CN102305483A - Heat collection tube for trough-type solar thermal power generation - Google Patents
Heat collection tube for trough-type solar thermal power generation Download PDFInfo
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- CN102305483A CN102305483A CN201110274508A CN201110274508A CN102305483A CN 102305483 A CN102305483 A CN 102305483A CN 201110274508 A CN201110274508 A CN 201110274508A CN 201110274508 A CN201110274508 A CN 201110274508A CN 102305483 A CN102305483 A CN 102305483A
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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
Abstract
The invention relates to a vacuum heat collection tube for trough-type solar thermal power generation, and belongs to the technical field of solar thermal utilization. The vacuum heat collection tube is characterized in that an indirect encapsulation structure is used for glass-to-metal sealing connection; mature and simplified unload modes are adopted for an unload device; and in order to improve heat exchange efficiency of a metal straight tube, a spoiler is added at the port of the metal tube. The vacuum heat collection tube disclosed by the invention has few other components, simple process and low manufacturing cost, and therefore the tube is not only applicable to solar thermal power generation, but also applicable to other small trough-type heat utilization devices for solar air conditioner refrigeration, solar sea water desalination and the like.
Description
Technical field
The present invention relates to a kind of vacuum heat collection pipe that trough type solar power generation is used that is used for; Indirect encapsulating structure is adopted in its glass-to-metal sealing, and discharge mechanism is continued to use unloading mode ripe and simplification, is the heat exchange efficiency that improves metal straight pipe; Increase spoiler at the metal tube port; Parts are few in addition, technology simple, low cost of manufacture because of it, are not only applicable to solar energy thermal-power-generating, also are fit to other like small-sized slot type heat utilization device such as solar airconditioning refrigeration, solar seawater desalinations.Belong to the solar energy utilization technique field.
Background technology
At present, both at home and abroad about the difference of the vacuum heat collection pipe that in the trough type solar power generation device, uses mainly on structural design and sealing-in mode.What Solel and Archimede company adopted is outer unloading structure, and what Schott company adopted is interior unloading structure, and the hot melt sealing-in is all adopted in glass-to-metal sealing, but the glass material of concrete grammar and use is variant.China recent years begins to accelerate the research and development paces to the trough type solar power generation thermal-collecting tube, but therefore institute of a lot of universities and colleges and enterprise can't fundamentally surmount external thermal-collecting tube owing to be limited by glass material.Inventor's 200420091975.1 and 200620113317.7 utility model patents; And 200610138447.0 and 200710090246.2 etc. patent of invention be suitable for suitability for industrialized production fully through producing proof; This thermal-collecting tube has the not available enhanced heat exchange function of external thermal-collecting tube, in solar airconditioning refrigeration and large-scale tank-type thermal power generation device, uses.But from case making, find; The sealing structure of thermal-collecting tube and enhanced heat exchange mode also have the leeway of further optimizing; For further improving stability and reliability; In through engineering approaches and industrialization, new breakthrough is arranged, constantly dwindle the gap with external like product, should on above-mentioned patent basis, be optimized by sealing structure and the disturbing flow device to the trough type solar power generation thermal-collecting tube.
Summary of the invention
Technical problem to be solved by this invention is to adopt to seal stability and the reliability that the compression sealing technology improves trough type solar power generation heat-collecting tube sealing structure and discharge mechanism indirectly.
The alleged problem of the present invention is solved by following technical scheme:
The trough type solar power generation thermal-collecting tube cuts pipe, metal inner pipe, metal end, iron nickel by glass outer tube, glass and can cut down part, unloading bellows, glass sealing material, pipe connecting piece, the ring of cooling down, blast pipe, spoiler and forms, it is characterized in that: unload bellows and be arranged on the thermal-collecting tube two ends; It is the Baltimore groove tube-like piece that iron nickel can cut down part; Glass cuts pipe and inserts in the Baltimore groove through the sealing-in of glass sealing material hot melt; Other end ring port inside or outward flanging and the welding of unloading bellows one end argon arc; The welding of unloading the bellows other end and pipe connecting piece argon arc, pipe connecting piece and metal inner pipe argon arc weld, metal inner pipe outer surface vacuum sputtering is high temperature resistant selective thermal absorber coatings; Cool down loops welded on metal inner pipe.
The said glass outer tube selection wire coefficient of expansion is 33 * 10
-7/ ℃ high hard high transmission rate and 3.3 high-boron-silicon glass pipes with high-fire resistance; High-boron-silicon glass also claims to send Simon Rex glass, and is very extensive in China's solar water heater sector application, and cost is also very low, though linear expansion coefficient is 33 * 10
-7/ ℃, be difficult to and domestic kovar alloy match materials, but its physical property is well suited for solar energy thermal-power-generating.Or the selection wire coefficient of expansion is (40-65) * 10
-7/ ℃ neutrality 5.0 Pyrex.
