CN101839578A - Preparation method and product of vacuum heat-collecting element of inner glass tube covered, patched and sprayed with metal - Google Patents
Preparation method and product of vacuum heat-collecting element of inner glass tube covered, patched and sprayed with metal Download PDFInfo
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- CN101839578A CN101839578A CN201010123873A CN201010123873A CN101839578A CN 101839578 A CN101839578 A CN 101839578A CN 201010123873 A CN201010123873 A CN 201010123873A CN 201010123873 A CN201010123873 A CN 201010123873A CN 101839578 A CN101839578 A CN 101839578A
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- glass tube
- inner glass
- metal
- vacuum heat
- collecting element
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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
Abstract
The invention relates to a preparation method of a vacuum heat-collecting element of an inner glass tube covered, patched and sprayed with metal. The method is to connect covering metal material, patching metal, spray metal and plating metal with an inner glass tube under low thermal resistance to prepare base metal. The vacuum heat-collecting element of the inner glass tube covered, patched and sprayed with metal prepared by the method is prepared from the inner glass tube and a shielding glass tube through melting sealing and evacuating. The vacuum heat-collecting element is characterized in that the inner glass tube is covered with metal material or patched, sprayed and plated with metal layers which are called base metal; and the base metal contains an absorption film. The beneficial effects of the invention are as follows: the melting sealing technology with high reliability and low cost is maintained; and more selective absorption films based on base metal can be obtained. The selective absorption film on the base metal has higher absorptivity and lower emissivity, and can collect heat stably and efficiently under high temperature and greatly reduce the absorption film maximum temperature in the concentrating and heat-collecting mode, lower heat loss and prolong the life of the absorption film. Two embodiments are provided in combination with figures.
Description
Technical field
The present invention relates to the inner glass tube parcel and ward off metalling vacuum heat collection element manufacture method product.
Background technology
Existing all-glass vacuum thermal-collecting tube adopts inner glass tube and cover glass tube to melt envelope, has reliability height, advantage that cost of manufacture is low.But because of being limited to vacuum sputtering absorbing film on the inner glass tube, its performance is subjected to the influence of glass substrate that big development or breakthrough can not be arranged.For example be difficult to obtain efficient under medium and high temperature, as to stablize thermal-arrest selective absorbing film.
Summary of the invention
The objective of the invention is to provide the inner glass tube parcel to ward off metalling vacuum heat collection element manufacture method product.
The present invention solves the method that its technical problem is taked: comprising: 1) low thermal resistance connects parcel layer of metal material on the inner glass tube of one one end circle envelope, and described metal material does not have wing plate shape; 2) the last layer metal is handled and warded off to the inner glass tube outer surface of one one end circle envelope; 3) layer of metal is handled and sprayed to the inner glass tube outer surface of one one end circle envelope; 4) the inner glass tube outer surface of one one end circle envelope is handled comprised one deck conductive layer be set, and at this inner glass tube outer surface by electroplating or chemical replacement forms the coat of metal.Above-mentioned metal material and ward off, spraying, electroplated metal layer be called for short base metal.Base metal will be stood the high temperature of follow-up vacuum bakeout.And require in the heat-collecting temperature scope, still keep low thermal resistance to connect during the metal material expanded by heating of parcel.On inner glass tube, ward off, the concrete making of spraying, plated metal can with reference in the prior art about on glass or insulator, ward off, spray, the content of plating or chemical replacement metal.Base metal can wrap up inner glass tubes by 360 ° of angles of circumference; Also can partly wrap up inner glass tube less than 360 ° angle of circumference.All or part of outer surface at base metal is made absorbing film, comprises the selective absorbing film that vacuum sputtering selective absorbing film and electrochemical process are made.Inner glass tube also can be the hot junction of a heat pipe.The above-mentioned inner glass tube circle envelope that is shaped on absorbing film is inserted the cover glass tube of one one end circle envelope inwardly, and melt envelope with cover glass tube, again the interlayer between two glass tubes is vacuumized and can working medium, make an inner glass tube parcel and ward off metalling vacuum heat collection element or heat-tube vacuum heat collecting element.
