Photovoltaic power generation device

Abstract

To provide a photovoltaic power generation device which can be installed in a space-saving manner and reduces a burden of installation work.SOLUTION: A photovoltaic device (1) includes a power generation unit (13) including a base part (131) formed in a ring shape or a cylindrical shape having an axis (CL1H) extending in a first direction or in a barrel shape having a through hole (333) penetrating in the first direction, and a power generation part (132) covering at least a part of a front face of the base part (131) and generating power by irradiated sunlight (LB), and a support part (1M) supporting the power generation unit (13) and installed on an installation face (FL).SELECTED DRAWING: Figure 1A

Description

[Technical Field]

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

[0002] When installing plate-shaped solar panels on the ground or a structure, they need to be firmly installed and fixed so that they can withstand strong winds. For example, Patent Document 1 describes a solar power generation system that is strong against strong winds even when using plate-shaped solar panels.

[0003] The solar power generation system described in Patent Document 1 is said to be able to release excessive wind pressure without significantly restricting the direction of sunlight reception by supporting plate-shaped solar power generation panels at an angle of approximately 30 to 60 degrees from the horizontal. It is also said that by using bifacial solar power generation panels and providing a reflective member below the solar power generation panels that reflects sunlight and directs it toward the solar power generation panels, it is possible to prevent a deterioration in power generation efficiency. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 5043244 Summary of the Invention [Problem to be solved by the invention]

[0005] The solar power generation system described in Patent Document 1 requires a space corresponding to the size of the plate-shaped power generation panels, which are supported at an angle inclined relative to the horizontal. Therefore, the power generation panels and their support members must be strong enough to withstand not only the force acting simply in the direction of the wind blowing along the ground, but also the component forces that press the power generation panels downward and lift them upward. Therefore, the support members must be constructed and installed sturdily, which places a heavy burden on installation workers. In other words, the solar power generation system described in Patent Document 1 leaves room for improvement in terms of space-saving installation and reducing the burden of installation work.

[0006] SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a solar power generation system that can be installed in a small space and reduces the burden of installation work. [Means for solving the problem]

[0007] In order to solve the above-mentioned problems, one embodiment of the present invention has the following configuration 1). 1) A power generation unit including a base formed in a ring or cylinder shape having an axis extending in a first direction, or in a barrel shape having a through-hole penetrating in the first direction, and a power generation unit covering at least a part of the surface of the base and generating power by sunlight irradiated thereon; a support portion that supports the power generation unit and is installed on an installation surface; This is a solar power generation device equipped with the above. [Effects of the Invention]

[0008] According to one aspect of the present invention, it is possible to achieve the effect of enabling installation in a small space and reducing the burden of installation work. [Brief explanation of the drawings]

