CN201273736Y - Solar energy heat collecting tube - Google Patents
Solar energy heat collecting tube Download PDFInfo
- Publication number
- CN201273736Y CN201273736Y CNU2008201328776U CN200820132877U CN201273736Y CN 201273736 Y CN201273736 Y CN 201273736Y CN U2008201328776 U CNU2008201328776 U CN U2008201328776U CN 200820132877 U CN200820132877 U CN 200820132877U CN 201273736 Y CN201273736 Y CN 201273736Y
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- CN
- China
- Prior art keywords
- layer
- reflection layer
- inner tube
- glass
- solar energy
- 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.)
- Expired - Fee Related
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S10/00—Solar heat collectors using working fluids
- F24S10/40—Solar heat collectors using working fluids in absorbing elements surrounded by transparent enclosures, e.g. evacuated solar collectors
- F24S10/45—Solar heat collectors using working fluids in absorbing elements surrounded by transparent enclosures, e.g. evacuated solar collectors the enclosure being cylindrical
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S70/00—Details of absorbing elements
- F24S70/20—Details of absorbing elements characterised by absorbing coatings; characterised by surface treatment for increasing absorption
- F24S70/225—Details of absorbing elements characterised by absorbing coatings; characterised by surface treatment for increasing absorption for spectrally selective absorption
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S70/00—Details of absorbing elements
- F24S70/30—Auxiliary coatings, e.g. anti-reflective coatings
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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
- Y02E10/44—Heat exchange systems
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Laminated Bodies (AREA)
Abstract
The utility model relates to a solar collector tube, which comprises a glass inner tube and a glass outer tube which is jacketed outside the glass inner tube. A vacuum chamber is arranged between the glass inner tube and the glass outer tube; the outer surface of the glass inner tube is provided with an infrared reflecting layer, a selective absorbing layer, an inner anti-reflection layer and an outer anti-reflection layer in sequence from the inside to the outside; the selective absorbing layer is a composite metallic ceramic layer containing nickel-chromium metal clusters; the inner anti-reflection layer is an amorphous state film layer containing carbon and hydrogen; the outer anti-reflection layer is an aluminum oxide film layer; and the coatings are dark green. The panchromatic absorption rate of the utility model to the solar spectrum, alpha, is more than or equal to 94 percent; the total emissivity thereof, epsilon, is less than or equal to 4.5 percent; and the utility model can be used at the temperature above 400 DEG C throughout the year.
Description
Technical field
The utility model relates to a kind of solar energy heat collection pipe, and this solar energy heat collection pipe has composite cermet layer and two anti-reflection layer.
Background technology
Existing solar energy heat collection pipe can be divided into two kinds of low temperature and middle high temperature, the effective absorber coatings of most of commercial solar energy heating on the market mostly is the low form product, and its coating structure is: with copper or aluminium be the reflecting layer, with the composite cermet film of embedding aluminum metal cluster in aluminium nitride as absorbed layer, with aluminium nitride film as antireflection layer.Because the fusing point of aluminium is lower, its metal cluster is having the tendency of homogenising under the high-temperature condition slightly, thereby loses the ability that solar selectively is absorbed, and therefore generally can only use below 150 degrees centigrade.In order to address the above problem, Chinese patent 200420115684.1 discloses a kind of new coating, the solar selectively absorbing coating that this solar energy heat collection pipe stacks gradually on matrix is formed, this solar selectively absorbing coating is made up of the titanium nitride composite cermet layer of aluminium or copper reflecting layer, embedding infusibility titanium alloy metal cluster and aluminium nitride or titanium nitride antireflection layer, adopt magnetron sputtering technique successively coated on glass inner tube as coated substrate.The coating of this utility model has the selection absorption characteristic to the solar spectrum excellence, and Heat stability is good is to panchromatic absorptivity 〉=94% of solar spectrum; Black matrix total emissivity≤6%; Discoloring temperature is greater than 300 ℃.But the metal material that this coating is selected is rare precious metal, has limited promoting the use of of high performance middle high temperature modification solar energy heat collection pipe.Therefore, be necessary to provide a kind of novel solar energy heat collection pipe to address the above problem.
Summary of the invention
The purpose of this utility model is to provide a kind of solar energy heat collection pipe, and infrared reflecting layer, composite cermet layer, two anti-reflection layer are set on the glass inner tube outer surface of this solar energy heat collection pipe; Have higher absorptivity and lower emissivity and heat-resisting ability.