It is the glass short tube that forms according to instructions for use glass-cutting outer tube that said glass cuts pipe, and the purpose of cutting is in order to implement glass-to-metal sealing better.
Said iron nickel can cut down part one end and strike out the Baltimore groove tube-like piece, the dark 5-10mm of groove, the other end inside or outward flanging and the welding of unloading bellows; Preferred iron nickel cobalt glass sealing alloy 4J29,4J44, linear expansion coefficient is (46-55) * 10 in the time of 20-450 ℃
-7/ ℃; Or select 4J42,4J45, linear expansion coefficient is (40-75) * 10 in the time of 20-450 ℃
-7/ ℃ iron nickel kovar alloy; Wall thickness is advisable with 0.3-2mm.As shown in Figure 2.
The linear expansion coefficient of said glass sealing material is (40-65) * 10
-7/ ℃, cut pipe and iron nickel can cut down between the part between glass, softening and wandering temperature is 300-800 ℃; The low-melting-point glass powder lead oxide content of selecting is between 30-60%; Like outer glass pipe is that neutral density glass then can be selected the lead-free low-melting-point glass powder.
Said unloading ripple tube wave joint number is at the 2-20 ripple, and the bellows wall thickness is 0.18-0.3mm, wave height 5-16mm, pitch of waves 3-12mm, bellows inside nominal diameter 32-100mm; Anti-fatigue life should be greater than 30,000 times; Preferred SUS304,321 or SUS316,316L stainless steel material.
Said pipe connecting piece is the plate-like piece of central bore flange, and endoporus and metal inner pipe are complementary, the welding of turn-up portion and metal inner pipe, and planar section end and the welding of unloading bellows argon arc, material is SUS304,321 or SUS316,316L stainless steel, wall thickness is 0.3-2mm; In adopting during unloading structure pipe connecting piece be an end reducing, the tube-like piece of other end enlarging; Necking end and the welding of metal inner pipe argon arc, flared end and the welding of unloading bellows, as shown in Figure 3.
Said metal inner pipe inside nominal diameter is between 25-80mm; Wall thickness is between 0.3-13mm; Nominal pressure between 0.6-25MPa, preferred SUS304,321 or the ultra-supercritical boiler of SUS316,316L gapless stainless steel tube or high temperature resistant, intergranular corrosion resistance with XA704, TP347H, SUPER304H, TP310HCbN alloy seamless steel pipe; Metal inner pipe is a metal straight pipe, or bellows tube, or inner helix pipe, or luxuriant bulk wave pipe joint.
Said spoiler is a stainless steel substrates, strikes out tail-likely, and an end flange point is welded on the metal inner pipe port inner wall, and the other end is suitably crooked with disturbance working medium fluid, one to three spoiler of each thermal-collecting tube welding; Or spoiler is designed to width rectangle or the square identical with the metal inner pipe diameter, and the effect of two-way disturbance fluid is played respectively to the both sides flange in centre punched openings in echelon, and trapezoidal hypotenuse is connected with matrix, and the spoiler two ends are welded on the metal inner pipe inwall.As shown in Figure 4.
Said blast pipe is 33 * 10
-7/ ℃ high-boron-silicon glass pipe or neutral borosilicate glass tube, internal diameter 8-20mm, welding cuts on the pipe at glass outer tube or glass.
Said compression sealing-in is meant anti-(pressure) strength characteristics of opening of utilizing high-boron-silicon glass outstanding; Soft glass transition sealing in the middle of between metal and glass, adopting; Iron nickel can cut down and put into pulpous state low-melting-point glass powder in the part groove; And glass is cut Guan Yiduan insert iron nickel and can cut down that sealing by fusing connects in the part groove, guarantee the air-tightness and the reliability of glass-to-metal sealing.
The parts that the present invention uses are few, and technology is simple, and adopts brand-new sealing by fusing structure and spoiler structure, and manufacturability and heat absorption efficient are further improved.
Description of drawings
Fig. 1 is that the present invention unloads the sealing structure sketch map outward
Fig. 2 is that the present invention unloads the assembly sketch map outward
Fig. 3 is a unloading sealing structure sketch map in the present invention
Fig. 4 is the trapezoidal spoiler structural representation of the present invention
Wherein: 1 glass outer tube, 2 metal inner pipes, 3 iron nickel can cut down cool down ring, 7 blast pipes, 8 glass of part, 4 unloading bellowss, 5 pipe connecting pieces, 6 and cut pipe, 9 spoilers
The specific embodiment
1) at first iron nickel can be cut down part (3) punching stretch and become groove shape tube-like piece, other end flange, subsequent use after the pre-oxidation treatment in 800-1100 ℃ of wet hydrogen environment.
