JP3151300U - Solar power plant - Google Patents

Abstract

An object of the present invention is to provide a solar power generation apparatus that efficiently generates power without deteriorating aesthetics. A solar power generation device includes a frame formed in a sphere or a polyhedron provided with a plurality of matching layers, and a reflection provided on an inner surface of the frame excluding a portion where a matching layer is provided. Means, and a plurality of dielectric antennas provided on the outer surface of the location where the matching layer is provided and guiding light from the outside to the inside of the frame, and the inside of the frame or a part thereof And a solar cell that generates light by directly receiving light guided into the frame and / or reflecting the light by a reflecting means. [Selection] Figure 1

Description

  The present invention relates to a solar power generation device.

  In recent years, it is said that various problems will be faced in the future for securing and using energy resources. For example, the oil crisis, the depletion of fossil fuels, the occurrence of environmental destruction due to combustion gases, and the like. Along with this, renewable energy such as wind power, hydraulic power, and solar light has attracted attention, and development of technology using these has been promoted.

  In particular, with regard to power generation technology using solar energy, there are many products that have been put into practical use and are actually used, and are exhibiting high utilization effects. For example, a concentrating solar power generation device is disclosed in Patent Document 1 shown below.

  However, in the solar power generation device of Patent Document 1, the surface of the solar cell is exposed and the aesthetic appearance is impaired. In addition, since the power generation efficiency varies depending on the angle between the sunlight and the solar cell, it is not possible to generate power efficiently unless a mechanism for tracking the sun is provided.

Japanese Patent Application No. 2002-319492

  An object of the present invention is to provide a solar power generation apparatus that efficiently generates power without losing aesthetic appearance.

  The photovoltaic power generation device of the present invention includes a frame formed in a sphere or a polyhedron provided with a plurality of matching layers, and reflecting means provided on an inner surface of the frame excluding a portion where the matching layers are provided. And a condensing means provided on the outer surface of the location where the matching layer is provided, and a plurality of dielectric antennas for guiding light from the outside to the inside of the frame, and provided inside or a part of the frame And a solar cell that generates light by directly receiving light guided into the frame and / or reflecting it by a reflecting means to generate power. The light guided to the inside of the frame by the dielectric antenna is reflected directly and / or by the reflecting means and applied to the solar cell, whereby the solar cell generates power.

  The solar power generation device of the present invention is characterized in that a solar cell is provided outside the frame body, and a lens for concentrating the light guided to the inside of the frame body on the solar cell is provided in a part of the frame body. And The solar cell receives light guided inside the frame body through a lens outside the frame body.

  The solar power generation device of the present invention is characterized in that the light receiving surface of the solar cell is provided perpendicular to the angle at which the sun goes south. Incident light from the back surface of the solar cell is eliminated.

  The solar power generation device of the present invention is characterized in that a plurality of dielectric antennas are provided on a light receiving surface of a solar cell. The dielectric antenna efficiently guides light of a specific wavelength to the solar cell.

  According to the solar power generation device of the present invention, since the frame constituting the light condensing means is a sphere or a polyhedron, light from a 360 ° direction can be condensed. Therefore, it is not necessary to provide a mechanism for tracking the sun. Moreover, since the surface of a solar cell can be covered with a condensing means, aesthetics are not spoiled.

  According to the solar power generation device of the present invention, since the reflecting means is provided on the inner surface of the frame constituting the light collecting means, the light guided into the frame at an angle that is not directly irradiated to the solar cell is also reflected by the reflecting means. It is possible to irradiate the solar cell with the reflected light. Therefore, the light collection efficiency is very good.

  According to the solar power generation device of the present invention, since the light guided to the inside of the frame constituting the light collecting means is irradiated to the solar cell through the lens, the light is efficiently condensed on the solar cell. Can do.

  According to the solar power generation device of the present invention, since the light receiving surface of the solar cell is provided perpendicular to the angle at which the sun goes south, incident light from the back surface of the solar cell is eliminated, and the solar cell power generation It is possible to efficiently receive light with an efficient irradiation angle.

  According to the solar power generation device of the present invention, since the dielectric antenna is provided on the light receiving surface of the solar cell, the light collection efficiency and power generation efficiency of the solar cell can be further increased.

It is a side view which shows the solar power generation device which concerns on this invention. It is the fragmentary sectional view which expanded the reflection means which concerns on this invention. It is sectional drawing to which the solar cell concerning this invention was expanded. It is a side view which shows the solar power generation device which concerns on other embodiment.

  A photovoltaic power generation apparatus according to the present invention will be described with reference to the drawings.

  1 and 2 includes a frame 22 formed on a sphere provided with a plurality of matching layers 23, and an inner surface of the frame 22 excluding a portion where the matching layers 23 are provided. A condensing means 10 comprising: a reflecting means 21 provided on the outer surface of the frame body 22; and a plurality of dielectric antennas 11 provided on the outer surface of the portion where the matching layer 23 is provided and guiding light from the outside to the inside of the frame body 22; The solar cell 12 is provided in the frame body 22 or a part of the frame body 22 and receives the light guided into the frame body 22 directly and / or by the reflecting means 21 to receive and generate power. The light guided to the inside of the frame 22 constituting the light condensing means 10 efficiently by the dielectric antenna 11 is reflected directly and / or by the reflecting means 21 and applied to the solar battery 12, whereby the solar battery 12 is Generate electricity.

