CN114265136A - Condensation reflector with frost and snow prevention super-hydrophobic characteristic - Google Patents
Condensation reflector with frost and snow prevention super-hydrophobic characteristic Download PDFInfo
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- CN114265136A CN114265136A CN202111576205.0A CN202111576205A CN114265136A CN 114265136 A CN114265136 A CN 114265136A CN 202111576205 A CN202111576205 A CN 202111576205A CN 114265136 A CN114265136 A CN 114265136A
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Abstract
The invention discloses a condensation reflector with frost and snow prevention super-hydrophobic characteristics, which is characterized by comprising a super-hydrophobic coating, a glass substrate layer, a reflecting layer and a protective paint layer, wherein the super-hydrophobic coating is coated on the upper surface of the glass substrate layer, the reflecting layer is coated on the lower surface of the glass substrate layer, the protective paint layer is coated on the lower surface of the reflecting layer, and the glass substrate layer, the reflecting layer and the protective paint layer are integrated to form the reflector. The invention enables the light gathering reflector to have self-cleaning capability, is easy to remove frost and snow on the surface, saves water resources and greatly reduces the cleaning cost of the reflector; meanwhile, the reflectivity of the mirror field can be improved, and the optical efficiency of the mirror field is further improved.
Description
Technical Field
The invention relates to the technical field of photovoltaics, in particular to a light gathering reflector with frost and snow prevention and super-hydrophobic characteristics.
Background
The light-gathering solar thermal power generation system converts solar radiation energy into heat energy by using a focusing solar heat collector, and then generates power by using a steam turbine and a generator. According to different focusing forms, the light-gathering solar heat collection power generation system mainly comprises a tower type, a groove type and a disc type.
In a concentrating solar heat collection power generation system, the optical focusing performance of a reflector in a mirror field directly influences the power generation efficiency of the whole power station. In order to ensure the optical performance of the reflector, the surface of the reflector needs to be kept clean, and the reflectivity of the reflector needs to be improved to the maximum extent. At present, in a power station, there are mainly 2 problems for the maintenance of the optical performance of the mirrors:
firstly, the water consumption for cleaning is large. At present, the reflectors are cleaned in a water washing mode, in order to achieve certain cleanliness, the cleaning frequency is generally once per week, and the cleaning cost is high.
Secondly, the ice coating time is long. In winter, ice, snow and other natural weather can also bring icing phenomenon to key main parts in the light field, and normal surface defrosting (icing) needs 3-4 hours, thereby greatly influencing the light-gathering time of the reflector.
These problems directly lead to a considerable increase in operating costs, seriously affecting the economic performance of the solar thermal power station. Therefore, the improvement of the maintenance of the reflecting mirror in the solar photothermal power station is a problem to be solved urgently at present.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention provides the light gathering reflector with the frost and snow prevention super-hydrophobic characteristic, so that the light gathering reflector has the self-cleaning capability, frost and snow on the surface can be easily removed, the water resource is saved, and the cleaning cost of the reflector is greatly reduced; meanwhile, the reflectivity of the mirror field can be improved, and the optical efficiency of the mirror field is further improved.
The invention mainly adopts the technical scheme that:
the utility model provides a spotlight reflector with frost prevention snow super hydrophobic characteristic, includes super hydrophobic coating, glass stratum basale, reflecting layer and protective paint layer, super hydrophobic coating is at glass stratum basale upper surface, the reflecting layer coating is in glass stratum basale lower surface, the protective paint layer coating is at the reflecting layer lower surface, just glass stratum basale, reflecting layer and protective paint layer are a whole, form the speculum.
Preferably, the super-hydrophobic coating is a nanomaterial of silicone.
Preferably, the super-hydrophobic coating is coated by adopting a drawing, curtain coating or spraying process, a layer of transparent super-hydrophobic film is formed on the surface of the glass substrate layer, and the thickness of the super-hydrophobic coating is 150nm-200 nm.
Preferably, the glass substrate layer is low-iron ultra-white float glass, and the shape of the glass substrate layer is a plane or cambered surface structure.
Preferably, the reflecting layer is made of multilayer nano materials, and a magnetron sputtering process is adopted, and the vacuum degree is 5 x 10-3Under the condition of Pa, first Al is sequentially deposited on the surface of the glass substrate layer2O3Film layer, Ag film layer, second Al2O3Film layer and SiO2And (5) film layer.
Preferably, the first Al2O3The thickness of the film layer is 20-50nm, and the thickness of the Ag film layer is 150-200 nm; second Al2O3The thickness of the film layer is 20-50 nm; the SiO2The thickness of the film layer is 50nm-250 nm.
Preferably, the protective paint layer is of a double-layer structure and comprises an inner protective paint layer and an outer protective paint layer, the inner protective paint layer is coated on the surface of the reflecting layer, and the outer protective paint layer is coated on the surface of the inner protective paint layer.
