Solar power generation equipment

Abstract

This reduces the installation load on the building while suppressing the temperature rise of the solar panels, thereby improving the power generation efficiency of the solar panels. [Solution] The solar power generation device includes a solar panel 4 in which a plurality of electrically connected solar power generation elements 5 are sealed with a sealing layer 8, and an ultraviolet and infrared ray shading plate 25 that reduces the ultraviolet and infrared ray regions of the sunlight spectrum. In this solar power generation device, the solar panel is detachably attached to the wall surface of an outer wall 3 of a building 2, and the ultraviolet and infrared ray shading plate faces the sunlight incident side of the solar panel, covering the entire sunlight incident side, and is installed on the wall surface of the outer wall of the building at a distance from the solar panel, thereby forming an air circulation space 30 between the solar panel and the panel.

Description

[Technical Field]

[0001] The present invention relates to a solar power generation device using a solar power generation panel. [Background technology]

[0002] BACKGROUND ART In order to generate power by effectively utilizing sunlight as a renewable energy source, a solar power generation system has been proposed in which solar power generation panels are installed on the rooftop or outer wall surface of a building in a sunny location.

[0003] Solar panels installed in sunny locations can generate electricity by efficiently utilizing sunlight. However, solar panels installed on the rooftops or outer walls of buildings that can effectively utilize sunlight tend to become relatively hot. The power generation efficiency of solar panels decreases as the temperature rises. In order to maintain the power generation efficiency of solar panels, it is desirable to suppress the temperature rise of solar panels.

[0004] Therefore, in order to suppress the rise in temperature of a solar power generation panel installed in a sunny location, a solar power generation device provided with an air flow supply mechanism has been proposed (Patent Document 1).

[0005] Furthermore, a conventionally widely used solar power generation panel includes a panel body that integrally combines multiple solar power generation elements arranged in parallel on a surface, a resin sealing layer made of a transparent synthetic resin that seals the solar power generation elements, a light-transmitting substrate laminated on the light-receiving surface side of the resin sealing layer, and a backsheet laminated on the back surface side of the resin sealing layer. The outer periphery of the panel body is supported by a support frame made of metal or synthetic resin (Patent Document 2, Patent Document 3). Multiple solar power generation panels of this type are combined via connection cords drawn from the panel body and installed on the roof of a building to form a solar power generation device.

[0006] The solar power generation panel is installed by fixing a support frame to a support member provided on the roof of a building. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Japanese Patent Publication No. 2021-156059 [Patent Document 2] WO2019 / 087918 [Patent Document 3] Patent Publication No. 2022-117617 Summary of the Invention [Problem to be solved by the invention]

[0008] However, conventionally proposed solar power generation systems that have an airflow supply mechanism to suppress the temperature rise of solar panels not only have a complicated mechanism for creating the airflow to suppress the temperature rise of the solar panels, but also impose a large installation load on the building.

[0009] Furthermore, synthetic resin materials are used as the material for the resin sealing layer that seals the solar power generation elements in conventionally widely used solar power panels. The panel body and the support frame that supports the panel body are also bonded together with a synthetic resin adhesive. The synthetic resin material that makes up the transparent resin sealing layer is affected by ultraviolet rays contained in sunlight, and its transparency deteriorates. This deterioration in the transparency of the resin sealing layer leads to a deterioration in the power generation performance of the solar power panel.

[0010] Furthermore, the synthetic resin adhesive that bonds the panel body to the support frame is also affected by ultraviolet rays, causing a deterioration in the bond strength between the panel body and the support frame, which can compromise stable installation on building rooftops and other installation locations.

[0011] The technical objective of the present invention is to provide a solar power generation device that suppresses the temperature rise of solar power generation panels while reducing the installation load on a building, thereby improving the power generation efficiency of the solar power generation panels and achieving a longer lifespan.

[0012] Another technical object of the present invention is to provide a solar power generation device that effectively utilizes sunlight of wavelengths that contribute to power generation while suppressing a rise in temperature of the solar power generation panel, thereby achieving efficient power generation.

