Solar shading power generator

Abstract

To provide a device installed on a building, which has higher power generation efficiency than conventional devices.SOLUTION: A solar shading power generator 40 installed on a building 1 comprises at least one solar shading section 41 having a circular or polygonal cross-sectional shape, and a power generation section 43 provided on at least a part of the solar shading section 41.SELECTED DRAWING: Figure 2

Description

[Technical Field]

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

[0002] A known method for reducing the amount of sunlight that penetrates into the interior of a building through its window glass is to attach a film-like solar cell to the window glass. For example, Patent Document 1 discloses a power-generating window in which solar cells are attached to the window glass. With such window glass, part of the sunlight is blocked by the solar cells, thereby reducing the amount of sunlight that penetrates into the interior of the building through the window glass. Therefore, the rise in temperature inside the building due to sunlight is reduced. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2015-151795 Summary of the Invention [Problem to be solved by the invention]

[0004] The power generation efficiency of a solar cell is highest when sunlight is incident perpendicularly to the surface of the solar cell. Therefore, in order to increase the power generation efficiency, it is necessary to take into account the position of the sun, which changes depending on the season and time of day.

[0005] However, in the power generating window described in Patent Document 1, the orientation of the solar cell is fixed, which poses a problem of unstable power generation efficiency of the solar cell.

[0006] An object of the present invention is to provide a device that is installed in a building and that generates electricity more efficiently than conventional devices. [Means for solving the problem]

[0007] In order to solve the above problems, there is provided a solar radiation-shading power generation device including at least one shading section having a circular or polygonal cross section and a power generation section provided in at least a part of the shading section. [Effects of the Invention]

[0008] According to the present invention, it is possible to provide a device that is installed in a building and has higher power generation efficiency than conventional devices. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a cross-sectional view showing a schematic configuration of a building 1. [Figure 2] 1 is a perspective view of the periphery of a window 26 of a building 1 as seen from the outside. [Figure 3] FIG. 2 is a perspective view of a solar radiation shading power generation device 40. [Figure 4] FIG. 4 is a cross-sectional view of the shielding portion 41. [Figure 5] FIG. 10 is a perspective view of the periphery of a window 26 of a building 1 in a modified example, as viewed from the outside. [Figure 6] FIG. 10 is a perspective view of the periphery of a window 26 of a building 1 in a modified example, as viewed from the outside. [Figure 7] FIG. 10 is a perspective view of the periphery of a window 26 of a building 1 in a modified example, as viewed from the outside. [Figure 8] FIG. 10 is a perspective view of the periphery of a window 26 of a building 1 in a modified example, as viewed from the outside. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, although the embodiments described below are subject to various limitations that are technically preferable for implementing the present invention, the scope of the present invention is not limited to the following embodiments and illustrated examples.

[0011] FIG. 1 is a cross-sectional view that schematically shows the configuration of a building 1 according to an embodiment of the present invention. The building 1 is, for example, an office building having multiple floors. FIG. 1 shows a cross-section of a floor 11 of the building 1. In FIG. 1, the direction in which the multiple floors 11 are stacked is the up-down direction, and the direction perpendicular to the up-down direction is the horizontal direction. The horizontal direction includes the front-to-back direction and the left-to-right direction. The direction from the inside to the outside of the building 1 is the front direction, and the direction from the outside to the inside of the building 1 is the rear direction. When viewing the building 1 from the front, the right direction is the direction toward the right, and the left direction is the direction toward the left.

[0012] Floor 11 is provided between a lower slab 21 and an upper slab 22. Floor 11 is provided between a lower floor 12 and an upper floor 13. Floor 11 is separated from the lower floor 12 by the lower slab 21. Floor 11 is also separated from the upper floor 13 by the upper slab 22.

[0013] A floor panel 23 is laid above the lower slab 21. A ceiling panel 24 is installed below the upper slab 22. The space between the floor panel 23 and the ceiling panel 24 is defined as a room 31.

[0014] On floor 11, an exterior wall 25 that is exposed to the outside air is constructed in an opening surrounded by columns and beams (neither of which is shown) constructed on the outer periphery of building 1. Exterior wall 25 is provided along the outer edges of lower slab 21 and upper slab 22. An opening 25A is formed in exterior wall 25, and a window 26 set in a window frame is installed along the edge of opening 25A. Window 26 faces the outdoors and is installed in a direction that allows sunlight to stream in (for example, facing east, southeast, south, southwest, or west).

