CN101702410B - Double inclined plane reflecting condensation solar photovoltaic battery module - Google Patents
Double inclined plane reflecting condensation solar photovoltaic battery module Download PDFInfo
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- CN101702410B CN101702410B CN200910174969XA CN200910174969A CN101702410B CN 101702410 B CN101702410 B CN 101702410B CN 200910174969X A CN200910174969X A CN 200910174969XA CN 200910174969 A CN200910174969 A CN 200910174969A CN 101702410 B CN101702410 B CN 101702410B
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- 230000015572 biosynthetic process Effects 0.000 claims description 9
- 238000005755 formation reaction Methods 0.000 claims description 8
- 230000005611 electricity Effects 0.000 claims description 5
- 229910001218 Gallium arsenide Inorganic materials 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 208000034189 Sclerosis Diseases 0.000 claims description 2
- 230000001154 acute effect Effects 0.000 claims description 2
- 230000003287 optical effect Effects 0.000 claims description 2
- 239000005341 toughened glass Substances 0.000 claims description 2
- 230000005855 radiation Effects 0.000 abstract description 14
- 238000006243 chemical reaction Methods 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 4
- 230000005622 photoelectricity Effects 0.000 abstract 1
- 210000004027 cell Anatomy 0.000 description 82
- 238000000034 method Methods 0.000 description 7
- 241001424688 Enceliopsis Species 0.000 description 6
- 238000005538 encapsulation Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000010248 power generation Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 239000002210 silicon-based material Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- PCTMTFRHKVHKIS-BMFZQQSSSA-N (1s,3r,4e,6e,8e,10e,12e,14e,16e,18s,19r,20r,21s,25r,27r,30r,31r,33s,35r,37s,38r)-3-[(2r,3s,4s,5s,6r)-4-amino-3,5-dihydroxy-6-methyloxan-2-yl]oxy-19,25,27,30,31,33,35,37-octahydroxy-18,20,21-trimethyl-23-oxo-22,39-dioxabicyclo[33.3.1]nonatriaconta-4,6,8,10 Chemical compound C1C=C2C[C@@H](OS(O)(=O)=O)CC[C@]2(C)[C@@H]2[C@@H]1[C@@H]1CC[C@H]([C@H](C)CCCC(C)C)[C@@]1(C)CC2.O[C@H]1[C@@H](N)[C@H](O)[C@@H](C)O[C@H]1O[C@H]1/C=C/C=C/C=C/C=C/C=C/C=C/C=C/[C@H](C)[C@@H](O)[C@@H](C)[C@H](C)OC(=O)C[C@H](O)C[C@H](O)CC[C@@H](O)[C@H](O)C[C@H](O)C[C@](O)(C[C@H](O)[C@H]2C(O)=O)O[C@H]2C1 PCTMTFRHKVHKIS-BMFZQQSSSA-N 0.000 description 1
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
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- 229910052733 gallium Inorganic materials 0.000 description 1
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- 229910052738 indium Inorganic materials 0.000 description 1
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
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- 238000000746 purification Methods 0.000 description 1
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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
- Y02E10/50—Photovoltaic [PV] energy
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- Photovoltaic Devices (AREA)
Abstract
The invention discloses a double inclined plane reflecting condensation solar photovoltaic battery module which is composed of a framework, a transparent protective cover board, a reflecting support body, photovoltaic batteries, an electric conduction line and a radiator base plate; more than one groups of reflecting surfaces are arranged on the reflecting support body, and the bottom part of each reflecting surface corresponds to one photovoltaic battery; the reflecting surface is composed of two trapezoids which are arranged symmetrically, and the short bottom sides of the two trapezoids form a rectangle where the photovoltaic batteries are arranged, and the long bottom sides of the two trapezoids form a rectangle which is a sunlight incidence window. Under a tracking condition, light rays reflected by the reflecting surfaces can be covered to each point of the photovoltaic batteries all year round. The surface of each photovoltaic battery can receive solar direction radiation and superposition radiation formed by reflection of the reflecting surface, so as to form light condensation effect on the photovoltaic battery, improve photoelectricity conversion efficiency of unit area, achieve the purpose of using less photovoltaic batteries under a given power condition and reduce the total cost of the photovoltaic power-generating system.