The present invention solves one of technical scheme that its technical problem takes according to said method: low thermal resistance connects parcel layer of metal material on inner glass tube, makes absorbing film on this metal material.Described metal material does not have wing plate shape.Inner glass tube is inserted cover glass tube and melt envelope with cover glass tube, vacuumize and can working medium, make the vacuum heat collection element or the heat collector tube element of an inner glass tube coated metal inner glass tube.
The present invention solves two of technical scheme that its technical problem takes according to said method: ward off metal on inner glass tube, ward off at this and make absorbing film on metal level.Inner glass tube is inserted cover glass tube and melt envelope with cover glass tube, vacuumize and can working medium, make vacuum heat collection element or heat collector tube element that an inner glass tube is warded off metal.
The present invention solves three of technical scheme that its technical problem takes according to said method: spray metal on inner glass tube.On this spray metal layer, make absorbing film.Inner glass tube is inserted cover glass tube and melt envelope with cover glass tube, vacuumize and can working medium, make the vacuum heat collection element or the heat collector tube element of an inner glass tube spray metal.
The present invention solves four of technical scheme that its technical problem takes according to said method: internally glass tube exterior surface is handled and is comprised one deck conductive layer is set, and at this inner glass tube outer surface by electroplating or chemical replacement forms the coat of metal.On this coat of metal, make absorbing film or directly utilize this coat of metal to make absorbing film.Inner glass tube is inserted cover glass tube and melt envelope with cover glass tube, vacuumize and can working medium, make the vacuum heat collection element or the heat collector tube element of an inner glass tube plating.
Its fusing point also can be set between metal material that wraps up inner glass tube and inner glass tube for example wrap up inner glass tube with aluminium plating zinc plate at the low-melting-point metal of 200～500 ℃ of scopes.The alumin(i)um zinc alloy of plate surface is exactly a low-melting-point metal.
Also can on inner glass tube, comprise that wire or metal bring manufacturing inner glass tube parcel to ward off the vacuum heat collection element of metalling by low thermal resistance connection Wound wire shape thing.The gap that can have 2～10 times of wire diameters or metal tape width between adjacent two one metal wires or the metal tape; Also can not having the gap reels.
Also can adopt roll bending spare parcel inner glass tube, and the conduit that is communicated with vacuum heat-insulating layer is set on roll bending spare.
Also can on the metal material of parcel inner glass tube, hole be set, comprise the hole of even distribution, outward flanging.
Beneficial effect of the present invention comprises: base metal is being set on the inner glass tube and makes absorbing film on base metal, both kept high reliability, inner glass tube and cover glass tube melt envelope technology cheaply, can design more selective absorbing films again and comprise middle high-temperature selective absorbing film based on base metal.Metal such as gold, silver, copper, aluminium, nickel or molybdenum have good electric conductivity and good thermal conductivity, infrared high reflection are promptly launched than low.Base metal has strengthened the binding ability with absorbing film, makes it can stand higher temperature.This makes the selective absorbing film that is made on the base metal have higher absorptivity, lower emissivity; Can under hot conditions, stablize, thermal-arrest efficiently; Can reduce absorbing film maximum temperature, minimizing heat waste, the prolongation absorbing film life-span at focal spot place under the light and heat collection pattern significantly.
Its fusing point is at the low-melting-point metal of 200～500 ℃ of scopes between parcel metal material of inner glass tube and inner glass tube, and reaches this fusion temperature make low-melting-point metal melt crystallization again when baking, can obtain the desirable heat transfer interface to inner glass tube.Do not run off when utilizing inner glass tube and parcel metal material thereon that the interaction energies such as capillary force of low-melting-point metal are guaranteed the low-melting-point metal fusing.
