Solar power generation equipment

Abstract

To obtain a photovoltaic power generation device that can restrain an increase in the temperature of a solar panel when the solar panel is retracted.SOLUTION: Provided is a photovoltaic power generation device 20 including: a solar panel 22, one surface of the solar panel being a light receiving surface 24 that is capable of receiving solar light, the other surface of the solar panel being a light reflecting surface 26 that is capable of reflecting solar light; and a support body 10 that supports the solar panel 22 such that the solar panel can be expanded and retracted. The solar panel 22 is retracted in an attitude in which the light receiving surface 24 faces the support body 10.SELECTED DRAWING: Figure 4

Description

[Technical field]

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

[0002] A solar power generation device that can increase the amount of power generated by increasing the ratio of solar panels to the mobile body has been proposed in the past (see Patent Document 1). This solar panel has a main panel attached to the surface of the roof of the mobile body, and sub-panels are attached to both the left and right sides of the main panel via hinges so that they can be opened and closed. When in use, the sub-panels are configured to expand outward to the left and right, doubling the power generation area. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-075192 Summary of the Invention [Problem to be solved by the invention]

[0004] However, depending on how the solar panel is stored, such as by folding it, there is a risk that it may not be able to radiate and dissipate sufficient heat due to the heat received from sunlight. In this case, the temperature of the stored solar panel may rise and exceed the heat resistance range of the panel base material.

[0005] SUMMARY OF THE PRESENT DISCLOSURE An object of the present invention is to provide a solar power generation device capable of suppressing a rise in temperature of a solar panel when stored. [Means for solving the problem]

[0006] In order to achieve the above object, the present invention No. 1 Aspects ofThis solar power generation device comprises a solar panel having one surface that is a light receiving surface capable of receiving sunlight and the other surface that is a reflecting surface that is capable of reflecting sunlight, and a support body that supports the solar panel so that it can be deployed and stored, and the solar panel is stored in a position with the light receiving surface facing the support body.

[0007] No. 1 Aspects of According to the invention, the solar panel is stored with the light receiving surface facing the support body. In other words, the solar panel is stored with the reflective surface facing the outside of the support body. Therefore, the heat of the solar panel when stored is efficiently dissipated from the reflective surface, and the temperature rise of the solar panel is suppressed.

[0008] Also, The present invention relates to 2 Aspects of The solar power generation equipment is No. 1 Aspects of In the solar power generation device, the support is a moving body.

[0009] No. 2 Aspects of According to the invention, the support is a movable body. Therefore, it is easier to face the solar panel toward the sun than when the support is fixed. In other words, the solar panel can receive sunlight efficiently and generate electricity efficiently.

[0010] Also, The present invention relates to 3 Aspects of The solar power generation equipment is No. 2 Aspects of In this solar power generation device, the solar panel is rotatably mounted on the side of the moving body with the vertical direction as the axial direction, and selectively adopts a stored position in which the light receiving surface faces the side, and a deployed position in which the light receiving surface faces in the fore-aft direction of the moving body.

[0011] No. 3 Aspects ofAccording to this invention, when the solar panel is in the stored position, its light receiving surface faces the side surface of the moving body. In other words, the reflective surface of the solar panel faces outward from the side surface of the moving body. This suppresses the temperature rise of the moving body. Also, when the solar panel is in the deployed position, its light receiving surface faces the front-to-rear direction of the moving body. This suppresses the reduction in the light receiving surface of the solar panel due to the shadow of the moving body. This suppresses the decrease in the power generation (light receiving) efficiency of the solar panel.

[0012] Also, The present invention relates to 4 Aspects of The solar power generation equipment is No. 3 Aspects of In the solar power generation device, the solar panel is made up of multiple panels, and when in the deployed position, it slides upward and is extended.

[0013] No. 4 Aspects of According to the invention, the solar panel is made up of multiple panels, and in the deployed position, it slides upward and is extended. In other words, the power generation (light receiving) area of ​​the solar panel is expanded. Therefore, the amount of power generation is efficiently increased.

[0014] Also, The present invention relates to 5 Aspects of The solar power generation equipment is No. 4 Aspects of In the solar power generation device, functional components are fixed to a top surface of the moving body, and the solar panel extends upward to avoid the functional components.

[0015] No. 5 Aspects of According to the invention, the solar panel extends upward to avoid the functional parts fixed to the top surface of the moving body, so there is no risk of the solar panel impairing the function of the functional parts. Effect of the Invention

[0016] As described above, according to the present invention, it is possible to suppress the temperature rise of the solar panel when it is stored. [Brief description of the drawings]

