CN205641583U - Slot type solar vacuum heat collection tube - Google Patents
Slot type solar vacuum heat collection tube Download PDFInfo
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- CN205641583U CN205641583U CN201620288427.0U CN201620288427U CN205641583U CN 205641583 U CN205641583 U CN 205641583U CN 201620288427 U CN201620288427 U CN 201620288427U CN 205641583 U CN205641583 U CN 205641583U
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- glass tube
- outer glass
- silver film
- type solar
- vacuum heat
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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 relates to a slot type solar vacuum heat collection tube belongs to the solar photothermal power application technique field. Still do not have a dependable performance at present, can reduce reverberation energy loss's slot type solar vacuum heat collection tube. The utility model discloses a glass outer tube and metal internal tube, metal internal tube is located the glass outer tube, the both ends of glass outer tube are fixed with metal internal tube's both ends respectively, form cyclic annular vacuum cavity between glass outer tube and metal internal tube, and its characteristics lie in: still include the silverskin layer, the silverskin level is in the inner wall of glass outer tube, the area less than or equal to glass outer tube inner wall area on this silverskin layer half the. The utility model has the advantages of reasonable structure design, the dependable performance can reduce reverberation energy loss.
Description
Technical field
This utility model relates to a kind of groove type solar vacuum heat collection pipe, is mainly used in slot type electricity generation system collection thermal sub-system equipment aspect, belongs to solar light-heat power-generation applied technical field.
Background technology
Solar light-heat power-generation refers to utilize large scale array parabolic or dish minute surface to collect solar thermal energy, is taken away by heat-conducting medium, and is produced steam by heat-exchanger rig, in conjunction with the technique of tradition steam turbine generator, thus reaches the purpose of generating.Groove type solar solar-thermal generating system refers to utilize grooved parabolic mirror solar light focusing to heat collector to be heated heat transfer medium, produces steam in heat exchanger, and pushing turbine drives the system of electrical power generators.Groove type solar generating is important photo-thermal power generation pattern, is also the photo-thermal power generation pattern that current commercialization degree is the highest.Solar light-heat power-generation system is mainly made up of parts such as optically focused subsystem, collection thermal sub-system, heat accumulation subsystem, power generation sub-system.Slot type vacuum heat collection pipe belongs to the collection thermal sub-system in groove type solar solar-thermal generating system.
Comparing tower type solar solar-thermal generating system, collection thermal sub-system (thermal-collecting tube) dispersion in groove type solar solar-thermal generating system arranges, and area is bigger, in order to reduce the thermal losses that convection current brings, the general vacuum heat-preserving that all uses, and inner tube do relatively thin, reduce area of dissipation.The metal inner pipe diameter of current business-like vacuum heat collection pipe is typically at about 70mm, outer glass tube is at about 115mm, and the light bore that cuts of light focusing unit is generally 5～7 meters, in order to improve collecting efficiency, require all to converge to the light more than 95% that light focusing unit reflects the elongated zones of 70mm, therefore for the intensity of steel construction of condenser system, the surface precision of reflecting mirror, installation accuracy, the tracking accuracy of drive system, there is the highest requirement, this just considerably increases the difficulty of equipment manufacturing, cost is remained high always, this problem governs the slot type power station commercialization process in China always.Therefore, it is badly in need of finding a kind of novel solution to go to process this contradiction.
Utility model content
The purpose of this utility model is that solving to reflect light present in prior art in groove type solar solar-thermal generating system easily deflects away from, and the problem high to systems, spot required precision, and a kind of reasonable in design is provided, dependable performance, can reduce the groove type solar vacuum heat collection pipe of energy of reflection light loss.
The technical scheme in the invention for solving the above technical problem is: this groove type solar vacuum heat collection pipe includes outer glass tube and metal inner pipe, described metal inner pipe is positioned at outer glass tube, two ends with metal inner pipe respectively, the two ends of described outer glass tube are fixed, ring-shaped vacuum chamber is formed between outer glass tube and metal inner pipe, its construction features is: also include silver film, described silver film is positioned at the inwall of outer glass tube, and the area of this silver film is less than or equal to the half of outer glass tube inner wall area.
As preferably, between silver film described in the utility model and outer glass tube inwall, it is additionally provided with the transition film layer for extending the silver film life-span.Before being coated with silver film, one or more layers transition film layer need to be coated with, as the cushion between glass and silver, to extend the life-span of silver film.The region that transition film layer is coated with should be bigger than silver film, and comprises silver film overlay area.
As preferably, silver film described in the utility model is provided with for preventing silver film from damaging because of scraping and reducing the protecting film layer of emergent gas amount from silver film.
As preferably, the outer wall of outer glass tube described in the utility model is provided with for protecting outside outer glass tube, increasing anti-ultraviolet radiation ability and the transition film layer of automatically cleaning ability.The when of being coated with transition film layer, it is not limited to silver-plated region, the inwall of the most whole outer glass tube can be plated, and on the premise of not increasing process flow complexity, it is possible to the outer wall at outer glass tube plates transition film layer simultaneously.
