CN104075472B - Warm straight through type all glass vacuum thermal-collecting tube in one - Google Patents
Warm straight through type all glass vacuum thermal-collecting tube in one Download PDFInfo
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- CN104075472B CN104075472B CN201410348597.9A CN201410348597A CN104075472B CN 104075472 B CN104075472 B CN 104075472B CN 201410348597 A CN201410348597 A CN 201410348597A CN 104075472 B CN104075472 B CN 104075472B
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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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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/20—Climate change mitigation technologies for sector-wide applications using renewable energy
Abstract
The present invention relates to warm straight through type all glass vacuum thermal-collecting tube in one, be made up of outer glass tube (1), glass inner tube (2), the first corrugated-type expansion joint (3 (A)), the second corrugated-type expansion joint (3 (B)), the first metal connecting tube (9 (A)) and the second metal connecting tube (9 (B)); Outer glass tube (1) one end is by one end sealing-in of First Transition coupling ring (6 (A)) with the first corrugated-type expansion joint (3 (A)), and the other end is by one end sealing-in of the second transition coupling ring (6 (B)) with the second corrugated-type expansion joint (3 (B)); The other end of corrugated-type expansion joint passes through the two ends sealing-in of transition coupling ring and glass inner tube (2); First metal connecting tube (9 (A)) and the second metal connecting tube (9 (B)) are welded in the outside mouth of pipe of the first corrugated-type expansion joint (3 (A)) and the second corrugated-type expansion joint (3 (B)) respectively.Cost of the present invention is lower; Sealing-in difficulty reduces; Be applicable to warm heat utilization system in the solar energy such as industrial heat and thermal refrigerating.
Description
Technical field
The present invention relates to warm straight through type all glass vacuum thermal-collecting tube in, for collecting system warm in solar energy, belong to solar energy utilization technique field.
Background technology
In solar energy, high temperature heat utilization technology comprises industrial heat, air conditioner refrigerating and solar energy thermal-power-generating etc., is study hotspot.Groove type heat collector is the solar energy medium-temperature collectors that current commercialization degree is the highest.Through type metal-glass vaccum heat-collecting tube, as the assembly realizing photothermal deformation, is the core component of current groove type heat collector.The UVAC thermal-collecting tube that business-like through type metal-glass vaccum heat-collecting tube has Siemens Company to produce and the PTR thermal-collecting tube that Schott AG produces, its metal-glass sealing difficulty is larger, sealing-in key technology is abroad monopolized, and to domestic implementation blockade on new techniques, thermal-collecting tube cost is higher.The swell increment difference of metal tube and glass tube is the main cause causing heat-collecting tube sealing to lose efficacy.Domestic through type metal-glass vaccum heat-collecting tube is still in the imitated stage, non-large-scale application, and Key Performance Indicator also lags behind abroad.Exploitation be applicable to the high efficiency of warm heat utilization system in solar energy, low cost novel straight-through heat collection pipe significant.
The patent No. is that the Chinese utility model patent of ZL99221202.2 and ZL200520133468.4 has all invented a kind of through type glass vacuum heat collection tube of solar energy being applicable to solar water heater, type metal expansion joint is adopted to be placed in the straight length of inner glass tube and outer glass pipe, absorb because being subject to thermogenetic thermal expansion, relative to traditional U-shaped all-glass vacuum thermal-collecting tube, this thermal-collecting tube improves Bottomhole pressure mode, enhances Heat-collecting effect.But because its two ends mouth of pipe is glass structure, cannot effectively connect, for collecting system warm in scale.
Application number is disclose a kind of straight through type all glass vacuum heat collection tube of solar energy in the Chinese invention patent of 200810019640.1, and two ends adopt U-shaped telescopic joint to eliminate the swell increment of inside and outside glass tube from radial direction.But this thermal-collecting tube is only for CPC (CompoundParabolicConcentrator) condenser system of optically focused in low power, and heat-collecting temperature is lower; Meanwhile, the heat loss that CPC adds thermal-collecting tube is set at vacuum interlayer.
Shanghai Communications University king is if bamboo etc. is at " Performanceinvestigationonanovelsingle-passevacuatedtube withasymmetricalcompoundparabolicconcentrator " (SolarEnergy, 2013,98:275-289) propose a kind of straight through type all glass vacuum thermal-collecting tube in a literary composition.Outer tube is the glass tube (expansion joint) with multiple waveform configuration, for compensating inner and outer pipes swell increment difference.Because glass toughness is poor, this corrugated glass structure can not the larger swell increment difference of effective compensation, and operating temperature is lower than 100 DEG C.In addition, this thermal-collecting tube two ends mouth of pipe is similarly glass sealing structure, is not easy to serial connection.
