CN101345502A - Photovoltaic power generation system of fluorescent optical fiber solar battery - Google Patents
Photovoltaic power generation system of fluorescent optical fiber solar battery Download PDFInfo
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- CN101345502A CN101345502A CNA200810195726XA CN200810195726A CN101345502A CN 101345502 A CN101345502 A CN 101345502A CN A200810195726X A CNA200810195726X A CN A200810195726XA CN 200810195726 A CN200810195726 A CN 200810195726A CN 101345502 A CN101345502 A CN 101345502A
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- optical fiber
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E10/50—Photovoltaic [PV] energy
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Abstract
The invention relates to a photovoltaic generation system using a fluorescence optical fiber and a solar cell solving the problem of high cost of the solar photovoltaic generation. The photovoltaic generation system comprises a fluorescence optical fiber and a solar cell; the two ends of the fluorescence optical fiber are connected with the solar cell through a transparent adhesive tape to form a coupling circuit; for the crystalline silicon solar cell, the wavelength of the fluorescence optical fiber is less than 1100nm; for the gallium arsenide solar cell, the wavelength of the fluorescence optical fiber is less than 840nm; for the GaInP solar cell, the wavelength of the fluorescence optical fiber is less than 650nm. The optical fiber can be closely packed into a plane or the optical fiber is braided into fabrics or with other fibers. The photovoltaic generation system is characterized in that the illumination at the side of the fluorescence optical fiber is concentrated onto a little section of the fluorescence optical fiber by the fluorescence conversion combining with the optical fiber transmission, thereby realizing that a section size of solar cell receives side face size of sunlight while achieving a great equivalent light concentration effect. The amount of the solar cell is greatly reduced according to the invention, that is, the cost of the solar cell photovoltaic generation is greatly reduced.
Description
Technical field
The present invention relates to the photovoltaic generating system that a kind of optical fiber that utilizes fluorescent material to make is caught sunlight and converted thereof into fluorescence input solar cell.
Background technology
Along with the fast development of global economy, the consumption sharp increase of the energy.The flood tide of fossil fuel uses and has not only caused the day by day exhausted of non-renewable resources such as oil, coal, natural gas, threaten the energy security of human society, and the discharging of great amount of carbon dioxide has also caused serious day by day social environment problem.Therefore, the development and use of various regenerative resources are subjected to increasing attention.
In various regenerative resources, characteristics such as solar energy is inexhaustible, nexhaustible, pollution-free with it, facility become the object of giving priority to.
The scheme of utilizing of solar energy mainly comprises photo-thermal and photovoltaic two big classes, wherein succinct, long-life of photovoltaic generation, system efficient with it, maintenance is simple and enjoy favor, becomes the mainstream technology that solar energy utilizes.
The core parts of photovoltaic generation are solar cells.Solar cell can be divided into inorganic, organic, compound (fuel sensitization) by the kind of material; Can be divided into body material, film, lamination by structure; And can be divided into monocrystalline, polycrystalline and amorphous by the form of material.In the solar cell of numerous kinds, the most ripe with the technology of monocrystalline silicon and polysilicon (being collectively referred to as crystalline silicon), market share maximum (～90%) is a main flow in the market.
The maximum bottleneck of solar cell large-scale application is a price.At present the price of Si solar cell is about 3.5$/Wp, and life-cycle cost of electricity-generating～0.15$/kWh is about 10 times of thermal power generation, is difficult to popularize.Therefore, raising the efficiency, reducing cost is the research emphasis of solar cell.
People have attempted many approach and have improved the efficient of solar cell, the cost of reduction solar cell, but all fail to solve well this to contradiction.For example: the efficient of compound solar cell, lamination solar cell is than crystal silicon solar height, but cost is also high; And the concentrating solar battery that utilizes optical focus can reduce the consumption of solar cell significantly, but the decrease in efficiency that heating causes, the cost of cooling system and tracking system rises and has offset the minimizing of solar cell consumption again.
Summary of the invention
The objective of the invention is to construct a kind of photovoltaic generating system of fluorescent optical fiber solar battery, to reduce the cost of solar energy power generating by the combining of fluorescence optical fiber and solar cell.
Photovoltaic power generation system of fluorescent optical fiber solar battery comprises fluorescence optical fiber and solar cell;
The two ends of fluorescence optical fiber are being connected solar cell formation coupling optical path by transparent adhesive tape.