[0015] A solar shading power generation device 40 is provided on the lower slab 21, the upper slab 22, or the exterior wall 25. In the building 1 shown in FIG. 1, the solar shading power generation device 40 is provided on the lower slab 21 and the upper slab 22. FIG. 2 is a perspective view of the periphery of a window 26 of the building 1 as seen from the outside. The solar shading power generation device 40 is provided so as to protrude forward from the exterior wall surface of the building 1 (the outer surfaces of the lower slab 21, the upper slab 22, and the exterior wall 25). The solar shading power generation device 40 is provided above the window 26.

[0016] <Solar radiation shielding power generation device> The solar radiation shading power generation device 40 is a device that blocks sunlight and generates power. The solar radiation shading power generation device 40 has a shading section 41 and a power generation section 43. FIG. 3 is a perspective view of the solar radiation shading power generation device 40 in this embodiment. The solar radiation shading power generation device 40 includes a plurality of shading sections 41, a frame 42, and a power generation section 43 provided in the shading section 41. FIG. 4 is a cross-sectional view of the shading section 41.

[0017] (shielding part) The shading portion 41 is a member that blocks sunlight. The shading portion 41 has a circular or polygonal cross-sectional shape. Here, a polygonal cross-sectional shape refers to a polygon such as a triangle or a square, or a so-called semi-cylindrical shape that combines a rectangle with a circle or an ellipse. At least one shading portion 41 is provided in the solar radiation-shading power-generating device 40. The shading portion 41 is made of metal, glass, resin, or the like. The shading portion 41 may be hollow or solid. The shading portion 41 has a certain length. The shading portion 41 is a transparent or translucent member.

[0018] As shown in Fig. 4(a), in this embodiment, the shielding portion 41 is a member having a cylindrical cross section. A plurality of shielding portions 41 are provided and arranged in parallel. The lengths of the plurality of shielding portions 41 are the same. The shielding portion 41 is a translucent member made of resin.

[0019] (Power Generation Department) The power generating unit 43 is a component that generates electricity by receiving sunlight. In other words, the power generating unit 43 is a component that converts light energy into electrical energy (power). The power generating unit 43 is provided on at least a portion of the shielding unit 41. The power generating unit 43 may be attached to the entire surface or a portion of the surface of the shielding unit 41, or may be formed of the same material as the shielding unit 41 and integrated as a part of the shielding unit 41. The power generating unit 43 is a transparent or translucent component. The power generating unit 43 is in the form of a sheet, film, or plate. Note that the power generating unit 43 is preferably flexible when the surface of the shielding unit 41 to which the power generating unit 43 is attached is curved. Furthermore, a structure in which the shielding unit 41 and the power generating unit 43 are integrated may be, for example, a sheet-like solar cell rolled into a cylindrical shape.

[0020] In this embodiment, the power generating unit 43 is provided on all of the multiple shielding units 41. As shown in FIG. 4(a), the power generating unit 43 is provided over half the circumference of the surface of each shielding unit 41. The power generating unit 43 is a solar cell. The surface area of the shielding unit 41 on which the power generating unit 43 is provided may be the upper half, or as shown in FIGS. 4(b) and 4(c), it may be the side half, or it may extend over both the upper and side areas.

[0021] The power generating unit 43 shown in Figures 4(a) to (c) is attached to a portion of the surface of the shading unit 41. The power generating unit 43, which is a solar cell, is generally expensive. Therefore, the manufacturing cost of the solar radiation shading power generating device 40 is reduced by attaching the power generating unit 43 only to a portion of the surface of the shading unit 41 that is likely to be exposed to sunlight (for example, the upper region). If reflected sunlight can be expected, the area of the power generating unit 43 can be expanded to cover the entire periphery of the surface of the shading unit 41, depending on the manufacturing cost.

