CN102927707B - Solar heat collecting pipe - Google Patents
Solar heat collecting pipe Download PDFInfo
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- CN102927707B CN102927707B CN201210440553.XA CN201210440553A CN102927707B CN 102927707 B CN102927707 B CN 102927707B CN 201210440553 A CN201210440553 A CN 201210440553A CN 102927707 B CN102927707 B CN 102927707B
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- pipe
- inner pipe
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- outer pipe
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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
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Abstract
The invention discloses a solar heat collecting pipe. The solar heat collecting pipe comprises a metal inner pipe, a metal outer pipe, a first coupling head and a second coupling head, the metal outer pipe is sleeved on the outside of the metal inner pipe, axial seams are arranged at corresponding positions of the metal inner pipe and the metal outer pipe, a sealing edge is formed by the seam edge portion of the metal inner pipe and the corresponding seam edge position of the metal outer pipe, consequently a casing pipe body is formed, a flow channel is formed between the outer wall of the metal inner pipe and the inner wall of the metal outer pipe, an absorption cavity is formed in the inner wall of the metal inner pipe, an oxidation black layer or a black coating layer with high absorptivity is disposed on the inner wall of the metal inner pipe, transparent glass is covered on the axial seams, a first heat insulation layer and a second heat insulation layer are coated on the outside of the metal outer pipe, the edge portion of the transparent glass is inserted between the first heat insulation layer and the second heat insulation layer, and the first coupling head and the second coupling head are fixed at two ends of the casing pipe body respectively. The solar heat collecting pipe has the advantages of being simple in manufacturing, low in cost and high in heat absorption efficiency.
Description
Technical field
The present invention relates to a kind of middle high-temperature solar thermal-collecting tube, belong to high temperature in solar energy and utilize field.
Background technology
In solar energy high temperature utilization mainly by slot type focalizer, automatic solar energy tracking device, in high-temperature heat-collection pipe, application apparatus etc. form.Solar energy focuses on through slot type focalizer on the absorbing surface of thermal-collecting tube, and heating absorption face raises the temperature of absorption tube, and fluid flows in endothermic tube, absorbs the energy of endothermic tube and rising temperature, the working media utilizing as middle high temperature.
At present, in middle high-temperature heat collection system, all adopt glass-metal vacuum heat collection pipe as receiver.Its basic structure is that outer tube is glass tube, and inner tube is metal tube, and two ends adopt metal bellows, kovar alloy and flange that glass tube and metal tube are coupled together, and glass tube and metal tube adopt hot-press sealing or sealing by fusing sealing-in.Metal outer pipe outer wall utilizes the selective absorber coatings of magnetron sputtering, vacuumizes (as Fig. 6) between glass tube and metal tube.Yet, because the process for sealing of glass tube and metal tube is complicated, technical difficulty is high, the selective absorption film of magnetron sputtering stability is at high temperature difficult to control, to such an extent as to only has at present German Schott, Israel Solel, Italian ENEA San Ge producer to grasp the manufacturing process of this high-temperature vacuum heat-collecting tube.Domestic also do not have to produce the commercial product utilizing for solar energy high temperature at present.
Summary of the invention
The object of the present invention is to provide a kind of solar energy heat collection pipe that can overcome glass-metal vacuum solar heat-collecting pipe sealing technology complexity, complex structure and the even problem of the circumferential temperature distributing disproportionation of receiver endothermic tube.
The technical scheme that realizes above-mentioned purpose is: a kind of solar energy heat collection pipe, comprise metal inner pipe, metal outer pipe, the first Connecting jont and the second Connecting jont, described metal outer pipe is enclosed within outside metal inner pipe, the correspondence position of metal inner pipe and metal outer pipe all has axial slit, the seam of metal inner pipe is along locating the seam corresponding with metal outer pipe along locating to form sealing strip, make metal inner pipe and metal outer pipe become a union body, between the outer wall of described metal inner pipe and the inwall of metal outer pipe, it is runner, within the inwall of described metal inner pipe, form absorbing cavity, the black coating on the inwall of metal inner pipe with oxidation black layer or high-absorbility, in described axial slit, be coated with clear glass, described metal outer pipe is also coated with the first thermal insulation separation thermosphere and the second thermal insulation separation thermosphere outward, the limit portion of described clear glass is inserted between the first thermal insulation separation thermosphere and the second thermal insulation separation thermosphere, described the first Connecting jont and the second Connecting jont are separately fixed at the two ends of union body, described the first Connecting jont and the second Connecting jont all have liquid head piece, liquid head piece is communicated with runner.