Description
Technical field
The present invention relates to a kind of structure of concentration photovoltaic system photoelectric conversion module, belong to technical field of solar utilization technique, particularly a kind of double inclined plane reflecting condensation solar photovoltaic battery module.
Background technology
Tap a new source of energy and renewable and clean energy resource be the common issue that the whole world faces, new energy development with utilize in the mode, photovoltaic generation attracts tremendous attention.At present, photovoltaic generation mainly adopts the ordinary flat photovoltaic generating system.The ordinary flat photovoltaic generating system is directly placed (angled with ground) with dull and stereotyped solar module towards low latitudes, reaches the purpose of using solar power generation thereby form the solar energy photovoltaic array in series-parallel mode.In the ordinary flat photovoltaic generating system, the cost of solar cell accounts for significant proportion in the system synthesis basis, because the price comparison of solar cell is high, thereby has directly caused the cost of system too high.At present, the conversion efficiency of the photovoltaic cell of use is low, cost is high, is the not one of the main reasons of wide popularization and application on market of photovoltaic generation.
Photovoltaic cell can be worked under quite high light intensity condition, uses photovoltaic cell to carry out opto-electronic conversion under the optically focused condition, is one of effective way that reduces cost for solar power generation.Adopt concentration photovoltaic system, can reduce the required cell area of given power, partly replace expensive solar cell with comparatively cheap concentrator.In this system, the total cost of solar cell can significantly reduce, and the total cost of electricity generation system also descends thereupon.
If concentrator cell is worked under the sun light intensity condition of 300 times or higher multiple, and can reach quite high photoelectric conversion efficiency (25%-36%).But, the photovoltaic cell of this high power concentrator needs expensive semi-conducting material (indium gallium or purification high purity silicon etc.), and processing technology is also very complicated, when using under the optically focused condition, it is very high that the temperature of photovoltaic cell can become, and needs cooling technology harsher and that efficient is very high.Especially under the silicon materials photovoltaic cell, constant situation that photovoltaic battery temperature raises in, can cause open circuit voltage to reduce at intensity of sunshine, reduced rate is-0.4%/K～-0.5%/K, thus the power output of silicon materials photovoltaic cell is also reduced.Cooling device can significantly increase the cost of photovoltaic generating system, is difficult to promote the use of on market.If concentrator cell is worked, also can effectively save a large amount of solar cells under the sun light intensity condition below 10 times.In the temperature that solar cell produces, can carry out efficiently radiates heat by the mode of using conventional fin.Therefore, this concentrator cell has certain advantage aspect the reduction cost of electricity-generating.
Transmission optically focused also is an approach that realizes higher multiple, and it also is very noticeable reducing the cost that gets off owing to a large amount of productions of Fresnel Lenses.Yet from the angle of technology, the uniformity of the optically focused light intensity of Fresnel Lenses on certain surface is less better relatively.From industrialized viewpoint of measures, than bounce technique, the cost of special lens still is higher than the cost with high reflectivity mirror face.
Summary of the invention
The object of the present invention is to provide a kind of double inclined plane reflecting condensation solar photovoltaic battery module, each point has more uniform radiation intensity on the photovoltaic cell surface, helps improving the whole photoelectric conversion efficiency of photovoltaic cell, is applicable to the one-dimensional inclined shaft tracking application.
The object of the present invention is achieved like this:
A kind of double inclined plane reflecting condensation solar photovoltaic battery module, form by framework, transparent protective cover plate, reflection stake body, photovoltaic cell, conductive connecting line, radiator base plate, glued membrane, photovoltaic cell conducts electricity connection by corresponding conductive connecting line, be packed on the radiator base plate by glued membrane, the flat photovoltaic cell under sun light intensity of photovoltaic cell for using comprises silion cell, GaAs battery and other flat photovoltaic cell;
Be provided with one group of above reflecting surface on the described reflection stake body, every group of reflecting surface is made up of two faces, is shaped as trapezoidally, big or small identical, is symmetrical arranged; The rectangle of two trapezoidal short base formations is photovoltaic cell positions, and the rectangle of two trapezoidal long base formations is sunlight incidence windows;
It is characterized in that: the relation between the acute angles beta between trapezoidal high p, reflecting surface and the photovoltaic cell of the width w of described photovoltaic cell, reflecting surface is as follows:
A kind of double inclined plane reflecting condensation solar photovoltaic battery module be made up of framework, transparent protective cover plate, reflection stake body, photovoltaic cell, conductive connecting line, radiator base plate, and encapsulation fixedly becomes an electrification component.Photovoltaic cell comprises silion cell, GaAs battery and other flat photovoltaic cell for using the flat photovoltaic cell under sun light intensity.
Photovoltaic cell conducts electricity connection by corresponding conductive connecting line, is packed on the radiator base plate by glued membrane, insulate by glued membrane between photovoltaic cell, conductive connecting line and the radiator base plate.The glued membrane kind comprises PVB or EVA, and the mode of installing comprises methods such as lamination.Install one group of above photovoltaic cell on the radiator base plate, and together constitute electric energy output device with conductive connecting line.One group of above reflecting surface is set on the reflection stake body, each corresponding photovoltaic cell in reflecting surface bottom, reflection stake body top opening part installs covering by transparent protective cover plate.Heat owing to optically focused produces photovoltaic cell dispels the heat by radiator base plate, guarantees photovoltaic cell operate as normal under suitable temperature conditions.By framework transparent protective cover plate, reflection stake body, photovoltaic cell, radiator base plate encapsulation are fixed together, constitute an electrification component.
One group of reflecting surface is made up of two faces, is shaped as trapezoidally, and size is identical and be symmetrical arranged.The rectangle of two trapezoidal short base formations is the photovoltaic cell position, and the rectangle of two trapezoidal long base formations is the sunlight incidence window.The area of sunlight incidence window is greater than the area at photovoltaic cell place.Angle between two planes that the corresponding hypotenuse of two trapezoidal faces in the reflecting surface constitutes is 〉=46.90 °.Following the tracks of under the situation, when the angle of incident ray and equatorial plane during less than 23.45 °, the light by reflecting surface reflects can all cover every bit on the photovoltaic cell.Each photovoltaic cell surface both can receive the direct radiation of the sun, can receive the stack radiation that is reflected to form by reflecting surface again, thereby had formed the spotlight effect on photovoltaic cell.At the every bit on the surface of photovoltaic cell, the stack radiation that is formed by direct solar radiation and twice reflected radiation is uniform.Sun incidence window area is greater than the area of photovoltaic cell, thereby improved the photoelectric conversion efficiency of the common photovoltaic cell of unit are, reach under given power condition, use the purpose of less photovoltaic cell, thereby can reduce the total cost of photovoltaic generating system.Because the formed light concentrating times of this concentration structure is lower, in following the tracks of power generation process, can not accumulate higher temperature on the photovoltaic cell, therefore, the photovoltaic cell back side can adopt common radiator base plate as the back substrate.Because the present invention sent out in the electric process in tracking, rotate to be parallel to the earth's axis mode all the time, promptly so-called inclined shaft tracking, just one dimension is followed the tracks of, and is lower with respect to the cost of two-dimensional tracking.
