CN101307957A - Straight through type vacuum solar energy thermal-collecting tube - Google Patents
Straight through type vacuum solar energy thermal-collecting tube Download PDFInfo
- Publication number
- CN101307957A CN101307957A CNA200810116133XA CN200810116133A CN101307957A CN 101307957 A CN101307957 A CN 101307957A CN A200810116133X A CNA200810116133X A CN A200810116133XA CN 200810116133 A CN200810116133 A CN 200810116133A CN 101307957 A CN101307957 A CN 101307957A
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- China
- Prior art keywords
- pipe
- tube
- metal heat
- heat absorption
- bellows
- 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.)
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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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S40/00—Safety or protection arrangements of solar heat collectors; Preventing malfunction of solar heat collectors
- F24S40/80—Accommodating differential expansion of solar collector elements
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/138—Water desalination using renewable energy
- Y02A20/142—Solar thermal; Photovoltaics
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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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- 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
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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)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
The invention relates to a straight through vacuum solar collecting pipe, comprising a glass pipe, wherein, two ends of the glass pipe respectively thermally seal a metal heat absorbing pipe; the outer surface of the metal heat absorbing pipe is coated with solar selective absorbing coating; and a vacuum vent is arranged on the wall of the glass pipe. The invention is characterized in that: a sylphon bellows is respectively arranged on two ends of a gap between the glass pipe and the metal heat absorbing pipe; an outer end of each sylphon bellows is welded with a metal end cover of the end into a whole through a transitional ring; an inner end of each sylphon bellows is connected with a transitional pipe which passes through the inside of the sylphon bellows and the metal end cover of the end to be welded to the outer end of the metal heat absorbing pipe; and a vent-pipe vacuumizes between the glass pipe and the metal heat absorbing pipe into high vacuum. The straight through vacuum solar collecting pipe effectively improves the heat-collecting efficiency and the service life of the integral collecting pipe, can be widely applied in the fields such as solar cooling, industrial heating, seawater desalination and solar thermal power generation.
Description
Technical field
The present invention relates to a kind of solar collection element, particularly about a kind of straight through type vacuum solar energy thermal-collecting tube.
Background technology
General solar vacuum heat-collecting pipe mainly comprises glass tube absorber vacuum tube and metallic plate absorber vacuum tube, and the serviceability temperature of these two kinds of vacuum tubes when solar energy heating is mostly below 100 ℃.Another kind has the straight through type vacuum solar energy thermal-collecting tube of metal tube absorber; one end outer surface of its metal tube is welded with a bellows; this bellows is positioned at the outside of glass tube port; this bellows can absorb the thermal expansion of metal tube, thereby plays the sealing-in of end cap between cover glass pipe and the metal tube.But this solar energy heat collection pipe that only has a bellows structure, its application of temperature are only below 250 ℃.And solar energy thermal-power-generating to the heat-collecting temperature of thermal-collecting tube require up to 300 ℃～400 ℃.Therefore, general solar vacuum heat-collecting pipe does not possess the requirement of bearing higher temperature at present, and therefore its range of application is restricted.
Summary of the invention
At the problems referred to above, it is good to the purpose of this invention is to provide a kind of bellows compensation effect, resistant to elevated temperatures straight through type vacuum solar energy thermal-collecting tube.
For achieving the above object, the present invention takes following technical scheme: a kind of straight through type vacuum solar energy thermal-collecting tube, it comprises a glass tube, the two ends of described glass tube are respectively by a metal end hot pressing front cover metal heat absorption tube, described metal heat absorption tube outer surface scribbles the solar selective heat-absorbing coating, described glass tube walls is provided with a vaccum exhaust outlet, it is characterized in that: the two ends in space are respectively arranged with a bellows between described glass tube and the described metal heat absorption tube, the outer end of each described bellows is integrally welded by the described metal end of a transition rings and this end, the inner of each described bellows connects a transition conduit, described transition conduit is passed in described bellows, and the metal end that passes this end is welded on the outer end of described metal heat absorption tube, is pumped into by blast pipe between described glass tube and the described metal heat absorption tube to be high vacuum.