The seam of described metal inner pipe welds together along place and forms sealing strip along locating the seam corresponding with metal outer pipe.
Oxidation black layer on the inwall of described metal inner pipe is the oxidation black layer of high-temperature process.
The black coating of the high-absorbility on the inwall of described metal inner pipe is the high temperature black coating of high-absorbility.
Described clear glass is the clear glass of low-launch-rate, high permeability.
In described runner, be provided with heat transfer fin, described heat transfer fin is located in metal inner pipe and/or metal outer pipe.
Described metal inner pipe two ends all have the first bulb, all have corresponding the second bulb on described the first Connecting jont and the second Connecting jont, form certain liquid stream gap between the first bulb and the second bulb, and liquid stream two ends, gap are communicated with respectively corresponding liquid head piece and runner.
The area of described axial slit be absorbing cavity cross-sectional area 5 ~ 20%.
The two ends of described union body are fixed with the first body coupling flange and the second body coupling flange, on the first Connecting jont and the second Connecting jont, have respectively the first coupling flange and the second coupling flange, the first coupling flange is fixedly connected with the second body coupling flange with corresponding the first body coupling flange respectively with the second coupling flange.
Described metal outer pipe is also coated with the first thermal insulation separation thermosphere and the second thermal insulation separation thermosphere outward.
Adopt after technique scheme, because the correspondence position of described metal inner pipe and metal outer pipe all has axial slit, the seam of metal inner pipe is along locating the seam corresponding with metal outer pipe along locating to form sealing strip, make metal inner pipe and metal outer pipe become a union body, therefore, cancelled sealing technology and high-temperature selective absorber coatings between the glass-metal pipe of prior art, thereby overcome that glass-metal vacuum solar heat-collecting pipe sealing technology is complicated, complex structure and the even problem of the circumferential temperature distributing disproportionation of receiver endothermic tube, again owing to being runner between the outer wall of described metal inner pipe and the inwall of metal outer pipe, within the inwall of described metal inner pipe, form absorbing cavity, the black coating on the inwall of metal inner pipe with oxidation black layer or high-absorbility, in described axial slit, be coated with clear glass, described metal outer pipe is also coated with the first thermal insulation separation thermosphere and the second thermal insulation separation thermosphere outward, the limit portion of described clear glass is inserted between the first thermal insulation separation thermosphere and the second thermal insulation separation thermosphere, therefore, during use, sunshine enters absorbing cavity through the clear glass of the axial slit from solar energy heat collection pipe, inner tubal wall by metal inner pipe absorbs solar energy and heats up, medium in runner is (as water, oil) carry out fluid interchange with metal inner pipe, metal inner pipe is passed to fluid media (medium) by the solar energy of absorption, improve the outlet temperature of medium, the black coating on the inwall in absorbing cavity with oxidation black layer or high-absorbility, thereby sunshine absorptivity is high, clear glass and the first thermal insulation separation thermosphere and the second thermal insulation separation thermosphere can effectively reduce the heat radiation to external world of absorbing cavity, have improved temperature and the heat absorption efficiency of absorbing cavity.The present invention not only manufactures simply, and cost is low, can large-scale production, and there is the advantages such as the thermal efficiency is suitable with glass-metal vacuum solar heat-collecting pipe, and working range and application scenario are wide.
Accompanying drawing explanation
The present invention is further detailed explanation for the embodiment providing below in conjunction with accompanying drawing.
