CN204854020U - Novel through type double glazing evacuated collector tube - Google Patents
Novel through type double glazing evacuated collector tube Download PDFInfo
- Publication number
- CN204854020U CN204854020U CN201520295192.3U CN201520295192U CN204854020U CN 204854020 U CN204854020 U CN 204854020U CN 201520295192 U CN201520295192 U CN 201520295192U CN 204854020 U CN204854020 U CN 204854020U
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- glass
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- expansion
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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
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Abstract
The utility model discloses a novel through type double glazing evacuated collector tube, including glass outer tube, vacuum layer, selective absorbing coating, glass inner tube. The glass outer tube adopts the higher glass material of coefficient of expansion, and the glass inner tube adopts the lower glass material of coefficient of expansion for the swelling capacity that balanced glass outer tube and glass inner tube produced because of the difference in temperature. And in the junction of glass outer tube with the glass inner tube, adopt excessive glass material, further the difference of balanced swelling capacity. The utility model discloses from two aspect while majorized set heat pipes of structural design and material, prevent that the thermal -collecting tube from bursting, improve the reliability and stability of thermal -collecting tube.
Description
Technical field
The utility model relates to Application of Solar Energy field, particularly a kind of Novel direct general formula double-glass vacuum heat-collecting tube.
Background technology
Solar energy is clean as one, free of contamination regenerative resource, and its development and utilization is considered to the important component part of world energy sources strategy.Solar water has utilized technology widely, and wherein most crucial parts are thermal-collecting tubes.
The thermal-collecting tube used in the market mostly is the double glazing tubular construction that one end is closed, and be vacuum chamber between outer glass tube and glass inner tube, the outer surface of glass inner tube scribbles solar selectively absorbing coating.During this all-glass vacuum thermal-collecting tube work, inner and outer pipes temperature difference is comparatively large, easily produces booster; And this thermal-collecting tube is single-ended hatch frame, the water in interior pipe can only rely on the convection current caused because of the temperature difference to produce circulation, and heat exchange efficiency is not high.
Chinese patent CN201120553565.4 discloses a kind of straight way type solar collector tube, belongs to field of solar energy, and described straight way type solar collector tube comprises outer glass tube, metal inner pipe, end cap, bellows, kovar alloy ring, shade and getter device,
CN200810019640.1 discloses a kind of Straightthrough type double glazing vacuum solar heat collection tube, comprise glass inner tube and be arranged at the outer glass tube outside this glass inner tube, this glass inner tube open at both ends, this glass inner tube outer surface is provided with solar selectively absorbing coating, it is vacuum space between this glass inner tube and outer glass tube, getter can be set in vacuum space, between the shady face and outer glass tube of this glass inner tube, be provided with light gathering reflector element, this Straightthrough type double glazing vacuum solar heat collection tube is also provided with telescopic joint.
Two patents more than announced, can reduce the probability of glass tube explosion to a certain extent, but under long-term operating condition, the also explosion of the long-living glass tube of possibility.The utility model, from the viewpoint of structural design, material two, proposes a kind of Novel direct general formula double-glass vacuum heat-collecting tube, effectively can solve the situation of glass tube explosion, and under longtime running operating mode, stable performance.
Utility model content
Technical problem: the purpose of this utility model is the defect overcoming above-mentioned existing relevant episode heat pipe, provides a kind of Novel direct general formula double-glass vacuum heat-collecting tube, can effectively solve thermal-collecting tube and break, and improve the thermal efficiency.
Technical scheme: adopt as solving the problems of the technologies described above, provides a kind of Novel direct general formula double-glass vacuum heat-collecting tube, comprises outer glass tube, vacuum layer, coating for selective absorption, glass inner tube.
Described outer glass tube be made up of the glass that the coefficient of expansion is higher, and transmissivity is high, allows solar energy inject as much as possible.Outer glass tube mainly plays vacuum and protective effect.