Preferably, the inner protective paint layer is a two-component quick-drying silver mirror protective paint, and the outer protective paint layer is a single-component quick-drying silver mirror protective paint.
Has the advantages that: the invention provides a light gathering reflector with frost and snow prevention super-hydrophobic characteristics, which has the following advantages:
(1) after the super-hydrophobic coating is specially coated, a transparent super-hydrophobic film is formed on the surface of the glass, so that the transmittance of the glass substrate can be improved by more than 1%, and the glass has the functions of frost prevention, snow prevention and self-cleaning;
(2) the protective paint layer is of a double-layer structure, has the characteristics of salt mist resistance and moisture and freezing resistance, can comprehensively and effectively protect the reflector coating, and prolongs the service life of the reflector coating;
(3) the super-hydrophobic coating is simple to construct, can be repeatedly coated after the reflector surface is damaged by long-time sand wind and rain impact, and is low in later maintenance cost.
Drawings
Fig. 1 is a schematic view of the structure of the mirror coating of example 1.
In the figure: super-hydrophobic coating 1, glass substrate layer 2, reflecting layer 3 and first Al2O3Film 3-1, Ag film 3-2, second Al2O33-3 parts of a film layer, 3-4 parts of a SiOx film layer, 4 parts of a protective paint layer, 4-1 parts of an inner protective paint layer and 4-2 parts of an outer protective paint layer.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Example 1
As shown in fig. 1, a light gathering reflector with frost and snow prevention super-hydrophobic characteristics has a surface coating structure as follows:
glass substrate layer 2: the low-iron ultra-white float glass has a plane or arc structure.
Super-hydrophobic coating 1: siloxane nano materials are coated on the concave cambered surface of the glass substrate layer through a spraying process, the thickness of the super-hydrophobic coating is 168nm, and the glass substrate can be naturally air-dried in the outdoor construction environment under sunlight;
reflective layer 3: is a multi-layer nano material, adopts a magnetron sputtering process and has a vacuum degree of 5 x 10-3Under the condition of Pa, first Al is sequentially deposited on the surface of the glass substrate layer2O3Film 3-1, Ag film 3-2, second Al2O3Film layer 3-3 and SiOxFilm layer 3-4 of the first Al2O3The thickness of the film layer 3-1 is 45nm, and the film layer is mainly used as a bonding layer and is improvedThe adhesive force of the Ag film layer and the glass substrate layer; the thickness of the Ag film layer 3-2 is 165nm, and the Ag film layer mainly plays a role in reflection; second Al2O3The thickness of the film layer 3-3 is 45nm, and the film layer is mainly used as an intermediate bonding layer to improve the adhesive force; (ii) a The thickness of the SiOx film layers 3-4 is 180nm, and the SiOx film layers mainly play a role in protection.
The protective paint layer 4 comprises an inner protective paint layer 4-1 and an outer protective paint layer 4-2, the inner protective paint layer is coated on the surface of the reflecting layer, the outer protective paint layer 4-2 is coated on the surface of the inner protective paint layer 4-1, the inner protective paint layer 4-1 is a two-component quick-drying silver mirror protective paint, and the outer protective paint layer 4-2 is a single-component quick-drying silver mirror protective paint.
The super-hydrophobic coating of the invention has the following action principle: pollutants with large surface energy are difficult to stably adhere to the super-hydrophobic coating with low surface energy, and substances such as frost, snow and the like can directly roll off; the water droplet surface energy is high, can't spread out, forms the spheroid, and when the contact of spheroid water droplet and pollutant, through adsorption with pollutant adhesion in self surface, and then parcel pollutant rolls and breaks away from the surface and reaches clean purpose.
In addition, since the solar photothermal power station is usually located in a drought and rainless area, the wind sand is large, and the super-hydrophobic coating is extremely easy to damage, so that the service life of the coating is short, and the reflector needs to be coated again at regular intervals. However, the coating has simple construction process and easy operation.
The light gathering reflector of example 1 and the existing light gathering reflector (new energy, toshiba, ltd.) were tested in 1 standard loop (600 m) on an inner mongolian ullate 100MW power generation project, and the test results showed that: under severe weather conditions, such as the cold winter season of 10-2 months per year, the snow and frost can be effectively prevented; the light-gathering reflector also has good defense effect on sand storm, and particularly, the frosting time is shortened to 20 percent of that of the existing light-gathering reflector.
The light-gathering reflector of example 1 was tested for reflectivity comparison with existing light-gathering reflectors (san Donghua New energy Co., Ltd.) wherein the light reflectivity of example 1 was as follows: measurement point 1 was 94.4%, measurement point 2 was 95.6%, and measurement point 3 was 94.6%; the reflection rate of the existing condensing reflector is as follows: measurement point 1 was 94.3%, measurement point 2 was 94.5%, and measurement point 3 was 94.4%. As can be seen from the comparative experiments, the super-hydrophobic coating provided by the invention not only can improve the reflectivity of the glass substrate by more than 1%, but also has the effects of frost prevention, snow prevention and self-cleaning.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (8)
1. The utility model provides a spotlight reflector with frost prevention snow super hydrophobic characteristic which characterized in that, includes super hydrophobic coating, glass stratum basale, reflecting layer and protective paint layer, super hydrophobic coating is on glass stratum basale upper surface, the reflecting layer coating is in glass stratum basale lower surface, the protective paint layer coating is on the reflecting layer lower surface, just glass stratum basale, reflecting layer and protective paint layer are a whole, form the speculum.