[0009] [Figure 1A] FIG. 1A is a front view showing a solar power generation device 1 according to a first aspect of an embodiment of the present invention. [Figure 1B]FIG. 1B is a side view of the solar power generation device 1. FIG. [Figure 1C] FIG. 1C is a half cross-sectional view taken along the line S1C-S1C in FIG. 1A. [Figure 2A] FIG. 2A is a front view showing a solar power generation device 2 according to a second aspect of the embodiment of the present invention. [Figure 2B] FIG. 2B is a side view of the solar power generation device 2. FIG. [Figure 2C] FIG. 2C is a cross-sectional view taken along the line S2C-S2C in FIG. 2B. [Figure 2D] FIG. 2D is a cross-sectional view showing a fin 25A which is a modified example of the fin 25 of the solar power generation device 2. As shown in FIG. [Figure 3A] FIG. 3A is a front view showing a solar power generation device 3 according to a third aspect of the embodiment of the present invention. [Figure 3B] FIG. 3B is a side view of the solar power generation device 3. [Figure 3C] FIG. 3C is a cross-sectional view taken along the line S3C-S3C in FIG. 3A. [Figure 4A] FIG. 4A is a side view showing a solar power generation device 4 according to a fourth aspect of the embodiment of the present invention. [Figure 4B] FIG. 4B is a cross-sectional view taken along the line S4B-S4B in FIG. 4A. [Figure 5] FIG. 5 is a front view showing a solar power generation device 1B which is a first modification of the solar power generation device 1 of the first embodiment. [Figure 6A] FIG. 6A is a side view illustrating the configuration of a solar power generation device 1C which is a second modification of the solar power generation device 1. FIG. [Figure 6B] FIG. 6B is a side view showing the solar power generation device 1C. [Figure 7] Figure 7 is a front view showing modified examples 3 to 5 which are modifications of the fourth embodiment, where Figure 7(a) shows a solar power generation device 4B of modified example 3, Figure 7(b) shows a solar power generation device 4C of modified example 4, and Figure 7(c) shows a solar power generation device 4D of modified example 5. [Figure 8] FIG. 10 is a front view showing a solar power generation device 4E according to a sixth modification example obtained by modifying the fourth embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0010] Embodiments of the solar power generation device of the present invention will be described with reference to FIGS. 1A to 4B, using solar power generation devices 1 to 4 according to first to fourth aspects. FIG. 1A is a front view of solar power generation device 1 according to a first aspect of the embodiment of the present invention. FIG. 1B is a side view of solar power generation device 1. FIG. 1C is a half-sectional view taken along line S1C-S1C in FIG. 1A. FIG. 2A is a front view of solar power generation device 2 according to a second aspect of the embodiment of the present invention. FIG. 2B is a side view of solar power generation device 2. FIG. 2C is a cross-sectional view taken along line S2C-S2C in FIG. 2B. FIG. 2D is a cross-sectional view of fin 25A, which is a modification of fin 25 of solar power generation device 2. FIG. 3A is a front view of solar power generation device 3 according to a third aspect of the embodiment of the present invention. FIG. 3B is a side view of solar power generation device 3. FIG. 3C is a cross-sectional view taken along line S3C-S3C in FIG. 3A. FIG. 4A is a side view of solar power generation device 4 according to a fourth aspect of the embodiment of the present invention. FIG. 4B is a cross-sectional view taken along the line S4B-S4B in FIG. 4A.

[0011] The solar power generation devices 1 to 4 of the first to fourth embodiments use perovskite solar cells in their power generation sections that receive sunlight and generate electricity. Perovskite solar cells can be manufactured by coating or printing, can be formed on optically transparent curved surfaces, and have bifacial light-receiving properties. The solar power generation devices 1 to 4 have shapes that make use of these characteristics of perovskite solar cells. In the following description, the up-down direction refers to the vertical direction.

[0012] (First aspect) As shown in FIGS. 1A to 1C, the solar power generation device 1 of the first embodiment includes an installation base 11, a support column 12, and a power generation unit 13. The installation base 11 is directly installed on an installation surface FL, such as a floor or the ground, on which the solar power generation device 1 is installed. The support column 12 is a column that is erected on the installation base 11 so as to extend in the vertical direction, and the power generation unit 13 is fixed to its upper end. The power generation unit 13 is ring-shaped with an outer diameter φ13b and a through-hole 133 with an inner diameter φ13a, and is fixed to the support column 12 at one point on the lower outer edge. For example, the solar power generation device 1 is installed such that the power generation unit 13 is oriented such that an axis CL1H of the through-hole 133 extending in a first direction extends horizontally from north to south. The installation base 11 and the support column 12 form a support portion 1M. The support column 12 is installed so as to extend in the direction of an axis CL1 in a second direction perpendicular to the axis CL1H. The axis CL1 is set in the vertical direction.

[0013] 1C, the power generation unit 13 has a ring-shaped base 131 having an annular space V1 therein. The base 131 is formed by combining a first base 131a and a second base 131b, each having a semicircular cross section, so that the cross section of the curved portion is tubular. The first base 131a and the second base 131b are made of a light-transmitting resin.

[0014] The power generation unit 13 has a power generation section 132. The power generation section 132 has an internal power generation section 132a and an external power generation section 132b. The internal power generation section 132a is formed as a perovskite solar cell by coating on the internal surface of the base 131 facing the space V1. The external power generation section 132b is formed as a perovskite solar cell by coating on the external surface of the base 131. This power generation section 132 is formed so as to cover at least a portion of the surface of the base 131.

[0015] The electrodes of the internal power generating unit 132a and the external power generating unit 132b are connected in series or in parallel and electrically connected to the output unit 11a formed on the installation base 11 through the support 12. As a result, when sunlight is irradiated onto the power generating unit 13, electricity is generated in the power generating unit 132, and power is obtained from the output unit 11a.

