CN101256037A - Solar heat-collecting tube - Google Patents
Solar heat-collecting tube Download PDFInfo
- Publication number
- CN101256037A CN101256037A CNA2008100196454A CN200810019645A CN101256037A CN 101256037 A CN101256037 A CN 101256037A CN A2008100196454 A CNA2008100196454 A CN A2008100196454A CN 200810019645 A CN200810019645 A CN 200810019645A CN 101256037 A CN101256037 A CN 101256037A
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- CN
- China
- Prior art keywords
- tube
- solar energy
- absorption
- outside
- absorption tube
- Prior art date
- 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.)
- Pending
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S10/00—Solar heat collectors using working fluids
- F24S10/40—Solar heat collectors using working fluids in absorbing elements surrounded by transparent enclosures, e.g. evacuated solar collectors
- F24S10/45—Solar heat collectors using working fluids in absorbing elements surrounded by transparent enclosures, e.g. evacuated solar collectors the enclosure being cylindrical
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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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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Roof Covering Using Slabs Or Stiff Sheets (AREA)
Abstract
The invention pertains to solar energy utilization technique field, and discloses a solar energy heat collecting tube comprising a glass bushing with an absorption tube disposed therein. Space between the glass bushing and the absorption tube are sealed by a transition connecting member to form a vacuum layer in which a degasser may be disposed. The absorption tube is a ceramic tube with a solar energy absorbing layer disposed outside. A metal layer may be plated outside the ceramic tube firstly, and a solar energy absorption layer which may be plated copper, carbon steel, stainless steel or aluminum is disposed outside the metal layer. Since metal is plated outside the ceramic tube, the ceramic tube and the solar energy absorption layer are combined better and the property of the tube is enhanced. A supporting member is disposed between the glass tube and the absorption tube to ensure the stability of the whole structure.
Description
Technical field
The present invention relates to a kind of solar vacuum heat-collecting pipe, especially a kind of solar vacuum heat-collecting pipe that adopts ceramic material to make absorption tube.
Background technology
Solar vacuum heat-collecting pipe is a solar heating engineering, core component in the systems such as trough type solar power generation, straight-through vacuum thermal-collecting tube in the market is a metal-glass formula vacuum heat collection pipe, stainless steel tube is contained in the concentric cylindrical glass sock, keep vacuum to reduce heat loss in the glass tube, stainless steel pipe surface adopts magnetron sputtering coated with high temperature coating for selective absorption, the thermal expansion coefficient difference of thermal-arrest metal tube and glass bushing is obvious, therefore adopt bellows to connect, adopt the kovar alloy sealing-in between bellows and glass bushing, this high-temperature heat-collection pipe for tank-type thermal power generation sealing technology is at present only by moral, the minority producer of country such as Israel grasps.
Retrieval finds, application number is that 031588328 Chinese invention patent application discloses a kind of heat absorption tube for solar energy, and this patent application has proposed a kind of more durable endothermic tube by architecture advances.Yet, wherein still be unable to do without the kovar alloy sealing-in---be glass-metal-transition piece.
In the former research of applicant, also designed the technical scheme that adopts the kovar alloy sealing-in, but through putting into practice and further discovering, the technical scheme that contains the kovar alloy sealing structure has the following disadvantages: the one, owing to adopt the complex process of kovar alloy with glass bushing and bellows sealing-in processing, cost is high; The 2nd, glass tube and kovar alloy sealing-in place are broken or vacuum failure easily because there is reason such as stress.
Summary of the invention
For the glass bushing that solves the prior art existence is connected the shortcoming difficult, that cost is high with bellows, the present invention proposes a kind of solar energy heat collection pipe, make heat pipe by pottery, can not add expansion joint in addition, improved the sealing of pipe, overall performance improves greatly.
Technical scheme of the present invention is a kind of solar energy heat collection pipe, comprise in glass bushing, the glass bushing and be provided with absorption tube, between glass bushing and the absorption tube by the airtight vacuum layer that is connected to form of transition attaching parts, can place getter in the vacuum layer, better to guarantee vacuum, described absorption tube is that the earthenware outside is provided with solar absorbing layer.Also can plate the layer of metal layer earlier in described earthenware outside, be provided with solar absorbing layer in described metal level outside, described metal level can be copper facing, carbon steel, stainless steel or aluminium.Owing to plated metal outside earthenware, the combination of earthenware and solar energy absorbing coating is just better, has improved the performance of pipe like this.Outside the seam of the transition attaching parts of described glass tube and absorption tube, can be provided with protective cover, cause wearing out, prolong the service life of pipe to prevent sunshine direct projection seam.Between described glass tube and absorption tube, support member can also be provided with, the stable of total can be better guaranteed.
Beneficial effect of the present invention is: 1. safety and reliability, superior performance.Because absorption tube is directly made by ceramic material, the linear expansion coefficient of ceramic material is very little, and the swell increment difference that produces because of temperature can be ignored, therefore do not need to use in addition again bellows, absorption tube can not break yet, and has reduced to connect seam, has improved airtight performance;
2. earthenware has plated behind the metal level outward in addition and the combination of absorption sunshine coating is tightr, has improved the performance of pipe, can produce 100 ℃-150 ℃ thermal source, is used for solar seawater desalination system; Adopt specific ceramic material absorption tube and process for sealing, the present invention can also be used for the higher Solar Energy Heat Utilization System of temperature requirement.