Wound wire shape thing on inner glass tube can adopt thinner metal material, can make metal material that the inner glass tube of being reeled is had uniform pressure, helps reducing thermal resistance.On inner glass tube the thread thing of coiling layer of metal as ward off, substrate that metal spraying belongs to and as electroplated electrode can obtain to ward off uniformly, spray and plated metal layer thickness and good surface quality.The curved surfaces that the filiform of being reeled has also is considered to follow the tracks of the effect of the sun.
Description of drawings
Further be illustrated below in conjunction with drawings and Examples.
Fig. 1 is the structural representation of the heat-tube vacuum heat collecting element of an inner glass tube coated metal roll bending spare.
Fig. 2 is the structural representation of the vacuum heat collection element of another inner glass tube coated metal roll bending spare.
1. cold junctions among the figure; 2. inner glass tube; 3. cover glass tube; 4. roll bending spare; 5. flap; 6. vacuum heat-insulating layer; 7. conduit.
The specific embodiment
Among Fig. 1, the inner glass tube 2 of double as heat pipe cold junction 1 and cover glass tube 3 melt to be honored as a queen and vacuumize the heat-tube vacuum heat collecting element of making an inner glass tube coated metal roll bending spare 4.Metallic coil plate 4 adopts galvanized steel plain sheet, is shaped on absorbing film on it, and its two straight flanges respectively contain one section flap 5.Two sections flaps 5 can adopt the electric resistance welding stitch welding to connect, and make roll bending spare 4 all wrap up inner glass tube 2 with 360 ° of angles of circumference.Require the edge of welding back roll bending spare 4 not contact with cover glass tube 3.Can form the bigger pressure of 4 pairs of inner glass tubes of roll bending 2 by welding, help to reduce thermal resistance between the two.
Among Fig. 2, inner glass tube 2 and cover glass tube 3 melt envelope and vacuumize the vacuum heat collection element of making an inner glass tube coated metal roll bending spare 4.Be shaped on absorbing film on the roll bending spare 4 and contain the conduit 7 that is communicated with vacuum heat-insulating layer 6.
On the metallic coil plate 4 of parcel inner glass tube, equally distributed hole is set, and the conduit 7 that is communicated with vacuum heat-insulating layer 6 of setting, help to vacuumize.Such roll bending spare 4 can adopt special veneer reeling machine processing and fabricating.
Fig. 2 embodiment adopts embedded metal roll bending spare 4 partly to wrap up inner glass tube 2 with the angle of circumference less than 360 °.Can either guarantee that roll bending spare 4 is close to inner glass tube 2, can save material again, also convenient the manufacturing, and can reduce the discharge quantity of metal parts in the vacuum heat-insulating layer.
When needing, can also add one spring part of hoop, to guarantee reliable connection the between roll bending spare 4 and the inner glass tube 2 in the outside of embedded metal roll bending spare 4.
Through vacuum bakeout, the zinc fusing forms the good heat transfer interface.
Maiden trial adopts three target vacuum sputtering coating machines, 410 ℃ of bakings, and the absorptivity of galvanized sheet absorbing film is 93.1%.
Claims (10)
1. the inner glass tube parcel is warded off metalling vacuum heat collection element manufacture method: comprising: 1) parcel layer of metal material on the inner glass tube of one one end circle envelope, and described metal material does not have wing plate shape; 2) the last layer metal is handled and warded off to the inner glass tube outer surface of one one end circle envelope; 3) layer of metal is handled and sprayed to the inner glass tube outer surface of one one end circle envelope; 4) the inner glass tube outer surface of one one end circle envelope is handled comprised one deck conductive layer be set, and at this inner glass tube outer surface by electroplating or chemical replacement forms the coat of metal; Above-mentioned metal material and ward off, spraying, electroplated metal layer be called for short base metal; Base metal can wrap up inner glass tubes by 360 ° of angles of circumference; Also can partly wrap up inner glass tube less than 360 ° angle of circumference; All or part of outer surface at base metal is made absorbing film, comprises the selective absorbing film that vacuum sputtering selective absorbing film and electrochemical process are made; Inner glass tube also can be the hot junction of a heat pipe; The above-mentioned inner glass tube circle envelope that is shaped on absorbing film is inserted the cover glass tube of one one end circle envelope inwardly and melted envelope with cover glass tube, again the interlayer between two glass tubes is vacuumized and can working medium, make vacuum heat collection element or heat-tube vacuum heat collecting element that an inner glass tube parcel is warded off metalling.
