CN101886847B - Medium-high temperature solar thermal collector tube - Google Patents
Medium-high temperature solar thermal collector tube Download PDFInfo
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- CN101886847B CN101886847B CN2009100837655A CN200910083765A CN101886847B CN 101886847 B CN101886847 B CN 101886847B CN 2009100837655 A CN2009100837655 A CN 2009100837655A CN 200910083765 A CN200910083765 A CN 200910083765A CN 101886847 B CN101886847 B CN 101886847B
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- layer
- nitrogen
- aluminum
- reflection layer
- oxygen
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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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- 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)
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- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Thermal Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Laminated Bodies (AREA)
- Surface Treatment Of Glass (AREA)
Abstract
The invention relates to a medium-high temperature solar thermal collector tube, which comprises an inner glass tube, an outer glass tube sleeved on the inner glass tube, and a vacuum chamber arranged between the inner and outer glass tubes. The medium-high temperature solar thermal collector tube is characterized in that: an infrared reflecting layer, a selective absorption layer, an inner anti-reflection layer and an outer anti-reflection layer are sequentially arranged on the outer surface of the inner glass tube inside out, wherein the selective absorption layer is a composite metal-ceramic layer with nickel-chromium aluminum metal clusters; the inner anti-reflection layer is a thin film layer with aluminum-nitrogen, aluminum oxide and aluminum-nitrogen-oxygen-containing clusters; the outer anti-reflection layer is the thin film layer with the aluminum-nitrogen, aluminum oxide and aluminum-nitrogen-oxygen-containing clusters; and a coating is dark green. The solar thermal collector tube of the invention has the full-color absorption rate alpha of more than or equal to 94 percent and the total emissivity epsilon of less than or equal to 5 percent on solar spectrums, and can be used at the temperature of above 400 DEG C throughout the year.
Description
Technical field
The present invention relates to a kind of middle high-temperature solar thermal-collecting tube, this solar energy heat collection pipe has composite cermet layer and two anti-reflection layers.
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 200420l15684.1 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 object of the present invention is to provide a kind of middle high-temperature solar thermal-collecting tube, 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 objective of the invention is to realize: high-temperature solar thermal-collecting tube in a kind of by following technical proposals, 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 nickel chromium triangle aluminum metal cluster; Anti-reflection layer is the thin layer that includes aluminium nitrogen+alundum (Al+aluminum-nitrogen-oxygen cluster in described; Described outer anti-reflection layer is the thin layer that includes aluminium nitrogen+alundum (Al+aluminum-nitrogen-oxygen cluster.
Compared with the prior art the present invention has following advantage:
1, because selectively absorbing layers of the present invention adopts the preparation of nichrome target, adopt cheap aluminium, nickel, evanohm+nitrogen, oxygen to form the composite cermet film, the effect that this composite cermet layer is fabulous to being absorbed with of solar energy has excellent heat-resisting ability.
2, because thermal-collecting tube of the present invention 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 invention is 92-95% to the panchromatic absorptivity of solar spectrum, and total emissivity is≤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 among the present invention can adopt conventional magnetron sputtering technique to realize, is convenient to the large-scale production and the popularization of product.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples.
Fig. 1 is structural representation of the present invention (cutaway view)
Fig. 2 is a glass inner tube structural representation of the present invention
The specific embodiment
Embodiment one:
Referring to Fig. 1, solar energy heat collection pipe of the present invention 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 nickel chromium triangle aluminum metal cluster; Anti-reflection layer is the thin layer that includes aluminium nitrogen+alundum (Al+aluminum-nitrogen-oxygen cluster in described; Described outer anti-reflection layer is the thin layer that includes aluminium nitrogen+alundum (Al+aluminum-nitrogen-oxygen cluster.
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 90～140 nanometers, perhaps is not less than 90 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, and the thickness of this absorbed layer is 80～200 nanometers.This absorbed layer has good spectral selection, for absorbing solar energy fabulous effect is arranged.
In the present embodiment, described selectively absorbing layers can also be the absorbed layer that comprises aluminium nitrogen+aluminum-nitrogen-oxygen+chromium nitrogen+chromium nitrogen oxygen+nickel nitrogen+nickel nitrogen oxygen+aluminum-nickel-chromium cluster, and the composite cermet layer also can be expressed as AlN+NiN+CrN+Al
2O
3+ NiO+CrO+AlNO+NiNO+CrNO ceramic layer.
In the present embodiment, described interior anti-reflection layer is metal-free thin layer, comprises AlN+AlNO+Al in this thin layer
2O
3Cluster.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 20～50 nanometers, optimum thickness be 40 nanometers.