Described vacuum layer is the space between glass inner tube and outer glass tube, and adopt application of vacuum, effectively can reduce heat waste, when solar light enters outer glass tube, be radiated in glass inner tube, vacuum layer can stop hot loss of energy effectively.
Described coating for selective absorption is the outer surface being coated in glass inner tube, pipe absorptivity in improving, and then the thermal efficiency improving system.
Described glass inner tube is made up of the glass that the coefficient of expansion is lower, and when working medium is in glass inner tube internal flow, the temperature of generation is higher than the temperature of outer tube, and like this, outer glass tube and glass inner tube produce temperature difference, is easy to produce explosion.The glass inner tube coefficient of expansion that the utility model adopts is low.The outer tube coefficient of expansion is high, like this, when the temperature of interior pipe temperature higher than outer glass tube, effectively can reduce swell increment, prevents glass inner tube or outer glass tube explosion.
The utility model adopts subregion to use material, in I district, II district and III district, adopts the glass material of unlike material respectively.
I district is glass inner tube, II district outer glass tube and glass inner tube junction, III district mainly outer glass tube mainly, when solar light is radiated on thermal-collecting tube, first arrive on the outer glass tube in III district, light therethrough III district, through vacuum layer, be radiated on the selective coating on glass inner tube surface, I district, the working medium of heating glass inner tube flowing.Under running conditions, the temperature in I district is greater than the temperature in III district to thermal-collecting tube, and II district connects I district and III district, is temperature transition district.Therefore, being chosen as of material: the glass material that the coefficient of expansion is lower is selected in I district, when temperature raises, the coefficient of expansion is also less, the glass material that the coefficient of expansion is higher is selected in III district, like this, though glass inner tube and outer glass tube to produce the temperature difference comparatively large, the swell increment that reduction that also can be suitable is caused by the temperature difference.II district is the transition region in I district and III district, in the selection of material, selects the glass material that the coefficient of expansion is moderate.The excess material design in II district, is conducive to the swell increment reducing glass inner tube and outer glass tube on the one hand, is conducive to manufacture craft design on the other hand.
The technology that the utility model is not particularly limited is prior art.
Beneficial effect:
1) in, pipe and outer tube all use glass material, are vacuum between outer glass tube and glass inner tube, and with traditional metal inner pipe compared with outer glass tube structure, technology is simple, with low cost, can mass market;
2) outer glass tube and glass inner tube two-port adopt special version, absorbed glass outer tube and glass inner tube swell increment inconsistent and cause rupture event;
3) relative to the structure of an end closure form, the two-port bypass structure coefficient of heat transfer that the utility model adopts is higher;
4) the utility model adopts active cycle, and heat exchange efficiency is higher.
Accompanying drawing explanation
Fig. 1 is the utility model thermal-collecting tube structural representation;
Fig. 2 is thermal-collecting tube port organization schematic diagram;
Fig. 3 is the utility model street heat pipe profile;
Fig. 4 is the utility model application example schematic diagram;
Wherein: 1 be outer glass tube, 2 are vacuum layer, 3 are coating for selective absorption, 4 is glass inner tube.
Detailed description of the invention
See Fig. 1 to Fig. 4, a kind of Novel direct general formula double-glass vacuum heat-collecting tube, comprises outer glass tube 1, vacuum layer 2, coating for selective absorption 3, glass inner tube 4.
Described outer glass tube 1 is made up of the glass material that the coefficient of expansion is higher, and it is high to project coefficient, allow as much as possible solar energy through.
Described vacuum layer 2 is that after outer glass tube 1 seals with glass inner tube 4, outer glass tube 1 and glass inner tube 4 are concentric circles, forms double wall glass straight pipe, both ends open after sealing.Vacuum layer 2 can effectively reduce heat waste, when sunray is radiated on outer glass tube 1, most light is through outer glass tube 1, and through vacuum layer 2, arrive on glass inner tube 4 outer surface, when sunray is irradiated in glass inner tube 4, because glass inner tube is made up of glass product, there is higher refractive index and reflectivity, coat coating for selective absorption 3 at the outer surface of glass inner tube 4, improve the absorptivity of solar energy.Glass inner tube 4 absorbs solar energy, and temperature, higher than outer glass tube 1, produces the temperature difference like this, and glass inner tube 4 is outside emittance all the time, increases vacuum layer 2, can effectively reduce energy loss.
