Bellows-type solar cell system

Abstract

To provide a vertical solar power generation system capable of suppressing the influence of wind blowing horizontally to the ground. [Solution] The accordion-type solar cell system 10 is characterized by having a solar cell panel section 12 that has multiple plate-shaped solar cell panels 13, with the surface direction of each solar cell panel 13 perpendicular to the ground and arranged so that they are in approximately a line when viewed in a plane on the ground, and a support section 14 that supports each solar cell panel 13 so that the solar cell panels 13 are arranged in a zigzag pattern so that the angle between adjacent solar cell panels 13 is a predetermined angle.

Description

[Technical Field]

[0001] The present invention relates to a bellows-type solar cell system. [Background technology]

[0002] Conventionally, solar panels have been installed in a variety of spaces. In recent years, vertical solar panels have been developed that achieve high energy efficiency even in limited spaces, increase power generation by utilizing light reflected from the ground, and are less susceptible to loss of power generation due to snow accumulation.

[0003] As a technology related to the present invention, for example, Patent Document 1 discloses a solar panel installation structure comprising two wires stretched in parallel, a plurality of solar panels supported by the two wires at both sides via fastening devices and straddling the wires, and supported so as to be movable along the direction in which the wires extend, and connecting members that foldably connect adjacent solar panels between them, and which are configured so that the solar panels can be switched between a state in which they are deployed flat between the wires and a state in which they are folded in a zigzag pattern with alternating mountain folds and valley folds.

[0004] Patent Document 2 also discloses a solar panel unit comprising: a plate-shaped panel body having a plate surface arranged in the vertical direction, one surface of the plate surface constituting an outer surface and the other surface constituting an inner surface; convex ridge portions extending in the vertical direction on the other surface of the panel body and formed in a plurality of rows so as to be aligned in a direction intersecting the vertical direction, each having an inclined surface sloping from a tip end to a base end; and solar cell sheets arranged on each inclined surface of the convex ridge portions so that their light-receiving surfaces face outward, the solar cell sheets being provided on both the inclined surfaces on one side and the other side of the convex ridge portions, with the convexity of the convex ridge portions sandwiched between them; the panel body is formed of a transparent body that can transmit sunlight; the one surface is flat; and the panel body is formed of a material that refracts sunlight so that, when a direction perpendicular to the one surface is defined as a normal incident direction, the angle φ of sunlight after passing through the one surface is smaller than the angle θ between the normal incident direction and the direction of sunlight incidence on the one surface. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent Publication No. 2021-83204 [Patent Document 2] Patent No. 7336044 Summary of the Invention [Problem to be solved by the invention]

[0006] Wind does not blow vertically from the sky toward the ground, but usually blows horizontally to the ground. In conventional vertical solar cells, multiple solar panels are installed in a straight line when viewed from above. Therefore, strong winds blowing horizontally to the ground and perpendicular to the solar panels can affect the solar panels.

[0007] An object of the present invention is to provide a vertical solar power generation system that can reduce the effects of strong winds blowing horizontally to the ground and perpendicular to the solar panel. [Means for solving the problem]

[0008] The bellows-type solar cell system according to the present invention includes a solar cell panel unit having a plurality of plate-shaped solar cell panels, the solar cell panels being arranged so that the surface direction of each solar cell panel is perpendicular to the ground and the solar cell panels are arranged in a substantially straight line in a plan view on the ground; The surfaces are facing each other Predetermined angle are arranged in a V-shaped symmetry. zigzag Forming the structure and a support portion for supporting each of the solar cell panels in such a manner that the solar cell panel portion has a predetermined gap formed therebetween to allow ventilation between adjacent solar cell panels. A set of solar cell panels arranged in a V-shape is connected in succession to form the zigzag structure. It is characterized by the presence of

[0010] Furthermore, the bellows-type solar cell system according to the present invention preferably further comprises wind power generation units provided at the predetermined intervals and generating electricity by utilizing wind blowing toward the solar cell panel units.

[0011] In the bellows-type solar cell system according to the present invention, the wind power generating unit is preferably a vertical axis wind power generating device. [Effects of the Invention]

[0012] According to the present invention, it is possible to suppress the effects of strong winds blowing horizontally to the ground and perpendicular to the solar panel. [Brief explanation of the drawings]

[0013] [Figure 1] 1 is a diagram showing a bellows-type solar cell system according to an embodiment of the present invention; [Figure 2] FIG. 10 is a diagram showing the flow of wind toward the solar panel in the bellows-type solar cell system according to the embodiment of the present invention. [Figure 3]10 is a diagram showing a modified example of a bellows-type solar cell system according to an embodiment of the present invention. [Figure 4] 1 shows a prior art vertical solar cell system. DETAILED DESCRIPTION OF THE INVENTION

[0014] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following, similar elements in all drawings will be designated by the same reference numerals, and duplicate explanations will be omitted. Furthermore, in the description below, previously described reference numerals will be used as necessary.