The temperature of the thermal-arrest working medium in the described metal heat absorption tube is more than 300 ℃, and it is 3MPa that described metal heat absorption tube can bear pressure.
The present invention is owing to take above technical scheme; it has the following advantages: 1, the present invention is owing to the two ends in space between glass tube and metal heat absorption tube are provided with a bellows respectively; and the bellows two ends are connected metal end and metal heat absorption tube respectively by transition rings; therefore in endothermic process; can absorb the thermal expansion of metal heat absorption tube by bellows; buffering metal heat absorption tube thermal expansion stresses, the cover glass metal sealing.Make the present invention can bear high temperature about 400 ℃, satisfy the needs of solar energy thermal-power-generating.2, the present invention is owing to be arranged on bellows between glass tube and the metal heat absorption tube, therefore can prevent not only that bellows is exposed to the etching problem that cause the glass tube outside, and can prevent that bellows is arranged on the outer problem that the heat of metal heat absorption tube is is outwards scattered and disappeared of pipe.The present invention has improved the collecting efficiency and the service life of whole thermal-collecting tube effectively, makes the present invention can bear thermal-arrest requirement about 400 ℃, and then is widely used in the fields such as solar refrigeration, industrial heating, desalinization and solar energy thermal-power-generating.
Description of drawings
Fig. 1 is a vertical section structure schematic diagram of the present invention
Fig. 2 is a bellows syndeton schematic diagram of the present invention
The specific embodiment
Below in conjunction with drawings and Examples, the present invention is described in detail.
As shown in Figure 1 and Figure 2, the present invention includes a glass tube 1, a sheathed metal heat absorption tube 2 in the glass tube 1, glass tube 1 two ends are integral with the glass heat press seal by a metal end 3 respectively, and metal heat absorption tube 2 outer surfaces are coated with the solar selective heat-absorbing coating.The two ends in space are provided with a bellows 4 respectively between glass tube 1 and metal heat absorption tube 2, the outer end of each bellows 4 is integrally welded with the metal end 3 of this end by a transition rings 5, the inner of each bellows 4 connects a transition conduit 6, transition conduit 6 is passed in bellows 4, and the metal end 3 that passes this end is welded on the outer end of metal heat absorption tube 2.Glass tube 1 tube wall is provided with an exhaust outlet 7, and the space between glass tube 1 and the metal heat absorption tube 2 is evacuated by exhaust outlet 7.
The present invention can be applicable in the solar thermal collection system, particularly is applied in the solar thermal collection system of outer optically focused.During use, under the condenser system effect, the temperature of the thermal-arrest working medium in the metal heat absorption tube 2 is reached more than 300 ℃ outside optically focused compares greater than 50 solar energy, metal heat absorption tube 2 can bear the pressure of 3Mpa, can satisfy the needs of present solar energy thermal-power-generating.
In the present invention, can absorb the thermal expansion of metal heat absorption tube 2 after bellows 4 is heated, reach the effect of the pressure of buffering metal heat absorption tube 2 thermal expansions, the sealing-in between cover glass pipe 1 and the metal end 3 is not destroyed.Bellows 4 is installed in glass tube inside, can reduce corrosion and heat dissipation problem that bellows 4 occurs when glass tube is outside.
Among the present invention, the external diameter of glass tube 1 is 100mm～120mm, and the external diameter of metal heat absorption tube 2 is 38～70mm.Whole thermal-collecting tube total length 1.8m～4.2m.
Because the heat-conducting work medium in the metal heat absorption tube 2 of the present invention can reach about 400 ℃, therefore can widen application of the present invention greatly, particularly can be widely used in fields such as solar refrigeration, industrial heating, desalinization and solar energy thermal-power-generating.