Described coating for selective absorption 3, is coated with the outer surface being contained in glass inner tube 4, increases the absorptivity of sunray.
Described glass inner tube 4, the glass lower by the coefficient of expansion is formed, and when working medium is in glass inner tube 4 internal flow, the temperature of generation is higher than the temperature of outer glass tube 1, and like this, outer glass tube 1 and glass inner tube 4 produce temperature difference, is easy to produce explosion.Glass inner tube 4 coefficient of expansion that the utility model adopts is low.Outer glass tube 1 coefficient of expansion is high, like this, when the temperature of glass inner tube 4 temperature higher than outer glass tube 1, effectively can reduce swell increment, prevent glass inner tube 4 or outer glass tube 1 from bursting.
As shown in Figure 1, a kind of Novel direct general formula double-glass vacuum heat-collecting tube is divided into three regions: I district, II district and III district, and the glass material coefficient of expansion of three region uses is different.The material in mainly glass inner tube 4, I district of I district adopts the lower glass material of the coefficient of expansion, and when temperature is higher, swell increment is also less; The material in mainly outer glass tube 1, III district of III district adopts the higher glass material of the coefficient of expansion, and when outer glass tube 1 temperature is lower, swell increment is also higher, like this, for balancing the swell increment that I district produces; II district is the transition region in I district and III district, and the coefficient of expansion of glass material is greater than III district, and is less than the coefficient of expansion of I district glass material.
This patent can also have other embodiment, any trickle amendment that all technical spirit according to this patent adopt, equivalent transformation, substitutes the technical scheme formed, and all drops within the claimed scope of this patent.
Claims (2)
1. a Novel direct general formula double-glass vacuum heat-collecting tube, comprises outer glass tube (1), vacuum layer (2), coating for selective absorption (3), glass inner tube (4);
Outer glass tube (1) and glass inner tube (4) are concentric circles glass tube, be vacuum layer (2) in the middle of outer glass tube (1) and glass inner tube (4), at glass inner tube (4) application coating for selective absorption (3), glass inner tube (4) passes into working medium.
2. a kind of Novel direct general formula double-glass vacuum heat-collecting tube according to claim 1, it is characterized in that the material expansion coefficient of outer glass tube (1), glass inner tube (4) is different, outer glass tube (1) adopts the glass material that the coefficient of expansion is higher, glass inner tube (4) adopts the glass material that the coefficient of expansion is lower, and outer glass tube (1) and glass inner tube (4) junction adopt the coefficient of expansion be greater than glass inner tube (4) and be less than the glass material of the coefficient of expansion of outer glass tube (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520295192.3U CN204854020U (en) | 2015-05-06 | 2015-05-06 | Novel through type double glazing evacuated collector tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520295192.3U CN204854020U (en) | 2015-05-06 | 2015-05-06 | Novel through type double glazing evacuated collector tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204854020U true CN204854020U (en) | 2015-12-09 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520295192.3U Expired - Fee Related CN204854020U (en) | 2015-05-06 | 2015-05-06 | Novel through type double glazing evacuated collector tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204854020U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106196651A (en) * | 2015-05-06 | 2016-12-07 | 南京帕偌特太阳能有限公司 | A kind of Novel direct formula double-glass vacuum heat-collecting tube |
-
2015
- 2015-05-06 CN CN201520295192.3U patent/CN204854020U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106196651A (en) * | 2015-05-06 | 2016-12-07 | 南京帕偌特太阳能有限公司 | A kind of Novel direct formula double-glass vacuum heat-collecting tube |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151209 Termination date: 20160506 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |