WO2004114418A1 - 集光型光発電システム - Google Patents
集光型光発電システム Download PDFInfo
- Publication number
- WO2004114418A1 WO2004114418A1 PCT/JP2004/009233 JP2004009233W WO2004114418A1 WO 2004114418 A1 WO2004114418 A1 WO 2004114418A1 JP 2004009233 W JP2004009233 W JP 2004009233W WO 2004114418 A1 WO2004114418 A1 WO 2004114418A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- light
- incident
- light guide
- power generation
- generation system
- Prior art date
Links
- 238000010248 power generation Methods 0.000 title claims abstract description 34
- 238000006243 chemical reaction Methods 0.000 claims abstract description 25
- 230000000295 complement effect Effects 0.000 claims description 8
- 239000000463 material Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- NCGICGYLBXGBGN-UHFFFAOYSA-N 3-morpholin-4-yl-1-oxa-3-azonia-2-azanidacyclopent-3-en-5-imine;hydrochloride Chemical compound Cl.[N-]1OC(=N)C=[N+]1N1CCOCC1 NCGICGYLBXGBGN-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
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/0038—Linear indentations or grooves, e.g. arc-shaped grooves or meandering grooves, extending over the full length or width of the light guide
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/0045—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide
- G02B6/0046—Tapered light guide, e.g. wedge-shaped light guide
- G02B6/0048—Tapered light guide, e.g. wedge-shaped light guide with stepwise taper
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
- G02B6/0053—Prismatic sheet or layer; Brightness enhancement element, sheet or layer
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0075—Arrangements of multiple light guides
- G02B6/0076—Stacked arrangements of multiple light guides of the same or different cross-sectional area
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
- H01L31/054—Optical elements directly associated or integrated with the PV cell, e.g. light-reflecting means or light-concentrating means
- H01L31/0543—Optical elements directly associated or integrated with the PV cell, e.g. light-reflecting means or light-concentrating means comprising light concentrating means of the refractive type, e.g. lenses
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
- H01L31/054—Optical elements directly associated or integrated with the PV cell, e.g. light-reflecting means or light-concentrating means
- H01L31/0547—Optical elements directly associated or integrated with the PV cell, e.g. light-reflecting means or light-concentrating means comprising light concentrating means of the reflecting type, e.g. parabolic mirrors, concentrators using total internal reflection
-
- 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
- Y02E10/52—PV systems with concentrators
Definitions
- the present invention relates to a photovoltaic power generation system using a light guide.
- a photovoltaic power generation system using a layered concentrator combining a photoconductive layer and a light deflecting layer has been proposed as a means for solving the above-mentioned problems of thickness and weight (for example, see Japanese Patent Application Laid-Open No. H11-157, 1987). 2 0 0—1 4 7 2 6 2).
- the light deflecting layer has a saw-tooth shape on the lower surface provided with a reflective film, and is provided separately from the photoconductive layer. In such a configuration, the efficiency of trapping incident light in the photoconductive layer is extremely low, and most of the light leaks into the light deflection layer and becomes stray light.
- the stray light is repeatedly reflected in the light deflection layer, and part of the light is re-emitted from the incident surface.
- reflection by the reflective film always involves loss.
- the reflectance in the vicinity of the visible region is about 98% for silver, the highest for reflectance, about 92% for aluminum, and about 60% for nickel. Due to the reflection loss and re-emission, the light-collecting efficiency of the light-collecting body at the end face is extremely low, and is at most about 1%. Disclosure of the invention
- the present invention has been made to solve the above-mentioned problems of existing photovoltaic power generation systems. That is, the first problem to be solved in the present invention is to eliminate the need for a complicated tracking type light-collecting device which is likely to cause a failure, and to reduce the installation location of the photovoltaic power generation system and the strength of the supporting structure. To remove the restrictions on The second problem is to efficiently generate light regardless of the direction of the incident light and to increase the power generation efficiency by reducing the amount of lost light.
- An object of the present invention is to provide a high-efficiency photovoltaic power generation system that solves these problems, has a simple structure, has no moving parts that cause a failure, and can be installed anywhere.
- a photovoltaic power generation system includes a light guide having an incident surface on which external light is incident, and an exit surface that is not parallel to the incident surface but emits the external light, and
- the photoelectric conversion element provided facing the emission surface has a basic configuration, a reflector is provided on a light guide, and external light is supplied to the photoelectric conversion element.
- An object of the present invention is to provide a photovoltaic power generation system capable of collecting light incident from an incident surface having a larger area to a photoelectric conversion element having a smaller area by providing a function of guiding light in an existing direction.
- the present invention develops a reflector shape that receives incident light at an angle greater than the critical angle and totally reflects the light, and enhances the light collecting effect of the light guide in combination with peripheral members, thereby simplifying the structure. It provides a highly efficient photovoltaic power generation system that can be installed anywhere.
- the present invention provides a light guide having an incident surface through which external light enters, and an exit surface not parallel to the incident surface through which the external light exits, and a photoelectric member provided to face the exit surface.
- a photovoltaic system having at least one conversion element, wherein the light guide reflects light incident into the light guide on at least one of an incident surface and an opposite surface thereof. It has a plurality of reflectors.
- a light deflecting sheet for changing the direction of external light is provided to face the incident surface.
- a reflector that reflects light emitted from other than the emission surface of the light guide is provided on a surface opposite to the incidence surface of the light guide.
- the reflection plate has a surface inclined with respect to a normal direction of the incident surface and a surface inclined in a direction opposite to the surface.
- the reflector preferably has an A surface inclined at 2 ° to 60 ° with respect to a normal direction of the incident surface, and a direction opposite to the A surface with respect to the normal direction of the incident surface. It preferably has a surface B inclined from 80 ° to 89 °. Further, according to the present invention, the reflector has an A surface inclined by 2 ° to 60 ° with respect to a normal direction of the incident surface, and an A surface opposite to the normal direction of the incident surface. It is preferable to have a surface B inclined 30 ° to 50 ° in the direction. Further, in the invention, it is preferable that the reflector has an angle of 40 ° with respect to a normal direction of the incident surface.
- A-plane inclined at about 50 ° and a B-plane inclined at 40 ° to 50 ° in a direction opposite to the A-plane with respect to the normal direction of the incident surface it is preferable that a plane parallel to the incident plane be provided between the A plane and the B plane.
- the light guide is an aggregate of a plurality of light guides, and the plurality of light guides are reflectors having a structure complementary to a surface where two adjacent light guides are in contact with each other. Is preferably provided.
- FIG. 1 is a schematic sectional view showing a first embodiment of a photovoltaic power generation system including a light guide. '...
- FIG. 2 is a schematic cross-sectional view illustrating a second embodiment of the photovoltaic power generation system according to the present invention including a light guide and a light deflection sheet formed by a prism, and the principle of light collection.
- the dashed line represents the path taken by the incident light.
- FIG. 3 is a diagram illustrating the relationship between the angle of the reflection surface of the light guide and the angle of incidence, which is required for the light incident on the light guide to be guided in the light guide by total internal reflection.
- the refractive index of the light guide material was calculated as 1.58.
- FIG. 4 is a schematic cross-sectional view illustrating an example of a photovoltaic power generation system according to a third embodiment of the present invention including a light guide and a reflector, and the principle of light collection. The broken line indicates the path of the incident light.
- Fig. 5 is a cross-section showing the fourth embodiment of the photovoltaic power generation system according to the present invention using two light guides having adjacent structures with complementary structures and a light deflection sheet composed of prisms, and the principle of light collection. It is a schematic diagram. The dashed line indicates the path of the incident light. You.
- FIG. 6 is a schematic cross-sectional view showing a fifth embodiment of a photovoltaic power generation system according to the present invention using a plurality of light guides whose adjacent surfaces have complementary structures, and the principle of light collection.
- the dashed line represents the path taken by the incident light.
- the photovoltaic system of the present invention has a light guide having an entrance surface 7 for receiving external light, and an exit surface 8 that is not parallel to the incident surface but emits the external light.
- a body and a photoelectric conversion element provided to face the emission surface have a basic configuration.
- the light guide is provided with a plurality of reflectors 5 for reflecting light incident on the inside of the light guide on at least one of the incident surface and the opposite surface, thereby guiding the traveling direction of the incident light. It can be converted to a waveable angle.
- FIG. 1 shows an example in which a reflector is provided on the surface opposite to the incident surface. Since the incident light guided in the light guide is focused on the photoelectric conversion element on the end face, the power generation efficiency per unit area of the photoelectric conversion element can be improved.
