CN102721208A - Heat collecting plate of solar heat collector - Google Patents
Heat collecting plate of solar heat collector Download PDFInfo
- Publication number
- CN102721208A CN102721208A CN2012102198234A CN201210219823A CN102721208A CN 102721208 A CN102721208 A CN 102721208A CN 2012102198234 A CN2012102198234 A CN 2012102198234A CN 201210219823 A CN201210219823 A CN 201210219823A CN 102721208 A CN102721208 A CN 102721208A
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- titanium
- stainless steel
- heat
- infrared ray
- absorbing film
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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 heat collecting plate of a solar heat collector. The heat collecting plate comprises a stainless steel base plate and is characterized in that a titanium nitride anti-infrared reflective film, a titanium oxynitride gradient absorbing film and a titanium oxide antireflective film are arranged on the stainless steel base plate in sequence. As coatings of the heat collecting plate are low in low-temperature emissivity, a film system is low in heat waste and high in heat preservation property; and meanwhile, as the coatings are made of high-hardness, wear-resisting and oxidation-resisting materials and are low in electrical resistivity, the heat collector is high in weather resistance and medium-temperature usability and is suitable for the temperature of between 300 and 450 DEG C.
Description
Technical field
The invention belongs to solar thermal collector, more particularly, the present invention relates to a kind of solar thermal collector thermal-arrest plate.
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 solar thermal collector thermal-arrest plate, described thermal-arrest plate good weatherability, middle temperature serviceability is good.
To achieve these goals, the present invention has adopted following technical scheme:
A kind of solar thermal collector thermal-arrest plate comprises stainless steel substrate, it is characterized in that on stainless steel substrate, being provided with successively titanium nitride counter infrared ray reflectance coating, titanium oxynitrides gradual change absorbing film and titanium oxide 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 depositing titanium nitride counter infrared ray reflectance coating on stainless steel substrate deposits the titanium oxynitrides absorbing film again, deposits the titanium oxide antireflective coating at last.
Wherein, described titanium oxynitrides 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.
Wherein, sputter one deck titanium nitride counter infrared ray reflectance coating on stainless steel substrate, operating pressure 0.2-1.5 Pa, reacting gas nitrogen amount 20-200 Sccm.
Wherein, sputter titanium oxynitrides absorbing film on the counter infrared ray reflectance coating, operating pressure 0.2-0.8Pa, reacting gas nitrogen, 1: 1 ~ 1:10 of nitrogen oxygen volume ratio, gas flow 60-150Sccm.
Wherein, sputtering sedimentation titanium oxide antireflective coating on the titanium oxynitrides absorbing film, operating pressure 0.2-0.8Pa, reacting gas amount of oxygen 30-200Sccm.
Thermal-arrest plate 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 temperature serviceability are excellent, are suitable at 300-450 ℃.
The specific embodiment
Solar thermal collector thermal-arrest plate of the present invention comprises stainless steel substrate, is provided with one deck titanium nitride counter infrared ray reflectance coating, titanium oxynitrides gradual change absorbing film and titanium oxide antireflective coating on it successively.
Preparation technology is following:
Sputtering sedimentation titanium nitride counter infrared ray reflectance coating on stainless steel substrate, operating pressure 0.2-1.5 Pa, reacting gas nitrogen amount 20-200Sccm; Sputter titanium oxynitrides gradual change 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, gas flow 60-150Sccm; Sputtering sedimentation titanium oxide antireflective coating on titanium oxynitrides gradual change absorbing film, operating pressure 0.2-0.8Pa, reacting gas amount of oxygen 30-200Sccm.
Claims (3)
1. a solar thermal collector thermal-arrest plate comprises stainless steel substrate, it is characterized in that on stainless steel substrate, being provided with successively titanium nitride counter infrared ray reflectance coating, titanium oxynitrides gradual change absorbing film and titanium oxide antireflective coating.
2. the described heat collector thermal-arrest of claim 1 plate; 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 depositing titanium nitride counter infrared ray reflectance coating on stainless steel substrate; Deposit the titanium oxynitrides absorbing film again, deposit the titanium oxide antireflective coating at last.
3. the described heat collector thermal-arrest of claim 1 plate is characterized in that described titanium oxynitrides 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102198234A CN102721208A (en) | 2012-06-29 | 2012-06-29 | Heat collecting plate of solar heat collector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102198234A CN102721208A (en) | 2012-06-29 | 2012-06-29 | Heat collecting plate of solar heat collector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102721208A true CN102721208A (en) | 2012-10-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012102198234A Pending CN102721208A (en) | 2012-06-29 | 2012-06-29 | Heat collecting plate of solar heat collector |
Country Status (1)
| Country | Link |
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| CN (1) | CN102721208A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109881155A (en) * | 2019-03-04 | 2019-06-14 | 南京工业大学 | Intelligent selection sunlight is penetrated with reflectance coating and preparation method thereof |
| US10600924B2 (en) * | 2018-06-06 | 2020-03-24 | National Chung Hsing University | Solar energy absorbing device |
| CN111172506A (en) * | 2020-01-16 | 2020-05-19 | 陕西科技大学 | Ti-doped titanium oxide composite solar selective absorbing coating and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4098956A (en) * | 1976-08-11 | 1978-07-04 | The United States Of America As Represented By The Secretary Of The Interior | Spectrally selective solar absorbers |
| CN1594644A (en) * | 2004-07-12 | 2005-03-16 | 广州粤海真空技术有限公司 | Preparation method for TiOxNy highly effective solar photo-thermal conversion film |
| CN102062485A (en) * | 2010-11-19 | 2011-05-18 | 山东帅克新能源有限公司 | Heat collection plate of solar energy flat plate collector and film plating method for heat collection plate |
-
2012
- 2012-06-29 CN CN2012102198234A patent/CN102721208A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4098956A (en) * | 1976-08-11 | 1978-07-04 | The United States Of America As Represented By The Secretary Of The Interior | Spectrally selective solar absorbers |
| CN1594644A (en) * | 2004-07-12 | 2005-03-16 | 广州粤海真空技术有限公司 | Preparation method for TiOxNy highly effective solar photo-thermal conversion film |
| CN102062485A (en) * | 2010-11-19 | 2011-05-18 | 山东帅克新能源有限公司 | Heat collection plate of solar energy flat plate collector and film plating method for heat collection plate |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10600924B2 (en) * | 2018-06-06 | 2020-03-24 | National Chung Hsing University | Solar energy absorbing device |
| CN109881155A (en) * | 2019-03-04 | 2019-06-14 | 南京工业大学 | Intelligent selection sunlight is penetrated with reflectance coating and preparation method thereof |
| CN111172506A (en) * | 2020-01-16 | 2020-05-19 | 陕西科技大学 | Ti-doped titanium oxide composite solar selective absorbing coating and preparation method thereof |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20121010 |