CN201973944U - Evacuated solar collector tube - Google Patents
Evacuated solar collector tube Download PDFInfo
- Publication number
- CN201973944U CN201973944U CN2010206441005U CN201020644100U CN201973944U CN 201973944 U CN201973944 U CN 201973944U CN 2010206441005 U CN2010206441005 U CN 2010206441005U CN 201020644100 U CN201020644100 U CN 201020644100U CN 201973944 U CN201973944 U CN 201973944U
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- China
- Prior art keywords
- layer
- vacuum heat
- light reflecting
- reflector layer
- collecting pipe
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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.)
- Expired - Fee Related
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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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- Optical Elements Other Than Lenses (AREA)
Abstract
The utility model discloses an evacuated solar collector tube which is suitable for solar energy heat collection; a light reflecting and corrosion resisting coating (14) with light reflection focusing function is coated in a coverage area of a backlight angle Beta of an outer layer pipe (11) of the evacuated solar collector tube; the light reflecting and corrosion resisting coating (14) comprises a light reflecting layer (15) and a corrosion resisting layer (16), wherein the light reflecting layer (15) consists of a high reflection light reflecting layer (151) and a compensating light reflecting layer (152); the high reflection light reflecting layer (151) is coated on the outer wall of the outer layer pipe (11); the compensating light reflecting layer (152) is coated on the high reflection light reflecting layer (151); and the corrosion resisting layer (16) is coated on the light reflecting layer (15). The evacuated solar collector tube makes full use of the solar energy passing through an outer layer tube and an inner layer tube of the evacuated solar collector tube, improves the photo-thermal conversion efficiency in unit area and simultaneously reduces the heat energy which is dispersed outward due to radiation in the internal layer glass tube.
Description
Technical field
The utility model relates to a kind of vacuum heat collection pipe, more particularly says, is meant a kind of solar vacuum heat-collecting pipe that is applicable to solar energy heating.
Background technology
Solar vacuum heat-collecting pipe is the original paper that the power conversion of sunshine is become heat energy, abbreviates " vacuum heat collection pipe " as.This vacuum heat collection pipe is formed (referring to shown in Figure 1, i.e. outer tube 11 and inner tube 12) by inside and outside two-layer pipe.Outer tube 11 is manufactured by the good clear glass of light transmission, sunshine is seen through smoothly, and shine on the inner tube 12.Inner tube 12 is made into by glass or metal material, and its outer surface applies sunshine absorbing material, and this absorbing material can make the transform light energy of the sunshine that shines inner tube 12 surfaces become heat energy.If being metal materials, inner tube 12 makes, the metal fin of certain width often is set on pipe, the metal fin surface also is coated with and is covered with the sunshine absorbing material, during installation, this fin surface is towards the sun, make it change into heat energy to guarantee absorbing solar energy as much as possible, and with the inside of thermal energy conduction to inner tube 12.The inside of inner tube is heat-conducting medium, is used after heat can being conducted.So inner tube 12 (including the inner tube of fin) plays the effect of two aspects: the one, the power conversion of the sun can be become heat energy, the 2nd, heat can be conducted.Intermediate layer between outer tube 11 and inner tube 12 is a vacuum layer, and its effect is outwards to scatter and disappear by the heat of the sun of inner tube 12 acquisitions is difficult.The defective of this structure is: (one) some sunshine can penetrate the space between outer tube 11 and the inner tube 12 (comprising the inner tube that has fin), this will cause the energy of part sunshine not to be fully utilized, promptly can not fully convert heat energy (referring to shown in Figure 1) to, like this, greatly reduce the interior photo-thermal conversion efficiency of unit are.(2) sunshine not line focus shine on the inner tube 12 (comprising fin), can not obtain the solar source of higher temperature.(3) inner tube can be carried out heat radiation on 360 ° of directions, causes heat to scatter and disappear.
Summary of the invention
Pass the solar energy between the two-layer pipe inside and outside the solar vacuum heat-collecting pipe in order to make full use of, improve the photo-thermal conversion efficiency of unit are, the heat that reduces simultaneously in the inner tube outwards scatters and disappears because of radiation, and the utility model provides a kind of outer wall of outer tube to possess the solar vacuum heat-collecting pipe of reflective focusing function.