As preferably, this utility model is along outer glass tube cross section in the radial direction, and the arc length of described silver film accounts for 1/3rd of outer glass tube inwall circumferential length.Best compromise is sought between the consumption of silver and increase reflecting effect reducing.
As preferably, two ends with metal inner pipe respectively, the two ends of outer glass tube described in the utility model are fixed by sealing by fusing.
As preferably, the material of transition film layer described in the utility model is TiO2.Use sol-gal process, transition film layer is plated on outer glass tube, can play outside protection outer glass tube simultaneously, increase anti-ultraviolet radiation and the effect of automatically cleaning ability.
As preferably, silver film is brought the safe spacing of impact by high temperature when two ends of silver film described in the utility model to outer glass tube all exist for preventing at the two ends of outer glass tube two ends with metal inner pipe respectively to carry out sealing by fusing.Silver film region has with a certain distance from outer glass tube two ends, prevents high temperature when sealing by fusing from silver film is brought impact.
As preferably, this utility model can increase the amount of adsorbent in ring-shaped vacuum chamber, it is ensured that vacuum is not brought too much influence from the gas of silver film desorption.
This utility model is compared with prior art, have the following advantages and effect: regional area inside outer glass tube is done silver-plated process and forms silver film, the light spilt is made to be reflexed on metal inner pipe, add secondary reflection, decrease the loss of energy of reflection light, improve the performance of thermal-collecting tube, and thus reduce optically focused equipment (optically focused framework and reflecting curved surface) and follow the tracks of the requirement of system accuracy, advantageously reduce the unit price of trough system, thus promote trough system commercialization process.Meanwhile, secondary reflection makes the temperature of metal tube be more uniformly distributed, and reduces thermograde, decreases stress.Additionally, when being coated with transition film layer, in the case of inconspicuous increase cost, be also coated with one layer of useful transition film layer outside glass tubing, increase thermal-collecting tube automatically cleaning ability and anti-uv-ray, enhance product performance further simultaneously.Depending on the silver-plated area precision according to optically focused subsystem, if concentrating device and tracking accuracy are relatively low, then expand silver-plated area, but silver-plated area is less than the half of outer glass tube inner wall area.
Accompanying drawing explanation
Fig. 1 is the structural representation of groove type solar vacuum heat collection pipe in this utility model embodiment.
In figure: 1 outer glass tube；2 metal inner pipes；3 ring-shaped vacuum chambeies；4 silver films；5 reflection light.
Detailed description of the invention
The utility model is described in further detail below in conjunction with the accompanying drawings and by embodiment, and following example are that this utility model is not limited to following example to explanation of the present utility model.
Embodiment.
See Fig. 1, groove type solar vacuum heat collection pipe in the present embodiment includes outer glass tube 1, metal inner pipe 2 and silver film 4, metal inner pipe 2 is positioned at outer glass tube 1, two ends with metal inner pipe 2 respectively, the two ends of outer glass tube 1 are fixed, ring-shaped vacuum chamber 3 is formed between outer glass tube 1 and metal inner pipe 2, silver film 4 is positioned at the inwall of outer glass tube 1, and the area of this silver film 4 is less than or equal to the half of outer glass tube 1 inner wall area.Under normal circumstances, along outer glass tube 1 cross section in the radial direction, the arc length of silver film 4 accounts for 1/3rd of outer glass tube 1 inwall circumferential length.
It is additionally provided with the transition film layer for extending silver film 4 life-span between silver film 4 and outer glass tube 1 inwall in the present embodiment.The outer wall of outer glass tube 1 is provided with for protecting outside outer glass tube 1, increasing anti-ultraviolet radiation ability and the transition film layer of automatically cleaning ability.The material of transition film layer is TiO2。
It is provided with on silver film 4 in the present embodiment for preventing silver film 4 from damaging because of scraping and reducing the protecting film layer of emergent gas amount from silver film 4.
Two ends with metal inner pipe 2 respectively, the two ends of the outer glass tube 1 in the present embodiment are fixed by sealing by fusing.Silver film 4 is brought the safe spacing of impact by high temperature when silver film 4 all exists to two ends of outer glass tube 1 for preventing at the two ends of outer glass tube 1 two ends with metal inner pipe 2 respectively to carry out sealing by fusing.
Groove type solar vacuum heat collection pipe in the present embodiment has considered the practical situation of optically focused subsystem, such as the intensity of steel construction of condenser system, the surface precision of reflecting mirror, installation accuracy, the factor such as tracking accuracy of drive system.Can be substantially along (inside and outside metal inner pipe 2 and outer glass tube 1 nested by main flow slot type vacuum heat collection pipe structure, middle evacuation) on the basis of, it is made that reasonably improvement, silver film 4 it is coated with as reflecting layer in the inner side of outer glass tube 1, when metal inner pipe 2 receives the reflection light 5 from reflecting curved surface when, partially reflective light 5 likely deflects away from, silver film 4 plays the effect to reflection light 5 secondary focusing, the reflection light 5 deflecting away from metal inner pipe 2 is converged to the opposite side of metal inner pipe 2, such way is also beneficial to the uniform of metal inner pipe 2 temperature, reduces stress.Before being coated with silver film 4 to outer glass tube 1, first (optional sol-gal process is all coated with TiO in the interior outside of outer glass tube 1 to one layer of transition film layer of plating2Film layer), increase the adhesive force between silver film 4 and glass, simultaneously at the outside of outer glass tube 1, TiO2Film too increases automatically cleaning and anti-ultraviolet ability.