Description of drawings
Fig. 1 is a warp cross-sectional view of the present invention;
Fig. 2 is that reflecting surface solid geometry of the present invention concerns schematic diagram;
Fig. 3 is a reflecting surface geometrical relationship schematic diagram of the present invention;
Fig. 4 is a surface structure schematic diagram of the present invention.
Number in the figure is described as follows:
The transparent protective cover plate of 1-, 2-reflection stake body, 3-glued membrane, 4-photovoltaic cell, 5-conductive connecting line, 6-radiator base plate, 7-framework, 11-reflecting surface.
Embodiment
As shown in Figure 1, photovoltaic cell 4 conducts electricity connection by corresponding conductive connecting line 5, be packed on the radiator base plate 6 by glued membrane 3, between photovoltaic cell 4, conductive connecting line 5 and the radiator base plate 6 by glued membrane 3 insulation.Can install one group of above photovoltaic cell 4 on the radiator base plate 6, and together constitute electric energy output device with conductive connecting line 5.One group of above reflecting surface 11 is set on the reflection stake body 2, the corresponding photovoltaic cell 4 in each reflecting surface 11 bottom, reflection stake body 2 top opening parts install covering by transparent protective cover plate 1, the sclerosis of transparent protective cover plate 1 usefulness high transmission rate or toughened glass manufacturing, perhaps make with optical plastic, requirement has waterproof and dustproof and suitable impact resistance function, to adapt to various outdoor harsh weather.Heat owing to optically focused produces photovoltaic cell 4 dispels the heat by radiator base plate 6, thereby guarantees photovoltaic cell operate as normal under suitable temperature conditions.By framework 7 transparent protective cover plate 1, reflection stake body 2, photovoltaic cell 4, radiator base plate 6 encapsulation are fixed together, constitute an electrification component.
As shown in Figure 2, when the present invention places on ground level, make the z axle parallel with earth's axis, and make sunray be positioned at the yz plane all the time with tracking, then the xy plane is parallel with earth equatorial plane.According to astronomic knowledge as can be known, when the sun was under the line in the plane, sunray was parallel with the y axle, and the angle between the sunray of all the other times and the xy plane is between ± 23.45 °.Reflecting surface 11 is made up of two trapezoidal ABCD and A ' B ' C ' D ' face, and two trapezoidal facing with respect to yz in the coordinate claim to be provided with, and each trapezoidal facing with respect to xy separately claims, so two trapezoidal sizes are identical.Rectangle ABB ' the A ' of two trapezoidal short base formations is photovoltaic cell 4 positions, and the rectangle DCC ' D ' of two trapezoidal long base formations is the sunlight incidence window.The area of sunlight incidence window DCC ' D ' is greater than ABB ' A ' area at photovoltaic cell 4 places.
As shown in Figures 2 and 3, following the tracks of under the situation, when the sun was positioned at equatorial plane, sunray and xy plane parallel, and vertical with the x axle were just with the Surface Vertical of photovoltaic cell 4.In this case, enter the light of sunray incidence window, part direct irradiation is in the scope of w at the width between GG ' on the photovoltaic cell 4, a part is radiated on the reflecting surface 11 and is radiated on the photovoltaic cell 4 after reflection again, thereby has formed spotlight effect on photovoltaic cell 4.Wherein, when light ray propagation to being positioned at 1 H in outer of reflecting surface 11 or H ' time, be radiated at respectively through reflection on the G ' or G point of outer of photovoltaic cell 4.When light LM when being positioned on the reflecting surface 11 any point M, be radiated at after reflection on the N point corresponding on the photovoltaic cell 4.According to the reflection of light rule, incident ray LM and reflection ray MN respectively with reflecting surface HG between angle α equate.P is the trapezoidal height in reflecting surface 11 places, and β is the angle between reflecting surface 11 and the x axle, just and the angle between the xz horizontal plane, also be and photovoltaic cell 4 surfaces between angle, according to geometric knowledge, following relation should be arranged:
As shown in Figure 2, the area of sunlight incidence window DCC ' D ' is greater than ABB ' A ' area at photovoltaic cell 4 places.Wherein, two plane ADD ' A ' that the corresponding hypotenuse of two trapezoidal faces in the reflecting surface 11 constitutes and BCC ' B ' are respectively and the angle theta between the xy plane 〉=23.45 °, angle between two plane ADD ' A ' and the BCC ' B ' is 〉=46.90 °, just with angle theta 〉=23.45 on the earth parallel circle plane at xy place °.Therefore following the tracks of under the situation, when the sun was not under the line in the plane, sunray was positioned at the direct width of cloth that the photovoltaic cell 4 in ABB ' A ' zone can both receive the sun in the whole year and penetrates still in the yz plane.
