CN1828171A - Single-end sealed vacuum pipe type solar energy collector with built-in metal spiral pipe drum - Google Patents
Single-end sealed vacuum pipe type solar energy collector with built-in metal spiral pipe drum Download PDFInfo
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- CN1828171A CN1828171A CNA2005100808781A CN200510080878A CN1828171A CN 1828171 A CN1828171 A CN 1828171A CN A2005100808781 A CNA2005100808781 A CN A2005100808781A CN 200510080878 A CN200510080878 A CN 200510080878A CN 1828171 A CN1828171 A CN 1828171A
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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 an external metallic screw tube single-end sealing vacuum tube solar energy collector, which comprises a glass tube, a metallic receiving tube and a sealing device. It is characterized in that: the receiving tube is the screw tube coil cylinder coiled by metallic tubes, which is through the glass tube and one end can slide freely and another end is fixed at the open of glass tube with the outlet tube of said coil cylinder via the sealing device; said sealing device is the fluorin rubber taper sealing plug matching the taper open of glass tube open, or is formed by using thermal compress sealing technique to connect the metallic ring, the flange of glass tube open and the metallic end cover of inlet and outlet tubes of coil cylinder; the coil cylinder is plated with solar light selective adsorption coat. The invention can improve the heat efficiency, to be used in parabola groove reflective light collector, while the working temperature can reach 250-280Deg. C.
Description
Technical field:
The invention belongs to technical field of solar utilization technique, particularly relate to the photothermal converter of the high density solar energy that high temperature heat source is used in being suitable for doing.
Background technology:
In the various energy, the solar energy storage is the abundantest, divides cloth cover the widest, the cleanest, and solar energy is the most reliable energy of human kind sustainable development; But solar energy density is low, and be subjected to day and night, season, geography and climatic influences, the utilization of solar energy is very restricted.At present, solar thermal utilization is general only to be used as low temperature heat energy, as utilizes the solar water heater heat hot water or utilize solar energy drying crops fruit etc., is badly in need of high-temperature solar conversion equipment in the exploitation, so that the thermal source of power or refrigeration to be provided.
The parabola groove reflecting condenser can obtain optically focused than the highdensity solar energy of middle temperature that is tens, because concentrator control realizes existing commercial examples easily.Israel-U.S. Shandong (LUZ) international corporation was now risen and is successively built up 9 slot type TRTs on the southern desert of California, USA, total capacity 354 megawatts, year generating total amount 10.8 hundred million kilowatt hours [1,2] in 1985.LUZ company adopts built-in surface to scribble the glass-vacuum tube of the metal circular tube of spectrum selective paint.Be to solve the different broken problems that easily cause metal tube and glass tube at sealed at both ends place with the coefficient of expansion of glass tube of metal tube, bellows has also been adopted at two ends, and one of bellows is connected sealing, the other end and glass end sealing [3] with metal tube.The advantage of vacuum heat absorbing pipe is there be not heat convection between metal tube and glass tube substantially; The glass tube external diameter is little and transparent, has reduced the screening shadow to sunlight; Selective coating has high-absorbility to sunshine, and is low-launch-rate on operating temperature.Its shortcoming is: the interface vacuum seal complex process of glass tube two ends and metal tube, and broken easily; Straight-through metal tube actual internal area is big, causes the Reynolds number of working fluid low, and tube wall is low to the coefficient of heat transfer of fluid; And the exposed area of single cylindrical tube is less, and it is more to cause the tube wall temperature to be higher than temperature working fluid, increases the radiation heat loss; This post cavity type heat absorber is suitable for long burnt parabolic slot-type optical collector.
In order to avoid vacuum treated technology trouble, people such as U.S. scientist David A.Boyd published the article on SolarEnergy in 1976 and propose the notion [4] of cylindric black chamber solar receiver, its structure is a cylindricality cavity, open slot places the focus place collectiong focusing light beam of parabola groove reflector, receiver vallecular cavity perisporium is furnished with endothermic tube, fluid working substance is arranged, the external covering heat-barrier material of cylinder chamber in the pipe.This post cavity type heat absorber is suitable for long burnt parabolic slot-type optical collector.The cavity type heat absorber of optimal design, performance is suitable with the vacuum tube absorber, does not have the sorrow of vacuum reduction and paint aging.People such as Chinese University of Science and Technology's Pueraria lobota neolite have proposed on this basis that pipe, wall link and have been the notion [3] of the novel cavity type absorber of cavity window with the heat mirror, have set up experimental provision.Though the performance of cylindric black chamber solar receiver is near vacuum tube receiver, the thermal insulation layer that its end face covers has lost many solar radiant energies, and it is stupid that device seems, do not adopted by reality.