Groove type solar vacuum heat collection pipe in the present embodiment is coated with silver film 4 inside outer glass tube 1, so that the light originally deflected away from does secondary reflection, converges to, on metal inner pipe 2, decrease energy loss.The outer glass tube general 110～115mm of business-like slot type thermal-collecting tube, just because of there being silver film to make secondary condensation, the tolerance for equipment precision is greatly increased, and this is for reducing cost, expand the scale of production and provide advantage, thus promote the groove type solar business-like process of generating.Regional area inside outer glass tube 1 is done silver-plated process, add secondary reflection, decrease the loss of energy of reflection light, improve the performance of thermal-collecting tube, and thus reduce optically focused equipment (optically focused framework and reflecting curved surface) and follow the tracks of the requirement of system accuracy, provide probability for reducing the unit price of trough system, thus promote trough system commercialization process.
Furthermore, it is necessary to illustrate, the specific embodiment described in this specification, the shape of its parts and components, be named title etc. can be different, and the above content described in this specification is only to this utility model structure example explanation.All equivalence changes done according to structure, feature and the principle described in this utility model inventional idea or simple change, be all included in the protection domain of this utility model patent.Described specific embodiment can be made various amendment or supplements or use similar mode to substitute by this utility model person of ordinary skill in the field; without departing from structure of the present utility model or surmount scope defined in the claims, protection domain of the present utility model all should be belonged to.
Claims (8)
1. a groove type solar vacuum heat collection pipe, including outer glass tube and metal inner pipe, described metal inner pipe is positioned at outer glass tube, two ends with metal inner pipe respectively, the two ends of described outer glass tube are fixed, ring-shaped vacuum chamber is formed between outer glass tube and metal inner pipe, it is characterized in that: also include that silver film, described silver film are positioned at the inwall of outer glass tube, the area of this silver film is less than or equal to the half of outer glass tube inner wall area.
Groove type solar vacuum heat collection pipe the most according to claim 1, it is characterised in that: it is additionally provided with the transition film layer for extending the silver film life-span between described silver film and outer glass tube inwall.
Groove type solar vacuum heat collection pipe the most according to claim 1, it is characterised in that: it is provided with on described silver film for preventing silver film from damaging because of scraping and reducing the protecting film layer of emergent gas amount from silver film.
Groove type solar vacuum heat collection pipe the most according to claim 1, it is characterised in that: the outer wall of described outer glass tube is provided with for protecting outside outer glass tube, increasing anti-ultraviolet radiation ability and the transition film layer of automatically cleaning ability.
Groove type solar vacuum heat collection pipe the most according to claim 1, it is characterised in that: along outer glass tube cross section in the radial direction, the arc length of described silver film accounts for 1/3rd of outer glass tube inwall circumferential length.
Groove type solar vacuum heat collection pipe the most according to claim 1, it is characterised in that: two ends with metal inner pipe respectively, the two ends of described outer glass tube are fixed by sealing by fusing.
7. according to the groove type solar vacuum heat collection pipe described in claim 2 or 4, it is characterised in that: the material of described transition film layer is TiO2。
Groove type solar vacuum heat collection pipe the most according to claim 6, it is characterised in that: silver film is brought the safe spacing of impact by high temperature when two ends of described silver film to outer glass tube all exist for preventing at the two ends of outer glass tube two ends with metal inner pipe respectively to carry out sealing by fusing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620288427.0U CN205641583U (en) | 2016-04-08 | 2016-04-08 | Slot type solar vacuum heat collection tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620288427.0U CN205641583U (en) | 2016-04-08 | 2016-04-08 | Slot type solar vacuum heat collection tube |
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| CN205641583U true CN205641583U (en) | 2016-10-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201620288427.0U Active CN205641583U (en) | 2016-04-08 | 2016-04-08 | Slot type solar vacuum heat collection tube |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108362010A (en) * | 2018-05-15 | 2018-08-03 | 中国科学院电工研究所 | A kind of groove type solar thermal-collecting tube for high temperature |
| CN108870770A (en) * | 2018-07-20 | 2018-11-23 | 北京兆阳能源技术有限公司 | A kind of production method of reception device and glass baseplate |
-
2016
- 2016-04-08 CN CN201620288427.0U patent/CN205641583U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108362010A (en) * | 2018-05-15 | 2018-08-03 | 中国科学院电工研究所 | A kind of groove type solar thermal-collecting tube for high temperature |
| CN108870770A (en) * | 2018-07-20 | 2018-11-23 | 北京兆阳能源技术有限公司 | A kind of production method of reception device and glass baseplate |
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