As shown in Figure 2, following the tracks of under the situation, when arbitrary bundle and xy plane light L ' M in a certain angle is radiated on the reflecting surface 11 the M point, through reflected illumination on the photovoltaic cell 4 N '; Angle is zero light LM when being radiated on the reflecting surface 11 the M point between that order through M and the xy plane, through reflected illumination on N point on the photovoltaic cell 4.Can prove that by reflection of light rule and geometric knowledge N ' N line segment is parallel with the z axle, that is to say, following the tracks of under the situation, when the angle of incident ray and equatorial plane during less than 23.45 °, the light by reflecting surface 11 reflections can all cover every bit on the photovoltaic cell 4.Each photovoltaic cell 4 surface both can receive the direct radiation of the sun, can receive the stack radiation that is reflected to form by reflecting surface 11 again, thereby had formed the spotlight effect on photovoltaic cell 4.At the every bit on the surface of photovoltaic cell 4, the stack radiation that is formed by direct solar radiation and twice reflected radiation is uniform.Because sun incidence window area is greater than the area of photovoltaic cell 4, thereby improved the photoelectric conversion efficiency of the common photovoltaic cell of unit are, reach under given power condition, use the purpose of less photovoltaic cell, thereby can reduce the total cost of photovoltaic generating system.Because the formed light concentrating times of this concentration structure is lower, in following the tracks of power generation process, can not accumulate higher temperature on the photovoltaic cell 4, therefore, common radiator base plate 6 can be adopted in photovoltaic cell 4 back sides, as aluminium sheet etc. as the back substrate.By the natural heat dissipation of radiator base plate 6, reach the purpose of heat radiation.Because the present invention sent out in the electric process in tracking, rotate to be parallel to the earth's axis mode all the time, promptly so-called inclined shaft tracking, just one dimension is followed the tracks of, and is lower with respect to the cost of two-dimensional tracking.
As shown in Figure 1 and Figure 4, by the Blast Furnace Top Gas Recovery Turbine Unit (TRT) of framework 7 encapsulation, can see through transparent protective cover plate 1 and observe inner reflection stake body 2, photovoltaic cell 4, and be arranged on the reflecting surface 11 on the reflection stake body 2.Reflecting surface 11 compact arrangement are on reflection stake body 2.
Claims (4)
1. double inclined plane reflecting condensation solar photovoltaic battery module, form by framework (7), transparent protective cover plate (1), reflection stake body (2), photovoltaic cell (4), conductive connecting line (5), radiator base plate (6), glued membrane (3), photovoltaic cell (4) conducts electricity connection by corresponding conductive connecting line (5), be packed on the radiator base plate by glued membrane (3), photovoltaic cell comprises silion cell, GaAs battery and other flat photovoltaic cell for using the flat photovoltaic cell under sun light intensity;
Be provided with one group of above reflecting surface (11) on the described reflection stake body (2), every group of reflecting surface (11) is made up of two faces, is shaped as trapezoidally, big or small identical, is symmetrical arranged; The rectangle of two trapezoidal short base formations is photovoltaic cell (4) positions, and the rectangle of two trapezoidal long base formations is sunlight incidence windows;
It is characterized in that: the relation between the acute angles beta between the trapezoidal high p of the width w of described photovoltaic cell (4), reflecting surface, reflecting surface (11) and the photovoltaic cell (4) is as follows:
2. a kind of double inclined plane reflecting condensation solar photovoltaic battery module according to claim 1 is characterized in that: angle 〉=46.90 between two planes that the corresponding hypotenuse of two trapezoidal faces in the reflecting surface (11) constitutes °.