[0016] The power generation unit 13 has through holes 133, and the cross section of the curved portion of the base 131 is tubular, so that, as shown in Fig. 1C, of ​​the wind W blowing toward the power generation unit 13, wind Wa passes smoothly along the outside of the surface of the base 131, and wind Wb passes smoothly through the through holes 133 along the surface of the base 131. Furthermore, wind Wc blowing toward the center of the base 131 passes directly through the through holes 133. The winds Wa to Wc flow through the power generation unit 13 in roughly the same manner even if the wind direction toward the base 131 changes.

[0017] Furthermore, the component of the force applied to the power generation unit 13 by the wind Wa in a direction perpendicular to the axis CL1H is an inward component Fa toward the axis CL1H. The component of the force applied by the wind Wb in a direction perpendicular to the axis CL1H is an outward component Fb away from the axis CL1H. The component forces Fa and Fb are substantially equal in magnitude but opposite in direction, and therefore essentially cancel each other out. In other words, the force applied to the power generation unit 13 by the wind in a direction perpendicular to the axis CL1H can be substantially negligible. Therefore, the bending strength of the support 12 in a direction perpendicular to the axis CL1H can be made lower than the bending strength in a direction along the axis CL1H. In other words, the solar power generation device 1 can simplify the installation base 11 and the support 12, which are supporting members.

[0018] In this way, the force of wind that the base 131 of the power generating unit 13 receives is extremely small compared to a flat power generating panel. This eliminates the need to excessively increase the strength of the base 131 itself, simplifies the support members, and reduces the burden of installation work.

[0019] In the solar power generation device 1, the power generation unit 13 is formed into a ring shape by bending a tubular member with a circular cross section. Therefore, regardless of the position of the sun, there is a light-receiving surface where the angle between the sunlight's irradiation angle and the normal to the light-receiving surface of the external power generation unit 132b roughly matches. This makes it less susceptible to the influence of the sunlight's irradiation angle LB, making it easier to obtain a constant amount of power. Furthermore, as shown in FIG. 1C , the power generation unit 13 is preferably installed so that its axis CL1H is oriented north-south. This increases the area that receives sunlight, thereby improving power generation efficiency. Furthermore, because the power generation unit 13 is formed in a ring shape, it requires a significantly smaller installation footprint than conventional flat-plate power generation panels, enabling space-saving installation.

[0020] In the power generation unit 13, the power generation section 132 has bifacial light-receiving properties, and the base section 131 is optically transparent. As a result, as shown in Fig. 1C, depending on the angle of incidence, sunlight LB passes through the power generation section 132 four times to generate electricity: through the external surface power generation section 132b, the internal surface power generation section 132a, the internal surface power generation section 132a, and the external surface power generation section 132b. Therefore, the solar power generation device 1 has high utilization efficiency of sunlight LB.

[0021] As described above, the solar power generation device 1 of the first embodiment is subject to little wind force even though the orientation of the power generation unit 13 is fixed, so that the support members can be simplified and installation is easy. Furthermore, it can be installed in a small space, and in power generation, the utilization efficiency of the sunlight LB used for power generation is high, it is less susceptible to the influence of the angle of the sun (time of day), and a relatively stable output can be obtained regardless of the time.

[0022] (Second aspect) Next, a solar power generation device 2 of a second embodiment will be described with reference to FIGS. 2A to 2C. The solar power generation device 2 of the second embodiment includes an installation base 21, a pivot support 22, a power generation unit 23, a support shaft 24, and fins 25. The installation base 21 is directly installed on an installation surface FL such as a floor or the ground on which the solar power generation device 2 is installed. The pivot support 22 is connected to and arranged on the installation base 21, and includes a bearing that supports the support shaft 24 rotatably with respect to the fixed installation base 21. The support shaft 24 is a rod member that extends in the vertical direction with respect to the installation base 21, with an axis CL2 extending in the vertical direction as an axis, and is supported by the pivot support 22 so as to be rotatable about the axis CL2. The installation base 21, the pivot support 22, and the support shaft 24 form a support section 2M.

[0023] The power generation unit 23 is fixed to the upper side of the support shaft 24. The power generation unit 23 has a structure generally similar to that of the power generation unit 13. That is, as shown in FIG. 2C, the power generation unit 23 has a ring-shaped base 231 with an annular space V2 therein. That is, the power generation unit 23 has a through-hole 233 with an inner diameter φ23a and a ring shape with an outer diameter φ23b. The base 231 is formed by combining a first base 231a and a second base 231b, each having a semicircular cross-sectional shape, and the cross-sectional shape of the curved portion is a circular tube. The first base 231a and the second base 231b are formed of a light-transmitting resin.