Summary of the invention
The object of the invention is to the limitation overcoming existing through type metal-glass vaccum heat-collecting tube and straight through type all glass vacuum thermal-collecting tube, in solar energy, temperature (100 ~ 300 DEG C) collecting system provides the middle temperature straight through type all glass vacuum thermal-collecting tube of a kind of high efficiency, low cost.
Technical scheme of the present invention is: warm straight through type all glass vacuum thermal-collecting tube in one, is made up of outer glass tube 1, glass inner tube 2, first corrugated-type expansion joint 3 (A), the second corrugated-type expansion joint 3 (B), the first metal connecting tube 9 (A) and the second metal connecting tube 9 (B); Be vacuum space 4 between outer glass tube 1 and glass inner tube 2, glass inner tube 2 outer surface is coated with the coating for selective absorption 8 of high-absorbility low-launch-rate; Getter 5 is posted near end position in glass inner tube 2 outer surface side; Outer glass tube 1 one end is by one end sealing-in of First Transition coupling ring 6 (A) with the first corrugated-type expansion joint 3 (A), and the other end is by one end sealing-in of the second transition coupling ring 6 (B) with the second corrugated-type expansion joint 3 (B); The other end of the first corrugated-type expansion joint 3 (A) and the second corrugated-type expansion joint 3 (B) is respectively by the two ends sealing-in with glass inner tube 2 of the 3rd transition coupling ring 7 (A) and the 4th transition coupling ring 7 (B); First metal connecting tube 9 (A) and the second metal connecting tube 9 (B) are welded in the outside mouth of pipe of the first corrugated-type expansion joint 3 (A) and the second corrugated-type expansion joint 3 (B) respectively.
Preferably above-mentioned outer glass tube 1 and the material of glass inner tube 2 are Pyrex; In preferred glass, pipe 2 diameter range is 30 ~ 70mm, and length is 1 ~ 4m; Outer glass tube 1 diameter 10 ~ 30mm larger than glass inner tube 2.
The material of preferably above-mentioned corrugated-type expansion joint is stainless steel; It is external or built-in that the sealing-in of corrugated-type expansion joint and outer glass tube and glass inner tube connects form; External, is arranged on outside outer glass tube 1; Built-in, be arranged on inside outer glass tube 1.
The wave-number range of preferred wave shape form expansion joint is 1 ~ 10, and waveform is U-shaped or Ω type.Described transition coupling ring is stainless steel or expansion alloy, and the coefficient of expansion of material is 3 × 10
-6~ 12 × 10
-6m/ (m DEG C); More preferably, when described expansion alloy is Fe-Co-Ni kovar alloy, in 25 ~ 400 DEG C of temperature ranges, the coefficient of expansion is 4 × 10
-6~ 6 × 10
-6m/ (m DEG C).
The sealing-in mode of described outer glass tube and glass inner tube and corrugated-type expansion joint and transition coupling ring adopts high-frequency electromagnetic induction sealing by fusing, hot pressing envelope or solder welding procedure.
The vacuum of preferably above-mentioned vacuum space 4 is 5 × 10
-5~ 0.05Pa.
The absorptivity of the coating for selective absorption 8 of preferably above-mentioned high-absorbility low-launch-rate is 86% ~ 96%, and emissivity is 4% ~ 14%.
Described getter 5 is evaporable air-absorbing agent, and its material is barium aluminium nickel or barium titanium, and shape is disk like, band shape, ring-type or cup-shaped.
Described metal connecting tube 9 is stainless steel and other metal materials, when straight through type all glass vacuum thermal-collecting tube warm in many connects, directly can weld or be connected by welded flange in metal connecting tube 9.
Described middle temperature straight through type all glass vacuum thermal-collecting tube, is applicable to the light and heat collection system of slot type, composite parabolic formula and Fresnel.
According to data well known in the art, every form is similar to the present invention with material, the middle temperature straight through type all glass vacuum pipe heat collector that do not have material alterations, all drops in protection scope of the present invention.