[0013] Furthermore, a technical object of the present invention is to provide a solar power generation device that can suppress deterioration in power generation efficiency due to aging and realize stable solar power generation. [Means for solving the problem]

[0014] A solar power generation device proposed to solve the above-mentioned technical problems includes a solar power generation panel in which a plurality of electrically connected solar power generation elements are sealed with a sealing layer, and an ultraviolet and infrared shading plate that reduces the ultraviolet and infrared spectra of the sunlight spectrum. In this solar power generation device, the solar power generation panel is detachably attached to the wall surface of an outer wall of a building, and the ultraviolet and infrared shading plate faces the sunlight incident side of the solar power generation panel and covers the entire sunlight incident side, and is installed on the wall surface of the outer wall of the building at a distance from the solar power generation panel, thereby forming an air circulation space between the solar power generation panel and the ultraviolet and infrared shading plate.

[0015] In the present invention, the solar panel is characterized in that it is installed on the wall surface of the outer wall of the building via a non-flammable heat insulating material.

[0016] The ultraviolet and infrared ray shielding plate is attached to the outer wall of the building, leaving the lower and upper sides of the outer wall open.

[0017] The ultraviolet and infrared shading plate used in the solar power generation device of the present invention is formed by laminating an infrared absorbing layer that reduces the spectrum in the infrared region of the solar spectrum and an ultraviolet absorbing layer that reduces the spectrum in the ultraviolet region of the solar spectrum on one side of a transparent substrate that transmits sunlight, and further laminating a protective layer on top of that, and is attached to the wall surface of the outer wall of the building with the other side of the substrate as the sunlight receiving surface.

[0018] The ultraviolet and infrared shading plate is formed by laminating an ultraviolet and infrared absorbing layer that reduces the ultraviolet and infrared regions of the sunlight spectrum on one side of a transparent substrate that transmits sunlight, and further laminating a protective layer on top of it, and the other side of the substrate is used as the sunlight receiving surface, so that it can be attached to the wall surface of the outer wall of the building.

[0019] Furthermore, the ultraviolet and infrared shading plate is formed by laminating an ultraviolet and infrared absorbing layer that reduces the ultraviolet and infrared regions of the sunlight spectrum on one side of a transparent substrate that transmits sunlight, and further laminating a protective layer that includes a heat conduction element, and the other side of the substrate is used as the sunlight receiving surface, and is attached to the wall surface of the outer wall of the building.

[0020] The transparent substrate of the ultraviolet and infrared ray shielding plate, which transmits sunlight, is preferably made of tempered glass, but may also be made of synthetic resin. [Effects of the Invention]

[0021] The present invention suppresses the temperature rise of solar panels while reducing the installation load on a building, thereby enabling efficient power generation.

[0022] The present invention effectively utilizes sunlight with wavelengths that contribute to power generation while suppressing temperature rise in solar panels, thereby achieving efficient power generation.

[0023] The present invention makes it possible to suppress deterioration of power generation efficiency due to aging and realize stable solar power generation.

[0024] The present invention facilitates the replacement of solar power generation panels installed on the outer wall surfaces of buildings, thereby realizing a longer lifespan for solar power generation devices.

[0025] Other advantages of the present invention will become more apparent from the following description of the embodiments accompanied with the accompanying drawings. [Brief explanation of the drawings]

[0026] [Figure 1] 1 is a perspective view schematically illustrating the appearance of a solar power generation system according to an embodiment of the present invention, in which solar power generation panels are installed on the surface of the outer peripheral wall of a building. [Figure 2] FIG. 1 is a perspective view showing a schematic configuration of a solar power generation panel. [Figure 3] FIG. 1 is a cross-sectional view of a solar panel. [Figure 4] FIG. 2 is a connection diagram showing an example of a connection state of a plurality of solar panels to power collector wires. [Figure 5] FIG. 1 is a partial cross-sectional view showing a solar panel and an ultraviolet / infrared shading plate attached to the outer wall of a building. [Figure 6] FIG. 1 is a cross-sectional view showing an ultraviolet and infrared ray shielding plate installed to cover a solar power generation panel. [Figure 7] FIG. 10 is a cross-sectional view showing another example of an ultraviolet and infrared ray shielding plate. [Figure 8] FIG. 10 is a cross-sectional view showing yet another example of an ultraviolet and infrared ray shielding plate. DETAILED DESCRIPTION OF THE INVENTION