2) become glass to cut pipe (8) glass outer tube (1) pipe cutting; It is corresponding that sealed end and iron nickel can cut down part (3) groove ends, the pulpous state glass sealing material after being in harmonious proportion evenly is coated in glass cuts pipe (8) and can cut down part (3) groove sealed end with iron nickel, the advance method of sealing by fusing of bonding back static sealing by fusing of employing or tunnel cave; After treating that iron nickel kovar alloy (3) and glass cut the abundant welding of pipe (8); Welding blast pipe (7), and press the heat treatment of glass operational procedure, warp is annealed, destressing is subsequent use.
3) glass that connects of sealing by fusing cuts pipe (8) and carries out helium mass spectrum leak detection, guarantees air-tightness and sealing strength.
4) have that glass that iron nickel can cut down part (3) cuts pipe (8) and glass outer tube (2) sealing by fusing on glass work lathe connects, it is subsequent use to anneal.
5) metal inner pipe (2) polishing, leak detection, 500 ℃ of vacuum environment high-temperature degassing are put into the high temperature resistant selective thermal absorber coatings of coating chamber sputter, and will cool down ring (6) and spoiler (9) are welded on the outer surface and inner surface of metal inner pipe (2), and be subsequent use.
6) assembling homogeneous tube inserts the metal inner pipe behind the plated film (2) in the glass outer tube (1) in the middle of pipe connecting piece (5) in proper order.
7) pipe connecting piece of an end (5) and metal inner pipe (2) argon arc welding stretches before pipe connecting piece of the other end (5) and the welding of metal inner pipe (2) argon arc, makes the unloading bellows (4) at two ends become closure state, welds with metal inner pipe (2) then.Interior unloading structure is opposite, treats that the bellows node at two ends all opens back enforcement welding.
8) vacuum reached 3 * 10 in 400 ℃ of high-temperature vacuum exhausts of warp guaranteed on the vacuum exhaust platform after the assembled
-3
9) on high-frequency induction welder, activate getter, common name " roasting disappearing " confirms that through leak detection vacuum meets technical indicator.As shown in Figure 1 after the homogeneous tube process finishing, obtain novel slot solar energy thermal-power-generating thermal-collecting tube.
Claims (8)
1. a trough type solar power generation thermal-collecting tube cuts pipe, metal inner pipe, iron nickel by glass outer tube, glass and can cut down part, unloading bellows, glass sealing material, pipe connecting piece, the ring of cooling down, blast pipe, spoiler and forms, it is characterized in that: unload bellows and be arranged on the thermal-collecting tube two ends; It is the Baltimore groove tube-like piece that iron nickel can cut down part; Glass cuts pipe and inserts in the Baltimore groove through the sealing-in of glass sealing material hot melt; Other end ring port inside or outward flanging and the welding of unloading bellows one end argon arc; The unloading bellows other end and the welding of pipe connecting piece argon arc, pipe connecting piece and the welding of metal inner pipe argon arc; Metal inner pipe outer surface vacuum sputtering is high temperature resistant selective thermal absorber coatings; Cool down loops welded on metal inner pipe.
2. trough type solar power generation thermal-collecting tube according to claim 1 is characterized in that: the said glass outer tube selection wire coefficient of expansion is 33 * 10
-7/ ℃ high hard high transmission rate and 3.3 high-boron-silicon glass pipes with high-fire resistance; Or linear expansion coefficient is (40-65) * 10
-7/ ℃ neutrality 5.0 Pyrex.
3. trough type solar power generation thermal-collecting tube according to claim 1 is characterized in that: said iron nickel can cut down part one end and strike out the Baltimore groove tube-like piece, the dark 5-10mm of groove, the other end inside or outward flanging and the welding of unloading bellows; Preferred iron nickel cobalt glass sealing alloy 4J29,4J44, linear expansion coefficient is (46-55) * 10 in the time of 20-450 ℃
-7/ ℃; Or select 4J42,4J45, linear expansion coefficient is (40-75) * 10 in the time of 20-450 ℃
-7/ ℃ iron nickel kovar alloy; Wall thickness is advisable with 0.3-2mm.
4. trough type solar power generation thermal-collecting tube according to claim 1 is characterized in that: the linear expansion coefficient of said glass sealing material is (40-65) * 10
-7/ ℃, cut pipe and iron nickel can cut down between the part between glass, softening and wandering temperature is 300-800 ℃; The low-melting-point glass powder lead oxide content of selecting is between 30-60%; Or selection lead-free low-melting-point glass powder.