A kind of vacuum heat collection pipe that is applicable to solar water heater of the present utility model, be in the coverage of the angle β backlight of the outer tube 11 of vacuum heat collection pipe, to be provided with reflective-corrosion-resistant finishes 14, this reflective-corrosion-resistant finishes 14 is made of reflector layer 15 and anti-corrosion layer 16, reflector layer 15 is coated on the outer wall of outer layer glass tube 11, and anti-corrosion layer 16 is coated on the reflector layer 15.In addition, reflector layer 15 is made up of the double layer of metal film again, promptly high reflection reflector layer 151 and compensation reflector layer 152 (referring to Fig. 3).
The material of high reflection reflector layer 151 can be aluminium, copper, silver, gold.
The material of compensation reflector layer 152 can be copper, nickel, zinc, molybdenum, chromium, magnesium or stainless steel.
The material of anti-corrosion layer 16 is aluminium nitride, alundum (Al, chrome green, silica, magnesium fluoride, titanium dioxide, nickel oxide, also can be metal-ceramic composite material, as metal-aluminium nitride composite ceramics (stainless steel-aluminium nitride, aluminium-aluminium nitride etc.), metal-silicon carbide pottery etc.
The advantage of the utility model vacuum heat collection pipe is:
1. by on the outer wall of the shady face of the outer tube of vacuum heat collection pipe, applying reflective-corrosion-resistant finishes, this coating can make full use of through the sunray between outer tube and the inner tube (containing fin), and making it to greatest extent, the ground warp reflection becomes heat energy by transform light energy.
2. apply the design of three-layer thin-film by the outer tube outer wall, make that the whole reflecting power of rete is strong, difficult drop-off, non-corrosion-vulnerable.
3. reflective-corrosion-resistant finishes is an arc curve on the vacuum tube cross section, certain reflect focalization function is arranged, the heat of radiation that can inner tube is outside reflected back inner tube surface effectively not only, and can be so that sunshine focuses on the inner tube after reflection, like this, the heat loss through radiation that not only can stop inner tube effectively, and can be by focusing on the solar source that obtains higher temperature.
Description of drawings
Fig. 1 is the cut-away view of the solar vacuum heat-collecting pipe before the utility model improves.
The cut-away view of the solar vacuum heat-collecting pipe of Fig. 2 is that outer tube of the present utility model has reflective-corrosion-resistant finishes.
Fig. 3 is the cut-away view of the amplification of outer tube of the present utility model and reflective-corrosion-resistant finishes after stretching.
Among the figure: 11. outer tube, 12. inner tube, 13. light-absorbing coatings, 14. reflective-corrosion-resistant finishes 15. reflector layers 151. high reflection reflector layer 152. compensation reflector layers 16. anti-corrosion layers
The specific embodiment
Below in conjunction with accompanying drawing the utility model is described in further detail.
Referring to shown in Figure 2, a kind of solar vacuum heat-collecting pipe of the present utility model, be in the coverage of the angle β backlight of the outer tube 11 of vacuum heat collection pipe, to be coated with the reflective-corrosion-resistant finishes 14 that possesses reflective focusing function, this reflective-corrosion-resistant finishes 14 is made of reflector layer 15 and anti-corrosion layer 16, reflector layer 15 is coated on the outer wall of outer tube 11, and anti-corrosion layer 16 is coated on the reflector layer 15.In addition, reflector layer 15 is made up of the double layer of metal film again, promptly high reflection reflector layer 151 and compensation reflector layer 152 (referring to Fig. 3).High reflection reflector layer 151 directly is coated on the outer tube 11, and be characterized in: (one) to the reflectivity height of sunshine, (two) can be attached directly to the glass surface difficult drop-off.The characteristics of compensation reflector layer 152 are: (one) has certain compensating action to the light that height reflection reflector layer can't reflect; proceed reflection; (2) be difficult for oxidized, corrosion; can reflect reflector layer 151 by the protection height, (three) all have good bonding force with high reflection reflector layer 151 and anti-corrosion layer 16.
Vacuum heat collection pipe of the present utility model has made full use of the solar energy that passes between the inside and outside two-layer pipe (inner tube 12 and outer tube 11) of solar vacuum heat-collecting pipe, improved the photo-thermal conversion efficiency under the unit are, reduced the heat energy that the heat in the inner tube 12 outwards scatters and disappears because of radiation, simultaneously, can obtain temperature higher solar energy thermal source by reflect focalization.
The adhesion of the coated designs of outer tube 11 outer walls of the present utility model (also become film system design) reflector efficiency height and glass basis is good, and stablize, be difficult for oxidation in the natural environment midium or long term, be difficult for being corroded, difficult drop-off.