Beneficial effect:
(1) outer glass tube of the present invention and glass inner tube material are all glass, and the collecting efficiency of thermal-collecting tube is 65% ~ 85%; Compared with through type metal-glass vaccum heat-collecting tube, during 100 ~ 300 DEG C of operating temperatures, thermal stress reduces by 50% ~ 80%, thus reduces sealing-in difficulty and crash rate, improves the reliability that thermal-collecting tube works under mesophilic condition.
(2) outer tube of the present invention and interior pipe adopt glass material, and not only material cost is lower; Meanwhile, sealing-in difficulty reduces, and process costs reduces.
(3) two ends of the present invention are reserved with metallic welded tubes, conveniently realize multiple thermal-collecting tube and connect, obtain higher heat-collecting temperature, be applicable to warm heat utilization system in the solar energy such as industrial heat and thermal refrigerating.
Accompanying drawing explanation
Fig. 1 be when adopting U-shaped expansion joint external in the structural representation of warm straight through type all glass vacuum thermal-collecting tube;
Wherein, 1-outer glass tube; 2-glass inner tube; 3 (A)-the first corrugated-type expansion joint; 3 (B)-the second corrugated-type expansion joint; 4-vacuum space; 5-getter; 6 (A)-First Transition coupling rings; 6 (B)-the second transition coupling ring; 7 (A)-three transition coupling ring; 7 (B)-four transition coupling ring; 8-coating for selective absorption; 9 (A)-the first metal connecting tube; 9 (B)-the second metal connecting tube.
Fig. 2 is the partial view that when adopting U-shaped expansion joint external, outer glass tube is connected with glass inner tube;
Fig. 3 is the structural representation of through type double-glass vacuum heat-collecting tube when adopting U-shaped interior expansion joint built-in;
Fig. 4 is the partial view that when adopting U-shaped interior expansion joint built-in, outer glass tube is connected with glass inner tube.
Detailed description of the invention
Embodiment 1
As shown in Figure 1, the invention discloses warm straight through type all glass vacuum thermal-collecting tube in one, be made up of outer glass tube 1, glass inner tube 2, corrugated-type expansion joint 3 and metal connecting tube 9; Be vacuum space 4 between outer glass tube 1 and glass inner tube 2, glass inner tube 2 outer surface is coated with the coating for selective absorption 8 of high-absorbility low-launch-rate; Getter 5 is posted near end position in glass inner tube 2 outer surface side; Outer glass tube 1 one end is by one end sealing-in of First Transition coupling ring 6 (A) with the first corrugated-type expansion joint 3 (A), and the other end is by one end sealing-in of the second transition coupling ring 6 (B) with the second corrugated-type expansion joint 3 (B); The other end of the first corrugated-type expansion joint 3 (A) and the second corrugated-type expansion joint 3 (B) is respectively by the two ends sealing-in with glass inner tube 2 of the 3rd transition coupling ring 7 (A) and the 4th transition coupling ring 7 (B); First metal connecting tube 9 (A) and the second metal connecting tube 9 (B) are welded in the outside mouth of pipe of the first corrugated-type expansion joint 3 (A) and the second corrugated-type expansion joint 3 (B) respectively; Expansion joint 3 adopts external, is namely placed in outside outer glass tube 1; Glass inner tube 2 diameter is 70mm, and length is 1m; Outer glass tube 1 diameter 30mm larger than glass inner tube 2.The material of outer glass tube 1 and glass inner tube 2 is Pyrex 3.3.Corrugated-type expansion joint 3 is stainless steel, and waveform is U-shaped, and wave number is 10.The material of transition coupling ring I 6 and transition coupling ring II 7 is the coefficient of expansion is 3 × 10
-6the Fe-Ni expansion alloy of m/ (m DEG C), adopts hot-press sealing and sealing by fusing technique to carry out sealing-in with outer glass tube 1, glass inner tube 2 and corrugated-type expansion joint 3 respectively.The vacuum of vacuum space 4 is 0.05Pa, and the absorptivity of coating for selective absorption is 86%, and emissivity is 4%.Fig. 2 is the partial view that outer glass tube is connected with glass inner tube.
The present embodiment thermal-collecting tube is used for Fresnel condenser system, and thermal-collecting tube collecting efficiency is 65% ~ 75%, and heat-collecting temperature scope is 0 ~ 200 DEG C; During 200 DEG C of operating temperatures, the thermal stress of thermal-collecting tube reduces about 50% than through type metal-glass vaccum heat-collecting tube.