5. trough type solar power generation thermal-collecting tube according to claim 1 is characterized in that: said unloading ripple tube wave joint number is at the 2-20 ripple, and the bellows wall thickness is 0.18-0.3mm, wave height 5-16mm, pitch of waves 3-12mm, bellows inside nominal diameter 32-100mm; Anti-fatigue life should be greater than 30,000 times; Preferred SUS304,321 or SUS316,316L stainless steel material.
6. trough type solar power generation thermal-collecting tube according to claim 1; It is characterized in that: said pipe connecting piece is the plate-like piece of central bore flange; Endoporus and metal inner pipe are complementary, turn-up portion and metal inner pipe welding, planar section end and the welding of unloading bellows argon arc; Material is SUS304,321 or SUS316,316L stainless steel, and wall thickness is 0.3-2mm; In adopting during unloading structure pipe connecting piece be an end reducing, the tube-like piece of other end enlarging; Necking end and the welding of metal inner pipe argon arc, flared end and the welding of unloading bellows.
7. trough type solar power generation thermal-collecting tube according to claim 1; It is characterized in that: the inside nominal diameter of said metal inner pipe is between 25-80mm; Wall thickness is between 0.3-13mm; Nominal pressure between 0.6-25MPa, preferred SUS304,321 or the ultra-supercritical boiler of SUS316,316L gapless stainless steel tube or high temperature resistant, intergranular corrosion resistance with XA704, TP347H, super SUPER304H, TP310HCbN alloy seamless steel pipe; Metal inner pipe is a metal straight pipe, or bellows tube, or inner helix pipe, or luxuriant bulk wave pipe joint.
8. trough type solar power generation thermal-collecting tube according to claim 1; It is characterized in that: said spoiler is a stainless steel substrates; Strike out tail-like; End flange point is welded on the metal inner pipe port inner wall, and the other end is suitably crooked with disturbance working medium fluid, one to three spoiler of each thermal-collecting tube welding; Or spoiler is designed to width rectangle or the square identical with the metal inner pipe diameter, and the effect of two-way disturbance fluid is played respectively to the both sides flange in centre punched openings in echelon, and trapezoidal hypotenuse is connected with matrix, and the spoiler two ends are welded on the metal inner pipe inwall.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110274508A CN102305483A (en) | 2011-09-16 | 2011-09-16 | Heat collection tube for trough-type solar thermal power generation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110274508A CN102305483A (en) | 2011-09-16 | 2011-09-16 | Heat collection tube for trough-type solar thermal power generation |
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| CN102305483A true CN102305483A (en) | 2012-01-04 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102563930A (en) * | 2012-02-24 | 2012-07-11 | 中国西电集团公司 | High-temperature vacuum solar collector tube with outlaid expansion joint for solar power generation |
| CN103267377A (en) * | 2013-05-08 | 2013-08-28 | 南京溧马新能源科技有限公司 | Solar vacuum heat-collecting tube with fluid mixer |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101363664A (en) * | 2008-10-09 | 2009-02-11 | 西安交通大学 | Focussing groove type solar thermal absorber of single side multi-longitudinal whorl strengthened heat exchange |
| CN101769617A (en) * | 2008-12-31 | 2010-07-07 | 北京环能海臣科技有限公司 | Solar collector with horizontally inserted and densely arranged metal section heating tube composite glass evacuated solar collector tubes |
| CN201852331U (en) * | 2009-12-23 | 2011-06-01 | 张建城 | Line-focusing solar energy intensified heat collecting pipe |
-
2011
- 2011-09-16 CN CN201110274508A patent/CN102305483A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101363664A (en) * | 2008-10-09 | 2009-02-11 | 西安交通大学 | Focussing groove type solar thermal absorber of single side multi-longitudinal whorl strengthened heat exchange |
| CN101769617A (en) * | 2008-12-31 | 2010-07-07 | 北京环能海臣科技有限公司 | Solar collector with horizontally inserted and densely arranged metal section heating tube composite glass evacuated solar collector tubes |
| CN201852331U (en) * | 2009-12-23 | 2011-06-01 | 张建城 | Line-focusing solar energy intensified heat collecting pipe |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102563930A (en) * | 2012-02-24 | 2012-07-11 | 中国西电集团公司 | High-temperature vacuum solar collector tube with outlaid expansion joint for solar power generation |
| CN102563930B (en) * | 2012-02-24 | 2013-05-15 | 中国西电集团公司 | High-temperature vacuum solar collector tube with outlaid expansion joint for solar power generation |
| CN103267377A (en) * | 2013-05-08 | 2013-08-28 | 南京溧马新能源科技有限公司 | Solar vacuum heat-collecting tube with fluid mixer |
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Application publication date: 20120104 |