CN104441840B - A kind of solar thermal collector safety glass transparent cover plate - Google Patents
A kind of solar thermal collector safety glass transparent cover plate Download PDFInfo
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- CN104441840B CN104441840B CN201310444470.2A CN201310444470A CN104441840B CN 104441840 B CN104441840 B CN 104441840B CN 201310444470 A CN201310444470 A CN 201310444470A CN 104441840 B CN104441840 B CN 104441840B
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- safety glass
- cover plate
- transparent cover
- insulation layer
- thermal insulation
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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 present invention relates to a kind of solar thermal collector safety glass transparent cover plate, and the manufacture method of safety glass transparent cover plate for this kind of solar thermal collector. Described a kind of solar thermal collector has multilayer coating with safety glass transparent cover plate, and its structure is for having successively safety glass, thermal insulation layer and top layer; Described thermal insulation layer is nickel-phosphorus alloy; Described top layer is the layer of DLC glassy layer, DLC carbon-coating or DLC glass and the alternately laminated formation of diamond-like-carbon; Described solar thermal collector is simple by safety glass transparent cover plate manufacturing process, and product selection range is wide, and light-thermal transition efficiency is high, long service life.
Description
Technical field
The present invention relates to a kind of solar thermal collector safety glass transparent cover plate, particularly one has thermal insulation layerSolar thermal collector safety glass transparent cover plate.
Background technology
The basic element of character of solar water heater comprises several parts such as absorber plate, transparent cover plate, thermal insulation layer and shell.The Main Function of transparent cover plate is ensureing to protect absorber plate under the prerequisite that solar radiation effectively sees through, with anti-grayThe erosion such as dirt, sleet absorber plate causes its damage. The material that can be used for manufacturing transparent cover plate mainly contains two large classes,Be glass epoxy and safety glass.
Glass epoxy basic structure is that glass fibre strengthens transparent resin plate, and its advantage mainly comprises light weight, Yi JiaWork moulding, thermal conductivity is little, resistance to impact is strong etc. But resin base material under long-term illumination, ultraviolet lighting particularlyPenetrate down and be easy to agingly, cause the degraded of resin material, not only affect its mechanical property, also cause glass epoxy to becomeYellow, light transmission efficiency reduces.
Low iron safety glass for safety glass multiselect, its light transmission is good, weatherability is strong. But the heat conduction of glass materialRate is high, is difficult to heat energy to be stored in solar thermal collector inside, causes sunshine heat collector light-thermal conversion efficiencyReduce; On the other hand, common silicate-based glasses wearability, corrosion-resistant, be difficult to resist scraping of dustThe corrosion of acid-base material to it in mill and rainwater, result is also to cause transparent cover plate light transmission efficiency to reduce.
Summary of the invention
For the defect of safety glass transparent cover plate in prior art, the present invention proposes following solution,A kind of solar thermal collector safety glass transparent cover plate is provided, has multilayer coating, its structure is tool successivelyThere are safety glass, thermal insulation layer and top layer. Described thermal insulation layer is nickel-phosphorus alloy. Described top layer is DLC glassThe layer of layer, DLC carbon-coating or DLC glass and the alternately laminated formation of diamond-like-carbon.
The method that has been widely used chemical plating in this area is prepared nickel-phosphorus alloy coating, and gained coating uniformity is good,Tack is strong, wearability and corrosion resistance higher. The inventor surprisingly finds, by increasing on safety glassOne deck nickel-phosphorus alloy coating, not only can effectively improve safety glass such as the performance such as wearability, corrosion resistance,Can significantly reduce the thermal conductivity of the safety glass with this coating, thereby effectively suppressed solar energy heating simultaneouslyDevice internal heat energy is scattered and disappeared by transparent cover plate.