In the utility model, the value of angle β backlight can be 30 °～270 °, that is to say that the coating scope that is coated in the reflective-corrosion-resistant finishes 14 on the outer wall of outer tube 11 is exactly the scope of angle backlight β correspondence, the corresponding scope of angle β backlight is a sector.
In the utility model, the material composition of high reflection reflector layer 151 is aluminium (Al), copper (Cu), silver (Ag), gold (Au).
In the utility model, the material composition of compensation reflector layer 152 is copper (Cu), nickel (Ni), zinc (Zn), molybdenum (Mo), chromium (Cr), titanium (Ti), magnesium (Mg) or stainless steel (as 1Cr18Ni9Ti).
In the utility model, the material composition of anti-corrosion layer 16 is silica (SiO
2), magnesium fluoride (MgF
2), aluminium nitride (AlN), alundum (Al (Al
2O
3) or chrome green (Cr
2O
3), titanium dioxide (TiO
2), it also can be metal-ceramic composite material, (composite ceramic material of metal-SiC) also has metal-alundum (Al composite ceramics, metal-chrome green composite ceramic material etc. as the stainless steel-aluminium nitride in metal-aluminium nitride (SS-AlN), aluminium-aluminium nitride (Al-AlN) and metal-silicon carbide.
More than the material of each layer can be designed to different combinations according to demand.As long as between layer and the layer mutually burn into react and influence reflective, the corrosion resistance of rete.
In the utility model, span for angle β backlight can have specific angle according to demand: as angle β backlight is that 60 °, angle β backlight are that 90 °, angle β backlight are that 105 °, angle β backlight are that 180 °, angle β backlight are that 210 °, angle β backlight are that 240 °, angle β backlight are that 150 °, angle β backlight are that 120 °, angle β backlight are 270 °, in such angle backlight β scope, make reflective-corrosion-resistant finishes 14 and more help transform light energy and become heat energy, make the photo-thermal conversion ratio of vacuum tube be improved.
Embodiment 1
Solar vacuum heat-collecting pipe of the present utility model, as shown in Figures 2 and 3, its structure is on the outer wall of outer tube 11, in the one side back to sunshine, angle β backlight is in 180 ° the scope, is coated with the mode of magnetron sputtering and is covered with reflective-corrosion-resistant finishes 14.Specifically be coated with and be covered with a kind of composite coating.The internal layer of composite coating, what promptly be attached directly to outer tube 11 outer surfaces is high reflection reflector layer 151, its effect is to pass on the heat absorbing coating 13 of outer wall that infrared heat energy that light between outer tube 11 and the inner tube 12 and inner tube 12 give off reflexes to inner tube 12, make it continue absorption and be converted to heat energy, this coating is metallic aluminium (Al) coating 151, the characteristics of aluminium (Al) coating are: reflecting effect is good and glassy bond power is strong.Then, continue the method coated compensate reflector layer 152 with magnetron sputtering, this coating is metallic copper (Cu) coating 152.Copper coating is coating under vacuum condition, can be with above-mentioned aluminized coating combination very firm.Also can with outermost anti-corrosion layer, promptly the metal-ceramic composite bed in conjunction with very firm.And in case at certain in particular cases, outmost metal-ceramic composite bed comes off, and the outer surface of metallic copper coating 152 forms cupric oxide (CuO) easily, is equivalent to and forms the new ceramic layer of one deck, can continue to protect reflector layer not come off.Then, continue to apply anti-corrosion layer 16 with the method for magnetron sputtering, this anti-corrosion layer 16 is metal-ceramic composite beds again.Its main component is stainless steel-aluminium nitride (SS-AlN) and aluminium-aluminium nitride (Al-AlN), promptly has in the aluminium nitride in a certain proportion of stainless steel particle and the aluminium nitride a certain proportion of aluminum particulate is arranged.The non-normal temperature of the chemical property of this anti-corrosion layer 16, and comparatively robust is incrust, be not vulnerable to oxidation in normal weather, is not subject to the erosion of acid, alkali.Can protect its inner reflector layer 15 for a long time effectively.In general, reflective-anti-corrosion layer has following effect: after (1) outer layer glass tube is coated with and is covered with the reflecting layer, possess certain reflect focalization function, focus light rays on the inner layer glass tube after, by the solar energy that the photo-thermal conversion absorbs, can obtain the thermal source of higher temperature.(2) the heat radiation heat radiation with inner tube 12 reflexes on the inner tube tube wall, reduces heat waste.(3) make full use of through the light between inner tube and the outer tube, make it to convert to as much as possible heat energy.