[0024] The power generation unit 23 has a power generation section 232. The power generation section 232 has an internal power generation section 232a and an external power generation section 232b. The internal power generation section 232a is formed as a perovskite solar cell by coating on the internal surface of the base 231 facing the space V2. The external power generation section 232b is formed as a perovskite solar cell by coating on the external surface of the base 231. This power generation section 232 is formed so as to cover at least a portion of the surface of the base 231.

[0025] The electrodes of the internal power generating unit 232a and the external power generating unit 232b are connected in series or in parallel, and are electrically connected to the output unit 21a formed on the installation base 21 through the support shaft 24 and the rotation support 22. As a result, when sunlight is irradiated onto the power generating unit 23, electricity is generated in the power generating unit 232, and power is obtained from the output unit 21a.

[0026] The support shaft 24 is fixed to the base 231 by penetrating therethrough. As shown in Figures 2B and 2C, the fins 25 are fixed to the exposed portion of the through-hole 233 of the support shaft 24 so as to extend on a plane formed by the axis CL2H of the through-hole 233 and the axis CL2 of the support shaft 24. In this example, the shape of the fins 25 in a plan view is circular, but is not limited to a circle and may be any shape.

[0027] The winds Wa to Wc pass through the power generation units 23 of the solar power generation device 2 in the same way as the power generation unit 13 of the first embodiment, but the power generation units 23 have fins 25, and the support shafts 24 are supported by the pivot supports 22 so as to be rotatable about the axis CL2H (see arrow DR1). Therefore, the power generation units 23 naturally orient their axes CL2H along the wind direction, and follow the wind direction with the fins 25 facing downwind. This reduces the force that the power generation units 23 of the solar power generation device 2 receive from the wind, and the solar power generation device 2 can further simplify the support members, i.e., the support shafts 24, the pivot supports 22, and the installation base 21, thereby further reducing the installation burden.

[0028] Compared to solar power generation device 1, the power obtained from solar power generation device 2 does not exceed that of solar power generation device 1, even if fin 25 is made of a light-transmitting material, because part of power generation section 132 of base 131 may be in the shadow of fin 25. Therefore, as shown in FIG. 2D , fin 25A may be formed by forming fin power generation section 252, which is a perovskite solar cell, by coating on the surface of fin base 251, which serves as the base of fin 25. Fin power generation section 252 may be attached by, for example, adhering a perovskite solar cell formed in a film form to the surface of fin base 251.

[0029] When the fins 25A are used, the three power generating sections, namely the fin power generating section 252 of the fins 25A, the inner surface power generating section 232a, and the outer surface power generating section 232b of the power generating unit 23, are connected in series, parallel, or series-parallel to obtain a power output from the output section 21a. This allows the power generated by the fin power generating section 252 to be added to the power generating section 232 of the base 231, resulting in a large output. Furthermore, by forming the fin base 251 from a light-transmitting material, when sunlight LB that has passed through the fins 25A hits the power generating section 232, the power generating section 232 can also generate power, improving power generation efficiency.

[0030] The joining structure between the fin 25 or fin 25A and the support shaft 24 is, for example, as shown in FIG. 2D, a recess 251a is formed in the fin base 251, a protrusion 241 is formed in the support shaft 24, and the protrusion 241 is fitted or inserted into the recess 251a and fixed by bonding or the like.

[0031] In the solar power generation device 2, the power generation unit 23 is formed in a ring shape, with the curved portion having a circular tubular cross section. Therefore, regardless of the position of the sun, there is a light-receiving surface where the angle between the sunlight's irradiation angle and the normal to the light-receiving surface of the external power generation unit 232b roughly matches. This makes it easier to obtain a certain level of power that is less affected by the irradiation angle of sunlight LB. Furthermore, as shown in FIG. 2D , by using the fin 25A, it is possible to further improve the output by the fin power generation unit 252 of the fin 25A in addition to the power generation unit 23. Furthermore, by forming the fin base 251 of the fin 25A from a light-transmitting material, the power generation unit 232 can generate power using light that passes through the fin 25A, further improving power generation efficiency.