3. a kind of double inclined plane reflecting condensation solar photovoltaic battery module according to claim 1 is characterized in that: reflection stake body (2) is provided with one group of above reflecting surface (11), and what reflecting surface (11) was compact is arranged on the reflection stake body (2).
4. a kind of double inclined plane reflecting condensation solar photovoltaic battery module according to claim 1, it is characterized in that: reflection stake body (2) top installs covering by transparent protective cover plate (1), transparent protective cover plate (1) is perhaps made with optical plastic with the sclerosis or the toughened glass manufacturing of high transmission rate.
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| CN200910174969XA CN101702410B (en) | 2009-10-25 | 2009-10-25 | Double inclined plane reflecting condensation solar photovoltaic battery module |
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| CN101702410B true CN101702410B (en) | 2011-12-07 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102737847A (en) * | 2011-04-11 | 2012-10-17 | 中国科学院物理研究所 | Light collecting device for a sensitized solar battery |
| CN104539231A (en) * | 2014-12-31 | 2015-04-22 | 深圳市昂特尔太阳能投资有限公司 | Efficient portable light condensing solar power generation device |
| CN107634111A (en) * | 2016-07-15 | 2018-01-26 | 新日光能源科技股份有限公司 | Solar cell |
| CN111081801B (en) * | 2019-11-28 | 2022-04-19 | 湖北工业大学 | Lighting and power generation integrated glass with adjustable radiation transmittance |
| CN111074850A (en) * | 2020-01-02 | 2020-04-28 | 天津城建大学 | Anti-icing device and method for yacht wharf in low-temperature environment |
| CN115208306A (en) * | 2022-07-25 | 2022-10-18 | 国核自仪系统工程有限公司 | Photovoltaic electric heating panel and photovoltaic electric heating building integrated system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101373797A (en) * | 2008-09-08 | 2009-02-25 | 集美大学 | High-efficiency photovoltaic electrification condenser |
| CN101436620A (en) * | 2008-12-22 | 2009-05-20 | 东南大学 | Double U-shaped secondary reflection concentration solar cell assembly |
| CN201252109Y (en) * | 2008-08-22 | 2009-06-03 | 刘志勇 | Effective solar energy omnidirectional concentrator cell component |
| CN101478008A (en) * | 2009-01-21 | 2009-07-08 | 张德胜 | Quasi-blackbody absorbent high-efficient concentration solar cell assembly |
| CN201315553Y (en) * | 2008-12-17 | 2009-09-23 | 中国科学院西安光学精密机械研究所 | One-dimensional line-focusing concentrating photovoltaic generating set |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201252109Y (en) * | 2008-08-22 | 2009-06-03 | 刘志勇 | Effective solar energy omnidirectional concentrator cell component |
| CN101373797A (en) * | 2008-09-08 | 2009-02-25 | 集美大学 | High-efficiency photovoltaic electrification condenser |
| CN201315553Y (en) * | 2008-12-17 | 2009-09-23 | 中国科学院西安光学精密机械研究所 | One-dimensional line-focusing concentrating photovoltaic generating set |
| CN101436620A (en) * | 2008-12-22 | 2009-05-20 | 东南大学 | Double U-shaped secondary reflection concentration solar cell assembly |
| CN101478008A (en) * | 2009-01-21 | 2009-07-08 | 张德胜 | Quasi-blackbody absorbent high-efficient concentration solar cell assembly |
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| CN101702410A (en) | 2010-05-05 |
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