CN102734965A - Coating of medium-high-temperature solar heat collecting pipe - Google Patents
Coating of medium-high-temperature solar heat collecting pipe Download PDFInfo
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- CN102734965A CN102734965A CN 201210220496 CN201210220496A CN102734965A CN 102734965 A CN102734965 A CN 102734965A CN 201210220496 CN201210220496 CN 201210220496 CN 201210220496 A CN201210220496 A CN 201210220496A CN 102734965 A CN102734965 A CN 102734965A
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- coating
- collecting tube
- stainless steel
- absorbing film
- infrared ray
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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
Abstract
The invention relates to a coating of a medium-high-temperature solar heat collecting pipe. The coating comprises a stainless steel substrate, and is characterized in that an anti-infrared reflecting film, an aluminum-silicon-nitric-oxide gradient absorbing film and an anti-reflecting film are sequentially arranged on the stainless steel substrate. The coating is relatively low in low temperature emissivity, so that the films are relatively low in heat waste and have good heat preservation property, and the coating is high in hardness and low in resistivity, and is wear-resistant and oxidation-resistant; therefore, a heat collector with the coating has high weather resistance and excellent medium-high-temperature use performance, and the coating is suitable for the heat collecting pipe working at the temperature of between 350 and 550 DEG C.
Description
Technical field
The invention belongs to solar thermal collector, more particularly, the present invention relates to a kind of middle high-temperature solar thermal-collecting tube coating.
Background technology
The energy and environment are the world today's two big outstanding social concerns, and in the face of various shortage of energy sources and environmental pollution, the utilization of seeking regenerative resource becomes the main direction of various countries to energy research.Solar energy is a kind of renewable, pollution-free, resource that reserves are abundant; How to make full use of solar energy resources; Key is to improve the capacity usage ratio and the utilization rate of solar thermal collector, and its core technology then is the coating for selective absorption of a kind of high-absorbility of preparation, low-launch-rate, cheapness.Solar energy heat utilization field, current development priority are middle high-temperature heat-gatherings, and operating temperature surpasses 400 ℃ thermal-collecting tube, can be used for the heat generating.
In the middle high-temperature heat-collection pipe, generally adopt the high power concentrator technology, the optically focused ratio can be up to 80.The photo-thermal transformation efficiency is a key index, and often the raising of one percentage point all is a strain after.Though the employing concentration structure because problems such as preparation precision and glass deformation exist, can not reach the degree of ideal focusing, the hot spot of along can be compared with the thermal-collecting tube diameter basically.This just makes incident ray and thermal-collecting tube surface angle be distributed in 0 to spend in the gamut of 90 degree.During wide-angle incident, reflectivity is near 100%.Simple calculating show, the absorptance on thermal-arrest surface 90% during less than complete vertical incidence of light.In addition, morning and afternoon, the angle on incident light and thermal-collecting tube surface became bigger during the daylight deflection, and absorptivity further reduces.When the absorptance when vertical incidence reached 0.95, the average absorption ratio had only about 0.8.
Current, the absorptance during the light vertical incidence has been difficult to further raising, and the absorptance when improving the light non-normal incidence will become the committed step that improves the photo-thermal transformation efficiency.
Can know from the heat radiation theory, the absorptance of black matrix or grey body, irrelevant with the incident angle of light.Nature does not exist desirable black matrix or grey body, but the comparable rough surface of size and optical wavelength can be similar to and is regarded as grey body, and the coarse sorbent surface of making near desirable grey body is the key of dealing with problems.
Summary of the invention
In order to solve the above-mentioned technical problem that exists in the prior art, the object of the present invention is to provide a kind of middle high-temperature solar thermal-collecting tube coating, described thermal-collecting tube good weatherability, middle temperature serviceability is good.
To achieve these goals, the present invention has adopted following technical scheme:
High-temperature solar thermal-collecting tube coating in a kind of comprises stainless steel base, it is characterized in that on stainless steel base, being provided with successively molybdenum counter infrared ray reflectance coating, nitrogen oxygen aluminium silicon gradual change absorbing film and silica antireflective coating.
Wherein, plated film adopts the reactive magnetron sputtering method, and sputter gas is an argon gas; Reacting gas is high pure nitrogen and oxygen; At first reactive magnetron sputtering deposition molybdenum counter infrared ray reflectance coating on stainless steel base deposits nitrogen oxygen aluminium silicon absorbing film, last deposition of silica antireflective coating again.
Wherein, described nitrogen oxygen aluminium silicon gradual change absorbing film is the composition graded films, and begins from described counter infrared ray reflectance coating that the content of nitrogen reduces gradually till the antireflective coating, and the content of oxygen increases gradually.
Wherein, described nitrogen oxygen aluminium silicon gradual change absorbing film is the composition graded films, and begins from described counter infrared ray reflectance coating that the content of aluminium reduces gradually till the antireflective coating, and the content of silicon increases gradually.
