suitable for the resourceful desert areas of illumination.
Description
Technical field
A kind of wear-resistant automatically cleaning of the utility model on super-hydrophobic wear-resisting graphene composite coating and the application coating
Solar energy heat collection pipe.
Background technology
Using solar light-heat power-generation technology, the silicon wafer opto-electronic conversion technique of costliness is avoided, the sun can be substantially reduced
The cost that can be generated electricity.Solar thermal energy is collected using large scale array parabolic or dish-shaped minute surface, steam, knot are provided by heat-exchanger rig
The technique for closing traditional steam turbine generator, so as to achieve the purpose that power generation.Solar heat power generation system generally comprises four subsystems：
Collecting system, steam generating system, electricity generation system and heat reservoir.Sunlight is gathered on thermal-collecting tube, adds the medium in pipe
Heat, the heat exchange medium being then heated to close to 400 degree make water become steam through heat exchanger, then by superheater to steam into
One step heats, and promotes conventional Turbo-generator Set power generation.Thermal-collecting tube is the core of whole solar heat power generation system, general inner tube
Using metal tube, heat medium is walked in pipe, coating for selective absorption is coated outside metal tube, outside is glass tube, glass tube and gold
Vacuumized between category pipe to suppress convection current and conductive heat loss.
The problem of thermal-collecting tube：(a) according to evacuated collector tube at home and abroad actual working environment experience have shown that, dust storm
It is the most important factor for causing the outer glass tube transmitance of thermal-collecting tube to decay.Since photo-thermal power generation project is typically all to pacify
Mounted in places such as desert, gobi, barren beach, dust dust storm is big, and the impact of long-term sand and dust can cause glass surface to become coarse, cause
Decrease in transmission, is greatly reduced solar energy transfer efficiency.(b) be all outside thermal-collecting tubes glass tube, glass and water contact angle
For 30 °~40 °, so glass is readily formed droplet, and droplet is not easy to slide, and in water drying process, and easily adsorbs
Sand and dust in air, form washmarking after dry, long-term accumulation forms dirt, so as to reduce light transmission, will also reduce the sun
Transformation of energy rate, so must assure that glass surface cleans, otherwise can influence light transmittance and thermal absorptivity, reduce solar energy
Transformation efficiency.
Existing solution：The problem of easily dirty to collector tube glass surface, increase super-hydrophobic coat is a kind of solution party
Case.Super-hydrophobic coat can increase the contact angle of glass and water, the pollutant of body surface（Mainly oil and dust, sand）, wind,
Rain（Water）, snow etc. external force effect descend can voluntarily drop, realize automatically cleaning efficiency.As modified aqueous polyurethane coating can certain journey
Super-hydrophobic ability is realized on degree, but its optical transmittance is about 78% ~ 87%.Fluosilicic with certain transparency is modified poly- methyl
Acrylate also extensive application when preparing hydrophobicity self-cleaning coating.But all there is light transmittance it is relatively low the problem of.
In addition the super-hydrophobic coat containing polyester material there is another problem, weatherability difference and wear-resisting property are poor, for a long time
It is easy to aging under being impacted under the irradiation of sunlight with sand and dust, it is impossible to reach the requirement in more than 20 years service lifes of business solar energy system.Also
There is the prior art to propose to bond one layer of photocatalysis membrana in vacuum tube cover glass tube outer surface（Such as titanium dioxide）Realize to dirt
Decompose, and the self-cleaning purpose of thermal-collecting tube is realized by water leaching.Dismantling-cleaning energy of the optically catalytic TiO 2 technology to organic matter
Power is pretty good, but very weak to the cleaning capacity of sand and dust.From the point of view of the application of commercial thermal-arrest solar energy system, main application region is
In the resourceful desert areas of illumination, it is necessary to there is good cleaning capacity to sand and dust, therefore photocatalysis technology does not reach from clear
Clean efficiency.
The problem of being impacted to collector tube glass intolerant to sand and dust：It is a kind of scheme to increase protection sleeve pipe, but protection sleeve pipe sheet
The impact resistance ability and light transmittance properties of body are poor, cause practicality not strong.
Utility model content
The technical problem that the utility model is solved is providing a kind of super-hydrophobic wear-resisting graphene composite coating and application
The solar energy heat collection pipe of the coating, it has the strong feature of high abrasion, impact resistance, weatherability, can meet business solar energy at the same time
Opto-thermal system realizes efficient running steady in a long-term under sand and dust adverse circumstances.So-called " automatically cleaning ", refers to the dirt of body surface
Thing is contaminated, voluntarily can be dropped or decompose under the effect of the external force such as wind, rain, snow.
Technological means is as described below used by the utility model.
A kind of wear-resistant automatically cleaning solar energy heat collection pipe for including super-hydrophobic wear-resisting graphene composite coating, comprising glass outside
Metal inner pipe in the inner is managed and be arranged, forms closed cavity therebetween, the inside and outside wall of the outer glass tube has been respectively coated
Antireflecting coating, is cladded with super-hydrophobic wear-resisting graphene composite coating, the thickness of composite coating is in 15nm-50nm in each antireflecting coating
Between.
Coating for selective absorption is coated with outside the metal inner pipe.
The both ends of the metal inner pipe and outer glass tube are tightly connected by end cap, bellows and glassy metal sealing ring,
The closed cavity is vacuum cavity.
The antireflecting coating is nano-particle silica, its thickness is 15nm-2000nm, is preferably 20-1000nm.
Technique effect is as follows caused by the utility model.
1st, from the point of view of the application of commercial thermal-arrest solar energy system, main application region is in the resourceful Desert Regions of illumination
Domain is, it is necessary to have sand and dust good cleaning capacity, while can resist erosion of the sand and dust to surface.Therefore super-hydrophobicity graphite is selected
Alkene composite coating, selection bilayer or few layer（3-5 layers）Graphene coating, preferably bilayer graphene, it has very high light transmittance
（>95%）.Graphene has high heat conduction ability at the same time, and Heat transmission or heat reflection to glass will not produce negative impact.Graphite
The high-weatherability and high rigidity of alkene, make its surface have good anti-erosion, resistance to sand and dust to scrape ability.
2nd, ultra-hydrophobicity reduces the dirty of thermal-collecting tube, can largely realize self-cleaning function it is i.e. non-sticky,
Resistance to greasy dirt.Under natural rainwash, because its hydrophobic performance is strong, it is possible to achieve reach dust and voluntarily trickle with rainwater.It can show
The cleaning amount and cleaning water consumption for reducing collector tube glass are write, conversion efficiency of thermoelectric is lifted, realizes groove type solar core
Component collecting system long-term stable operation.
3rd, graphene has ultrahigh hardness, can resist sand and dust and groove type solar core component collecting system surface is invaded
Erosion, protective glass surface, acid and alkali-resistance, weatherability are strong, adapt to adverse circumstances.The addition of nano-titanium dioxide can increase surface
Contact angle, while reduce roll angle, hydrophobic performance is further lifted, titanium dioxide can also be organic by photocatalytic degradation oiliness
Pollutant, so as to fulfill the long-acting self-cleaning function of coating, so as to reach better automatically cleaning effect.
4th, super-hydrophobic wear-resisting graphene composite coating has very strong super-hydrophobic ability, high transparency, high-weatherability, height firmly
The performance of degree.The combined use of the high transparency and anti-reflection function coating of graphene composite coating, can integrate lifting photo-thermal and turn
Efficiency is changed, the performance for keeping thermal-collecting tube to stablize in long-term use.
Brief description of the drawings
Fig. 1 is the thermal-collecting tube structure diagram of the utility model.
Fig. 2 is the glass of the utility model and the schematic cross-section of glass surface coating.
Fig. 3 is the metal inner pipe of the utility model and its schematic cross-section of face coat.
Embodiment
The utility model protects a kind of solar energy heat collection pipe coated with super-hydrophobic wear-resisting graphene composite coating.
The utility model lays special stress on protecting the wear-resistant automatically cleaning solar energy coated with super-hydrophobic wear-resisting graphene composite coating
Thermal-collecting tube, with reference to shown in Fig. 1 and Fig. 2, it includes outer glass tube 4 and is arranged metal inner pipe 7 in the inner, is formed therebetween close
Close vacuum cavity.Antireflecting coating 3 is respectively coated on the inside and outside wall of outer glass tube 4, coated with super thin outside each antireflecting coating 3
The wear-resisting graphene composite coating 2 of water.The both ends of metal inner pipe 7 and outer glass tube 4 pass through end cap 11, bellows 10 and glassy metal
Sealing ring 9 is tightly connected.
Nano-particle silica can be selected in antireflecting coating 3, its thickness is 15nm-2000nm, and preferable thickness is 20-
1000nm。
It is coated with as shown in figure 3, metal inner pipe 7 can be copper pipe or stainless steel tube or copper aluminum composite pipes or aluminum pipe, its surface
Coating for selective absorption 6.
Above-mentioned super-hydrophobic wear-resisting graphene composite coating, forms hydrophobic surface, its weight ratio by titanium dioxide and graphene
1: 5-1:Between 30,1 is preferably controlled in:15, the optional bilayer of graphene or less layer graphene（3-5 layers）, preferred double-layer graphite
Alkene, the thickness of composite coating is between 15nm-50nm, preferably between 20-30nm, light transmittance>95%, the hydrophobic surface and water
The contact angle of drop is between 145 ° -160 °, roll angle of the water droplet in the hydrophobic surface<8°.
Above-mentioned super-hydrophobic wear-resisting graphene composite coating is by graphene oxide and photocatalytic activity nano-particle titanium dioxide
Composite coating is formed through ultraviolet curing, and the method for preparing the raw material is as follows：
A. graphene oxide dispersion is configured：Graphene oxide dispersion, oxygen are prepared in ethanol solution or deionized water
The concentration of graphite alkene is 0.05- 0.5mg/ml, and graphene oxide dispersion is prepared after supersonic oscillations；
B. titanium oxide dispersion is configured：Preparing titanium dioxide dispersion liquid, titanium dioxide in ethanol solution or deionized water
The concentration of titanium is 0.05- 0.5mg/ml, and titanium oxide dispersion is prepared after supersonic oscillations；
C. titanium oxide dispersion and graphene dispersing solution are blended, after ultrasonic oscillation processing, obtain titanium dioxide-
Graphene solution dispersion liquid, its part by weight are titanium dioxide：Graphene=1:5-1:30, it is preferably controlled in 1:15, that is, obtain
Graphene oxide and photocatalytic activity nano-particle titanium dioxide composite coating.
The method that super-hydrophobic wear-resisting graphene composite coating is prepared using the raw material, its preparation process are as follows：
A. precleaning：Glass tube with vacuum is cleaned, cleaning is first boiled using the mixed solution of ammonium hydroxide, hydrogen peroxide and deionized water
Boiling is handled, then boils processing using the mixed solution of hydrochloric acid, hydrogen peroxide and deionized water, finally clean with alcohol flushing；
B. spray：Take the composite coating of graphene oxide and photocatalytic activity nano-particle titanium dioxide add spray gun or
In spraying apparatus or spraying equipment, sprayed or sprayed on glass, jet length 5-8cm, uniformly prepares graphite oxide
Alkenyl coating;
C. cure and reduce：Glass after coating is put into baking oven, it is 55-65 DEG C to adjust oven temperature, dries 30 points
Clock, is irradiated the composite coating on glass with ultraviolet light after drying, and the distance of fluorescent tube and sample is 10-15cm, during irradiation
Between it is small more than 12 when, graphene oxide is reduced to graphene by titanium dioxide, obtains super-hydrophobic wear-resisting graphene composite coating.
The super-hydrophobic wear-resisting graphene composite coating, its matrix are graphene and photocatalytic activity nano-particle titanium dioxide
Titanium.The addition of nano-titanium dioxide can increase the contact angle on surface, while reduce roll angle, further lift hydrophobic performance.
In addition titanium dioxide can also by photocatalytic degradation oiliness organic pollution, so as to fulfill the long-acting self-cleaning function of coating,
So as to reach better automatically cleaning effect.
Claims (6)
1. a kind of solar energy heat collection pipe, it is characterised in that comprising outer glass tube and be arranged metal inner pipe in the inner, therebetween
Closed cavity is formed, the inside and outside wall of the outer glass tube has been respectively coated antireflecting coating, has been cladded with each antireflecting coating super-hydrophobic
Wear-resisting graphene composite coating, the thickness of the composite coating is between 15nm-50nm.
2. solar energy heat collection pipe as claimed in claim 1, it is characterised in that the thickness of the composite coating 20-30nm it
Between.
3. solar energy heat collection pipe as claimed in claim 1, it is characterised in that be coated with selective absorbing outside the metal inner pipe
Coating.
4. solar energy heat collection pipe as claimed in claim 1, it is characterised in that the both ends of the metal inner pipe and outer glass tube lead to
Cross end cap, bellows and glassy metal sealing ring to be tightly connected, the closed cavity is vacuum cavity.
5. solar energy heat collection pipe as claimed in claim 1, it is characterised in that the antireflecting coating is nano-particle titanium dioxide
Silicon, its thickness are 15nm-2000nm.
6. solar energy heat collection pipe as claimed in claim 5, it is characterised in that the antireflecting coating thickness is 20-1000nm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720738390.1U CN207362116U (en) | 2017-06-23 | 2017-06-23 | Solar energy heat collection pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720738390.1U CN207362116U (en) | 2017-06-23 | 2017-06-23 | Solar energy heat collection pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207362116U true CN207362116U (en) | 2018-05-15 |
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ID=62425323
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720738390.1U Active CN207362116U (en) | 2017-06-23 | 2017-06-23 | Solar energy heat collection pipe |
Country Status (1)
| Country | Link |
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| CN (1) | CN207362116U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112197443A (en) * | 2020-10-14 | 2021-01-08 | 镇江市鑫汉太阳能电力有限公司 | Graphene-coated efficient heat collecting tube applied to solar photo-thermal power generation |
| CN114315166A (en) * | 2021-12-17 | 2022-04-12 | 常州龙腾光热科技股份有限公司 | Glass sleeve coating structure of vacuum heat collecting tube and preparation method thereof |
-
2017
- 2017-06-23 CN CN201720738390.1U patent/CN207362116U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112197443A (en) * | 2020-10-14 | 2021-01-08 | 镇江市鑫汉太阳能电力有限公司 | Graphene-coated efficient heat collecting tube applied to solar photo-thermal power generation |
| CN114315166A (en) * | 2021-12-17 | 2022-04-12 | 常州龙腾光热科技股份有限公司 | Glass sleeve coating structure of vacuum heat collecting tube and preparation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 101399 north of wenyuying village, Gaoliying Town, Shunyi District, Beijing Patentee after: Beijing Guoxin Youkong Digital Technology Co.,Ltd. Patentee after: NORTH CHINA DESHENG PROJECT MANAGEMENT (BEIJING) Co.,Ltd. Address before: 100120 NCPE Building, No. 5, Liupukang North Street, Xicheng District, Beijing Patentee before: BEIJING GUOXIN YOUKONG SYSTEM TECHNOLOGY CO.,LTD. Patentee before: NORTH CHINA DESHENG PROJECT MANAGEMENT (BEIJING) Co.,Ltd. |
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| CP03 | Change of name, title or address |