Fig. 1 is the structure front view of solar energy heat collection pipe of the present invention.
Fig. 2 is the A-A cutaway view of Fig. 1;
Fig. 3 is the B-B cutaway view of Fig. 2;
Fig. 4 is the structural representation of the Connecting jont in the present invention;
Fig. 5 is metal inner pipe, metal outer pipe and the clear glass in the present invention, the assembly structure figure of thermal insulation separation thermosphere;
Fig. 6 is the structural representation of the solar energy heat collection pipe of prior art.
The specific embodiment
As shown in Figure 6, the solar energy heat collection pipe of prior art, for outer tube is glass tube, inner tube is metal tube, two ends adopt metal bellows, kovar alloy and flange that glass tube and metal tube are coupled together, and glass tube and metal tube adopt hot-press sealing or sealing by fusing sealing-in.
As Fig. 1, 2, 3, 4, shown in 5, a kind of solar energy heat collection pipe of the present invention, comprise metal inner pipe 8, metal outer pipe 7, the first Connecting jont 15 and the second Connecting jont 16, described metal outer pipe 7 is enclosed within outside metal inner pipe 8, the correspondence position of metal inner pipe 8 and metal outer pipe 7 all has axial slit 8-1, 7-1, the seam of metal inner pipe 8 is along locating the seam corresponding with metal outer pipe 7 along locating to form sealing strip 11, 12, make metal inner pipe 8 and metal outer pipe 7 become a union body, it between the inwall of the outer wall of described metal inner pipe 8 and metal outer pipe 7, is runner 13, within the inwall 18 of described metal inner pipe 8, form absorbing cavity 3, the black coating on the inwall 18 of metal inner pipe 8 with oxidation black layer or high-absorbility, described axial slit 8-1, on 7-1, be coated with clear glass 9, outer the first thermal insulation separation thermosphere 6 and the second thermal insulation separation thermosphere 5 of being also coated with of described metal outer pipe 7, the limit portion of described clear glass 9 is inserted between the first thermal insulation separation thermosphere 6 and the second thermal insulation separation thermosphere 5, described the first Connecting jont 15 and the second Connecting jont 16 are separately fixed at the two ends of union body, described the first Connecting jont 15 and the second Connecting jont 16 all have liquid head piece 15-1, 16-1, liquid head piece 15-1, 16-1 is communicated with runner 13.
As shown in Figure 2, the seam of described metal inner pipe 8 welds together along place and forms sealing strip 11,12 along locating the seam corresponding with metal outer pipe 7.The seam of described metal inner pipe 8 can be also integrally manufactured and formation sealing strip 11,12 along locating the seam corresponding with metal outer pipe 7 along locating.
Oxidation black layer on the inwall 18 of described metal inner pipe 8 is the oxidation black layer of high-temperature process.The oxidation black layer of high-temperature process generally refers to that metal is through 300 ~ 500 ℃ of heating, the oxidation black layer of Surface Creation.
The black coating of the high-absorbility on the inwall 18 of described metal inner pipe 8 is the high temperature black coating of high-absorbility.The high temperature black coating of high-absorbility generally refers to black chrome coating, or black nickel coating, or three target magnetic control sputterings are prepared aluminium-copper-ferrum quasi-crystal coating.
Described clear glass 9 is clear glasses of low-launch-rate, high permeability.
The clear glass of low-launch-rate, high permeability can adopt the LowE glass of Shanghai silicate Research Institute, this glass utilize evaporating deposition technique at glass surface deposition one deck low-emissivity coating, generally by some metals or thin layer of metal oxide and substrate, formed.
As shown in Fig. 3,5, in described runner 13, be provided with heat transfer fin 14.The fluid media (medium) of heat transfer fin 14 in can disturbance runner 13, can make fluid media (medium) carry out fluid interchange with union body preferably.
As shown in Fig. 3,5, described heat transfer fin 14 is located on metal inner pipe 8.Or described heat transfer fin 14 is located in metal outer pipe 7.Or described heat transfer fin 14 is located in metal inner pipe 8 and metal outer pipe (7).
