CN102721206A - Thermal collection tube of intermediate-and-low temperature solar thermal collector - Google Patents
Thermal collection tube of intermediate-and-low temperature solar thermal collector Download PDFInfo
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- CN102721206A CN102721206A CN2012102197941A CN201210219794A CN102721206A CN 102721206 A CN102721206 A CN 102721206A CN 2012102197941 A CN2012102197941 A CN 2012102197941A CN 201210219794 A CN201210219794 A CN 201210219794A CN 102721206 A CN102721206 A CN 102721206A
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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 invention relates to a thermal collection tube of an intermediate-and-low temperature solar thermal collector. The thermal collection tube comprises a stainless steel base body and is characterized in that an anti-infrared reflecting film, aluminum oxynitride and an antireflective film are arranged on the stainless steel base body. According to the thermal collection tube, a coating of the heat collection tube has low-temperature transmission rate, so that a film system has low heat loss, the heat insulation performance is good, and simultaneously, the coating is high in rigidity, wear-resistant and anti-oxidation, and is low in resistivity, so that the thermal collector disclosed by the invention is excellent in weather fastness and usability in intermediate temperature, and is suitable for being used at 350 DEG C-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-temp solar heat collector thermal-collecting tube.
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-temp solar heat collector thermal-collecting tube, described thermal-collecting tube good weatherability, middle temperature serviceability is good.
To achieve these goals, the present invention has adopted following technical scheme:
High-temp solar heat collector thermal-collecting tube 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, aluminum oxynitride 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 the aluminum oxynitride absorbing film, last deposition of silica antireflective coating again.
Wherein, described aluminum oxynitride 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 aluminum oxynitride 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.
Wherein, on the aluminum oxynitride 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-temp solar heat collector thermal-collecting tube comprises stainless steel base in of the present invention, is provided with one deck molybdenum counter infrared ray reflectance coating, aluminum oxynitride 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 aluminum oxynitride gradual change 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; Sputtering sedimentation silica antireflective coating on aluminum oxynitride gradual change absorbing film, operating pressure 0.2-0.8Pa, reacting gas amount of oxygen 30-200Sccm.
Claims (3)
1. high-temp solar heat collector thermal-collecting tube 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, aluminum oxynitride 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 the aluminum oxynitride 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 aluminum oxynitride 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 |
|---|---|---|---|
| CN2012102197941A CN102721206A (en) | 2012-06-29 | 2012-06-29 | Thermal collection tube of intermediate-and-low temperature solar thermal collector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102197941A CN102721206A (en) | 2012-06-29 | 2012-06-29 | Thermal collection tube of intermediate-and-low temperature solar thermal collector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102721206A true CN102721206A (en) | 2012-10-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012102197941A Pending CN102721206A (en) | 2012-06-29 | 2012-06-29 | Thermal collection tube of intermediate-and-low temperature solar thermal collector |
Country Status (1)
| Country | Link |
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| CN (1) | CN102721206A (en) |
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 |
| CN110055491A (en) * | 2019-05-14 | 2019-07-26 | 淮安亮谷光电科技有限公司 | The preparation method of complete gold-plated high reflection infrared heating hollow pipe |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1056159A (en) * | 1991-06-18 | 1991-11-13 | 北京市太阳能研究所 | Solar selective absorbing film and preparation |
| WO2009107157A2 (en) * | 2008-02-29 | 2009-09-03 | Enea - Ente Per Le Nuove Tecnologie, L'energia E L'ambiente | Method for producing a cermet-based spectrally selective coating for the receiver tube of a solar concentrator, and material thus obtained |
| CN102108491A (en) * | 2010-12-30 | 2011-06-29 | 东莞市康达机电工程有限公司 | High-temperature solar selective absorbing coating and preparation method thereof |
| CN102207341A (en) * | 2011-07-01 | 2011-10-05 | 中国华能集团清洁能源技术研究院有限公司 | Medium-high-temperature through type metal solar collector tube |
-
2012
- 2012-06-29 CN CN2012102197941A patent/CN102721206A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1056159A (en) * | 1991-06-18 | 1991-11-13 | 北京市太阳能研究所 | Solar selective absorbing film and preparation |
| WO2009107157A2 (en) * | 2008-02-29 | 2009-09-03 | Enea - Ente Per Le Nuove Tecnologie, L'energia E L'ambiente | Method for producing a cermet-based spectrally selective coating for the receiver tube of a solar concentrator, and material thus obtained |
| CN102108491A (en) * | 2010-12-30 | 2011-06-29 | 东莞市康达机电工程有限公司 | High-temperature solar selective absorbing coating and preparation method thereof |
| CN102207341A (en) * | 2011-07-01 | 2011-10-05 | 中国华能集团清洁能源技术研究院有限公司 | Medium-high-temperature through type metal solar collector tube |
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 |
| CN110055491A (en) * | 2019-05-14 | 2019-07-26 | 淮安亮谷光电科技有限公司 | The preparation method of complete gold-plated high reflection infrared heating hollow pipe |
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Application publication date: 20121010 |