CN102734964A - Trough-type solar medium-temperature and high-temperature collector tube - Google Patents
Trough-type solar medium-temperature and high-temperature collector tube Download PDFInfo
- Publication number
- CN102734964A CN102734964A CN2012102204644A CN201210220464A CN102734964A CN 102734964 A CN102734964 A CN 102734964A CN 2012102204644 A CN2012102204644 A CN 2012102204644A CN 201210220464 A CN201210220464 A CN 201210220464A CN 102734964 A CN102734964 A CN 102734964A
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- China
- Prior art keywords
- temperature
- stainless steel
- collector tube
- collecting tube
- infrared ray
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- 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.)
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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
- F24S70/00—Details of absorbing elements
- F24S70/30—Auxiliary coatings, e.g. anti-reflective coatings
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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
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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)
- Physical Vapour Deposition (AREA)
Abstract
The invention relates to a trough-type solar medium-temperature and high-temperature collector tube, which comprises a stainless steel substrate and is characterized in that an anti-infrared reflecting film, a titanium oxynitride graded absorbing film and an antireflection film are sequentially arranged on the stainless steel substrate. Since the coating layer of the collector tube provided by the invention has lower low-temperature emissivity, a film system has lower thermal loss and the thermal insulation performance is good; and since the coating layer is made of a high-hardness, wear-resistant and antioxidant material and the resistivity is low, the weather resistance and the medium-temperature and high-temperature service performance of the collector tube provided by the invention are excellent and the collector tube is suitable for temperature of 350-550DEG C.
Description
Technical field
The invention belongs to solar thermal collector, more particularly, the present invention relates to high temperature heat collector thermal-collecting tube in a kind of groove type solar.
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 high temperature heat collector thermal-collecting tube in a kind of groove type solar, described thermal-collecting tube good weatherability, middle temperature serviceability is good.
To achieve these goals, the present invention has adopted following technical scheme:
The high temperature heat collector thermal-collecting tube comprises stainless steel base in a kind of groove type solar, it is characterized in that on stainless steel base, being provided with successively niobium counter infrared ray reflectance coating, titanium oxynitrides gradual change absorbing film and titanium dioxide 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 niobium counter infrared ray reflectance coating on stainless steel base deposits the titanium oxynitrides absorbing film, last deposition of titanium oxide antireflective coating again.
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 titanium oxynitrides 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 titanium oxynitrides absorbing film, adopt titanium target sputtering sedimentation titanium dioxide 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 heat collector thermal-collecting tube comprises stainless steel base in the groove type solar of the present invention, is provided with one deck niobium counter infrared ray reflectance coating, titanium oxynitrides gradual change absorbing film and titanium dioxide antireflective coating on it successively.
Preparation technology is following:
Sputtering sedimentation niobium counter infrared ray reflectance coating on stainless steel base, operating pressure 0.2-1.5 Pa; Sputter titanium oxynitrides 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 titanium dioxide 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. high temperature heat collector thermal-collecting tube in the groove type solar comprises stainless steel base, it is characterized in that on stainless steel base, being provided with successively niobium counter infrared ray reflectance coating, titanium oxynitrides gradual change absorbing film and titanium dioxide 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 niobium counter infrared ray reflectance coating on stainless steel base; Deposit the titanium oxynitrides absorbing film again, last deposition of titanium oxide antireflective coating.
3. the described heat collector thermal-collecting tube of claim 1 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 |
|---|---|---|---|
| CN2012102204644A CN102734964A (en) | 2012-06-29 | 2012-06-29 | Trough-type solar medium-temperature and high-temperature collector tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102204644A CN102734964A (en) | 2012-06-29 | 2012-06-29 | Trough-type solar medium-temperature and high-temperature collector tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102734964A true CN102734964A (en) | 2012-10-17 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012102204644A Pending CN102734964A (en) | 2012-06-29 | 2012-06-29 | Trough-type solar medium-temperature and high-temperature collector tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102734964A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4277537A (en) * | 1978-02-18 | 1981-07-07 | Woodman Trevor P | Paint composition for the spectrally selective coating of metal surfaces, method of producing coatings therewith and an article produced thereby |
| CN101737983A (en) * | 2009-11-25 | 2010-06-16 | 北京航空航天大学 | Solar spectrum selective absorbing coating and preparation method thereof |
| CN101818328A (en) * | 2010-04-22 | 2010-09-01 | 常州博士新能源科技有限公司 | Preparation method of multilayer compound solar energy selective absorption plating layer |
| CN102226593A (en) * | 2011-05-07 | 2011-10-26 | 常州龙腾太阳能热电设备有限公司 | Membrane structure of high-temperature oxidation-resistant selective absorption membrane for inner pipe of condensation solar thermal power generation collector pipe |
-
2012
- 2012-06-29 CN CN2012102204644A patent/CN102734964A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4277537A (en) * | 1978-02-18 | 1981-07-07 | Woodman Trevor P | Paint composition for the spectrally selective coating of metal surfaces, method of producing coatings therewith and an article produced thereby |
| CN101737983A (en) * | 2009-11-25 | 2010-06-16 | 北京航空航天大学 | Solar spectrum selective absorbing coating and preparation method thereof |
| CN101818328A (en) * | 2010-04-22 | 2010-09-01 | 常州博士新能源科技有限公司 | Preparation method of multilayer compound solar energy selective absorption plating layer |
| CN102226593A (en) * | 2011-05-07 | 2011-10-26 | 常州龙腾太阳能热电设备有限公司 | Membrane structure of high-temperature oxidation-resistant selective absorption membrane for inner pipe of condensation solar thermal power generation collector pipe |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20121017 |