- the reflector 5 includes, as shown in FIG. 1, a ⁇ surface inclined at an angle ( ⁇ ⁇ ) with respect to the normal direction of the incident surface 7, and an A with respect to the normal direction of the incident surface 7. It is preferable to adopt a shape having an angle ( ⁇ 2) inclined B surface in the direction opposite to the surface. By doing so, the incident light is critical Since it is possible to receive the light at an angle greater than or equal to the angle and totally reflect the light, and to provide a reflector having a specific shape, the loss of light is small.
- a method of forming a reflective film such as a metal vapor-deposited film on the surface of the reflector to form the reflector 5 can be used.
- this method of providing a reflective film since the reflectance never reaches 100%, if the light guided in the light guide is reflected many times by the reflector, there is little reflection loss.
- the final light collection efficiency may be greatly reduced, there is an advantage in that it is easy to manufacture. Which method is selected can be determined according to the application and the required photoelectric conversion capability. In the example of FIG.
- a part of the light incident on the light guide 1 is totally reflected by one of the reflection surfaces 5 A of the reflector 5, and the light is incident on the light guide with respect to the normal to the incident surface. It is deflected in a direction that forms an angle greater than the critical angle. The deflected incident light propagates through the light guide and reaches the output surface 8 while being totally reflected by the upper and lower surfaces of the light guide. Even if the angle of the incident external light 6 changes, the light-collecting characteristics are not significantly affected. '
- a light deflection sheet 3 can be further provided in the configuration of FIG. FIG. 2 shows an example in which a prism sheet is used as the light deflection sheet 3.
- the operating principle of the light deflection sheet used in the present invention is not limited to refraction and total reflection by the downward prism.
- Light deflection sheets using other principles include, for example, one using a light interference effect such as a diffraction grating, an array of micro optical elements such as a lens array, and one using refraction by an upward prism. Can be mentioned.
- the reflectors 5 having the same shape are continuously provided, but reflectors having different shapes may be provided in a mixed manner.
- the projectiles may be separated.
- the reflector may be convex or concave with respect to the lower plane of the light guide plate.
- the reflection at the light guide end face can be reduced, which is an intermediate between the light guide and the photoelectric conversion element. It is more preferable that the space is filled with a medium having a refractive index than that of the space.
- the incident angle 0 2 becomes It is preferable to be within the angle range specified by the expression.
- the condition for the reflected light to be totally reflected by the upper surface of the light guide (that is, the incident surface 7) and guided in the light guide is that the traveling direction of the reflected wave is in relation to the normal direction of the incident surface 7.
- the angle to make ⁇ 3 is
- polycarbonate having a refractive index of 1.58 is assumed as the material of the light guide, and the apex angle of the reflecting surface 5A is 8.8 °.
- the present invention is not limited to these parameters.
- the critical angle 0c is 39.27 °, it can be seen from equation (4) that 0> 73.08 ° is required.
- the light incident on the photovoltaic system of the present embodiment mainly comes from the normal direction, it is possible to improve the efficiency by setting the angle of incidence on the light guide plate to 73.08 ° or more using a light deflection film. High light collection and photoelectric conversion are possible.
- Figure 3 shows how the lower limit of the incident angle required for incident light to be guided in the light guide when the angle a that the reflecting surface makes with respect to the normal direction of the incident surface 7 is changed. It is illustrated whether it changes.
- the refractive index of the light guide was 1.58.
- the lower limit of the incident angle monotonically increases with respect to the angle ⁇ of the reflecting surface.
- the angle ⁇ of the reflecting surface is small to some extent.
- the inclination of the reflecting surface in order to guide vertically incident light, that is, light having an incident angle of 0 °, the inclination of the reflecting surface must be about 50 ° or less.
- FIGS. show schematic diagrams when assuming that the light guide has a refractive index of 1.58. Is not limited to this refractive index value. Also, in the figure, a reflector having the same shape as a convex shape with respect to the light guide is depicted, but the reflector may be concave with respect to the light guide, and a reflector having a different shape may be used. They may be mixed.
- a third embodiment of the photovoltaic power generation system of the present invention shown in FIG. 4 includes a light guide, a reflector that reflects light emitted from a portion other than the emission surface of the light guide, and a light guide that faces the emission surface of the light guide. It has a photoelectric conversion element provided.