[0032] In the power generation unit 23, the power generation section 232 has bifacial light-receiving properties, and the base section 231 is optically transparent. As a result, as shown in Fig. 2C , depending on the angle of incidence, sunlight LB passes through the power generation section 232 four times to be used for power generation: through the external surface power generation section 232b, the internal surface power generation section 232a, the internal surface power generation section 232a, and the external surface power generation section 232b, resulting in high utilization efficiency of sunlight LB.

[0033] Furthermore, the second embodiment of the solar power generation device 2 rotates so that the orientation of the power generation unit 23 changes depending on the wind direction, and follows the wind direction in a direction that always minimizes the force received from the wind, which allows for further simplification of the support members and makes installation easier.

[0034] (Third aspect) Next, a solar power generation device 3 of a third embodiment will be described with reference to FIGS. 3A to 3C. The solar power generation device 3 of the third embodiment includes an installation base 31, a pivot support 32, a power generation unit 33, and a support shaft 34. The installation base 31 is directly installed on an installation surface FL, such as a floor or the ground, on which the solar power generation device 3 is installed. The pivot support 32 is connected to and arranged on the installation base 31, and includes a bearing that supports the support shaft 34 so that it can rotate relative to the fixed installation base 31. The support shaft 34 is a rod member that extends in the vertical direction relative to the installation base 31, with an axis CL3 extending in the vertical direction as an axis, and is supported by the pivot support 32 so that it can rotate about the axis CL3. The installation base 31, the pivot support 32, and the support shaft 34 form a support section 3M.

[0035] The power generating unit 33 is fixed to the upper part of the support shaft 34. The power generating unit 33 is formed in a barrel shape with a through hole 333. The power generating unit 33 has an outer diameter that is largest at the center in the direction of extension of the axis CL3H of the through hole 333 and the outer diameter decreases toward both ends. On the other hand, the through hole 333 has an inner diameter that is smallest at the center and the inner diameter increases toward both ends. The minimum inner diameter of the through hole 333 is an inner diameter φ33a. The maximum outer diameter of the power generating unit 33 is an outer diameter φ33b.

[0036] The support shaft 34 is fixed to one end of the power generation unit 33, penetrating the power generation unit 33 in a direction perpendicular to the axis CL3H. The solar power generation device 3 is installed on the installation surface FL in an orientation in which the axis CL3 of the support shaft 34 extends in the vertical direction and the axis CL3H is horizontal.

[0037] In the solar power generation device 3, a through hole 333 is formed in the power generation unit 33. Therefore, similar to the solar power generation devices 1 and 2, wind W blowing toward the power generation unit 33 is divided into winds Wa and Wb that flow along the outer and inner surfaces of the power generation unit 33, respectively, and wind We that passes through the center of the through hole 333, and flows smoothly. Therefore, the power generation unit 33 receives very little force from the wind. Furthermore, the support shaft 34 that supports the power generation unit 33 is fixed at a position offset from the center in the direction of the axis CL3H of the through hole 333. This allows the power generation unit 33 itself to function as the fin 25A of the solar power generation device 2 of the second embodiment. Specifically, the power generation unit 33 rotates automatically around the axis CL3 in response to changes in wind direction, so that the side to which the support shaft 34 is fixed faces upwind and the axis CL3H is aligned with the wind direction.

[0038] FIG. 3C is a cross-sectional view showing an example of the structure of the power generation unit 33. The power generation unit includes a base 331 serving as a skeleton and power generation units 332, which are perovskite solar cells formed on the outer and inner surfaces of the base 331. As shown in FIG. 3C, the base 331 is located on one side of the axis CL3H. A first base 331a, which is integrated with the support shaft 34, is combined with a second base 331b, which is located on the other side, to form a skeleton having a curved portion with a hollow, approximately elliptical tubular cross section having a space V3. The support shaft 34 is fitted or inserted into a through-hole 331d formed in the first base 331a and fixed thereto by adhesive. The first base 331a and the second base 331b are formed of a light-transmitting material. The power generation unit 332 is formed as a perovskite solar cell with bifacial light-receiving properties.