[0027] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0028] 1, a photovoltaic device 1 according to this embodiment has a plurality of photovoltaic panels 4 installed on the surface of an outer wall 3 of a building 2. In this embodiment, the outer wall 3 is a wall whose surface is arranged in a substantially vertical direction and faces horizontally.

[0029] The solar power generation panel 4 installed on the outer wall 3 includes a solar power generation element 5 that can receive sunlight and generate power. In this embodiment, the solar power generation element 5 that constitutes the solar power generation panel 4 is configured as any one of a silicon-based solar power generation element, a chalcopyrite-based solar power generation element, and a perovskite-based solar power generation element. The solar power generation panel 4 includes a panel main body 7 in which a plurality of solar power generation elements 5 are arranged in parallel and in a planar manner as shown in FIG. 2 and connected by wiring 6 as shown in FIG. 3. The panel main body 7 is configured by connecting a plurality of groups in parallel, each group having a plurality of solar power generation elements 5 connected in series, in order to obtain a predetermined amount of power.

[0030] As shown in Fig. 3, the photovoltaic power generation elements 5 constituting the panel body 7 are sealed with a resin sealing layer 8 made of a transparent synthetic resin such as EAV. A transparent glass plate 9 that transmits sunlight is laminated on the light-receiving surface side of the resin sealing layer 8 where sunlight enters. A back sheet 10 is laminated on the back side of the resin sealing layer 8 as a support member.

[0031] The outer periphery of the panel body 7 is supported by a rectangular support frame 11 made of aluminum or synthetic resin, constituting the solar power generation panel 4 shown in Fig. 2. In this solar power generation panel 4, the space between the panel body 7 and the support frame 11 is filled with a filler 12 such as silicone resin to seal it. The panel body 7 also has connection terminals 13 connected to the wiring 6 that connects the solar power generation elements 5.

[0032] The solar power generation panels 4 are installed by fixing the support frames 11 to the outer peripheral wall 3, as will be described later.

[0033] As shown in the schematic diagrams of Figures 3 and 4, the solar power generation panels 4 installed on the outer wall 3 of the building 2 have power lines 16 drawn out from connection terminals 13 connected to coupling boxes 17, and then connected to collector wires 18 via the coupling boxes 17. The solar power generation panels 4 connected to the collector wires 18 are connected to a power conditioner 19 and a distribution board 20 via the collector wires 18, as shown in Figure 1, and output power to external devices.

[0034] The solar power generation panel 4 is provided with a connector on the power line 16, and is connected to a coupling box 17 via this connector.

[0035] In this embodiment, the multiple solar panels 4 installed on the outer wall 3 are combined in an appropriate number to form a string 22. The string 22 is formed by connecting multiple solar panels 4 in series, or by connecting multiple sets of solar panels 4, each of which is connected in series, in parallel to obtain the desired amount of power.

[0036] The plurality of photovoltaic panels 4 constituting the string 22 can be connected in series or in parallel by selecting a connection form to the coupling box 17.

[0037] The photovoltaic power generation panels 4 installed on the outer wall 3 of the building 2 can be selectively removed from the power collection system by removing the connectors from the coupling box 17.

[0038] The photovoltaic panels 4 connected to form the string 22 described above are installed in parallel on the surface of the outer wall 3 of the building 2 as shown in FIG.