List of references:
[1] Lu Weide (Liu Dazhong), Zhao Yuwen, 21 century China's solar energy utilize development strategy, 21 century China energy strategy Conference Papers collection, 1998, pp103-107
[2] the Yellow River, the progress of concentration solar generating, solar energy, 2004, the 3 phases, pp33-44
[3] CHOU Qiao Li, Ge Xinshi, solar energy thermal-power-generating technology, Nature Journal, 18 (6) 344-348,1996
[4]DavidA.B.，Ryszard，G.S.Solar?Energy，Vol.18，395-401，1976
Technology contents:
For solving the deficiency of warm vacuum tube metal straight pipe formula receiver in the solar energy, promptly different with the coefficient of expansion of glass tube because of metal tube, easily cause metal tube and glass tube broken problem at sealed at both ends place, with because of the metal straight pipe actual internal area big, cause the Reynolds number of working fluid low, the coefficient of heat transfer of tube wall and fluid is low, the present invention proposes a kind of single-end sealed electron tubes type solar receiver of built-in metal helix tube reel, can effectively overcome above-mentioned shortcoming, improve the thermal efficiency of receiver and increase security.
Technical scheme of the present invention is: a kind of single-end sealed electron tubes type solar receiver of built-in metal helix tube reel, comprise glass tube 1, the metal solar receiving tube, sealing device, glass tube is not held the end socket that adopts glass capsulation and vacuum orifice is arranged, vacuumize in the glass tube, do not hold in the pipe and place getter, as barium-titanium getter; It is characterized in that: described metal solar receiving tube is the helix tube reel 2 that is rolled into by metal tube, helix tube reel and glass tube coaxial line are placed in the glass tube, the outlet 15 of helix tube returns in the middle of the helix tube reel, and with the openend of the together all sealed device sealing and fixing of inlet tube 14 at glass tube, the other end of helix tube reel is being supported and can be free to slide in glass tube by support 4; The helix tube mandrel surface scribbles sunshine and absorbs selective coating, and working fluid is flowing in the pipe; At least one of the helix tube of formation reel;
One of described sealing device is the conical plug sealing, and the inlet tube of helix tube and outlet pass fluorubber cone seal plug 3, the bell fitted seal of the openend of cone seal plug and glass tube 1;
Two of described sealing device, it is the conical plug sealing that has port outside protection ring, the inlet tube of helix tube and outlet pass fluorubber cone seal plug 3, the bell fitted seal of the openend of cone seal plug and glass tube, the cover ports having outside, the outside protection ring of the bell of glass tube; Port outside protection ring is that the outer ring is that quoit 10 and inner ring are the complex loop of fluorubber or silicon rubber taper hole cover 5, and its taper hole cooperates with the outer wall of glass tube taper mouth; With two block pressur plates 6,9 and bolt 7 and nut 8 port outside protection ring and cone seal plug 3 are compressed, cone seal plug 3 is closely contacted with outlet with the inlet tube of glass tube taper mouth and helix tube;
Three of described sealing device is hot-press sealing sealings, and sealing device has comprised metal end 11, the terminal port flange 13 of glass tube openend, the wire rings 12 of sealing usefulness; The inlet tube 14 and the outlet 15 of helix tube pass metal end 11, and are welded on the metal end; The openend of glass tube is founded out the flange platform, places wire rings between the flange platform of metal end and glass tube, uses the hot-press sealing technology, makes the solid-state sealing-in sealing of wire rings and glass and metal end;
Sealing is a kind of in aluminium, zinc, lead, the tin with the wire rings material.
Because the metallic coil of the single-end sealed electron tubes type solar receiver of built-in metal helix tube reel of the present invention is only sealed fixing at the openend of glass tube, the other end can contract free Shen, solve metal tube and the inconsistent and stress problem of total length that glass tube is different because of the coefficient of expansion and the work temperature is not brought simultaneously, avoided the easy broken problem of glass tube; The import and export pipe of metallic coil is the bell sealing by fluorubber conical plug and glass tube openend, or by the metal end cover plate and and the flange platform of glass tube between the wire rings hot-press sealing, good sealing-in is arranged; But 250～280 ℃ of fluorubber heatproofs, the encapsulant of warm receiver in being fit to do.