[0015] Fig. 1 is a diagram showing a bellows-type solar cell system 10 according to an embodiment of the present invention. Fig. 1(a) is a plan view of the bellows-type solar cell system 10, and Fig. 1(b) is a front view of the bellows-type solar cell system 10.

[0016] Figure 2 is a diagram showing the flow of wind toward the solar cell panel 13 in the bellows-type solar cell system 10 according to the embodiment of the present invention. Figure 2(a) shows the flow when the wind flows perpendicular to the plane of the gap 19 formed between adjacent solar cell panels 13, and Figure 2(b) shows the flow when the wind flows obliquely to the plane of the gap 19 formed between adjacent solar cell panels 13.

[0017] The bellows-type solar cell system 10 is a vertical solar power generation system that can suppress the effects of strong winds that blow horizontally to the ground and perpendicular to the solar cell panels. The bellows-type solar cell system 10 includes a solar cell panel unit 12, a support unit 14, and a wind power generation unit 16.

[0018] The solar cell panel unit 12 has a plurality (eight) of plate-shaped solar cell panels 13, and the surface direction of each solar cell panel 13 is perpendicular to the ground, and the solar cell panels 13 are arranged in a substantially zigzag line in a plan view on the ground, as shown in Fig. 1(a). Note that, in this description, the plurality of solar cell panels 13 is assumed to be eight, but of course, there is no limit to the number.

[0019] As shown in Fig. 1(b), the solar cell panel unit 12 has gaps 19 formed between adjacent solar cell panels 13. Here, the width of the gaps 19 will be described as being, for example, 0.5 to 1 m, but of course, this can be changed as appropriate.

[0020] The solar cell panel 13 is a device for directly converting sunlight into electrical energy and is composed of solar panels on both sides. The solar cell panel 13 is primarily made of silicon, with fine processing performed on the silicon wafer to efficiently absorb sunlight. The silicon wafer is bonded with N-type (having many electrons) and P-type (having many holes) materials with different properties. When exposed to light, electrons and holes are generated, and their movement generates an electric current. Metal conductors are arranged on the surface of the solar cell panel 13 to collect the generated electric current and supply it to an external circuit. Note that while the solar cell panel 13 has been described here as using a silicon-based solar cell as an example, it may, of course, also be a compound solar cell or an organic solar cell.

[0021] The frame of the solar panel 13 serves to support the physical structure of the solar panel itself, and is generally made of aluminum, which is lightweight, durable, and rust-resistant.

[0022] The frame of the solar panel 13 also serves to protect the solar panel itself from physical impacts and the environment, making it particularly durable against harsh weather conditions such as wind, snow, and rain. The frame of the solar panel 13 is also designed with measures against expansion and contraction due to temperature changes through the selection of materials and structural design, allowing it to maintain stable performance even over long periods of use.

[0023] The frame of the solar cell panel 13 has holes and grooves for installation, allowing various installation methods depending on the installation location. The solar cell panel 13 can also be flexibly installed on roofs, the ground, or on sloped surfaces, but here it is attached to a support 14 for installing the solar cell panel 13 vertically.

[0024] The following description will be given assuming that the surface dimensions of the solar cell panel 13 are 2 m vertically and 2 m horizontally, but this can of course be changed as appropriate. Also, as shown in Fig. 2(a), the solar cell panels 13 are arranged in a zigzag pattern so that the angle between adjacent solar cell panels 13 is a predetermined angle (100° to 160°).

[0025] The support portions 14 are support members that support the solar cell panels 13 so that the solar cell panels 13 are arranged in a zigzag pattern with the angle between adjacent solar cell panels 13 being a predetermined angle (100° to 160°).

[0026] The support parts 14 are a pair of rod-shaped members provided at both ends of the width direction of each of the eight solar cell panels 13. The length of each rod-shaped member is set to 3 m, and therefore protrudes 1 m downward from the solar cell panels 13, which have a vertical length of 2 m. As a result, when the support parts 14 are installed on the ground, the solar cell panels 13 can be set to a height of 1 m from the ground. Note that, although the length of the support parts 14 has been described as 3 m here, this can be changed as appropriate; for example, the length protruding downward from the solar cell panels 13 can be set to 1 meter or more.