[0039] In this embodiment, the solar power generation panels 4 are installed on the wall surface of the outer peripheral wall 3 by fixing the support frames 11 to the outer peripheral wall frames 23 that constitute the outer peripheral wall 3 of the building 2. Here, the solar power generation panels 4 are fixed to the outer peripheral wall frames 23 by being supported by connecting fittings 24 that are detachable from the outer peripheral wall frames 23, as shown in FIG. 5 . The solar power generation panels 4 can be easily removed from the outer peripheral wall 3 of the building 2 by removing the connecting fittings 24.

[0040] The photovoltaic power generation panel 4 is installed on the wall surface of the outer wall 3 of the building 2 with the light-receiving surface onto which sunlight is incident facing outward.

[0041] In this embodiment, as shown in Fig. 5, a non-flammable heat insulating material 21 is interposed between the solar power generation panel 4 and the outer peripheral surface 3 of the building 2, which is the installation surface. The heat insulating material 21 is made of glass wool. The heat insulating material 21 prevents heat from being transferred from the building 2 to the solar power generation panel 4, causing a temperature rise.

[0042] As shown in FIG. 1 , the solar light incident surface of each of the solar panels 4 constituting a string 22 installed on the wall surface of the outer wall 3 of the building 2 is entirely covered by an ultraviolet / infrared shading plate 25. As shown in FIG. 5 , the ultraviolet / infrared shading plate 25 is installed at a certain distance from the solar light incident surface of the solar panel 4 by fixing its peripheral edge to a support member 26 installed on the wall surface of the outer wall 3 of the building 2 with fixing members 27. In this case, the ultraviolet / infrared shading plate 25 is installed with an open space between the solar panels 4 and at least the lower side located on the base side of the outer wall 3 of the building 2 and the upper side located on the rooftop side. By opening the lower and upper sides of the outer wall 3 of the building 2, an air circulation space 30 is formed in which air flows above and below the solar panels 4. The air circulation space 30 prevents the temperature of the solar panels 4 from rising during operation.

[0043] The distance between the ultraviolet and infrared ray shielding plate 25 and the solar power generation panel 4 may be selected appropriately as long as it provides a space where an air flow is formed.

[0044] As shown in FIG. 6, the ultraviolet and infrared ray shielding plate 25 used in this embodiment is formed by laminating an infrared absorbing layer 32 and an ultraviolet absorbing layer 33 in this order on one surface of a tempered glass 31.

[0045] The tempered glass 31 used in this embodiment is made of a transparent material that transmits sunlight including visible light.

[0046] The infrared absorbing layer 32 and the ultraviolet absorbing layer 33 are composed mainly of an infrared absorber, an ultraviolet absorber, and a binder, and can be formed on the tempered glass 31 by a printing method such as gravure printing, offset printing, letterpress printing, flexographic printing, or silk screen printing, with additives and solvents added as necessary.

[0047] The infrared absorbing layer 32 is made of an infrared absorbing material that absorbs infrared rays contained in sunlight and reduces the infrared region of the solar spectrum, and examples of such materials include organic dyes that absorb light in the infrared region. Examples of organic dyes that can be used include polymethylene-based, phthalocyanine-based, dithiol metal complex salt-based, naphthoquinone-based, anthraquinone-based, indolephenol-based, azo-based, triarylmethane-based, immonium-based, and diimmonium-based compounds. Inorganic infrared absorbers include metal oxides such as titanium oxide, zinc oxide, indium oxide, tin oxide, and zinc sulfide.

[0048] The ultraviolet absorbing layer 33 is made of an ultraviolet absorbing material that absorbs ultraviolet rays contained in sunlight and reduces the ultraviolet region of the sunlight spectrum, and examples of such organic compounds include benzophenones, benzotriazoles, oxalic acid anilides, cyanoacrylates, salicylates, and indoles. Examples of inorganic ultraviolet absorbers include metal oxides such as zinc oxide, iron oxide, magnesium oxide, titanium oxide, tin oxide, and cerium oxide, as well as fine powders of metal oxides containing metals such as transition metals and alkaline earth metals.