- the reflection plate may be a flat reflection surface, but has a surface inclined with respect to the normal direction of the incident surface and a surface inclined in a direction opposite to the surface as shown in FIG. It is preferable to use a reflection plate having a shape having the following shape.
- the third embodiment shown in FIG. 4 is a schematic diagram in which ⁇ 1 and ⁇ 2 are set to 50 ° and 70 °, respectively.
- the light that is directly incident on the light guide on path a is reflected by the reflection surface 5A with an inclination of ⁇ 1, is guided in the light guide by changing its traveling direction from horizontal to 10 ° upward, and exits from the light guide 8 Out of the device and reach the photoelectric conversion element.
- the light incident on the path b is continuously reflected by the reflecting surface 5 ° with the inclination ⁇ 1 and the reflecting surface 5B with the inclination a2, and then changes its traveling direction to 50 ° upward with respect to the horizontal direction. It is guided through the light guide.
- Light entering the light guide through paths c and d passes through the reflecting surface and temporarily leaks light.However, the traveling direction is changed in the horizontal direction by the reflecting plate with the inclined surface, and the light enters the light guide. It is collected, guided and reaches the end face.
- the values of the angles ⁇ 1 and ⁇ 2 formed by the reflecting surfaces 5A and 5B constituting the reflector 5 with respect to the normal direction of the incident surface 7 are not particularly limited, and various combinations can be adopted. There are preferable values depending on the configuration of the entire photoelectric conversion system. For example, in order to achieve the light path shown in the third embodiment, when the refractive index of the material of the light guide is 1.58, ⁇ 1 is 45 ° to 50 °, and ⁇ 2 Is less than or equal to 120 ° — ⁇ , that is, 75 ° It is preferably about 70 °. Within this angle range, in paths a and b in FIG. 4, total reflection occurs on reflection surfaces 5A and 5B and the upper surface of the light guide, and light loss can be reduced.
- ⁇ ⁇ is in the range of 2 ° to 60 ° and that ⁇ 2 is in the range of 80 ° to 89 °. If the range exceeds 60 °, the light in the light guide plate tends to be totally reflected and scattered outside the light guide plate, and if it is less than 2 °, the light passes through the reflective surface and goes out of the light guide plate. They tend to escape. Also, when the range of ⁇ 2 exceeds 89 °, the limit of the incident angle represented by the equation (4) becomes too severe, and when it is less than 80 °, the light condensing property tends to decrease.
- ⁇ 1 is in the range of 2 ° to 60 ° and (3 ⁇ 42 is in the range of 30 ° to 50 °.
- the angle exceeds 60 °, the light in the light guide plate tends to be totally reflected and scattered outside the light guide plate.
- the angle is less than 2 °, the light passes through the reflective surface and escapes outside the light guide plate.
- the range of ⁇ 2 exceeds 50 °, the proportion of incident light that escapes to the lower surface of the light guide without being totally reflected increases, and when it is less than 30 °, the reflection surface The ratio of light that does not enter the light source increases.
- FIG. 5 shows a photovoltaic power generation system according to a fourth embodiment of the present invention that can collect leaked light with a plurality of light guides.
- a light deflection sheet formed by a prism a first light guide provided with a reflector on the lower surface, and a second light guide provided adjacent to the lower side of the light guide are provided.
- the first light guide 1 is provided with a reflector 5 only on the surface opposite to the incident surface, and the first light guide 1 includes a photoelectric conversion element provided so as to face the left and right emission surfaces of these light guides.
- the reflector 5 is formed on both upper and lower surfaces of the light guide 1 ′.
- the light deflection sheet 3 is not limited to the prism sheet as shown in the figure, and the shape of the reflector 5 is the shape shown in the figure. Is not limited to the above.
- the positional relationship between the two light guides 1 and 1 ' is not particularly limited.
- they may be partially or wholly in contact, or completely separated.
- the shape of each reflector may be a shape that is matched by the opposing surfaces of 1 and 1 ′, and may not be.
- the light guides 1 and 1 ′ may be light guides having different refractive indexes.
- the shape of the reflectors be such that they face each other at 1 and 1 'as shown in FIG.
- the vertically incident light that has been turned into oblique light by the light deflecting sheet enters the light guide through paths a and b.
