CN202581854U - Full-glass evacuated collector tube with high emissivity and low air drying temperature - Google Patents
Full-glass evacuated collector tube with high emissivity and low air drying temperature Download PDFInfo
- Publication number
- CN202581854U CN202581854U CN2012202316448U CN201220231644U CN202581854U CN 202581854 U CN202581854 U CN 202581854U CN 2012202316448 U CN2012202316448 U CN 2012202316448U CN 201220231644 U CN201220231644 U CN 201220231644U CN 202581854 U CN202581854 U CN 202581854U
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- glass tube
- tube
- inner glass
- emissivity
- full
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- 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
- Y02E10/44—Heat exchange systems
Abstract
The utility model provides a full-glass evacuated collector tube with high emissivity and low air drying temperature, which is concentrically manufactured by sealing and connecting a cover glass tube and an inner glass tube, a film layer with the emissivity higher than 0.35 is contained on the outer surface of the inner glass tube; or the film layer is not deposited on the part of region of the outer surface of the inner glass tube. The full-glass evacuated collector tube has the beneficial effects that the air drying temperature is reduced by improving the full-glass evacuated collection and utilizing the emissivity of an element absorbing body, for example, a non-coating film area with about 140-degree angle of circumference is formed on the outer surface of the inner glass tube, and the air drying temperature of a heat collecting element is reduced greatly by utilizing the 92% of the emissivity of boron-silicon glass 3.3.
Description
Technical field
The utility model relates to the all-glass vacuum thermal-collecting tube that temperature is shone in the high emissivity low latitude.
Background technology
Existing all-glass vacuum thermal-collecting tube; The heat collector tube pipe that comprises heat pipe and the integrated making of inner glass tube; Have high absorptivity and extremely low emissivity, when obtaining gratifying solar collecting performance and heat-collecting temperature, the empty temperature of shining is reached more than 230 ℃.High like this sky shines temperature can bring the too high problem of heat-pipe working medium vapour pressure of integrated making.
Summary of the invention
The purpose of the utility model is to provide the high emissivity low latitude to shine the all-glass vacuum thermal-collecting tube of temperature.
The utility model solves the technical scheme that its technical problem is taked: with cover glass tube and the concentric sealing-in of inner glass tube; Process the all-glass vacuum thermal-collecting tube that temperature is shone in high emissivity low latitude, and make said inner glass tube outer surface contain emissivity being higher than 0.35 rete; Perhaps, to the subregion of said inner glass tube outer surface depositional coating not.
Can also make the inner glass tube outer surface contain emissivity and be higher than 0.45 rete.
Can also make the inner glass tube outer surface contain continuous no depositional coating zone less than 180 degree angles of circumference.
Can also adopt glass heat pipe with the integrated making of inner glass tube.
The beneficial effect of the utility model: utilize the emissivity of element absorber to reduce the empty temperature of shining through improving all glass vacuum heat collecting; For example make the inner glass tube outer surface form the no coating film area of about 140 degree angles of circumference; Utilize the emissivity of borosilicate 3.3 glass 92% itself, the sky that reduces significantly heat collecting element shines temperature.When using water as heat-pipe working medium, when empty solarization temperature was 160 ℃, vapour pressure was 6 atmospheric pressure, reduced nearly 4/5ths than empty 29 atmospheric pressure nearly that shine 230 ℃ of temperature of script.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is further specified.
Fig. 1 is the not composite construction sketch map of plated film all-glass vacuum heat collector tube pipe of an inner glass tube part outer surface.
1. cover glass tubes among the figure; 2. inner glass tube; 3. vacuum heat-insulating layer; 4. coating film area not; 5. cold junction.
The specific embodiment
Fig. 1 provides an embodiment of the utility model.
Among Fig. 1, be connected to form a chuck with one heart, the interlayer of said chuck vacuumized form a vacuum heat-insulating layer 3, process an all-glass vacuum thermal-collecting tube with cover glass tube 1 and inner glass tube 2.The shady face of inner glass tube 2 outer surfaces contains the not coating film area 4 of having an appointment 140 degree angles of circumference, representing with two-wire.The side to light depositional coating of inner glass tube 2, promptly usually said selective absorbing film.Inner glass tube 2 melt the envelope place stretch out one section and the sealing, inner glass tube 2 inside vacuumize can working medium and a heat pipe is processed in sealed-off.
The operation principle of Fig. 1 embodiment: sunlight passes cover glass tube 1 and on inner glass tube 2 retes, converts heat energy into, and these heat energy are exported through cold junction 5 with the two phase flow endless form by the working medium of inside heat pipe.During normal thermal-arrest, through inner glass tube 2 not coating film area 4 radiation heat energy seldom.During empty the solarization, inner glass tube 2 surface temperatures are very high, at this moment, through emissivity be 92% inner glass tube 2 not the heat energy of coating film area 4 radiation increase.A large amount of radiation of heat energy are represented in the below of compound cross-section among Fig. 1 with three arrows.This has just limited the excessive rising of empty solarization temperature, and makes the steam pressure of inside heat pipe be unlikely to too high.
Adopt the rete of high emissivity to replace not coating film area, also can obtain the empty effect of shining temperature of similar reduction.
Sometimes, anti-empty solarization requires of crucial importance, at this moment, even the heat collecting element absorptivity is hanged down some and emissivity is high a lot, also can tolerate.The rete of high emissivity can directly obtain through adjusting process on existing coating machine.
Claims (4)
1. the all-glass vacuum thermal-collecting tube of temperature is shone in the high emissivity low latitude, is processed by cover glass tube and the concentric sealing-in of inner glass tube, it is characterized in that said inner glass tube outer surface contains emissivity and is higher than 0.35 rete; Perhaps, to the subregion of said inner glass tube outer surface depositional coating not.
2. the all-glass vacuum thermal-collecting tube of temperature is shone in high emissivity according to claim 1 low latitude, is connected with inner glass tube by cover glass tube and processes, and it is characterized in that the inner glass tube outer surface contains emissivity and is higher than 0.45 rete.
3. the all-glass vacuum thermal-collecting tube of temperature is shone in high emissivity according to claim 1 low latitude, is connected with inner glass tube by cover glass tube and processes, and it is characterized in that the inner glass tube outer surface contains the continuous no depositional coating zone less than 180 degree angles of circumference.
4. shine the all-glass vacuum thermal-collecting tube of temperature according to claim 1 or 2 or 3 or 4 or 5 described high emissivity low latitudes, it is characterized in that containing glass heat pipe with the integrated making of inner glass tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202316448U CN202581854U (en) | 2012-05-18 | 2012-05-18 | Full-glass evacuated collector tube with high emissivity and low air drying temperature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202316448U CN202581854U (en) | 2012-05-18 | 2012-05-18 | Full-glass evacuated collector tube with high emissivity and low air drying temperature |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202581854U true CN202581854U (en) | 2012-12-05 |
Family
ID=47251258
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012202316448U Expired - Fee Related CN202581854U (en) | 2012-05-18 | 2012-05-18 | Full-glass evacuated collector tube with high emissivity and low air drying temperature |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202581854U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103225892A (en) * | 2013-04-22 | 2013-07-31 | 施侃超 | Pressure reducing air sunning protecting all-glass vacuum heat pipe solar heat collection device |
| CN103423898A (en) * | 2012-05-18 | 2013-12-04 | 徐秀萍 | High-emissivity low-stagnation-temperature all-glass evacuated collector tube |
-
2012
- 2012-05-18 CN CN2012202316448U patent/CN202581854U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103423898A (en) * | 2012-05-18 | 2013-12-04 | 徐秀萍 | High-emissivity low-stagnation-temperature all-glass evacuated collector tube |
| CN103225892A (en) * | 2013-04-22 | 2013-07-31 | 施侃超 | Pressure reducing air sunning protecting all-glass vacuum heat pipe solar heat collection device |
| CN103225892B (en) * | 2013-04-22 | 2016-01-20 | 施侃超 | Decompression empty sun protection all-glass vacuum hot pipe solar heat collector |
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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: 20121205 Termination date: 20140518 |