2. the inner glass tube coated metal vacuum heat collection element of making according to the described method of claim 1, comprise the heat-tube vacuum heat collecting element, melting envelope by inner glass tube and cover glass tube vacuumizes and makes, it is characterized in that the low thermal resistance connection is enclosed with the layer of metal material on the inner glass tube, contain absorbing film on the described metal material; Described metal material does not have wing plate shape.
3. ward off the metal vacuum heat collecting element according to the inner glass tube of the described method manufacturing of claim 1, comprise the heat-tube vacuum heat collecting element, melt envelope by inner glass tube and cover glass tube and vacuumize and make, it is characterized in that containing on the inner glass tube one deck and ward off metal level, described warding off contained absorbing film on the metal level.
4. the inner glass tube spray metal vacuum heat collection element of making according to the described method of claim 1, comprise the heat-tube vacuum heat collecting element, melting envelope by inner glass tube and cover glass tube vacuumizes and makes, it is characterized in that containing on the inner glass tube layer of metal sprayed coating, contain absorbing film on the described sprayed metal coating.
5. the inner glass tube plating vacuum heat collection element of making according to the described method of claim 1, comprise the heat-tube vacuum heat collecting element, melt envelope by inner glass tube and cover glass tube and vacuumize and make, it is characterized in that the inner glass tube outer surface contains layer of metal coating, contains absorbing film on the described coat of metal.
6. according to claim 2 or 3 or 4 or 5 described heat collecting elements, it is characterized in that the low thermal resistance connection is wound with wire on the inner glass tube.
7. heat collecting element according to claim 2 is characterized in that wrapping up between the metal material of inner glass tube and the inner glass tube and contains the low-melting-point metal of its fusing point 200～500 ℃ of scopes.
8. heat collecting element according to claim 2, the metal material that it is characterized in that wrapping up inner glass tube is a roll bending spare, described roll bending spare contains the conduit that is communicated with vacuum heat-insulating layer.
9. heat collecting element according to claim 2, the metal material that it is characterized in that wrapping up inner glass tube is a roll bending spare, and two straight flanges of described roll bending spare respectively contain one section flap, and two sections flap stitch welding connect.
10. heat collecting element according to claim 2 is characterized in that the metal material that wraps up inner glass tube contains hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010123873A CN101839578A (en) | 2010-03-12 | 2010-03-12 | Preparation method and product of vacuum heat-collecting element of inner glass tube covered, patched and sprayed with metal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010123873A CN101839578A (en) | 2010-03-12 | 2010-03-12 | Preparation method and product of vacuum heat-collecting element of inner glass tube covered, patched and sprayed with metal |
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| Publication Number | Publication Date |
|---|---|
| CN101839578A true CN101839578A (en) | 2010-09-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201010123873A Pending CN101839578A (en) | 2010-03-12 | 2010-03-12 | Preparation method and product of vacuum heat-collecting element of inner glass tube covered, patched and sprayed with metal |
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| CN (1) | CN101839578A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2474960Y (en) * | 2001-05-10 | 2002-01-30 | 战余英 | Vacuum glass solar energy heat collecting tube |
| CN101266080A (en) * | 2008-05-08 | 2008-09-17 | 山东桑乐太阳能有限公司 | Selective solar energy absorbing coating and method for making same |
-
2010
- 2010-03-12 CN CN201010123873A patent/CN101839578A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2474960Y (en) * | 2001-05-10 | 2002-01-30 | 战余英 | Vacuum glass solar energy heat collecting tube |
| CN101266080A (en) * | 2008-05-08 | 2008-09-17 | 山东桑乐太阳能有限公司 | Selective solar energy absorbing coating and method for making same |
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Open date: 20100922 |