One end of described fluorescence optical fiber connects solar cell by transparent adhesive tape, and the other end is provided with the reflection end cap.Described reflection end cover material is an aluminium, or silver, or gold.
The outer surface of described fluorescence optical fiber is provided with selective reflecting layer.Described selective reflecting layer material is a photonic crystal, or the high anti-coating of optics.
Described fluorescence optical fiber more than two is arranged in a plane.
The above fluorescence optical fiber of the described six roots of sensation can be woven into braid.Described braid is a clothing, or tent.
Fluorescence optical fiber absorbs the radiation of a certain wavelength (or wave band), sends another wavelength (or wave band) radiation.Be subjected to the restriction of optical fiber, satisfy the fluorescence of certain condition, can in optical fiber, propagate very long distance by the length direction along optical fiber.Fluorescence optical fiber of the present invention is meant and can absorbs sunlight, sending solar cell can absorbing wavelength fluorescence (to crystal silicon solar energy battery, wavelength＜1100nm; For gallium arsenide solar cell, wavelength＜840nm; For phosphorus gallium indium solar cell, wavelength＜650nm etc.) optical fiber.
Structure of the present invention as shown in Figure 1.Fluorescence optical fiber 1 among Fig. 1, the fluorescence centre in the fluorescence optical fiber or be dispersed in fluorescent material particle 2 in the fluorescence optical fiber, solar cell 3; Its operation principle is: absorbed by fluorescence optical fiber when sunlight 4 is radiated on the fluorescence optical fiber 1, inspire fluorescence in fluorescence optical fiber.The fluorescence that is produced evenly distributes on all directions.When the direction of described fluorescence is in the angle of total reflection that is determined by the fluorescence optical fiber medium refraction index, described fluorescence will be in fluorescence optical fiber inwall generation total reflection, fluorescence optical fiber turns back, described like this fluorescence passes through the two ends to fluorescence optical fiber in fluorescence optical fiber of total reflection one by one and propagates, until end face outgoing from fluorescence optical fiber, be coupled into solar cell 3, be converted to electric energy output.
Be of a size of d if the length of fluorescence optical fiber is l, cross section, the quantum efficiency of fluorescence is η, and the ratio that the fluorescence that satisfies total reflection condition accounts for whole fluorescence is α, and the luminous flux that then enters solar cell is:
I＝I
0ld·αη
I wherein
0Be intensity of sunlight, ld is the side light-receiving area of fluorescence optical fiber.Compare with sunlight direct irradiation solar cell, light intensity has increased:
Doubly.D wherein
2Be the area that the cross section of fluorescence optical fiber occupies, the factor 2 expression fluorescence optical fibers in the denominator have two outgoing end faces.
This shows, characteristics of the present invention are the illumination with the fluorescence optical fiber side,, focus on the very little cross section of fluorescence optical fiber in conjunction with Optical Fiber Transmission by the fluorescence conversion, thereby realize accepting the sunlight illumination of side size, reach very big equivalent spotlight effect with the solar cell of cross-sectional sizes.Because the cost of fluorescence optical fiber is far below solar cell, the present invention has greatly reduced the consumption of solar cell, has also just greatly reduced the cost of solar energy power generating.
Optical concentration with routine is compared, the present invention need not tracking system, also can not produce serious thermal effect, because what enter solar cell is useful fluorescence, the infrared radiation that only produces thermal effect in the sunlight can only shine on the fluorescence optical fiber, and can not enter solar cell.
In order further to reduce the consumption of solar cell, also can reflection end cap rock 5 be set at an end of fluorescence optical fiber, the reflection end cover material can be aluminium, silver, gold etc., as shown in Figure 2.Described reflection end cap rock 5 allows the light that arrives this end reflect back, and is coupled into solar cell from the other end.
In order to increase the ratio (also promptly increasing α) that transmission fluorescence accounts for whole fluorescence, the selective reflecting layer 6 at wavelength of fluorescence also can be set, as shown in Figure 3 on the surface of optical fiber.Selective reflecting layer is the high anti-coating of photonic crystal or optics.Photonic crystal is a kind of material that is formed by the material periodic arrangement of two kinds of different refractivities.Photonic crystal has different reflectivity and transmissivity to the light of different wave length, and this wavelength dependence can be by shape, the refractive index of two kinds of materials of photonic crystal, and the size in arrangement cycle etc. is adjusted.Photonic crystal among the present invention is selected at optical fiber institute emitted fluorescence wavelength specially, and reflected fluorescent light sees through sunlight.Described photonic crystal also can be provided with periodically at optical fiber surface, and convex-concave realizes.At this moment, air and fluorescence optical fiber have constituted the material of two kinds of different refractivities of photonic crystal.And optical coating is a mature technique, is widely used in the optical elements such as anti-reflection and interferometric filter on camera lens surface.Wherein high anti-plated film is made of the high and low refractive index material layer of alternating deposit, and the thickness of each coating is 1/4th of institute's reverberation wavelength.The high anti-coating of optics of the present invention is specially at fluorescence optical fiber institute emitted fluorescence wavelength, and reflected fluorescent light sees through sunlight.