Chemical plating nickel-phosphorus alloy can adopt the method for this area routine to carry out. Traditional chemical plating formula comprises sulfuric acidNickel, sodium dihydrogen phosphate and additive, stabilizing agent etc., generally in (55-70) ± 2 DEG C, pH5.0-6.5 barUnder part, realize. Thickness of coating can the mode such as periodically be added by chemical plating time and coating raw material and realize, thisThe technical operation being well known to the skilled person, the general chemical plating time is 0.5-2.5h, plating solution is formerMaterial is periodically added 2-8 time.
The thickness of thermal insulation layer is most important for its light transmission of balance and thermal conductivity. Coating is blocked up, although thermal conductivityDecline, but light transmission also declines thereupon; Thickness of coating deficiency, is difficult to effectively reduce the thermal conductivity of safety glass.Thickness of coating generally should be controlled within the scope of 8-22 μ m, preferred 9-18 μ m, further preferred 10-12 μ m.
In thermal insulation layer, nickel-phosphorus coating preferably forms multiple independently interval by lithographic method. So, in heat insulationWhile covering top layer again on layer, part skin-material can directly contact with safety glass substrate, thereby by nickel phosphor platingLayer is divided into multiple independently interval, has not only improved the fastness of coating, has also ensured indivedual interval the meeting with of coatingAfter destroying, it still can maintain the state of sealing with interval, thereby has extended the life-span of coating. Gap can lead toCross complete thermal insulation layer etching is formed, the preferred 0.5-1.5 μ of gap width m, described etching can be used abilityThe method that territory is conventional, such as holographic laser etching (HLE), sputter and ion beam milling erosion (SIME), high pressure etc.Ion etching (HPPE), reactive ion etching (RIE) etc.
Top layer is positioned at the contrary side with safety glass substrate of thermal insulation layer, plays and protects thermal insulation layer, reduces steel simultaneouslyChange the effect of glass self-explosion rate. Its constituent material comprises plasma polymer layer, is specifically as follows DLCGlass (DLG) or diamond-like-carbon (DLC).
DLC glass (DLG) is the glass that is substantially amorphous state being made up of carbon and silicon, can be optionalContain hetero atoms such as hydrogen, nitrogen, oxygen, fluorine; Diamond-like-carbon (DLC) is mainly by carbon atom and hydrogen atomForm. DLG and DLC molecular structure stabilized, have good rigidity, wearability and corrosion resistance, even if makeAlso can effectively prevent that with very thin coating sand and dust etc. from scratching the corruption to safety glass such as safety glass or soda acidErosion.
The preparation method of DLG and DLC layer can realize according to method well-known to those skilled in the art, for exampleDisclosed method in US Patent No. 2007/0020451A1.
Top layer can comprise one deck DLG or DLC, also can be the multilayer top layer that DLG and DLC alternately form. Top layerThe preferred 100-300nm of thickness, further preferably 150-200nm.
Solar thermal collector involved in the present invention can be prepared as follows with safety glass transparent cover plate:
(1) safety glass is cleaned;
(2) on safety glass, the method by chemical plating forms nickel-phosphorus coating, is thermal insulation layer;
(3) thermal insulation layer is carried out to etching, thermal insulation layer is divided into multiple separate intervals;
(4) above thermal insulation layer, generate top layer.
Wherein, the formula of chemical plating fluid is NiSO4·6H2O25g/L、NaH2PO425g/L, sodium acetate 15g/L,Stabilizing agent 5mg/L, technological temperature 55-70 DEG C, pH5.0-6.5, the chemical plating time is 0.5-2.5h, plating solutionRaw material is periodically added 2-8 time.
Beneficial effect
Transparent cover plate of the present invention uses multilayer coating, under the prerequisite slightly increasing, has significantly reduced at production costThereby the thermal conductivity of transparent cover plate has improved the light-thermal conversion rate of solar thermal collector, extended product simultaneouslyService life, its beneficial effect comprises:
1. can use and on market, be easy to buying, any kind safety glass with low cost as basis, by everyThermosphere reduces its thermal conductivity;
Use top layer protected thermal insulation layer and safety glass simultaneously, top layer between the gap of thermal insulation layer with temperingGlass directly contacts, and thermal insulation layer is divided into multiple intervals, protection respectively, has further extended its life-span.