[0022] The power generation unit 43 is connected to a distribution board installed in the building 1 via an inverter and a cable (neither of which is shown). The inverter converts the direct current generated by the power generation unit 43 into alternating current. The power generated by the power generation unit 43 then flows to the distribution board via the inverter. The distribution board supplies power to various pieces of equipment in the room 31. Here, the various pieces of equipment include, for example, the lighting in the room 31, electric blinds and roller blinds, an airflow system that blows air along the windows 26, and dampers that control the air flow rate through the air conditioning ducts connected to the room 31. In other words, the power generated by the power generation unit 43 is supplied to these pieces of equipment via the inverter and the distribution board. Note that the power generated by the power generation unit 43 may be used by other equipment in the building 1 (e.g., an air conditioning unit) via the distribution board. Alternatively, the power generated by the power generation unit 43 may be output (i.e., sold to an electric power company) via a power transmission line connected to the building 1.

[0023] (frame) The frame 42 is a member for fixing the multiple shading parts 41. In this embodiment, the frame 42 is a plate-shaped member. One frame 42 is attached to each end of the multiple shading parts 41 arranged in parallel. Here, the frame 42 extends in a fixed direction and is attached perpendicular to the multiple shading parts 41 of the same length. By attaching the frame 42 to the multiple shading parts 41 in this way, the solar radiation shading power generation device 40 has multiple shading parts 41 of a fixed length, as shown in FIG. 3, and the multiple shading parts 41 are arranged in parallel to form a ladder shape.

[0024] The solar radiation shading power generation device 40 can be attached freely at any angle to the building 1. For example, when the solar radiation shading power generation device 40 is attached horizontally to the building 1 as shown in FIGS. 1 and 2, it functions as a canopy.

[0025] <Modification> The solar radiation-shading power-generating device 40 may be applied by combining the modifications described below.

[0026] (1) Variation 1 The angle, direction, and position at which the solar radiation shading power generation device 40 is attached to the building 1 may be arbitrary. For example, when the solar radiation shading power generation device 40 is attached parallel to the building 1, it functions as a bamboo blind. The solar radiation shading power generation device 40 may be attached to the exterior wall surface of the building 1 so that the frame 42 extends in the left-right direction, or may be rotated 90 degrees in the horizontal plane and attached to the exterior wall surface of the building 1 so that the frame 42 extends in the front-to-back direction. FIGS. 5 to 8 are diagrams showing the solar radiation shading power generation device 40 of FIG. 3 attached in a position other than that shown in FIGS. 1 and 2.

[0027] 5 shows a state in which the solar radiation shading power generation device 40 is attached to a canopy 50 provided above a window 26. In this case, the solar radiation shading power generation device 40 is attached, for example, to the tip of the canopy 50 so that the frame 42 extends in the left-right direction and the extending direction of the shading part 41 is parallel to the up-down direction.

[0028] 6 shows a state in which the solar radiation shading power generation device 40 is attached to the side of the window 26 on the outer wall surface of the building 1. In this case, the solar radiation shading power generation device 40 is attached so that, for example, the frame 42 extends in the vertical direction and the extending direction of the shielding part 41 is parallel to the front-to-rear direction.

[0029] 7 shows a state in which the solar shading power generation device 40 is attached to the outside of the building 1 so as to cover the window 26. The solar shading power generation device 40 may also be attached to the inside of the building 1, that is, in the room 31 so as to cover the window 26. When the solar shading power generation device 40 is provided in the room 31, the solar shading power generation device 40 may be attached at any angle relative to the window 26 or a structure near the window 26. When the solar shading power generation device 40 is attached in the room 31, the solar shading power generation device 40 is not exposed to wind and rain and is therefore less likely to deteriorate.

[0030] 8 shows a state in which the solar radiation shading power generation device 40 is attached so as to cover a part of the exterior wall 25. In FIG. 8, as an example, the solar radiation shading power generation device 40 is attached so as to cover the exterior wall 25 below the window 26. Note that the solar radiation shading power generation device 40 may also be attached so as to cover the exterior wall 25 above or to the side of the window 26. The solar radiation shading power generation device 40 may also be attached to the roof of the building 1.

[0031] By attaching the solar shading power generation device 40 so that it covers a portion of the exterior wall 25 or is attached to the roof of the building 1, some of the sunlight that would otherwise be incident on the exterior wall 25 or the roof of the building 1 is incident on the solar shading power generation device 40. Therefore, because some of the sunlight that would otherwise be incident on the exterior wall 25 or the roof of the building 1 is blocked by the solar shading power generation device 40, the amount of sunlight that is incident on the exterior wall 25 or the roof of the building 1 is reduced. As a result, the temperature rise of the exterior wall 25 and the building 1 due to sunlight is mitigated.