Support member the intensity that can effectively improve whole pipe is set, being provided with of protective cover can prevent the aging of seam crossing, prolongs the service life of pipe.
Description of drawings
The present invention will be further described below in conjunction with accompanying drawing and exemplary embodiments.
Fig. 1 is the structural representation of the embodiment of the invention 1.
Wherein 1 is transition piece, the 2nd, glass tube, the 3rd, absorption tube, the 4th, vacuum layer, the 5th, support, the 6th, getter, the 7th, protective cover, the 8th, solar absorbing layer, the 9th, metal level
Fig. 2 is the structural representation of the embodiment of the invention 2.
Fig. 3 is that the A of Fig. 1, Fig. 2 is to view.
Fig. 4 is that the B-B of Fig. 1, Fig. 2 is to view.
The specific embodiment
Embodiment 1
The structure of present embodiment as shown in Figure 1, the solar vacuum heat-collecting pipe of this employing ceramic material absorption tube comprises glass tube 2, the coaxial absorption tube 3 that is installed in the glass tube 2, and the two the transition attaching parts 1 of being tightly connected, be vacuum layer 4 between described glass tube 2 and the absorption tube 3, can place getter in the vacuum layer 4 better to guarantee vacuum wherein, described absorption tube 3 is made by ceramic material, outside ceramic layer, be coated with metal level 9, metal level can be a copper, carbon steel, stainless steel or aluminium, outside metal level, apply solar absorbing layer 8 again, combination through such processing ceramic layer and solar absorbing layer is tightr, has improved the performance of pipe.And because the linear expansion coefficient of pottery is very little, and the swell increment difference that produces because of temperature can be ignored, so just not needing that expansion joint is set has in addition regulated swell increment, has both simplified production technology, has also better improved the performance of whole pipe.In order to keep the stable of structure, can increase support member 5 between glass tube 2 and the absorption tube 3; This support member 5 can be to be made of circular arc supporting seat, elasticity support sheet, the head of conflicting, the arc radius of circular arc supporting seat and absorption tube 3 external diameters match, be fixed on outside the absorption tube, elasticity support sheet is by stretching to both sides on the circular arc supporting seat, and the conflict head by the end is resisted against location in the glass tube 2.During assembling, two one group of support member is separately fixed at absorption tube 3 bilateral symmetry places.In order to protect the interface between transition attaching parts 1 and glass tube 2 and the absorption tube 3, can add protective cover 7 in seam.
The structure of present embodiment as shown in Figure 2, structure is similar to embodiment 1, be exactly ceramic absorption tube 3 with glass tube 2 between directly be connected by transition attaching parts 1, the outside does not add protective cover, direct coating solar absorbing layer 8 on the ceramic absorption tube 3.
Claims (5)
1. solar energy heat collection pipe, comprise in glass bushing, the glass bushing and be provided with absorption tube, by the airtight vacuum layer that is connected to form of transition attaching parts, it is characterized in that described absorption tube is an earthenware between glass bushing and the absorption tube, be provided with solar absorbing layer in described earthenware outside.
2. solar energy heat collection pipe as claimed in claim 1 is characterized in that being provided with protective cover outside the seam of the transition attaching parts of described glass tube and absorption tube.
3. solar energy heat collection pipe as claimed in claim 1 is characterized in that being provided with support member between described glass tube and absorption tube.
4. solar energy heat collection pipe as claimed in claim 1 is characterized in that also being provided with metal level in described earthenware outside, is provided with solar absorbing layer in described metal level outside.
5. solar energy heat collection pipe as claimed in claim 1 is characterized in that described metal level is aluminium, carbon steel, stainless steel or copper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100196454A CN101256037A (en) | 2008-03-11 | 2008-03-11 | Solar heat-collecting tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100196454A CN101256037A (en) | 2008-03-11 | 2008-03-11 | Solar heat-collecting tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101256037A true CN101256037A (en) | 2008-09-03 |
Family
ID=39891044
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100196454A Pending CN101256037A (en) | 2008-03-11 | 2008-03-11 | Solar heat-collecting tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101256037A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102200355A (en) * | 2010-03-23 | 2011-09-28 | 励行根 | Heat collecting tube for solar thermal power generation |
| CN102844627A (en) * | 2009-10-09 | 2012-12-26 | 苏菲亚安蒂波利斯能源发展公司 | Solar collector and system for producing hot water comprising such solar collectors |
-
2008
- 2008-03-11 CN CNA2008100196454A patent/CN101256037A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102844627A (en) * | 2009-10-09 | 2012-12-26 | 苏菲亚安蒂波利斯能源发展公司 | Solar collector and system for producing hot water comprising such solar collectors |
| CN102200355A (en) * | 2010-03-23 | 2011-09-28 | 励行根 | Heat collecting tube for solar thermal power generation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20080903 |