The purpose of this utility model is realized by following technical proposals: a kind of solar energy heat collection pipe, comprise a glass inner tube and the glass outer tube that is sleeved on the glass inner tube, be provided with vacuum chamber between glass inner tube and the glass outer tube, set gradually infrared reflecting layer, selectively absorbing layers, interior anti-reflection layer and outer anti-reflection layer on the described glass inner tube outer surface from inside to outside; Described selectively absorbing layers is the composite cermet layer that includes the nickel chromium triangle metal cluster; Anti-reflection layer is an amorphous state carbon containing hydrogen thin layer in described; Described outer anti-reflection layer is the aluminum oxide film rete.
Compared with the prior art the utility model has following advantage:
1, because selectively absorbing layers of the present utility model adopts the preparation of nichrome target, the effect that this composite cermet layer is fabulous to being absorbed with of solar energy has excellent heat-resisting ability, and cheap.
2, because thermal-collecting tube of the present utility model is provided with interior anti-reflection layer and outer anti-reflection layer, two anti-reflection layers have extremely low emission to compare performance to solar spectrum.
3, solar energy heat collection pipe of the present utility model is to panchromatic absorptivity α 〉=94% of solar spectrum, total emissivity ε≤4.5%, and coating is anti-aging, and hot property is stable, can use being higher than under 400 ℃ the temperature.
4, the thermal-collecting tube coating in the utility model can adopt conventional magnetron sputtering technique to realize, is convenient to the large-scale production and the popularization of product.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples.
Fig. 1 is structural representation of the present utility model (cutaway view)
Fig. 2 is a glass inner tube structural representation of the present utility model
The specific embodiment
Embodiment one:
Referring to Fig. 1, solar energy heat collection pipe of the present utility model comprises a glass inner tube 2 and the glass outer tube 1 that is sleeved on the glass inner tube, is provided with vacuum chamber 3 between glass inner tube and the glass outer tube, and glass inner tube and glass outer tube can adopt the coaxial manner setting.Referring to Fig. 2, (Fig. 2 is the cross section view of Fig. 1, only show glass inner tube and coating structure, do not show the glass outer tube) set gradually infrared reflecting layer 4, selectively absorbing layers 5, interior anti-reflection layer 6 and outer anti-reflection layer 7 from inside to outside on the described glass inner tube outer surface; Described selectively absorbing layers is the composite cermet layer that includes the nickel chromium triangle metal cluster; Anti-reflection layer is an amorphous state carbon containing hydrogen thin layer in described; Described outer anti-reflection layer is the aluminum oxide film rete.
In the present embodiment, infrared reflecting layer, selectively absorbing layers, interior anti-reflection layer and outer anti-reflection layer are to use magnetron sputtering apparatus to adopt magnetically controlled sputter method deposit formation on the glass inner tube outer surface; Described setting gradually from inside to outside is meant that four coatings successively cover setting from inside to outside.Described magnetron sputtering apparatus is the equipment in the prior art.Can also be with reference to Chinese patent 200610083743.5 disclosed solar energy heat-collecting pipe vacuum magnetic-control sputtering continuous plating line systems.
In the present embodiment, described infrared reflecting layer is made of copper material, when sputtering target adopts copper (Cu) target, just forms copper infrared reflecting layer on the glass inner tube outer surface.This reflecting layer also can be called infrared high reflection layer, and the thickness of this infrared reflecting layer is 100～140 nanometers, and optimum thickness is 140 nanometers.
In the present embodiment, described infrared reflecting layer can also be made of aluminum material, when sputtering target adopts aluminium (Al) target, just forms aluminium matter infrared reflecting layer on the glass inner tube outer surface, and the thickness of this infrared reflecting layer is≤140 nanometers.
In the present embodiment, described selectively absorbing layers is the composite cermet layer that includes the nickel chromium triangle metal cluster, this absorbed layer also can be expressed as SS-C composite cermet layer, this absorbed layer is when sputtering target adopts nichrome (Ni-Cr) target, deposition forms on the glass inner tube outer surface, the thickness of this absorbed layer is 60～70 nanometers, and optimum thickness is 70 nanometers.This absorbed layer has good spectral selection, for absorbing solar energy fabulous effect is arranged.