[0032] <Effects> (Aspect 1) In this embodiment, the solar radiation-shading power generation device 40 includes at least one shading section 41 having a circular or polygonal cross section, and a power generation section 43 provided in at least a part of the shading section 41.

[0033] When the solar radiation shading power generation device 40 described above is installed in a building 1, the shading portion 41 can block sunlight irradiating the building 1. Furthermore, since the power generation unit 43 is provided in the shading portion 41, the solar radiation shading power generation device 40 can generate power while blocking sunlight. Furthermore, since the cross-sectional shape of the shading portion 41 is circular or polygonal, even if the position of the sun changes depending on the season and time, some part of the power generation unit 43 provided in the shading portion 41 is likely to be in a position directly facing the sun, which is the state with the highest power generation efficiency. Therefore, the power generation efficiency of the power generation unit 43 is higher than when it is fixed to a vertical or horizontal surface. From the above, it is possible to provide a device that can be installed in a building and has higher power generation efficiency than conventional devices.

[0034] (Embodiment 2) In embodiment 1, the solar radiation shading power generating device 40 has a plurality of shading parts 41 each having a certain length, and the shading parts 41 are arranged in parallel to form a ladder shape.

[0035] The solar radiation shading power generation device 40 described above is configured in a ladder shape with multiple shading sections 41 of a certain length arranged in parallel, so there are gaps between adjacent shading sections 41. Therefore, even when the solar radiation shading power generation device 40 is installed near or in front of the window 26, it is easy to ensure a view of the window 26.

[0036] Furthermore, the solar radiation shading power generation device 40 can allow sunlight to pass through appropriately by adjusting the spacing between adjacent shading portions 41 and the size of the shading portions 41.

[0037] Furthermore, by providing a plurality of shading parts 41, the solar radiation shading power generation device 40 can have a plurality of power generation parts 43 attached to the shading parts 41. As a result, the solar radiation shading power generation device 40 can generate more electricity.

[0038] (Embodiment 3) In embodiment 1 or 2, the shielding portion 41 is cylindrical.

[0039] In the solar radiation shading power generation device 40 described above, the shading part 41 is cylindrical, so the amount of material required to manufacture the shading part 41 is less than when manufacturing a solid member. As a result, the manufacturing cost of the shading part 41 is reduced.

[0040] Furthermore, when the shading portion 41 is cylindrical, the shading portion 41 is lighter than a solid member. As a result, the solar radiation shading power generation device 40 is lightweight, and a small, simplified structure can be used when attaching the solar radiation shading power generation device 40 to the building 1. Therefore, the solar radiation shading power generation device 40 can be easily attached to the building 1.

[0041] (Embodiment 4) In any of Embodiments 1 to 3, at least one of the shielding section 41 and the power generating section 43 is semi-transparent.

[0042] In the above-described solar radiation shading power generation device 40, at least one of the shading portion 41 and the power generation portion 43 is translucent, so that part of the sunlight passes through either or both of the shading portion 41 and the power generation portion 43. The sunlight that passes through either or both of the shading portion 41 and the power generation portion 43 illuminates the room 31 through the window 26. Here, the sunlight that enters the window 26 has less light energy than sunlight that enters the window 26 directly. Therefore, the solar radiation shading power generation device 40 can appropriately block sunlight that enters the window 26. [Explanation of symbols]

[0043] 40...Solar radiation shielding power generation device 41...Shielding part 43...Power generation section

Claims

1. At least one shielding portion having a circular or polygonal cross-sectional shape; a power generating unit provided at least in a part of the shielding unit; A solar radiation shading power generation device comprising:

2. The solar radiation-shading power-generating device has a plurality of the shading portions each having a certain length, A plurality of the shielding portions are arranged in parallel to form a ladder shape. The solar radiation-shielding power generation device according to claim 1.

3. The solar radiation-shading power generation device according to claim 1 , wherein the shielding portion is cylindrical.

4. The solar radiation-shading power-generating device according to claim 1 , wherein at least one of the shielding section and the power-generating section is semi-transparent.

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