In the present embodiment, described outer anti-reflection layer is metal-free thin layer, comprises AlN+AlNO+Al in this thin layer
2O
3Cluster.Outer anti-reflection layer thickness is 20～50 nanometers, and 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 invention adopted conduction oil, thermal-collecting tube can use not being higher than under 400 ℃ the temperature.
Claims (5)
1. high-temperature solar thermal-collecting tube in a kind, 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 nickel chromium triangle aluminum metal cluster; Anti-reflection layer is the thin layer that includes aluminium nitrogen+alundum (Al+aluminum-nitrogen-oxygen cluster in described; Described outer anti-reflection layer is the thin layer that includes aluminium nitrogen+alundum (Al+aluminum-nitrogen-oxygen cluster.
2. solar energy heat collection pipe according to claim 1 is characterized in that: the thickness of described infrared reflecting layer is 90～140 nanometers; The thickness of described selectively absorbing layers is 80～200 nanometers; Anti-reflection layer thickness is 20～50 nanometers in described; Described outer anti-reflection layer thickness is 20～50 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 infrared reflecting layer is made of aluminum material.
5. solar energy heat collection pipe according to claim 1 and 2 is characterized in that: described selectively absorbing layers is the absorbed layer that comprises aluminium nitrogen+aluminum-nitrogen-oxygen+chromium nitrogen+chromium nitrogen oxygen+nickel nitrogen+nickel nitrogen oxygen+aluminum-nickel-chromium cluster.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100837655A CN101886847B (en) | 2009-05-11 | 2009-05-11 | Medium-high temperature solar thermal collector tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100837655A CN101886847B (en) | 2009-05-11 | 2009-05-11 | Medium-high temperature solar thermal collector tube |
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| Publication Number | Publication Date |
|---|---|
| CN101886847A CN101886847A (en) | 2010-11-17 |
| CN101886847B true CN101886847B (en) | 2011-12-14 |
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| CN2009100837655A Expired - Fee Related CN101886847B (en) | 2009-05-11 | 2009-05-11 | Medium-high temperature solar thermal collector tube |
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Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102563933A (en) * | 2010-12-15 | 2012-07-11 | 太仓南极风能源设备有限公司 | Anti-reflection glass heat collecting tube |
| DE102011078522A1 (en) * | 2011-07-01 | 2013-01-03 | Siemens Aktiengesellschaft | Solar receiver for solar thermal system, has cermet layer which is formed of ytterbium hexaboride, arranged with Bragg mirror |
| CN103029365A (en) * | 2011-09-30 | 2013-04-10 | 中国科学院大连化学物理研究所 | Medium-high temperature solar selective absorbing coating |
| CN102305484A (en) * | 2011-10-11 | 2012-01-04 | 李德杰 | Solar collector tube with light trapping structure |
| CN103047782A (en) * | 2011-10-17 | 2013-04-17 | 山东耀国新能源科技有限公司 | Golden vacuum heat collecting tube |
| CN102615878A (en) * | 2012-03-23 | 2012-08-01 | 北京桑达太阳能技术有限公司 | High and medium temperature solar energy selective absorbing coating and preparation method thereof |
| CN102706018B (en) * | 2012-06-06 | 2014-04-09 | 中国科学院广州能源研究所 | Solar energy medium/high temperature selective absorption coating |
| CN102721211A (en) * | 2012-06-29 | 2012-10-10 | 苏州嘉言能源设备有限公司 | Medium-temperature solar thermal collector panel |
| CN105180484B (en) * | 2015-10-30 | 2017-08-25 | 山东博日明能源科技有限公司 | The middle temperature thermal-collecting tube of solar energy |
| CN105509349A (en) * | 2015-12-18 | 2016-04-20 | 九格能源科技（天津）有限公司 | Vacuum high-temperature solar heat collecting tube |
| 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 |
| CN111996491A (en) * | 2020-09-10 | 2020-11-27 | 中国电子科技集团公司第三十八研究所 | Thermal control coating with designable solar absorptivity and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1594647A (en) * | 2004-06-21 | 2005-03-16 | 朱德永 | Deposition method for solar spectrum selective absorption coating |
| CN101093115A (en) * | 2007-07-06 | 2007-12-26 | 深圳市拓日新能源科技股份有限公司 | Nickel-chromium heat collection film for conversion of light and heat of solar energy |
-
2009
- 2009-05-11 CN CN2009100837655A patent/CN101886847B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1594647A (en) * | 2004-06-21 | 2005-03-16 | 朱德永 | Deposition method for solar spectrum selective absorption coating |
| CN101093115A (en) * | 2007-07-06 | 2007-12-26 | 深圳市拓日新能源科技股份有限公司 | Nickel-chromium heat collection film for conversion of light and heat of solar energy |
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| CN101886847A (en) | 2010-11-17 |
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