As shown in Fig. 3,5, described metal inner pipe 8 two ends all have the first bulb 8-2,8-3, on described the first Connecting jont 15 and the second Connecting jont 16, all there is corresponding the second bulb 15-2,16-2, between the first bulb 8-2,8-3 and the second bulb 15-2,16-2, form certain liquid stream gap 19,20, liquid stream 19,20 two ends, gap are communicated with respectively corresponding liquid head piece 15-1,16-1 and runner (13).By liquid, flow gap 19,20, fluid media (medium) can uniform fold flows through the outer surface of metal inner pipe 8, further improves heat transfer effect.
As shown in Fig. 2,5, the area of described axial slit 8-1,7-1 be absorbing cavity 3 cross-sectional area 5 ~ 20%.Like this, there is higher sunshine absorptivity, can effectively absorb the solar radiation energy of incident.
As shown in Fig. 2,5, preferably, the area of described axial slit 8-1,7-1 be absorbing cavity 3 cross-sectional area 10%.
As shown in Fig. 1,2,3,4,5, the two ends of described union body are fixed with the first body coupling flange 4 and the second body coupling flange 10, on the first Connecting jont 15 and the second Connecting jont 16, have respectively the first coupling flange 15-3 and the second coupling flange 16-3, the first coupling flange 15-3 is fixedly connected with the second body coupling flange 10 with corresponding the first body coupling flange 4 respectively with the second coupling flange 16-3.
As shown in Fig. 1,2,3,5, in order to reduce heat loss, outer the first thermal insulation separation thermosphere 5 and the second thermal insulation separation thermosphere 6 of being also coated with of described metal outer pipe 7.
As shown in Fig. 1,2,3,5, during use, fluid media (medium) (Ru Shui, oil), from the liquid head piece 15-1 of described the first Connecting jont 15 liquid stream gap 19 of flowing through, enters runner 13; Simultaneously, sunshine through the axial slit 8-1 of solar energy heat collection pipe, the low-launch-rate at 7-1 place, high transparent clear glass 9 enter absorbing cavity 3, inner tubal wall 18 by metal inner pipe 8 absorbs solar energy and heats up, fluid media (medium) in runner 13 and metal inner pipe 8 carry out fluid interchange, metal inner pipe 8 is passed to fluid media (medium) by the solar energy of absorption, improves the temperature of fluid media (medium).Fluid media (medium) in runner 13 from through liquid stream gap 20, flows out from the liquid head piece 16-1 of the second Connecting jont 16 again.
Claims (7)
1. a solar energy heat collection pipe, is characterized in that:
A, comprise metal inner pipe (8), metal outer pipe (7), the first Connecting jont (15) and the second Connecting jont (16),
B, described metal outer pipe (7) are enclosed within outside metal inner pipe (8), the correspondence position of metal inner pipe (8) and metal outer pipe (7) all has axial slit (8-1,7-1), the seam of metal inner pipe (8) is along locating the seam corresponding with metal outer pipe (7) along locating to form sealing strip (11,12), make metal inner pipe (8) and metal outer pipe (7) become a union body
Between the inwall of the outer wall of c, described metal inner pipe (8) and metal outer pipe (7), be runner (13), within the inwall (18) of described metal inner pipe (8), form absorbing cavity (3), the black coating on the inwall (18) of metal inner pipe (8) with oxidation black layer or high-absorbility
In d, described axial slit (8-1,7-1), be coated with clear glass (9),
Outside e, described metal outer pipe (7), be also coated with the first thermal insulation separation thermosphere (6) and the second thermal insulation separation thermosphere (5), the limit portion of described clear glass (9) is inserted between the first thermal insulation separation thermosphere (6) and the second thermal insulation separation thermosphere (5),
F, described the first Connecting jont (15) and the second Connecting jont (16) are separately fixed at the two ends of union body,
G, described the first Connecting jont (15) and the second Connecting jont (16) all have liquid head piece (15-1,16-1), and liquid head piece (15-1,16-1) is communicated with runner (13),
H, described metal inner pipe (8) two ends all have the first bulb (8-2,8-3), on described the first Connecting jont (15) and the second Connecting jont (16), all there is corresponding the second bulb (15-2,16-2), between the first bulb (8-2,8-3) and the second bulb (15-2,16-2), form certain liquid stream gap (19,20), liquid stream two ends, gap (19,20) are communicated with respectively corresponding liquid head piece (15-1,16-1) and runner (13)
The two ends of i, described union body are fixed with the first body coupling flange (4) and the second body coupling flange (10), on the first Connecting jont (15) and the second Connecting jont (16), have respectively the first coupling flange (15-3) and the second coupling flange (16-3), the first coupling flange (15-3) is fixedly connected with the second body coupling flange (10) with corresponding the first body coupling flange (4) respectively with the second coupling flange (16-3).