  As shown in FIG. 2, the condensing means 10 is formed by providing the reflecting means 21 on the inner surface of the frame body 22 provided with a plurality of matching layers 23 and the dielectric antenna 11 on the outer surface of the frame body 22. Yes. The reflecting means 21 is provided at a place where the matching layer 23 is not present. The dielectric antenna 11 is provided on the matching layer 23. The structure of the condensing means 10 is not limited to this. For example, the frame body 22 and the reflection means 21 may be configured integrally. Further, the dielectric antenna 11 may be disposed on the matching layer 23, or a polycarbonate resin or the like may be filled between the adjacent dielectric antennas 11 so that the outer surface of the frame body 22 is flush with the matching layer 23. Good.

  The condensing means 10 not only emits the incident light 2a directly on the solar cell 12 like sunlight 2A, but also emits the light that is not directly irradiated on the solar cell 12 like sunlight 2B. It can be reflected by the reflecting means 21 on the inner surface and irradiated to the solar cell 12 as reflected light 2b ′. The condensing means 10 can cover the surface of the solar cell 12, and can design the outer surface.

  The frame 22 is formed in a sphere. “Sphere” means “spheroid”. That is, it shall be used in a broad sense including true spheres, oblate spheres, and long spheres. The shape of the frame 22 is not limited to this, and may be, for example, a polyhedron. The size of the frame body 22 is appropriately designed according to the size of the solar cell 12. The frame body 22 is preferably formed of a resin such as polycarbonate resin or ABS resin, but is not limited thereto. For example, you may form using a metal etc. The matching layer 23 provided on the frame 22 may be a nano-sized minute layer.

  The light incident on the inside of the frame body 22 from the matching layer 23 is directly and / or reflected by the reflecting means 21 and applied to the solar cell 12. Although some light exits from the matching layer 23 to the outside, since the matching layer 23 is a nano-sized hole, most of the incident light is reflected by the reflecting means 21 and applied to the solar cell 12. Since the frame 22 is a sphere, it can receive light from a 360 ° direction. Therefore, for example, even reflected light from the ground can be received. Thereby, it is not necessary to provide a mechanism for tracking the sun.

  The reflecting means 21 is preferably formed with a very high reflectivity such as an ultra-high reflectivity mirror. The light guided to the inside of the frame body 22 is reflected by the reflecting means 21 with almost no absorption and is applied to the solar cell 12. The reflection means 21 is not limited to this, and the inner surface of the frame body 22 only needs to be a mirror surface. For example, a metal mirror or an acrylic mirror may be provided.

  The dielectric antenna 11 is disposed on the outer surface of the frame body 22 located on the matching layer 23. The dielectric antenna 11 has a shape such as a prism, a cylinder, a truncated pyramid, or a truncated cone. Examples of the material of the dielectric antenna 11 include organic dielectrics such as polypropylene and fluororesin, and may be inorganic dielectrics such as glass and silicon dioxide.

  The dielectric antenna 11 captures light as an electromagnetic wave, and receives and transmits light of a specific wavelength. The dielectric antenna 11 efficiently guides light of a specific wavelength into the frame 22. The wavelength of the light guided by the dielectric antenna 11 is preferably set to a wavelength at which power generation is efficiently performed by the solar cell 12. Such a wavelength is called a maximum sensitivity wavelength.

  The height of the dielectric antenna 11 is preferably 0.5 to 10 times the maximum sensitivity wavelength. The minimum width of the dielectric antenna 11 is preferably 0.5 to 2 times the height, and the interval between the adjacent dielectric antennas 11 is preferably 0.5 to 10 times the maximum sensitivity wavelength. The optimum height of the dielectric antenna 11 varies depending on the material of the solar cell 12 and the like. Therefore, it is appropriately selected depending on the material of the solar cell 12.

  The dielectric antenna 11 is provided in a direction perpendicular to the frame body 22. Sunlight 3A incident from the vertical direction on the upper surface of the dielectric antenna 11 is guided into the frame 22 as incident light 3a. In addition, sunlight 3B, 3C from an elevation angle of ± 60 ° when viewed from the dielectric antenna 11 is also guided into the frame 22 as incident light 3b, 3c by the dielectric antenna 11. Light other than the direction perpendicular to the upper surface of the dielectric antenna 11 can also enter the inside of the frame 22, so that the light collection efficiency is good.

  As shown in FIG. 3, the solar cell 12 is configured by providing the semiconductor power generation layer 5 between the front electrode layer 31 and the back electrode layer 32. Further, the dielectric antenna 30 and the protective film 34 are provided on the surface electrode layer 31. A matching layer 33 is formed on the surface electrode layer 31 located below the dielectric antenna 30.