[0039] An internal power generating section 332a of the power generating section 332 is formed on the internal surface of the base 331, and an external power generating section 332b of the power generating section 332 is formed on the external surface of the base 331. The internal power generating section 332a and the external power generating section 332b are electrically connected in series or in parallel, and are connected to the output section 31a formed on the installation base 31 through the support shaft 34 and the rotation support section 32. As a result, when sunlight is irradiated onto the power generating unit 33, electricity is generated in the power generating section 332, and power is obtained from the output section 31a. The power generating section 332 is formed so as to cover at least a portion of the surface of the base 331.

[0040] In the solar power generation device 3, when the irradiation angle of sunlight LB is within a predetermined angle range, the sunlight is irradiated onto the ring-shaped power generation unit 33 so as to penetrate through the through-hole 333. Since the power generation unit 33 is formed in a barrel shape having the through-hole 333, the predetermined angle range of the sunlight LB is wide.

[0041] 3C , when sunlight LB penetrates through the through-hole 333 and irradiates the power generation unit 332, it passes through the external surface power generation unit 332b at pass point P1, the internal surface power generation unit 332a at pass point P2, the internal surface power generation unit 332a at pass point P3, and the external surface power generation unit 332b at pass point P4. It then passes through the through-hole 333, the external surface power generation unit 332b at pass point P5, the internal surface power generation unit 332a at pass point P6, the internal surface power generation unit 332a at pass point P7, and the external surface power generation unit 332b at pass point P8. In this way, sunlight LB passes through the power generation unit 332 of the power generation unit 33 up to eight times, generating electricity at the power generation unit 332 each time, further improving power generation efficiency.

[0042] In addition, in the solar power generation device 3 of the third aspect, the power generation unit 33 rotates in response to the wind direction, and follows the wind direction in a direction that minimizes the force it receives from the wind at all times. This reduces the required strength of the support members, namely the support shaft 34, the rotation support 32, and the installation base 31, making it possible to further simplify the support members and further reduce the burden of installation.

[0043] (Fourth aspect) Next, a solar power generation device 4 of a fourth embodiment will be described with reference to Figs. 4A and 4B. The solar power generation device 4 of the fourth embodiment includes an installation base 41, a pivot support 42, a power generation unit 43, and a support shaft 44. The installation base 41 is installed directly on the floor, ground, or the like on which the solar power generation device 4 is installed. The pivot support 42 is connected to and disposed on the installation base 41, and includes a bearing that supports the support shaft 44 so that it can pivot relative to the fixed installation base 41. The support shaft 44 is a rod member that extends in the vertical direction around an axis CL4 that extends in the vertical direction relative to the installation base 41, and is supported by the pivot support 42 so that it can pivot about the axis CL4. The installation base 41, the pivot support 42, and the support shaft 44 form a support part 4M.

[0044] A power generation unit 43 is fixed to the upper side of the support shaft 24. The power generation unit 43 has a through-hole 433 and is formed in a cylindrical shape with an inner diameter φ43a and an outer diameter φ43b. Specifically, as shown in FIGS. 4A and 4B , the power generation unit 43 has a cylindrical base 431 with an annular space V4 inside. The support shaft 44 is fixed to one end of the base 431 by passing through the through-hole 433. A stepped portion 431a with a slightly smaller outer diameter is formed on the outer circumferential surface of the base 431, except for the portion where the support shaft 44 is fixed and its vicinity. A cylindrical power generation unit 432 is provided in this stepped portion 431a to fill the diameter difference. The power generation unit 432 is, for example, a tubular film of a perovskite solar cell. The power generation unit 432 may be formed on the circumferential surface of the stepped portion 431a by coating so as to fill the diameter difference. The base 431 is made of a light-transmitting material, and the power generating unit 432 has light-receiving properties on both sides. The power generating unit 432 is formed so as to cover at least a part of the surface of the base 431.

[0045] 4A, one longitudinal end of the power generation unit 43 is supported by a rotatable support shaft 44, and the other end extends horizontally. As a result, the power generation unit 43 naturally rotates in accordance with the direction of wind W blowing toward the power generation unit 43 so that the other end is on the downwind side and the axis CL4H is parallel to the wind direction. In this way, in the solar power generation device 4 of the fourth embodiment, the power generation unit 43 rotates in accordance with the wind direction and follows changes in wind direction in a direction that minimizes the force it receives from the wind. This allows for further simplification of the support members, namely the support shaft 44, the rotation support 42, and the installation base 41, making installation easier.