[0027] The wind power generation unit 16 is provided between adjacent solar cell panels 13 and generates power by utilizing wind blowing toward the solar cell panels 13. The wind power generation unit 16 is a vertical axis wind power generation device. The wind power generation unit 16 includes a lock plate 18 that supports the adjacent solar cell panels 13, and a vertical axis wind power generation device 20 that is attached to a rotating shaft that is provided on the lock plate 18 via a bearing.

[0028] The vertical axis wind turbine generator 20 has a rotating shaft that is positioned vertically, and rotates when the wind blows. Darrieus blades are used for the rotor (rotating blades) of the vertical axis wind turbine generator 20, which efficiently generates lift in response to the wind flow. The rotation of the rotor of the vertical axis wind turbine generator 20 operates a generator, which generates electricity. The generator usually employs a direct drive system or a coreless multi-pole structure.

[0029] The vertical axis wind turbine 20 can efficiently receive wind power regardless of the direction the wind is blowing from, and thus can flexibly respond to changes in wind direction. Furthermore, the vertical axis wind turbine 20 generates less noise than other wind turbines, so it can be installed in residential areas and urban areas. Furthermore, the vertical axis wind turbine 20 can start generating power even in weak winds, so it can generate power stably regardless of wind strength. Furthermore, the vertical axis wind turbine 20 is designed to reduce bird collisions and have minimal impact on the landscape.

[0030] Various types of vertical axis wind turbines can be used as the vertical axis wind turbine 20. For example, a Darrieus wind turbine can be used, which has rotors arranged in a cylindrical shape, efficiently generates lift no matter what direction the wind is blowing from, is suitable for high-speed rotation, and can easily produce large power output.

[0031] The vertical axis wind turbine 20 may also be a Savonius wind turbine, which has alternating semi-cylindrical blades that rotate mainly by using drag and can achieve stable rotation even at low speeds. Furthermore, the vertical axis wind turbine 20 may be a hybrid wind turbine, which is designed by combining the features of the Darrieus and Savonius wind turbines and has both stability at start-up and efficiency at high speeds.

[0032] Vertical axis wind turbine generator 20 has a simple structure, is easy to maintain, and with regular inspections and proper maintenance, will provide stable performance over a long period of time. Vertical axis wind turbine generator 20 is sized so that it can be placed in gap 19 formed between adjacent solar cell panels 13, and is sized to fit into a gap that is 2 m long and 1 m wide. This size can be changed as needed.

[0033] Next, the operation of the bellows-type solar cell system 10 configured as described above will be explained. In recent years, vertical solar cell panels have been attracting attention in Europe and other places. In these vertical solar cell panels, the surface direction of the solar cell panel is perpendicular to the ground and the solar cell panel is installed in a straight line. Therefore, strong winds blowing horizontally to the ground and perpendicular to the solar cell panel can affect the solar cell panel.

[0034] For example, consider the case where the surface direction of solar panels arranged in a line is perpendicular to the wind direction as shown in Figure 4. 2 ) per 1m, the calculation is based on a wind speed of 10m / s. 2 Wind pressure per unit = 0.05 × {wind speed squared}, so when the wind speed is 10 m / s, it is 0.05 × {10 × 10} = 5 (kgf / m 2 ) wind pressure. Therefore, one panel (4m 2 ) is 20 (kgf / m 2 )

[0035] The application of such a large wind pressure can damage the solar cell panels, and there is also the problem of increased costs due to the need to reinforce the support structures and shafts that support the solar cell panels. The bellows-type solar cell system 10 of the embodiment according to the present invention exhibits remarkable effects.

[0036] In the bellows-type solar cell system 10, eight solar cell panels 13 are arranged in a zigzag pattern so that the angle between adjacent solar cell panels 13 is a predetermined angle (100° to 160°).

[0037] As a result, for example, when wind flows in a direction perpendicular to the surface direction of the gap 19 formed between adjacent solar cell panels 13, as shown in Figure 2(a), after the wind hits the solar cell panel 13, it changes direction and flows toward the gap 19 formed between the adjacent solar cell panels 13, resulting in the wind being dispersed and producing weak wind pressure.

[0038] Furthermore, when wind flows diagonally relative to the surface direction of the gap 19 formed between adjacent solar cell panels 13, as shown in Figure 2(b), after the wind hits the solar cell panel 13, it changes direction and flows toward the gap 19 formed between the adjacent solar cell panels 13, resulting in dispersion and weak wind pressure.

[0039] As described above, the bellows-type solar cell system 10 has the advantage that the wind pressure acting on the solar cell panel 13 is dispersed regardless of the direction of the wind, thereby reducing damage to the solar cell panel 13.