3. thermal insulation layer and top layer cooperatively interact, and the life-span and the light-Re that have jointly improved solar panel change effectRate.
Brief description of the drawings
Fig. 1 is structural representation of the present invention.
In figure, 1, safety glass, 2, thermal insulation layer, 3-1, DLC carbon-coating, 3-2, DLC glassLayer.
Detailed description of the invention
Embodiment 1
With reference to Fig. 1, the transparent cover plate that a kind of solar thermal collector uses, its structure is for having successively safety glass1, thermal insulation layer 2 and top layer 3. Described thermal insulation layer 2 is nickel-phosphorus alloy, and described top layer 3 has one deck diamond-likeStone carbon-coating 3-1 and one deck DLC glassy layer 3-2.
Described transparent cover plate can adopt following raw material and processing step to be prepared from:
(1) prepare the low iron armorplate glass of 10mm, and clean;
(2) on low iron safety glass, form the nickel-phosphorus coating that thickness is 11 μ m, the formula of chemical plating fluid is
NiSO4·6H2O25g/L、NaH2PO425g/L, sodium acetate 15g/L, stabilizing agent 5mg/L, concrete workSkill condition is that temperature 60 C, pH are 5.5, and chemical plating time 1.5h periodically adds plating solution raw materials 4 times,Obtain thermal insulation layer;
(3) with high pressure plasma etching (HPPE), thermal insulation layer is carried out to etching, thermal insulation layer is divided into multipleSeparate interval, the clearance control in each interval is at 1 μ m;
(4) above thermal insulation layer, generate top layer, on thermal insulation layer, form successively one deck DLC carbon-coating 3-1With one deck DLC glassy layer 3-2, two-layer thickness is all controlled at 90nm, and top layer gross thickness is 180nm.
Embodiment 2
Only be with the difference of embodiment 1, use the low iron safety glass of 20mm of identical material, all the other withStep is identical.
Comparative example 1
Copy embodiment 1, adopt the low iron safety glass of 10mm of identical material, only carry out the step of embodiment 1Suddenly (1) and (4).
Comparative example 2
Copy embodiment 2, adopt the low iron safety glass of 20mm of identical material, only carry out the step of embodiment 1Suddenly (1) and (4).
Measure transparent cover plate light transmittance with BTC-3 type transmission of visible light tester. By quasi-steady state heat transfer through plane wallDetermination method is measured transparent cover plate thermal conductivity factor U value. The results are shown in table 1.
Table 1
| Light transmittance (%) | U value (W/M2·K) | |
| Embodiment 1 | 89.0 | 5.50 |
| Embodiment 2 | 84.5 | 5.49 |
| Comparative example 1 | 89.5 | 5.60 |
| Comparative example 2 | 86.1 | 5.52 |
Test data by table 1 can be determined, by using thermal insulation layer, the thick tempering of 10mm of same materialThe in the situation that glass transparent cover plate reducing (reducing by 0.56%) slightly at light transmittance, its thermal conductivity factor significantly reduces(reduce by 1.79%), meets or exceeds 20mm and does not possess the safety glass transparent cover plate correspondence of thermal insulation layerEnergy. Taking the thick safety glass of 20mm as base material, although can obtain the more transparent cover plate of low thermal conductivity,Its light transmittance also significantly declines. To sum up analysis is visible, by increasing thermal insulation layer, and can the lower steel of used thicknessChange glass and prepare transparent cover plate, thereby effectively improve the heat insulation of transparent cover plate under the prerequisite that ensures light transmittanceProperty, finally improve the light-thermal conversion rate of solar thermal collector, be also conducive to the reduction of product weight, just simultaneouslyIn transport and installation.