In actual the use, the optical fiber solid matter can be become a plane to use, an end all is provided with the reflection end cap, and the other end forms fiber bundle, with a solar cell coupling, as shown in Figure 4.
Utilize the characteristics of optical fiber flexible, optical fiber can also be woven, or get up to use, as shown in Figure 5 with other fibrage.Such fabric can be made clothing, tent etc., realizes mobile portable power generation.
Description of drawings
Fig. 1 is a structural representation of the present invention,
Fig. 2 is provided with reflection end cap structural representation for fluorescence optical fiber one end,
Fig. 3 is provided with the selective reflecting layer structural representation for the fluorescence optical fiber outer surface,
Fig. 4 is a solid matter fluorescence optical fiber structural representation of the present invention,
Fig. 5 is that the present invention weaves the fluorescence optical fiber structural representation.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further described by embodiment.
Embodiment 1:
Referring to Fig. 1.The rare earth of 5wt% is total to luminous organic coordination compound 2 (Eu
0.05, Tb
0.1) (DBM)
3Phen (rare earth dibenzoyl methane phenanthroline complex) mixes polymethyl methacrylate (PMMA) matrix, makes the polymer fluorescent optical fiber 1 of diameter 10mm, long 1m, the numerical aperture 0.6 of fluorescence optical fiber 1 (also promptly 60% fluorescence enters transmission mode).UV-6200 ultra-violet curing glue with Shenzhen letter meaning glue industry Co., Ltd is bonding with the two ends and the gallium arsenide solar cell 3 of this optical fiber.This optical fiber absorbs the sunlight (account for global solar radiation 25%) of 300nm-570nm, the fluorescence of radiation 608nm-630nm, and fluorescence efficiency is about 60%.Consider that when sunlight 4 entered fluorescence optical fiber, there was 10% reflection loss on the fluorescence optical fiber surface, total conversion efficiency is:
25％×90％×60％×60％＝8％
The lateral area of fluorescence optical fiber is: 10mm * 1m=10000mm
2, the sectional area of fluorescence optical fiber is: π (5mm)
2=78.5mm
2Therefore, the increase of the light intensity on the solar cell (also being equivalent light concentrating times) is:
Doubly.For the 614nm fluorescence near monochrome, the efficient of gallium arsenide solar cell is about 70%, and system total efficiency is about 5.6%.
Embodiment 2:
Referring to Fig. 1, Fig. 2 and Fig. 4.Neodymium glass (a kind of laser medium) is made the glass fluorescence optical fiber of diameter 1mm, long 1.5m, and an end is provided with reflection end cap 5, and reflection end cap 5 materials are aluminium, or silver, or gold, see Fig. 2.The numerical aperture 0.8 of fluorescence optical fiber (also promptly 80% fluorescence enters transmission mode).Get 500 of described fluorescence optical fibers, become the area of 0.5m * 1m by Fig. 4 solid matter, the unnecessary length of optical fiber is used to constitute fiber bundle, and is with the UV-3129 ultra-violet curing glue of Shenzhen letter meaning glue industry Co., Ltd that this fiber bundle crystal silicon solar energy battery is bonding.This optical fiber absorbs the sunlight (account for global solar radiation 45%) of 300nm-850nm, the fluorescence of radiation 1064nm, and fluorescence efficiency is about 80%.Consider when sunlight enters fluorescence optical fiber that there is 10% reflection loss on the fluorescence optical fiber surface, total conversion efficiency is:
45％×90％×80％×80％＝25.9％
The lateral area of fluorescence optical fiber is: 0.5m * 1m=500000mm
2, the space when considering many fluorescence optical fiber solid matters between fluorescence optical fiber, the actual area that occupies of fluorescence optical fiber is about 500 * 0.866mm
2=433mm
2Therefore, the increase of the light intensity on the solar cell (also being equivalent light concentrating times) is:
Doubly.For the 1064nm fluorescence near monochrome, the efficient of crystal silicon solar energy battery is about 50%, and system total efficiency is about 13%.