2. The light gathering reflector with frost and snow prevention superhydrophobic property as claimed in claim 1, wherein the superhydrophobic coating is a nanomaterial of silicone.
3. The light gathering reflector with frost and snow prevention and superhydrophobic property according to claim 1, wherein the superhydrophobic coating is coated by a drawing, curtain coating or spraying process, a transparent superhydrophobic film is formed on the surface of the glass substrate layer, and the thickness of the superhydrophobic coating is 150nm-200 nm.
4. The light gathering reflector with frost and snow prevention and superhydrophobic property as claimed in claim 1, wherein the glass substrate layer is low iron ultra white float glass, and the shape of the glass substrate layer is a plane or a cambered surface structure.
5. Root of herbaceous plantThe light gathering reflector with frost and snow prevention and super-hydrophobic characteristics as claimed in claim 1, wherein the reflecting layer is made of multi-layer nano material by magnetron sputtering process at vacuum degree of 5 x 10-3Under the condition of Pa, first Al is sequentially deposited on the surface of the glass substrate layer2O3Film layer, Ag film layer, second Al2O3Film layer and SiO2And (5) film layer.
6. The light gathering reflector with frost and snow prevention superhydrophobic property as claimed in claim 5, wherein said first Al is2O3The thickness of the film layer is 20-50nm, and the thickness of the Ag film layer is 150-200 nm; second Al2O3The thickness of the film layer is 20-50 nm; the SiO2The thickness of the film layer is 50nm-250 nm.
7. The light gathering reflector with frost and snow prevention and super-hydrophobic characteristics as claimed in claim 1, wherein the protective paint layer is a double-layer structure comprising an inner protective paint layer and an outer protective paint layer, the inner protective paint layer is coated on the surface of the reflective layer, and the outer protective paint layer is coated on the surface of the inner protective paint layer.
8. The light gathering reflector with frost and snow prevention and super-hydrophobic characteristics as claimed in claim 7, wherein the inner protective paint layer is a two-component quick-drying silver mirror protective paint, and the outer protective paint layer is a one-component quick-drying silver mirror protective paint.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111576205.0A CN114265136A (en) | 2021-12-22 | 2021-12-22 | Condensation reflector with frost and snow prevention super-hydrophobic characteristic |
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| CN202111576205.0A CN114265136A (en) | 2021-12-22 | 2021-12-22 | Condensation reflector with frost and snow prevention super-hydrophobic characteristic |
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| US20050094279A1 (en) * | 2003-10-30 | 2005-05-05 | Tonar William L. | Electrochromic device having a self-cleaning hydrophilic coating with an acid resistant under layer |
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| CN202256741U (en) * | 2011-09-16 | 2012-05-30 | 常州工业技术玻璃有限公司 | Reflecting Ag mirror used for solar thermal power generation |
| WO2015029746A1 (en) * | 2013-08-29 | 2015-03-05 | コニカミノルタ株式会社 | Reflecting mirror for solar thermal power generation and reflective device for solar thermal power generation |
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| CN110109205A (en) * | 2019-06-14 | 2019-08-09 | 湖北亿钧耀能新材股份公司 | A kind of solar energy mirror and preparation method thereof |
| CN212476548U (en) * | 2020-05-20 | 2021-02-05 | 几何智慧城市科技(广州)有限公司 | Super-hydrophobic glass with self-cleaning function |
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2021
- 2021-12-22 CN CN202111576205.0A patent/CN114265136A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050094279A1 (en) * | 2003-10-30 | 2005-05-05 | Tonar William L. | Electrochromic device having a self-cleaning hydrophilic coating with an acid resistant under layer |
| CN101776778A (en) * | 2010-02-23 | 2010-07-14 | 常州龙腾太阳能热电设备有限公司 | Weather-resistant silver mirror and preparation method thereof |
| CN202256741U (en) * | 2011-09-16 | 2012-05-30 | 常州工业技术玻璃有限公司 | Reflecting Ag mirror used for solar thermal power generation |
| WO2015029746A1 (en) * | 2013-08-29 | 2015-03-05 | コニカミノルタ株式会社 | Reflecting mirror for solar thermal power generation and reflective device for solar thermal power generation |
| CN206096522U (en) * | 2016-10-27 | 2017-04-12 | 中国电力工程顾问集团西北电力设计院有限公司 | A exempt from to wash speculum for heliostat |
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