Use pressing plate to clamp the Sealing Method of taper sealing-plug and port outside protection ring, promptly can produce very big side extruding force to glass taper port madial wall, increase sealing, again because the outside protection of port outside protection ring, offset radial tension, make that glass taper port is unlikely to break when sealing-plug compresses;
Use the hot-press sealing sealing of metal end and glass port flange, can improve the operating temperature of metal tube;
Because the internal diameter of helix tube is more much smaller than the diameter of helix tube reel, under the situation of solar radiation that receives same power and the same flow fluid of assurance, the helix tube inner fluid can be than obtaining high a lot of Reynolds number with the isodiametric straight tube of helix tube reel, adding the helix tube fluid is helical flow, therefore can strengthen the heat convection effect greatly; Moreover the copper pipe wall of the inner core face of helix tube reel, the same temperature on urceolus surface is almost arranged, inner core quite makes heat transfer area enlarge in the face of the heating of fluid, and radiationless loss; Above-mentioned augmentation of heat transfer effect is summed up and can be shown the temperature difference of tube-surface temperature and working fluid is reduced, thereby has reduced thermal loss, has improved the efficient of receiver.
Description of drawings:
Fig. 1 is the structural representation of a kind of embodiment of the single-end sealed electron tubes type solar receiver of a kind of built-in metal helix tube reel of the present invention, and sealing device is the conical plug sealing.
Fig. 2 is the structural representation of another embodiment of the single-end sealed electron tubes type solar receiver of a kind of built-in metal helix tube reel of the present invention, and sealing device is the conical plug sealing that has port outside protection ring.
Fig. 3 is the structural representation of another embodiment of the single-end sealed electron tubes type solar receiver of a kind of built-in metal helix tube reel of the present invention, and sealing device is the hot-press sealing sealing of metal end and glass port flange.
The specific embodiment: further specify the specific embodiment of the present invention below in conjunction with accompanying drawing.
The single-end sealed electron tubes type solar receiver of embodiment 1, a kind of built-in metal helix tube reel, sealing device are the conical plug sealings.
The axis of the helix tube reel of this receiver is to install on the focal line of parabola groove, and sealed end and free-ended support should drop on the fixed support outside the two ends of parabola groove.The parabola groove reflecting condenser follows the sun to change around focal line.When optically focused can be worked the thermal efficiency about 60% under than 25～30 situation about 250 ℃.
The single-end sealed electron tubes type solar receiver of embodiment 2, a kind of built-in metal helix tube reel, sealing device are the conical plug sealings that has the port external guard ring.
Accompanying drawing 2 is structural representations of single-end sealed electron tubes type solar receiver of a kind of built-in metal helix tube reel of the embodiment of the invention 2, it as different from Example 1, the cover ports having outside, the outside of glass tube openend bell protection ring; Port outside protection ring is that the outer ring is that quoit 10 and inner ring are the complex loop of fluorubber or silicon rubber taper hole cover 5, and its taper hole cooperates with the outer wall of glass tube taper mouth; With two block pressur plates 6,9 and bolt 7 and nut 8 port outside protection ring and cone seal plug are compressed, cone seal plug 3 is closely contacted with outlet with the inlet tube of glass tube taper mouth and helix tube; The taper hole of port outside protection ring cooperates with the outer wall of glass tube taper mouth;
Accompanying drawing 3 be the embodiment of the invention 3 structural representation, what it was different with embodiment 1,2 is that the openend of glass tube 1 is to adopt the sealing of metal end 11 through hot-press sealing; The metal end likeness in form has the cap tube of anchor ring or has the awl tube of anchor ring, advancing of metallic coil reel 2, outlet 14,15 pass and are welded on the end face of the cap tube of metal end 11 or awl tube, again the glass tube openend is founded out glass flange platform 13, the outside diameter of glass flange platform is greater than 5～10 millimeters of glass tube external diameters, about 6～10 millimeters of thickness, the equal diameters of the diameter of metal end anchor ring and glass flange flat surface cylindrical, internal diameter equates that with the internal diameter of glass tube 1 anchor ring of metal end and glass flange flat surface should be able to be fitted on fine plane; Metal end available iron nickel alloy is made, 0.6～1.0 millimeter of thickness; About 1～1.5 millimeter of wire rings 12 employing aluminium wires or zinc silk, diameter are clipped between the anchor ring and glass flange flat surface of metal end; When being preheating to glass flange, metal end and wire rings than low 50～100 ℃ of used wire rings fusing point with all-radiant furnace, adopt the pressure of machinery or pneumaticpiston tube, glass flange and metal end are compressed rapidly, wire rings is subjected to huge pressure distortion and rabbets rapidly on the anchor ring of glass flange and metal end, forms sealing thus.Metal end anchor ring outer rim also can have flange, to increase the rigidity of metal end.4 is the support of metallic coil reel among the figure.