Claims (8)
1. a solar thermal collector safety glass transparent cover plate, is characterized in that, described solar energy heatingDevice has multilayer coating with safety glass transparent cover plate, and its structure is for having successively safety glass, thermal insulation layer and tableLayer,
Described thermal insulation layer is nickel-phosphorus alloy,
Described top layer is DLC glassy layer, DLC carbon-coating or DLC glass and diamond-like-carbonThe layer of alternately laminated formation.
2. solar thermal collector according to claim 1 safety glass transparent cover plate, is characterized in that,Described thermal insulation layer thickness is 8-22 μ m.
3. solar thermal collector according to claim 1 safety glass transparent cover plate, is characterized in that,Described thermal insulation layer forms multiple independently interval by lithographic method, described lithographic method comprises holographic laser etching(HLE), sputter and ion beam milling erosion (SIME), high pressure plasma etching (HPPE), reactive ion etching (RIE).
4. solar thermal collector according to claim 1 safety glass transparent cover plate, is characterized in that,Described top layer was formed by DLC glassy layer and stacked adding of diamond-like-carbon.
5. solar thermal collector according to claim 1 safety glass transparent cover plate, is characterized in that,The thickness on described top layer is 100-300nm.
6. the system with safety glass transparent cover plate according to the solar thermal collector described in claim 1-5 any onePreparation Method, is characterized in that, concrete steps are
(1) safety glass is cleaned;
(2) on safety glass, the method by chemical plating forms nickel-phosphorus coating, is thermal insulation layer;
(3) thermal insulation layer is carried out to etching, thermal insulation layer is divided into multiple separate intervals;
(4) above thermal insulation layer, generate top layer.
7. the preparation method of safety glass transparent cover plate for solar thermal collector according to claim 6,It is characterized in that, the chemical plating process condition of described step (2) is
The formula of chemical plating fluid: NiSO4·6H2O25g/L、NaH2PO425g/L, sodium acetate 15g/L, steadyDetermine agent 5mg/L, temperature 55-70 DEG C, pH5.0-6.5.
8. the preparation method of safety glass transparent cover plate for solar thermal collector according to claim 6,It is characterized in that, the chemical plating time of described step (2) is 0.5-2.5h, and plating solution raw materials is periodically added 2-8Inferior.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310444470.2A CN104441840B (en) | 2013-09-23 | 2013-09-23 | A kind of solar thermal collector safety glass transparent cover plate |
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| CN201310444470.2A CN104441840B (en) | 2013-09-23 | 2013-09-23 | A kind of solar thermal collector safety glass transparent cover plate |
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| CN104441840A CN104441840A (en) | 2015-03-25 |
| CN104441840B true CN104441840B (en) | 2016-05-11 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4361630A (en) * | 1979-04-20 | 1982-11-30 | The United States Of America As Represented By The Secretary Of The Commerce | Ultra-black coating due to surface morphology |
| CN2539105Y (en) * | 2001-09-27 | 2003-03-05 | 高纪凡 | High-vacuum degree glass cover plate for solar plane heat collector |
| CN101228217A (en) * | 2005-07-20 | 2008-07-23 | 3M创新有限公司 | Moisture barrier coatings |
| CN102126831A (en) * | 2010-11-29 | 2011-07-20 | 常州国基能源科技有限公司 | Cover plate glass of solar receiver and preparation method thereof |
-
2013
- 2013-09-23 CN CN201310444470.2A patent/CN104441840B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4361630A (en) * | 1979-04-20 | 1982-11-30 | The United States Of America As Represented By The Secretary Of The Commerce | Ultra-black coating due to surface morphology |
| CN2539105Y (en) * | 2001-09-27 | 2003-03-05 | 高纪凡 | High-vacuum degree glass cover plate for solar plane heat collector |
| CN101228217A (en) * | 2005-07-20 | 2008-07-23 | 3M创新有限公司 | Moisture barrier coatings |
| CN102126831A (en) * | 2010-11-29 | 2011-07-20 | 常州国基能源科技有限公司 | Cover plate glass of solar receiver and preparation method thereof |
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| CN104441840A (en) | 2015-03-25 |
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Granted publication date: 20160511 Termination date: 20190923 |