Embodiment 2
As shown in Figure 3, be another embodiment of the present invention, described corrugated-type expansion joint 3 is built-in, is namely placed in inside outer glass tube 1; Glass inner tube 2 diameter is 30mm, and length is 2m; Outer glass tube 1 diameter 10mm larger than glass inner tube 2; The material of outer glass tube 1 and glass inner tube 2 is Pyrex 5.0; Corrugated-type expansion joint 3 is stainless steel, and waveform is U-shaped, and wave number is 1; The material of transition coupling ring I 6 and transition coupling ring II 7 is the coefficient of expansion is 4 × 10
-6the Fe-Ni-Co kovar alloy of m/ (m DEG C), adopts sealing by fusing to connect and solder welding procedure carries out sealing-in with outer glass tube 1, glass inner tube 2 and corrugated-type expansion joint 3 respectively; The vacuum of vacuum space 4 is 0.01Pa; The absorptivity of coating for selective absorption is 96%, and emissivity is 14%.All the other versions are identical with embodiment 1.Fig. 4 is the partial view that interior expansion joint form outer glass tube is connected with glass inner tube.
The present embodiment thermal-collecting tube is used for trench light condensing system, and collecting efficiency is 75% ~ 85%, and heat-collecting temperature scope is 0 ~ 300 DEG C; During 300 DEG C of operating temperatures, the thermal stress of thermal-collecting tube reduces about 80% than through type metal-glass vaccum heat-collecting tube.
Embodiment 3
In another embodiment of the present invention, described corrugated-type expansion joint 3 is Ω type, and outer glass tube length is 4m; The material of transition coupling ring I 6 and transition coupling ring II 7 is the coefficient of expansion is 12 × 10
-6the stainless steel of m/ (m DEG C); Sealing by fusing connection and solder welding procedure is adopted to carry out sealing-in with outer glass tube 1, glass inner tube 2 and corrugated-type expansion joint 3 respectively; The vacuum of vacuum space is 5 × 10
-5pa.All the other versions are identical with embodiment 1 with parameter.
The present embodiment thermal-collecting tube is used for composite parabolic condenser system, and thermal-collecting tube collecting efficiency reaches 65% ~ 75%, and heat-collecting temperature scope is 0 ~ 150 DEG C; During 150 DEG C of operating temperatures, the thermal stress of thermal-collecting tube reduces about 50% than through type metal-glass vaccum heat-collecting tube.
Embodiment 4
In another embodiment of the present invention, described outer glass tube 1 length is 4m; Corrugated-type expansion joint wave number is 3; Described transition coupling ring I 6 and the material of transition coupling ring II 7 are the coefficient of expansion is 6 × 10
-6the Fe-Ni-Co kovar alloy of m/ (m DEG C), all the other versions are identical with embodiment 2 with parameter.
The present embodiment thermal-collecting tube is used for trench light condensing system, and collecting efficiency is 75% ~ 85%, and heat-collecting temperature scope is 0 ~ 300 DEG C; During 300 DEG C of operating temperatures, the thermal stress of thermal-collecting tube reduces about 80% than through type metal-glass vaccum heat-collecting tube.
Claims (7)
1. a warm straight through type all glass vacuum thermal-collecting tube in, is characterized in that being made up of outer glass tube (1), glass inner tube (2), the first corrugated-type expansion joint (3 (A)), the second corrugated-type expansion joint (3 (B)), the first metal connecting tube (9 (A)) and the second metal connecting tube (9 (B)); Be vacuum space (4) between outer glass tube (1) and glass inner tube (2), glass inner tube (2) outer surface is coated with the coating for selective absorption (8) of high-absorbility low-launch-rate; Getter (5) is posted near end position in glass inner tube (2) outer surface side; Outer glass tube (1) one end is by one end sealing-in of First Transition coupling ring (6 (A)) with the first corrugated-type expansion joint (3 (A)), and the other end is by one end sealing-in of the second transition coupling ring (6 (B)) with the second corrugated-type expansion joint (3 (B)); The other end of the first corrugated-type expansion joint (3 (A)) and the second corrugated-type expansion joint (3 (B)) is respectively by the two ends sealing-in with glass inner tube (2) of the 3rd transition coupling ring (7 (A)) and the 4th transition coupling ring (7 (B)); First metal connecting tube (9 (A)) and the second metal connecting tube (9 (B)) are welded in the outside mouth of pipe of the first corrugated-type expansion joint (3 (A)) and the second corrugated-type expansion joint (3 (B)) respectively.