[0040] Furthermore, according to the bellows-type solar cell system 10, the bellows structure can disperse wind pressure, and wind is efficiently collected in the gaps 19 formed between adjacent solar cell panels 13, with the vertical axis wind power generators 20 disposed in these gaps 19. This allows power to be generated not only by the solar cell panels 13 but also by the vertical axis wind power generators 20, resulting in the remarkable effect of increasing the amount of power generation.

[0041] In the bellows-type solar cell system 10, if the width of the gap 19 formed between the adjacent solar cell panels 13 is 1 m, the height is 2 m, so the wind force of the wind area is 2 m 2 Here, wind power (W) is calculated as 1 / 2 x cross-sectional area (m 2 ) × air density (kg / m 2 )×{wind speed (m / s) 3} can be calculated using the formula:

[0042] As mentioned above, the wind power area is 2m 2 In this case, if the wind direction is directly in front of the gap 19 formed between adjacent solar cell panels 13, perpendicular to the surface direction of the gap 19, and the wind speed is 5 m / s, the wind power is calculated as follows: 1 / 2 × 2 × 1.2393 × 5 3 =161.6(W).

[0043] According to the present invention, the solar cell panels 13 are positioned on both sides of the gap 19 at a predetermined angle (100° to 160°) to each other, so that the dispersed wind gathers in the gap 19, and the area of ​​the solar cell panels 13 on both sides is about half (2 m 2 ) gathers in the gap 19, so the area of ​​the gap 19 is 2m 2 In addition, the solar panel on the left, which has an area of ​​2m, is half the area of ​​the solar panel 13. 2 In addition, the solar panel on the right has an area of ​​2m, half the area of ​​the solar panel 13. 2 is added.

[0044] This gives us wind power of 1 / 2 x 6 x 1.293 x 5 3 =484.8 (W), which is about three times the wind power compared to when the angle between adjacent solar cell panels 13 is 180°, and this has the advantage of increasing the amount of power generation.

[0045] 3 illustrates a bellows-type solar cell system 10a according to an embodiment of the present invention, which is a modified example of the bellows-type solar cell system 10 according to an embodiment of the present invention. Since the bellows-type solar cell system 10a has almost the same configuration as the bellows-type solar cell system 10, the following description will focus on the differences, and a description of the other configurations will be omitted.

[0046] In the bellows-type solar cell system 10a, solar cell panels 13 are arranged in a bellows shape. As shown in Fig. 3, eight solar cell panels 13 are arranged, but unlike the bellows-type solar cell system 10, although gaps 19a are formed between adjacent solar cell panels 13, no vertical axis wind turbine generators 20 are arranged.

[0047] According to the bellows-type solar cell system 10a, eight solar cell panels 13 are arranged in a bellows shape at a predetermined angle. Therefore, compared to a case where the solar cell panels 13 are installed straight at an angle of 180°, the second moment of area (the geometrical resistance of the material to bending) increases, just like the bellows-type solar cell system 10, making it less likely to tip over, and increasing the strength of the bellows-type solar cell system 10a.

[0048] 3(a) and 3(b), the bellows-type solar cell system 10a disperses wind and passes through the gaps 19a to the opposite side, thereby suppressing wind pressure and reducing the risk of damage to the solar cell panel 13. Furthermore, the solar cell panel 13 is installed so that its surface is perpendicular to the ground, which has the advantage of reducing the risk of collapse due to snow load even in areas with heavy snowfall such as Hokkaido. [Explanation of symbols]

[0049] 10, 10a bellows-type solar cell system, 12 solar cell panel section, 13 solar cell panel, 14 support section, 16 wind power generation section, 18 lock plate, 19, 19a gap, 20 vertical axis wind power generation device.

Claims

1. a solar cell panel unit having a plurality of plate-shaped solar cell panels, the solar cell panels being arranged so that the surface direction of each solar cell panel is perpendicular to the ground and the solar cell panels are arranged in a substantially straight line in a plan view on the ground; a support portion that supports each of the solar cell panels so that adjacent solar cell panels are arranged with their faces facing each other and in a V-shaped symmetry at a predetermined angle to form a zigzag structure; Equipped with The solar cell panel unit has a predetermined gap formed between adjacent solar cell panels to allow ventilation, A bellows-type solar cell system characterized in that a set of solar cell panels arranged in a V-shape is connected in succession to form the zigzag structure.

2. 2. The bellows-type solar cell system according to claim 1, A bellows-type solar cell system comprising wind power generation units provided at the predetermined intervals and generating electricity by utilizing wind blowing toward the solar cell panel units.

3. The bellows-type solar cell system according to claim 2, A bellows-type solar cell system, wherein the wind power generation unit is a vertical axis wind power generation device.

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