  The solar cell 12 is provided in the condensing means 10 so that the light-receiving surface of the solar cell 12 is perpendicular to the angle at which the sun goes south. Thereby, the incident light from the back surface of the solar cell 12 can be excluded. Therefore, it is possible to efficiently receive light at an irradiation angle with good power generation efficiency of the solar cell 12.

  The semiconductor power generation layer 5 is formed by joining a p-type semiconductor layer 5a and an n-type semiconductor layer 5b. The material of the semiconductor power generation layer 5 is preferably a silicon-based semiconductor such as polycrystalline Si, single crystal Si, or thin film Si, but is not limited thereto. For example, a compound or organic semiconductor may be formed as a material.

  When the semiconductor power generation layer 5 is irradiated with light, holes and electrons are generated. The generated holes are attracted to the p-type semiconductor layer 5a side, and the electrons are attracted to the n-type semiconductor layer 5b side. Thereby, an electromotive force is generated between the p-type semiconductor layer 5a and the n-type semiconductor layer 5b.

  The surface electrode layer 31 is formed of a metal electrode. The surface electrode layer 31 is preferably formed of a metal thin film such as aluminum, copper, or silver, but is not limited thereto. The back electrode layer 32 is similar to this.

  The surface electrode layer 31 transmits light from the matching layer 33. The matching layer 33 may be a nano-sized minute layer. Although the metal electrode does not have translucency, the transmissivity of the surface electrode layer 31 does not decrease because the dielectric antenna 30 is provided on the matching layer 33. Since the metal electrode has an extremely small electric resistance, the generated power can be output efficiently.

  The dielectric antenna 30 has the same characteristics as the dielectric antenna 11 described above. Therefore, the incident light and the reflected light guided into the frame body 22 are efficiently guided to the solar cell 12. For example, not only the light 4 a incident perpendicularly to the dielectric antenna 30 but also the lights 4 b and 4 c from an elevation angle of ± 60 ° when viewed from the dielectric antenna 30 are guided to the solar cell 12. Dielectric antenna 30 can further increase the light collection efficiency and power generation efficiency of solar cell 12.

  The protective film 34 is formed by filling a polycarbonate resin or the like between adjacent dielectric antennas 30. The surface of the solar cell 12 can be covered with the protective film 34 and the dielectric antenna 30.

  The solar power generation device 1 is not limited to this embodiment, and can be implemented in other forms. For example, as shown in FIG. 4, the solar power generation device 1 is provided with the solar cell 12 outside the frame body 22 so that the light receiving surface of the solar cell 12 is perpendicular to the south-south angle of the sun. The form which condenses the light guide | induced to the inside of the frame 22 with the lens 41 provided in the frame 22 and irradiates light to the solar cell 12 may be sufficient.

  As another embodiment, a double-sided light receiving solar cell or a combination of a plurality of solar cells so that light can be received on both sides may be provided at any position inside the light collecting means 10. .

  As another embodiment, a plurality of photovoltaic power generation apparatuses 1 may be arranged and used in an array.

  The solar power generation device according to the embodiment of the present invention exemplified above should not be construed as substantially limiting the technical idea of the present invention. For example, the solar power generation device of the present invention may use a solar cell surface that does not have a dielectric antenna and a protective film. Further, the shape of the solar cell can be arbitrarily changed to a conical shape or the like.

  The implementation of the present invention can be carried out by combining the above-described embodiments or usage examples. Therefore, the present invention can be carried out without departing from the gist of the present invention, with appropriate improvements, changes or additions based on the ingenuity and ingenuity of those skilled in the art.

  DESCRIPTION OF SYMBOLS 1 ... Solar power generation device, 2A, 2B, 3A, 3B, 3C ... Sunlight, 2a, 2b, 3a, 3b, 3c ... Incident light, 2b '... Reflected light, 4a, 4b, 4c ... Light, 5 ... Semiconductor Power generation layer, 5a ... p-type semiconductor layer, 5b ... n-type semiconductor layer, 10 ... light collecting means, 11 ... dielectric antenna, 12 ... solar cell, 21 ... reflecting means, 22 ... frame, 23 ... matching layer, 30 A dielectric antenna, 31 a front electrode layer, 32 a back electrode layer, 33 a matching layer, 34 a protective film, and 41 a lens.

Claims (4)

A frame formed in a sphere or a polyhedron provided with a plurality of matching layers, a reflecting means provided on an inner surface of the frame other than a portion where the matching layers are provided, and the matching layers are provided. A plurality of dielectric antennas that are provided on an outer surface of the frame and guide light from the outside to the inside of the frame,
A solar cell that is provided inside or a part of the frame and receives and directly generates light guided into the frame and / or reflected by the reflecting means;
Solar power generation device with   The said solar cell is provided in the exterior of the said frame, The lens which condenses the light guide | induced to the inside of this frame to the said solar cell was provided in a part of this frame. Solar power generator.   3. The solar power generation device according to claim 1, wherein a light receiving surface of the solar cell is provided perpendicular to an angle at which the sun goes south. The solar power generation device according to any one of claims 1 to 3, wherein a plurality of dielectric antennas are provided on a light receiving surface of the solar cell.

Images