Wherein, sputter nitrogen oxygen aluminium silicon absorbing film on the counter infrared ray reflectance coating, operating pressure 0.2-0.8Pa, reacting gas nitrogen and oxygen, 1: 1 ~ 1:10 of nitrogen oxygen volume ratio, the sputter ratio of aluminium and silicon is: 1: 1 ~ 1:10, gas flow 100-200Sccm.
Wherein, on nitrogen oxygen aluminium silicon absorbing film, adopt silicon target sputtering sedimentation silica antireflective coating, operating pressure 0.2-0.8Pa, reacting gas amount of oxygen 30-200 Sccm.
Thermal-collecting tube coating of the present invention has lower low temperature emissivity; Therefore this film cording has lower heat waste; Good heat insulating, while coating high rigidity, wear-resisting and non-oxidizability material, and also resistivity is low; Therefore the weatherability of heat collector of the present invention and middle high temperature serviceability are excellent, are suitable at 350-550 ℃.
The specific embodiment
The high-temperature solar thermal-collecting tube coating comprises stainless steel base in of the present invention, is provided with one deck molybdenum counter infrared ray reflectance coating, nitrogen oxygen aluminium silicon gradual change absorbing film and silica antireflective coating on it successively.
Preparation technology is following:
Sputtering sedimentation molybdenum counter infrared ray reflectance coating on stainless steel base, operating pressure 0.2-1.5 Pa; Sputter nitrogen oxygen aluminium silicon absorbing film on the counter infrared ray reflectance coating, operating pressure 0.2-0.8Pa, reacting gas nitrogen and oxygen, 1: 1 ~ 1:10 of nitrogen oxygen volume ratio, the sputter ratio of aluminium and silicon is: 1: 1 ~ 1:10, gas flow 100-200Sccm; Sputtering sedimentation silica antireflective coating on nitrogen oxygen aluminium silicon gradual change absorbing film, operating pressure 0.2-0.8Pa, reacting gas amount of oxygen 30-200Sccm.
Claims (4)
1. high-temperature solar thermal-collecting tube coating in a kind comprises stainless steel base, it is characterized in that on stainless steel base, being provided with successively molybdenum counter infrared ray reflectance coating, nitrogen oxygen aluminium silicon gradual change absorbing film and silica antireflective coating.
2. the described heat collector thermal-collecting tube of claim 1; It is characterized in that described film adopts the reactive magnetron sputtering method; Sputter gas is an argon gas, and reacting gas is high pure nitrogen and oxygen, at first reactive magnetron sputtering deposition molybdenum counter infrared ray reflectance coating on stainless steel base; Deposit nitrogen oxygen aluminium silicon absorbing film again, last deposition of silica antireflective coating.
3. the described heat collector thermal-collecting tube of claim 1 is characterized in that described nitrogen oxygen aluminium silicon gradual change absorbing film is the composition graded films, begins from described counter infrared ray reflectance coating wherein that the content of nitrogen reduces gradually till the antireflective coating, and the content of oxygen increases gradually.
4. the described heat collector thermal-collecting tube of claim 1 is characterized in that described nitrogen oxygen aluminium silicon gradual change absorbing film is the composition graded films, begins from described counter infrared ray reflectance coating wherein that the content of aluminium reduces gradually till the antireflective coating, and the content of silicon increases gradually.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210220496 CN102734965A (en) | 2012-06-29 | 2012-06-29 | Coating of medium-high-temperature solar heat collecting pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210220496 CN102734965A (en) | 2012-06-29 | 2012-06-29 | Coating of medium-high-temperature solar heat collecting pipe |
Publications (1)
| Publication Number | Publication Date |
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| CN102734965A true CN102734965A (en) | 2012-10-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN 201210220496 Pending CN102734965A (en) | 2012-06-29 | 2012-06-29 | Coating of medium-high-temperature solar heat collecting pipe |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106884145A (en) * | 2016-12-28 | 2017-06-23 | 北京航空航天大学 | A kind of coating for selective absorption of sunlight spectrum and preparation method thereof |
| CN110104957A (en) * | 2019-04-17 | 2019-08-09 | 信利光电股份有限公司 | A kind of anti-reflective film of wide bandwidth and preparation method thereof |
-
2012
- 2012-06-29 CN CN 201210220496 patent/CN102734965A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106884145A (en) * | 2016-12-28 | 2017-06-23 | 北京航空航天大学 | A kind of coating for selective absorption of sunlight spectrum and preparation method thereof |
| CN106884145B (en) * | 2016-12-28 | 2019-09-17 | 北京航空航天大学 | A kind of coating for selective absorption of sunlight spectrum and preparation method thereof |
| CN110104957A (en) * | 2019-04-17 | 2019-08-09 | 信利光电股份有限公司 | A kind of anti-reflective film of wide bandwidth and preparation method thereof |
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Application publication date: 20121017 |