[0049] A protective layer 34 made of a film of a synthetic resin such as transparent polyethylene is laminated on one surface of the tempered glass 31 on which the infrared absorbing layer 32 and the ultraviolet absorbing layer 33 are formed, in order to protect the infrared absorbing layer 32 and the ultraviolet absorbing layer 33. The protective layer 34 may be made of any material that has high transmittance for sunlight, and may be made of transparent glass.

[0050] The ultraviolet and infrared shading plate 25 is installed on the wall surface of the outer wall 3 of the building 2, with the other side opposite to the side on which the infrared absorbing layer 32 and the ultraviolet absorbing layer 33 of the tempered glass 31 are formed serving as the sunlight receiving surface L.

[0051] The ultraviolet and infrared ray shielding plate 25 used in this embodiment has an infrared absorbing layer 32 and an ultraviolet absorbing layer 33 formed in this order on one surface of the tempered glass 31. As shown in FIG. The ultraviolet absorbing layer 33 and the infrared absorbing layer 32 may be formed in this order on one surface of the tempered glass 31. The ultraviolet and infrared ray shielding plate 25 used in this embodiment also has a protective layer 34 made of a film of a transparent synthetic resin such as polyethylene laminated on one surface of the tempered glass 31 on which the ultraviolet absorbing layer 33 and the infrared absorbing layer 32 are formed.

[0052] This ultraviolet and infrared ray shielding plate 25 is also installed on the wall surface of the outer wall 3 of the building 2, with the other side opposite to the side on which the ultraviolet absorbing layer 33 and the infrared absorbing layer 32 of the tempered glass 31 are formed serving as the sunlight receiving surface L.

[0053] The external infrared ray shielding plate 25 can suppress deterioration of the infrared ray absorbing layer 32 due to ultraviolet rays by forming an ultraviolet ray absorbing layer 33 on the sunlight receiving surface side of the tempered glass 31.

[0054] By covering the entire sunlight incident surface of the solar panel 4 with the ultraviolet and infrared ray shielding plate 25, the infrared region of the sunlight spectrum is reduced, making it possible to suppress temperature rise due to infrared absorption.

[0055] The photovoltaic elements 5 constituting the photovoltaic panel 4, particularly silicon-based and chalcopyrite-based photovoltaic elements, have peak absorption in the infrared region rather than the visible light region, and therefore tend to heat up when irradiated with sunlight, reducing power generation efficiency. In this embodiment, the spectrum in the infrared region of the sunlight spectrum is reduced, making it possible to generate power without deteriorating the power generation efficiency of the photovoltaic elements 5.

[0056] In the solar power generation panel 4 used in this embodiment, the ultraviolet and infrared ray shielding plate 25 absorbs ultraviolet rays contained in sunlight, reducing the ultraviolet region of the sunlight spectrum, thereby suppressing deterioration of the sealing material that encapsulates the solar power generation elements 5 and the adhesive that joins the panel body 7 and the support frame 11. This makes it possible to extend the life of the solar power generation elements 5 of the solar power generation panel 4, and to reduce damage to the solar power generation panel 4 and achieve a longer life.

[0057] In the photovoltaic device 1 of this embodiment, the solar power generation panel 4 and the ultraviolet / infrared shading panel 25 are installed independently on the wall surface of the outer wall 3 of the building 2, so that selective replacement of the solar power generation panel 4 in response to deterioration or damage can be easily performed, thereby enabling the device itself to have a long lifespan.

[0058] In the present invention, the ultraviolet and infrared ray shielding plate 25 may have a heat conducting element carried on the protective layer 34. As shown in Fig. 8, this protective layer 34 is a synthetic resin film with a metal mesh 35 embedded therein as a heat conducting element. The ultraviolet and infrared ray shielding plate 25 used in this embodiment can suppress temperature rise due to irradiation with sunlight via the metal mesh 35.