[0046] 4B, sunlight LB irradiated onto the power generation unit 43 of the solar power generation device 4 is irradiated at a wide irradiation angle so as to penetrate through the through-hole 433 of the cylindrical power generation unit 43. That is, in most cases, sunlight LB passes through the power generation section 432 twice, sandwiching the through-hole 433, thereby improving the power generation output. Furthermore, a perovskite solar cell layer may be formed on the inner surface of the base 431 by coating or the like. In this case, sunlight LB passes through the power generation section 432 four times, sandwiching the through-hole 433, thereby increasing the output.

[0047] The embodiments of the present invention are not limited to the above-described configurations, and may be modified within the scope of the present invention.

[0048] (Variation 1) The power generation unit 13 of the solar power generation device 1 of the first embodiment is not limited to a closed ring shape, and may be a C-shape with a curved portion missing in the circumferential direction. The front view of Fig. 5 shows a solar power generation device 1B equipped with a power generation unit 13B having a missing portion 13Ba and forming a C-shape. Similarly, the power generation units 23 to 43 of the solar power generation devices 2 to 4 of the second to fourth embodiments may also have a cross-sectional shape that is a C-shape with a missing portion rather than a closed ring shape.

[0049] (Variation 2) The solar power generation device 1 of the first embodiment may be modified into the following solar power generation device 1C. That is, as shown in FIG. 6A, the solar power generation device 1C includes a power generation unit 13C having a female electrical connection portion 13Ca and a mechanical connection portion (not shown) instead of the power generation unit 13. Any number of additional power generation units 13D, which are ring-shaped like the power generation unit 13 and have a male electrical connection portion 13Cb, a female electrical connection portion 13Ca, and a mechanical connection portion (not shown), can be connected to the power generation unit 13C. FIG. 6B shows a solar power generation device 1C including a power generation unit 13G in which four additional power generation units 13D are connected to the power generation unit 13C. The output of the solar power generation device 1C can be increased depending on the number of additional power generation units 13D connected.

[0050] According to the solar power generation system 1C, the number of additional power generation units 13D connected to the power generation unit 13C can be adjusted depending on the size of the installation space and the required output, making it possible to perform installation that meets the installer's needs as much as possible.

[0051] (Variations 3 to 5) The solar power generation device 4 of the fourth embodiment may be modified as solar power generation devices 4B, 4C, and 4D, each including power generation units 43B, 43C, and 43D instead of the power generation unit 43, as modifications 3 to 5. FIG. 7 is a front view showing modifications 3 to 5 of the solar power generation device 4 of the fourth embodiment, where FIG. 7(a) shows the solar power generation device 4B of modification 3, FIG. 7(b) shows the solar power generation device 4C of modification 4, and FIG. 7(c) shows the solar power generation device 4D of modification 5. Specifically, when viewed from the front, the power generation unit 43B is elliptical, the power generation unit 43C is triangular, and the power generation unit 43D is rectangular. Of course, the front shapes are not limited to these and may be a combination of these shapes or other shapes. Furthermore, these modifications of the front shapes are not limited to modifications to the solar power generation device 4 of the fourth embodiment and may be similarly modified to the solar power generation devices 1 to 3 of the first to third embodiments.

[0052] (Variation 6) The solar power generation device 4 of the fourth embodiment may be modified to a solar power generation device 4E of Modification 6 shown in FIG. 8. The solar power generation device 4 includes a plurality of cylindrical power generation units of different diameters, arranged concentrically, for example. In the example shown in FIG. 8, three power generation units 4E1, 4E2, and 4E3 of different diameters are fixed concentrically to a support shaft 44. If the base of each of the power generation units 4E1 to 4E3 is formed from an optically transparent material and is provided with a perovskite solar cell power generation unit on its inner and outer surfaces, sunlight LB will pass through the power generation unit a maximum of 12 times, as shown in FIG. 8. Therefore, the solar power generation device 4E of Modification 6 is suitable for situations where high output is desired.

[0053] (Other variations) The through-hole 133 of the solar power generation device 1 of the first embodiment does not have to be a hole centered on the axis line CL1, and the number of through-holes 133 is not limited to one. In other words, as long as the through-hole passes through the power generation unit 13, the formation position, inner diameter, and number of through-holes are not limited.

[0054] In the power generating units 13, 23, and 43 of the first, second, and fourth embodiments, examples have been described in which the power generating section is not formed on the inner surface of the base 131, 231, 431, but the power generating section may be formed on the inner surface of each.