2. solar energy heat collection pipe according to claim 1, is characterized in that: the seam of described metal inner pipe (8) welds together along place and forms sealing strip (11,12) along locating the seam corresponding with metal outer pipe (7).
3. solar energy heat collection pipe according to claim 1, is characterized in that: the oxidation black layer on the inwall (18) of described metal inner pipe (8) is the oxidation black layer of high-temperature process.
4. solar energy heat collection pipe according to claim 1, is characterized in that: the black coating of the high-absorbility on the inwall (18) of described metal inner pipe (8) is the high temperature black coating of high-absorbility.
5. solar energy heat collection pipe according to claim 1, is characterized in that: described clear glass (9) is the clear glass of low-launch-rate, high permeability.
6. solar energy heat collection pipe according to claim 1, is characterized in that: in described runner (13), be provided with heat transfer fin (14), described heat transfer fin (14) is located in metal inner pipe (8) and/or metal outer pipe (7).
7. solar energy heat collection pipe according to claim 1, is characterized in that: the area of described axial slit (8-1,7-1) be absorbing cavity (3) cross-sectional area 5 ~ 20%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210440553.XA CN102927707B (en) | 2012-11-07 | 2012-11-07 | Solar heat collecting pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210440553.XA CN102927707B (en) | 2012-11-07 | 2012-11-07 | Solar heat collecting pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102927707A CN102927707A (en) | 2013-02-13 |
| CN102927707B true CN102927707B (en) | 2014-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210440553.XA Expired - Fee Related CN102927707B (en) | 2012-11-07 | 2012-11-07 | Solar heat collecting pipe |
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2375006B1 (en) * | 2008-10-14 | 2013-01-24 | Iberdrola Ingeniería Y Construcción, S.A.U. | PERFECTED SOLAR RECEIVER FOR CYLINDER-PARABOLIC COLLECTORS. |
| CN101982711B (en) * | 2010-09-30 | 2012-03-21 | 北京印刷学院 | Condensing multiplication and closed spherical lighting solar water heating and power generating device |
| CN101982709B (en) * | 2010-09-30 | 2012-02-29 | 北京印刷学院 | Rotary paraboloid light condensing cylindrical bucket-shaped closed cavity lighting solar hot water generating device |
| CN101968277B (en) * | 2010-10-25 | 2012-02-15 | 北京印刷学院 | Solar water heater based on parabolic cylinder concentrated cylindrical surface closed cavity lighting |
| CN101975460B (en) * | 2010-10-25 | 2012-02-15 | 北京印刷学院 | Solar heater with secondary reflection parabolic cylinder surface for gathering light and hollow square closed cavity for daylighting |
| CN202885319U (en) * | 2012-11-07 | 2013-04-17 | 江苏尚森太阳能科技发展有限公司 | Solar energy heat collecting tube |
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2012
- 2012-11-07 CN CN201210440553.XA patent/CN102927707B/en not_active Expired - Fee Related
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| CN102927707A (en) | 2013-02-13 |
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Granted publication date: 20140402 Termination date: 20181107 |