The technology that making the utility model vacuum heat collection pipe outer wall coating is adopted can be produced on coating material on the outer wall of solar vacuum heat-collecting pipe outer layer glass tube with modes such as magnetron sputtering, vacuum coatings.
The utility model is coated with at the outer surface of the outer layer glass tube of vacuum heat collection pipe and is covered with reflective-corrosion-resistant finishes 14, be the coating of composite construction, can increase substantially the photo-thermal conversion ratio of vacuum tube, and, utilize the reflect focalization characteristic of coating formation, can obtain the solar source of higher temperature.
Claims (9)
1. solar vacuum heat-collecting pipe that is applicable to solar energy heating, it is characterized in that: be to be provided with a reflective corrosion-resistant finishes (14) in the coverage of angle β backlight of outer tube (11) at solar vacuum heat-collecting pipe, this reflective corrosion-resistant finishes (14) is made of reflector layer (15) and anti-corrosion layer (16), reflector layer (15) is made up of height reflection reflector layer (151) and compensation reflector layer (152) again, high reflection reflector layer (151) is coated on the outer wall of outer tube (11), compensation reflector layer (152) is coated on the high reflection reflector layer (151), and anti-corrosion layer (16) is coated on the reflector layer 15.
2. a kind of solar vacuum heat-collecting pipe that is applicable to solar energy heating according to claim 1 is characterized in that: the material of high reflection reflector layer (151) is aluminium, copper, silver, gold.
3. a kind of solar vacuum heat-collecting pipe that is applicable to solar energy heating according to claim 1 is characterized in that: the material of compensation reflector layer (152) is copper, nickel, zinc, molybdenum, chromium, magnesium, stainless steel.
4. a kind of solar vacuum heat-collecting pipe that is applicable to solar energy heating according to claim 1 is characterized in that: the material of anti-corrosion layer (16) is aluminium nitride, alundum (Al, chrome green, silica, magnesium fluoride, titanium dioxide, nickel oxide, metal-aluminium nitride composite ceramics, metal-silicon carbide composite ceramics, metal-alundum (Al composite ceramics, metal-chrome green composite ceramics.
5. a kind of solar vacuum heat-collecting pipe that is applicable to solar energy heating according to claim 1 is characterized in that: angle β backlight is 30 °～270 °.
6. a kind of solar vacuum heat-collecting pipe that is applicable to solar energy heating according to claim 1 is characterized in that: angle β backlight is 240 °.
7. a kind of solar vacuum heat-collecting pipe that is applicable to solar energy heating according to claim 1 is characterized in that: angle β backlight is 120 °.
8. a kind of solar vacuum heat-collecting pipe that is applicable to solar energy heating according to claim 1 is characterized in that: angle β backlight is 150 °.
9. a kind of solar vacuum heat-collecting pipe that is applicable to solar energy heating according to claim 1 is characterized in that: angle β backlight is 180 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206441005U CN201973944U (en) | 2010-12-07 | 2010-12-07 | Evacuated solar collector tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206441005U CN201973944U (en) | 2010-12-07 | 2010-12-07 | Evacuated solar collector tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201973944U true CN201973944U (en) | 2011-09-14 |
Family
ID=44579043
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206441005U Expired - Fee Related CN201973944U (en) | 2010-12-07 | 2010-12-07 | Evacuated solar collector tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201973944U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102494419A (en) * | 2011-12-29 | 2012-06-13 | 中国华能集团清洁能源技术研究院有限公司 | Novel solar medium and low-temperature heat collection rack pipes |
| CN102748885A (en) * | 2012-07-13 | 2012-10-24 | 四川川能农业开发有限公司 | Manufacturing process of stainless steel aluminum nitride double-layer ceramic coated whole glass evacuated collector tube |
-
2010
- 2010-12-07 CN CN2010206441005U patent/CN201973944U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102494419A (en) * | 2011-12-29 | 2012-06-13 | 中国华能集团清洁能源技术研究院有限公司 | Novel solar medium and low-temperature heat collection rack pipes |
| CN102748885A (en) * | 2012-07-13 | 2012-10-24 | 四川川能农业开发有限公司 | Manufacturing process of stainless steel aluminum nitride double-layer ceramic coated whole glass evacuated collector tube |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110914 Termination date: 20111207 |