2. middle temperature straight through type all glass vacuum thermal-collecting tube according to claim 1, is characterized in that the material of described outer glass tube (1) and glass inner tube (2) is Pyrex; Described glass inner tube (2) diameter range is 30 ~ 70mm, and length is 1 ~ 4m; Described outer glass tube (1) diameter 10 ~ 30mm larger than glass inner tube (2).
3. middle temperature straight through type all glass vacuum thermal-collecting tube according to claim 1, is characterized in that two described corrugated-type expansion joint materials are stainless steel; Waveform is U-shaped or Ω type, and wave-number range is 1 ~ 10.
4. middle temperature straight through type all glass vacuum thermal-collecting tube according to claim 1, is characterized in that four described transition coupling rings are stainless steel or expansion alloy; The coefficient of expansion of material is 3 × 10
-6~ 12 × 10
-6m/ (m DEG C).
5. middle temperature straight through type all glass vacuum thermal-collecting tube according to claim 1, is characterized in that the vacuum of described vacuum space (4) is 5 × 10
-5~ 0.05Pa.
6. middle temperature straight through type all glass vacuum thermal-collecting tube according to claim 1, it is characterized in that the absorptivity of described coating for selective absorption (8) is 86% ~ 96%, emissivity is 4% ~ 14%.
7. middle temperature straight through type all glass vacuum thermal-collecting tube according to claim 1, is characterized in that the sealing-in of two corrugated-type expansion joints and outer glass tube (1) and glass inner tube (2) connects form and is external or built-in.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410348597.9A CN104075472B (en) | 2014-07-21 | 2014-07-21 | Warm straight through type all glass vacuum thermal-collecting tube in one |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410348597.9A CN104075472B (en) | 2014-07-21 | 2014-07-21 | Warm straight through type all glass vacuum thermal-collecting tube in one |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104075472A CN104075472A (en) | 2014-10-01 |
| CN104075472B true CN104075472B (en) | 2016-04-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410348597.9A Active CN104075472B (en) | 2014-07-21 | 2014-07-21 | Warm straight through type all glass vacuum thermal-collecting tube in one |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105258362A (en) * | 2015-10-13 | 2016-01-20 | 北京有色金属研究总院 | Suction material holding support for solar energy medium-high temperature evacuated collector tube |
| CN106440406B (en) * | 2016-10-28 | 2018-07-17 | 东南大学 | A kind of solar vacuum heat-collecting pipe of double expansion joints |
| CN110044078A (en) * | 2019-05-29 | 2019-07-23 | 广州聚能太阳能科技有限公司 | A kind of new type solar collecting device |
| CN110470062A (en) * | 2019-09-12 | 2019-11-19 | 浙江科杰新材料有限公司 | A kind of solar vacuum heat-collecting pipe |
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|---|---|---|---|---|
| CN2381964Y (en) * | 1999-06-10 | 2000-06-07 | 黄永年 | Straight throughing vacuum glass solar heat collector |
| CN2861880Y (en) * | 2005-11-22 | 2007-01-24 | 江希年 | Glass vacuum solar heating collecting pipe |
| CN101256033A (en) * | 2008-03-11 | 2008-09-03 | 东南大学 | Straightthrough type double glazing vacuum solar heat collection tube |
| CN102519160A (en) * | 2011-12-27 | 2012-06-27 | 皇明太阳能股份有限公司 | Straight-through solar collector tube |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005022183B3 (en) * | 2005-05-09 | 2006-08-03 | Schott Ag | Absorber tube for use in parabolic trough collectors of solar thermal power station, has connection unit extending from inner end of expansion compensating device through inner annular gap and including hydrogen window |
-
2014
- 2014-07-21 CN CN201410348597.9A patent/CN104075472B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2381964Y (en) * | 1999-06-10 | 2000-06-07 | 黄永年 | Straight throughing vacuum glass solar heat collector |
| CN2861880Y (en) * | 2005-11-22 | 2007-01-24 | 江希年 | Glass vacuum solar heating collecting pipe |
| CN101256033A (en) * | 2008-03-11 | 2008-09-03 | 东南大学 | Straightthrough type double glazing vacuum solar heat collection tube |
| CN102519160A (en) * | 2011-12-27 | 2012-06-27 | 皇明太阳能股份有限公司 | Straight-through solar collector tube |
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| CN104075472A (en) | 2014-10-01 |
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