In the present embodiment, described in anti-reflection layer be amorphous state carbon containing hydrogen thin layer, this anti-reflection layer also can be expressed as metal-free amorphous state and contain the Soft Hydrogenated Amorphous Carbon Films (anti-reflection layer of α-C:H).This anti-reflection layer optical transmission is good, and sunshine can be passed through smoothly, to reduce the reflection of solar energy heat collection pipe to sunlight.Should interior anti-reflection layer thickness be 30～40 nanometers, optimum thickness be 40 nanometers.
Outer anti-reflection layer described in the present embodiment is by aluminum oxide film (Al
2O
3) constitute, this outer anti-reflection layer thickness is 20～30 nanometers, optimum thickness is 20 nanometers.
In the present embodiment, the appearance of coat color on the glass inner tube outer surface is blackish green deeply.
When the medium in the thermal-collecting tube of the present utility model adopted conduction oil, thermal-collecting tube can use being higher than under 400 ℃ the temperature.
Claims (4)
1, a kind of solar energy heat collection pipe, comprise a glass inner tube and the glass outer tube that is sleeved on the glass inner tube, be provided with vacuum chamber between glass inner tube and the glass outer tube, it is characterized in that: set gradually infrared reflecting layer, selectively absorbing layers, interior anti-reflection layer and outer anti-reflection layer on the described glass inner tube outer surface from inside to outside; Described selectively absorbing layers is the composite cermet layer that includes the nickel chromium triangle metal cluster; Anti-reflection layer is an amorphous state carbon containing hydrogen thin layer in described; Described outer anti-reflection layer is the aluminum oxide film rete.
2, solar energy heat collection pipe according to claim 1 is characterized in that: the thickness of described infrared reflecting layer is 100～140 nanometers; The thickness of described selectively absorbing layers is 60～70 nanometers; Anti-reflection layer thickness is 30～40 nanometers in described; Described outer anti-reflection layer thickness is 20～30 nanometers.
3, solar energy heat collection pipe according to claim 2 is characterized in that: described infrared reflecting layer is made of copper material.
4, solar energy heat collection pipe according to claim 2 is characterized in that: described selection absorbed layer is made of aluminum material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201328776U CN201273736Y (en) | 2008-08-11 | 2008-08-11 | Solar energy heat collecting tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201328776U CN201273736Y (en) | 2008-08-11 | 2008-08-11 | Solar energy heat collecting tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201273736Y true CN201273736Y (en) | 2009-07-15 |
Family
ID=40884083
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201328776U Expired - Fee Related CN201273736Y (en) | 2008-08-11 | 2008-08-11 | Solar energy heat collecting tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201273736Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101922816A (en) * | 2010-07-14 | 2010-12-22 | 北京航空航天大学 | Solar selective absorbing coating and preparation method thereof |
| CN101876490B (en) * | 2009-12-25 | 2012-10-10 | 四川中科百博太阳能科技有限公司 | Solar energy medium-high temperature selective heat absorbing coating |
| CN106123374A (en) * | 2016-06-29 | 2016-11-16 | 芜湖市万里达新能源有限公司 | A kind of solar energy heat collection pipe and preparation method thereof |
| CN109385128A (en) * | 2018-08-31 | 2019-02-26 | 江苏京展能源科技有限公司 | A kind of solar energy vacuum tube special absorptive coating and preparation method thereof |
| CN108645061B (en) * | 2018-03-15 | 2020-07-28 | 兰州交大常州研究院有限公司 | Multilayer composite solar spectrum selective absorption coating and preparation method thereof |
-
2008
- 2008-08-11 CN CNU2008201328776U patent/CN201273736Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101876490B (en) * | 2009-12-25 | 2012-10-10 | 四川中科百博太阳能科技有限公司 | Solar energy medium-high temperature selective heat absorbing coating |
| CN101922816A (en) * | 2010-07-14 | 2010-12-22 | 北京航空航天大学 | Solar selective absorbing coating and preparation method thereof |
| CN101922816B (en) * | 2010-07-14 | 2012-07-18 | 北京航空航天大学 | Solar selective absorbing coating and preparation method thereof |
| CN106123374A (en) * | 2016-06-29 | 2016-11-16 | 芜湖市万里达新能源有限公司 | A kind of solar energy heat collection pipe and preparation method thereof |
| CN108645061B (en) * | 2018-03-15 | 2020-07-28 | 兰州交大常州研究院有限公司 | Multilayer composite solar spectrum selective absorption coating and preparation method thereof |
| CN109385128A (en) * | 2018-08-31 | 2019-02-26 | 江苏京展能源科技有限公司 | A kind of solar energy vacuum tube special absorptive coating and preparation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090715 Termination date: 20130811 |