[0059] As described above, the solar power generation device 1 according to this embodiment forms an airflow circulation space between the solar power generation panel 4 installed on the wall surface of the outer wall 3 of the building 2 and the ultraviolet and infrared ray shading plate 25 covering this solar power generation panel 4, thereby suppressing a rise in temperature of the solar power generation panel 4. This suppresses a rise in temperature of the solar power generation panel 4 while reducing the installation load on the building 2, enabling efficient power generation.

[0060] In addition, in this embodiment, the ultraviolet and infrared ray shielding plate 25 is used to suppress temperature rise due to infrared rays, while effectively utilizing sunlight with wavelengths that contribute to power generation, thereby realizing efficient power generation.

[0061] Furthermore, in this embodiment, damage to the solar power generation panel 4 caused by irradiation with ultraviolet rays is reduced, deterioration of power generation efficiency due to aging is suppressed, and stable solar power generation can be achieved.

[0062] Furthermore, in this embodiment, the photovoltaic power generation panels 4 installed on the surface of the outer wall 3 of the building 2 can be easily replaced, thereby realizing a longer lifespan of the photovoltaic power generation device. [Explanation of symbols]

[0063] 1. Solar power generation equipment 2. Building 3 Outer wall 4. Solar panels 5. Photovoltaic elements 7 Panel body 11 Support frame 25 UV / IR shielding plate 30 Air circulation space 31 Tempered Glass 32 Infrared absorbing layer 33 UV absorbing layer 34 Protective layer

Claims

1. a solar panel in which a plurality of solar power generation elements electrically connected to each other are sealed with a sealing layer; an ultraviolet and infrared shading plate that reduces the spectrum in the ultraviolet region and the spectrum in the infrared region of the solar spectrum; Equipped with The solar power generation panel is detachably attached to the outer wall of the building, The ultraviolet and infrared ray shielding plate faces the sunlight incident surface of the solar power generation panel, covers the entire sunlight incident surface, and is installed on the outer wall of the building at a distance from the solar power generation panel, thereby forming an air circulation space between the solar power generation panel and the ultraviolet and infrared ray shielding plate. A solar power generation device characterized by:

2. A solar power generation device as described in claim 1, characterized in that the solar power generation panels are installed on the wall surface of the outer wall of the building via non-flammable insulation material.

3. 2. The solar power generation system according to claim 1, wherein the ultraviolet and infrared ray shielding plate is attached to the outer peripheral wall of the building, leaving the lower and upper sides of the outer peripheral wall open.

4. The ultraviolet and infrared shading plate is formed by laminating an infrared absorbing layer that reduces the spectrum in the infrared region of the sunlight spectrum and an ultraviolet absorbing layer that reduces the spectrum in the ultraviolet region of the sunlight spectrum on one side of a transparent substrate that transmits sunlight, and further laminating a protective layer on top of that, and is attached to the wall surface of the outer wall of the building with the other side of the substrate as the sunlight receiving surface.

5. The ultraviolet and infrared shading plate is formed by laminating an ultraviolet and infrared absorbing layer that reduces the ultraviolet and infrared regions of the sunlight spectrum on one side of a transparent substrate that transmits sunlight, and further laminating a protective layer, and is attached to the wall surface of the outer wall of the building with the other side of the substrate as the sunlight receiving surface.

6. The ultraviolet and infrared shading plate is formed by laminating an ultraviolet and infrared absorbing layer that reduces the ultraviolet and infrared regions of the sunlight spectrum on one side of a transparent substrate that transmits sunlight, and further laminating a protective layer that includes a heat conduction element, and is attached to the wall surface of the outer wall of the building with the other side of the substrate as the sunlight receiving surface.

7. 7. The solar power generation device according to claim 4, wherein the transparent substrate of the ultraviolet and infrared ray shading plate that transmits sunlight is made of tempered glass.

8. 7. The solar power generation device according to claim 4, wherein the transparent substrate of the ultraviolet and infrared ray shielding plate that transmits sunlight is made of synthetic resin.

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