- the light incident on the path b is totally reflected by the reflection surface of the upper light guide and enters the lower second light guide.
- the lower light guide has a reflector on each of the upper surface and the lower surface. Among them, the reflector on the upper surface has a shape complementary to that of the light guide on the upper side that is adjacent to the reflector. By making the adjacent reflectors complementary, the light can be collected by the lower light guide without changing the direction of the leaked light and can be guided effectively.
- the leaked light incident on the lower light guide repeats total reflection by the upper and lower reflectors, and reaches the photoelectric conversion element on the left.
- FIG. 6 shows a fifth embodiment of a photovoltaic system including a plurality of light guides capable of guiding vertically incident light and a photoelectric conversion element provided on the right end face of the light guide.
- Reflectors having mutually complementary shapes are provided on the surfaces where the light guides are in contact with each other. It is assumed that the material of each light guide has a refractive index of 1.58. The bright effect is not limited to this refractive index value. Although reflectors having the same shape are provided at equal intervals in the drawing, reflectors having different shapes may be mixed, and the intervals between the reflectors may be unequal.
- the reflection surface inclined to the right is set at an angle at which vertically incident light can be totally reflected.
- the light incident on the path a is totally reflected by the uppermost light guide, is changed its traveling direction from horizontal to 10 ° upward, is guided in the uppermost light guide, and travels through the uppermost light guide to the photoelectric converter on the right end face.
- the light incident on the path b passes through the reflecting surface inclined to the left and enters the second light guide. Since the reflectors in contact with the first light guide and the second light guide have complementary shapes, the incident light of b does not change its traveling direction and the reflection surface of the second light guide Incident on.
- the positions of the reflectors provided on the lower surfaces of the respective light guides be shifted in the left-right direction in the drawing so that the leaked light can be efficiently captured.
- the light of the path c is totally reflected for the first time in the third light guide, and is guided in the third light guide to reach the right end face.
- the concentrating photovoltaic power generation system As described above, in the concentrating photovoltaic power generation system according to the present invention, most of the incident light is collected on the end face of the light guide, so that the power generation efficiency of the photoelectric conversion element provided on the end face of the light guide is improved. Can be increased. In addition, since high-efficiency light collection and power generation can be performed irrespective of the angle of incidence of the light beam, a tracking device that directs the power generation device in the direction of the incident light becomes unnecessary, and the device can be downsized. For this reason, the photovoltaic power generator can be provided in more various places, and the application to portable use becomes easy. In addition, the light collection ratio is about three times, the area required for expensive photoelectric conversion elements can be reduced to 13 and the equipment cost can be reduced.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Photovoltaic Devices (AREA)
- Light Guides In General And Applications Therefor (AREA)
- Optical Elements Other Than Lenses (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2003-177521 | 2003-06-23 | ||
JP2003177521A JP2007027150A (ja) | 2003-06-23 | 2003-06-23 | 集光型光発電システム |
Publications (1)
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WO2004114418A1 true WO2004114418A1 (ja) | 2004-12-29 |
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PCT/JP2004/009233 WO2004114418A1 (ja) | 2003-06-23 | 2004-06-23 | 集光型光発電システム |
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JP (1) | JP2007027150A (ja) |
TW (1) | TW200510868A (ja) |
WO (1) | WO2004114418A1 (ja) |
Cited By (49)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007034397A2 (en) * | 2005-09-19 | 2007-03-29 | Koninklijke Philips Electronics N.V. | Luminaire with stack of flat panel light guides |
EP1988332A1 (en) | 2007-04-30 | 2008-11-05 | Qualcomm Mems Technologies, Inc. | Dual film light guide for illuminating displays |
EP2061092A1 (en) | 2007-11-16 | 2009-05-20 | Qualcomm Mems Technologies, Inc. | Thin film planar solar concentrator/collector |
WO2009102671A2 (en) * | 2008-02-12 | 2009-08-20 | Qualcomm Mems Technologies, Inc. | Thin film holographic solar concentrator/collector |
WO2010051570A1 (de) * | 2008-11-04 | 2010-05-14 | Al Systems Gmbh | Lichtleitelement für eine beleuchtungseinrichtung |
EP2201309A2 (en) * | 2007-09-10 | 2010-06-30 | Banyan Energy, Inc | Compact optics for concentration, aggregation and illumination of light energy |
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