Claims (2)
1, a kind of straight through type vacuum solar energy thermal-collecting tube, it comprises a glass tube, the two ends of described glass tube are respectively by a metal end hot pressing front cover metal heat absorption tube, described metal heat absorption tube outer surface scribbles the solar selective heat-absorbing coating, described glass tube walls is provided with a vaccum exhaust outlet, it is characterized in that: the two ends in space are respectively arranged with a bellows between described glass tube and the described metal heat absorption tube, the outer end of each described bellows is integrally welded by the described metal end of a transition rings and this end, the inner of each described bellows connects a transition conduit, described transition conduit is passed in described bellows, and the metal end that passes this end is welded on the outer end of described metal heat absorption tube, is pumped into by blast pipe between described glass tube and the described metal heat absorption tube to be high vacuum.
2, a kind of straight through type vacuum solar energy thermal-collecting tube as claimed in claim 1 is characterized in that: the temperature of the thermal-arrest working medium in the described metal heat absorption tube is more than 300 ℃, and it is 3MPa that described metal heat absorption tube can bear pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200810116133XA CN101307957A (en) | 2008-07-03 | 2008-07-03 | Straight through type vacuum solar energy thermal-collecting tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200810116133XA CN101307957A (en) | 2008-07-03 | 2008-07-03 | Straight through type vacuum solar energy thermal-collecting tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101307957A true CN101307957A (en) | 2008-11-19 |
Family
ID=40124531
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA200810116133XA Pending CN101307957A (en) | 2008-07-03 | 2008-07-03 | Straight through type vacuum solar energy thermal-collecting tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101307957A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102410651A (en) * | 2011-11-01 | 2012-04-11 | 河海大学 | Groove type solar heat collection tube using metal foams to strengthen heat conduction |
| CN103109141A (en) * | 2010-07-19 | 2013-05-15 | 阿文戈亚太阳能新技术公司 | Novel arrangement of non-evaporable getters for a tube solar collector |
| CN102109231B (en) * | 2009-12-23 | 2013-08-14 | 中金盛唐新能源科技（北京）有限公司 | Line focusing solar vacuum heat-collecting tube |
| JP2014031909A (en) * | 2012-08-01 | 2014-02-20 | Toyota Industries Corp | Solar heat collector tube |
| CN105110398A (en) * | 2015-09-24 | 2015-12-02 | 北京天普太阳能工业有限公司 | Solar-powered seawater desalination system |
| CN105588351A (en) * | 2015-12-30 | 2016-05-18 | 南京诚远太阳能科技有限公司 | Solar thermal collecting pipe and processing method thereof |
-
2008
- 2008-07-03 CN CNA200810116133XA patent/CN101307957A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102109231B (en) * | 2009-12-23 | 2013-08-14 | 中金盛唐新能源科技（北京）有限公司 | Line focusing solar vacuum heat-collecting tube |
| CN103109141A (en) * | 2010-07-19 | 2013-05-15 | 阿文戈亚太阳能新技术公司 | Novel arrangement of non-evaporable getters for a tube solar collector |
| CN103109141B (en) * | 2010-07-19 | 2015-11-25 | 阿文戈亚太阳能新技术公司 | For the new arrangement structure of the nonevaporable getter of tube type solar collector |
| CN102410651A (en) * | 2011-11-01 | 2012-04-11 | 河海大学 | Groove type solar heat collection tube using metal foams to strengthen heat conduction |
| JP2014031909A (en) * | 2012-08-01 | 2014-02-20 | Toyota Industries Corp | Solar heat collector tube |
| US9903612B2 (en) | 2012-08-01 | 2018-02-27 | Kabushiki Kaisha Toyota Jidoshokki | Solar heat collection tube |
| CN105110398A (en) * | 2015-09-24 | 2015-12-02 | 北京天普太阳能工业有限公司 | Solar-powered seawater desalination system |
| CN105588351A (en) * | 2015-12-30 | 2016-05-18 | 南京诚远太阳能科技有限公司 | Solar thermal collecting pipe and processing method thereof |
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| 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: 20081119 |