Claims (5)
1, a kind of single-end sealed electron tubes type solar receiver of built-in metal helix tube reel comprises glass tube (1), the metal solar receiving tube, sealing device, glass tube is not held the end socket that adopts glass capsulation and vacuum orifice is arranged, and vacuumizes in the glass tube, does not hold in the pipe and places getter; It is characterized in that: described metal solar receiving tube is the helix tube reel (2) that is rolled into by metal tube, helix tube reel and glass tube coaxial line are placed in the glass tube, the outlet of helix tube (15) returns in the middle of the helix tube reel, and with the openend of the together all sealed device sealing and fixing of inlet tube (14) at glass tube, the other end of helix tube reel is being supported and can be free to slide in glass tube by support 4; The helix tube mandrel surface scribbles sunshine and absorbs selective coating, and working fluid is flowing in the pipe; At least one of the helix tube of formation reel.
2, one of right 1 described sealing device is characterized in that the conical plug sealing, and the inlet tube of helix tube and outlet pass fluorubber cone seal plug (3), the bell fitted seal of the openend of cone seal plug and glass tube (1).
3, two of right 1 described sealing device, it is characterized in that having the conical plug sealing of port outside protection ring, the inlet tube of helix tube and outlet pass fluorubber cone seal plug (3), the bell fitted seal of the openend of cone seal plug and glass tube, the cover ports having outside, the outside protection ring of the bell of glass tube; Port outside protection ring is that the outer ring is that quoit (10) and inner ring are the complex loop of fluorubber or silicon rubber taper hole cover (5), and its taper hole cooperates with the outer wall of glass tube taper mouth; With two block pressur plates (6), (9) and bolt (7) and nut (8) port outside protection ring and cone seal plug are compressed, cone seal plug (3) is closely contacted with outlet with the inlet tube of glass tube taper mouth and helix tube.
4, three of right 1 described sealing device, it is characterized in that the hot-press sealing sealing, sealing device has comprised metal end (11), the terminal port flange (13) of glass tube openend, the wire rings (12) of sealing usefulness; Inlet tube of helix tube (14) and outlet (15) pass metal end, and are welded on the metal end; The openend of glass tube is founded out flange platform (13), places wire rings (12) between the flange platform of metal end and glass tube, uses the hot-press sealing technology, makes the solid-state sealing-in sealing of wire rings and glass flange and metal end.
5, the material of right 4 described wire rings is a kind of in aluminium, zinc, lead, the tin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2005100808781A CN1828171A (en) | 2005-03-03 | 2005-06-29 | Single-end sealed vacuum pipe type solar energy collector with built-in metal spiral pipe drum |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200510037954.0 | 2005-03-03 | ||
| CN200510037954 | 2005-03-03 | ||
| CNA2005100808781A CN1828171A (en) | 2005-03-03 | 2005-06-29 | Single-end sealed vacuum pipe type solar energy collector with built-in metal spiral pipe drum |
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| Publication Number | Publication Date |
|---|---|
| CN1828171A true CN1828171A (en) | 2006-09-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2005100808781A Pending CN1828171A (en) | 2005-03-03 | 2005-06-29 | Single-end sealed vacuum pipe type solar energy collector with built-in metal spiral pipe drum |
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| CN (1) | CN1828171A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1916525B (en) * | 2006-09-08 | 2010-05-12 | 南京工业大学 | Heat pipe receiver in intermediate temperature in use for generating electricity from solar heat |
| CN101071000B (en) * | 2007-06-20 | 2011-05-18 | 冼泰来 | Solar collector |
| CN107062659A (en) * | 2017-05-12 | 2017-08-18 | 山东大学 | The solar vacuum heat-collecting pipe and vacuum heat-collecting system of a kind of spiral change |
| CN109442760A (en) * | 2018-12-14 | 2019-03-08 | 莱西市产业技术研究院 | A kind of energy-saving solar heat collector and its application method |
-
2005
- 2005-06-29 CN CNA2005100808781A patent/CN1828171A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1916525B (en) * | 2006-09-08 | 2010-05-12 | 南京工业大学 | Heat pipe receiver in intermediate temperature in use for generating electricity from solar heat |
| CN101071000B (en) * | 2007-06-20 | 2011-05-18 | 冼泰来 | Solar collector |
| CN107062659A (en) * | 2017-05-12 | 2017-08-18 | 山东大学 | The solar vacuum heat-collecting pipe and vacuum heat-collecting system of a kind of spiral change |
| CN107062659B (en) * | 2017-05-12 | 2019-01-22 | 山东大学 | A kind of solar vacuum heat-collecting pipe and vacuum heat-collecting system of spiral variation |
| CN109442760A (en) * | 2018-12-14 | 2019-03-08 | 莱西市产业技术研究院 | A kind of energy-saving solar heat collector and its application method |
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