[0055] The power generating units 132, 232, 332, and 432 are not limited to perovskite solar cells. Any solar cell that can be formed as a thin film on a curved surface can be used. In this case, it is desirable for the solar cell to be a bifacial solar cell.

[0056] The ratios of the inner diameter φ13a to the outer diameter φ13b, the inner diameter φ23a to the outer diameter φ23b, the inner diameter φ33a to the outer diameter φ33b, and the inner diameter φ43a to the outer diameter φ43b are not limited and may be set freely. Furthermore, the lengths of the power generation units 13 to 43 in the directions of the axes CL1H to CL4H are also not limited and may be set freely.

[0057] The solar power generation devices 2 to 4 of the second to fourth aspects may be configured such that the support shafts 24, 34, 44 are fixed to the installation bases 21, 31, 41, and the power generation units 23 to 43 are supported by the support shafts 24, 34, 44 so as to be rotatable.

[0058] In the solar power generation devices 2 to 4 of the second to fourth aspects, the positions in the directions of the axes CL2H, CL3H, and CL4H at which the support shafts 24, 34, and 44 are respectively connected to the bases 231, 331, and 431 are not limited.

[0059] As described above in detail, one aspect of a solar power generation device according to an embodiment of the present invention comprises a power generation unit 13, 23, 33, 43 having a base 131, 231, 331, 431 formed in a ring or cylindrical shape with axes CL1H to CL4H in a first direction, or in a barrel shape with a through hole 333 penetrating in the first direction, a power generation section 132, 232, 332, 432 covering at least a portion of the surface of the base 131, 231, 331, 431 and generating electricity from irradiated sunlight LB, and support sections 1M, 2M, 3M, 4M supporting the power generation unit 13, 23, 33, 43 and installed on an installation surface FL.

[0060] In the above description, the ring-like, cylindrical, and barrel-like shapes include those shown as Modification 1 in which the cross-sectional shape of the base 131, 231, 331, 431 is substantially C-shaped with a portion of the circumference missing. [Explanation of symbols]

[0061] 1,2,3,4,1B,1C,4B,4C,4D,4E Solar power generation equipment 11,21,31,41 Installed base 11a,21a,31a Output section 12 pillars 22, 32, 42 Rotation support part 13, 23, 33, 43, 13B, 13C, 43B, 43C, 43D Power generating units 4E1, 4E2, 4E3 power generating units 13D Additional Power Generation Unit 131,231,331,431 Base 131a,231a,331a 1st base 131b,231b,331b 2nd base 13Ba missing part 13Ca, 13Cb electrical connection 331d through hole 431a Step 132,232,332,432 Power Generation Department 132a, 232a, 332a Internal power generating section 132b, 232b, 332b External power generation section 133,233,333,433 Through holes 24,34,44 Support shaft part 241 Convex 25,25A fins 251 Fin Base 251a Recess 252 Fin Power Generation Unit 1M,2M,3M,4M Support part CL1,CL1H,CL2,CL2H,CL3,CL3H,CL4,CL4H Axis line Fa,Fb component force FL installation surface LB solar light P1~P8 Passing points V1,V2,V3,V4 space W,Wa,Wb,Wc wind φ13a, φ23a, φ33a, φ43a Inner diameter φ13b, φ23b, φ33b, φ43b Outer diameter

Claims

1. a power generation unit including a base formed in a ring or cylinder shape having an axis extending in a first direction, or in a barrel shape having a through-hole penetrating in the first direction, and a power generation unit covering at least a portion of a surface of the base and generating power by sunlight irradiated thereon; a support portion that supports the power generation unit and is installed on an installation surface; A solar power generation device equipped with the device.

2. 2. The solar power generation system according to claim 1, wherein the power generation unit is supported so as to be rotatable about an axis extending in a second direction perpendicular to the first direction.

3. The solar power generation device according to claim 1 , wherein the base portion is optically transparent.

4. The solar power generation device according to any one of claims 1 to 3, wherein the power generation section is a perovskite solar cell formed as a membrane on the base or formed in the form of a film and attached to the base.

5. When the base is ring-shaped, the base has fins that are integral with the base and extend in the first direction and the second direction; The solar power generation device according to claim 2 , wherein the fins have a fin power generation portion on the surface thereof.

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