Embodiment 3:
Referring to Fig. 1, Fig. 2, Fig. 3 and Fig. 5.Embodiment 1 identical materials is made the optical fiber of diameter 0.1mm, and an end is established reflection end cap 5, and reflection end cap 5 materials are aluminium, or silver, or gold, see Fig. 2; The outer surface of fluorescence optical fiber 1 is provided with selective reflecting layer 6, and selective reflecting layer 6 materials are photonic crystal, or the high anti-coating of optics, sees Fig. 3.Described optical fiber is weaved into fabric, and the other end of optical fiber is bonding with the UV-3129 ultra-violet curing glue and the phosphorus gallium indium solar cell of Shenzhen letter meaning glue industry Co., Ltd, sees Fig. 5; Braid can be a clothing, or tent.
Claims (8)
1, photovoltaic power generation system of fluorescent optical fiber solar battery comprises fluorescence optical fiber and solar cell, it is characterized in that:
The two ends of described fluorescence optical fiber are connecting solar cell by transparent adhesive tape and are forming coupling optical path;
To crystal silicon solar energy battery, fluorescence optical fiber wavelength＜1100nm; For gallium arsenide solar cell, fluorescence optical fiber wavelength＜840nm; For phosphorus gallium indium solar cell, fluorescence optical fiber wavelength＜650nm.
2, photovoltaic power generation system of fluorescent optical fiber solar battery according to claim 1 is characterized in that: an end of described fluorescence optical fiber is connecting solar cell by transparent adhesive tape, and the other end is provided with the reflection end cap.
3, photovoltaic power generation system of fluorescent optical fiber solar battery according to claim 2 is characterized in that: described reflection end cover material is an aluminium, or silver, or gold.
4, photovoltaic power generation system of fluorescent optical fiber solar battery according to claim 1 is characterized in that: the outer surface of described fluorescence optical fiber is provided with selective reflecting layer.
5, photovoltaic power generation system of fluorescent optical fiber solar battery according to claim 1 is characterized in that: described selective reflecting layer material is a photonic crystal, or the high anti-coating of optics.
6, photovoltaic power generation system of fluorescent optical fiber solar battery according to claim 1 is characterized in that: described fluorescence optical fiber more than two is arranged in a plane.
7, photovoltaic power generation system of fluorescent optical fiber solar battery according to claim 1 is characterized in that: the above fluorescence optical fiber of the described six roots of sensation can be woven into braid.
8, photovoltaic power generation system of fluorescent optical fiber solar battery according to claim 7 is characterized in that: described braid is a clothing, or tent.
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| CNA200810195726XA CN101345502A (en) | 2008-08-28 | 2008-08-28 | Photovoltaic power generation system of fluorescent optical fiber solar battery |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104485880A (en) * | 2014-12-08 | 2015-04-01 | 四川钟顺太阳能开发有限公司 | Photonic crystal condenser and manufacturing method thereof |
| CN106059036A (en) * | 2015-04-15 | 2016-10-26 | 夏普株式会社 | Mobile electronic device casing |
| CN110260256A (en) * | 2019-05-29 | 2019-09-20 | 深圳市星汉激光科技有限公司 | A kind of white light laser source |
| CN111371399A (en) * | 2020-04-09 | 2020-07-03 | 郑州铁路职业技术学院 | Optical fiber conduction solar photovoltaic power generation system |
-
2008
- 2008-08-28 CN CNA200810195726XA patent/CN101345502A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104485880A (en) * | 2014-12-08 | 2015-04-01 | 四川钟顺太阳能开发有限公司 | Photonic crystal condenser and manufacturing method thereof |
| CN104485880B (en) * | 2014-12-08 | 2016-07-20 | 四川钟顺太阳能开发有限公司 | Photonic crystal condenser and preparation method thereof |
| CN106059036A (en) * | 2015-04-15 | 2016-10-26 | 夏普株式会社 | Mobile electronic device casing |
| CN110260256A (en) * | 2019-05-29 | 2019-09-20 | 深圳市星汉激光科技有限公司 | A kind of white light laser source |
| CN111371399A (en) * | 2020-04-09 | 2020-07-03 | 郑州铁路职业技术学院 | Optical fiber conduction solar photovoltaic power generation system |
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Open date: 20090114 |