[0017] [Figure 1] 1 is a schematic perspective view showing a moving body constituting a solar power generation device according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a schematic front view showing the deployed posture of the solar panel according to the present embodiment. [Diagram 3] FIG. 2 is a schematic plan view showing the deployed posture of the solar panel according to the present embodiment. [Figure 4] FIG. 2 is a schematic front view showing a storage posture of the solar panel according to the embodiment. [Diagram 5] FIG. 2 is a schematic side view showing the solar panel according to the embodiment in the middle of being deployed. [Figure 6] FIG. 1A is a schematic rear view showing the stored posture of the solar panel according to the embodiment, and FIG. 1B is a table showing the temperature results of each panel constituting the solar panel according to the embodiment. [Figure 7] 1A is a schematic side view showing a solar panel according to a reference example at the start of deployment, FIG. 1B is a schematic side view showing a solar panel according to a reference example in the middle of deployment, and FIG. 1C is a schematic side view showing a solar panel according to a reference example after deployment is completed. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. For convenience of explanation, the arrow UP shown appropriately in each figure indicates the upward direction of the moving body 10, the arrow FR indicates the forward direction of the moving body 10, the arrow LH indicates the leftward direction of the moving body 10, and the arrow RH indicates the rightward direction of the moving body 10. Therefore, in the following explanation, when the directions of up / down, front / rear, and left / right are described without special mention, they refer to up / down, front / rear, and left / right of the moving body 10. Furthermore, the left / right direction is synonymous with the vehicle width direction of the moving body 10. Furthermore, the outline arrows shown appropriately in each figure represent the sun's rays.

[0019] 1 to 3, a moving body 10 as an example of a support constituting a solar power generation device 20 according to this embodiment is a vehicle used mainly on the surface of a planet with a thin atmosphere, such as the surface of the moon or the surface of Mars, other than the earth, and specifically, a rover that travels and explores the surface of the moon, etc. The moving body 10 includes a pressurized cabin 12 that constitutes a vehicle compartment in which a passenger sits, and a pair of wheels 14 provided on the left and right sides of the front and rear lower parts of the cabin 12.

[0020] A radiator 16 as an example of a functional part and an antenna 18 (see FIG. 1) as an example of a functional part are provided on a top surface (roof) 12U of the cabin 12. The radiator 16 has a main panel 16M fixed to the front side of the top surface 12U of the cabin 12 (a predetermined portion slightly rearward of the front end portion of the top surface 12U), and the main panel 16M is formed in a rectangular shape in a plan view.

[0021] The radiator 16 also has sub-panels 16S rotatably supported on both the left and right sides of the main panel 16M by hinge portions 17. That is, on both the left and right ends of the main panel 16M, shaft portions 17A constituting the hinge portions 17 are provided with their axial direction extending in the front-to-rear direction, and the inner end portion of the sub-panel 16S formed in a rectangular shape in a plan view is rotatably supported by the shaft portions 17A.

[0022] The length of the main panel 16M in the front-rear direction is equal to the length of the sub-panel 16S in the front-rear direction. The length of the main panel 16M in the left-right direction is equal to the length of the cabin 12 in the left-right direction (vehicle width). The length of the sub-panel 16S in the left-right direction is about half the length of the main panel 16M in the left-right direction. In other words, the length of the radiator 16 in the left-right direction when the sub-panel 16S is deployed is configured to be about twice the length of the cabin 12 in the left-right direction, so that the heat dissipation effect of the radiator 16 can be sufficiently obtained.

[0023] 1, antenna 18 is fixed to the rear side of top surface 12U of cabin 12, and is located rearward of radiator 16. Antenna 18 has a main body 18A in the shape of a circular curved plate and a support portion 18B that supports main body 18A, and support portion 18B is fixed to top surface 12U of cabin 12. Antenna 18 is disposed so as not to interfere with rotation of sub-panel 16S of radiator 16.

[0024] As shown in Figs. 1 to 5, a solar panel 22 constituting a solar power generation device 20 is provided on one (e.g., the left) side surface 12S of the cabin 12 (mobile body 10) so as to be deployable and retractable. The solar panel 22 is made up of a plurality of (e.g., three) panels, and each panel is formed in a rectangular shape with the longitudinal direction extending in the front-rear direction in a stored position described later. In a deployed position described later, two of the three panels are each slid upward in turn to be extended.

[0025] Specifically, in the stored position, the solar panel 22 has, in that order from the inside to the outside in the vehicle width direction, an inner panel 22A that is not slid and is positioned in a lower position, a middle panel 22B that is slid upward relative to the inner panel 22A and is positioned in an intermediate position, and an outer panel 22C that is slid upward relative to the middle panel 22B and is positioned in an upper position.

[0026] The middle panel 22B is configured to be slidable upward relative to the inner panel 22A by a known mechanism (e.g., a rack and pinion, a wire, a gear, etc.) that is driven by an operation of an occupant in the cabin 12. The outer panel 22C is also configured to be slidable upward relative to the middle panel 22B by a known mechanism that is driven by an operation of an occupant in the cabin 12.

[0027] Moreover, one surface of this solar panel 22 is a light-receiving surface 24 capable of receiving sunlight, and the other surface is a reflecting surface 26 capable of reflecting sunlight. That is, one surface (front surface) of the solar panel 22 is the light-receiving surface 24 made up of a plurality of power-generating cell surfaces, and the other surface (back surface) of the solar panel 22 is the reflecting surface 26 that is painted white or has a fluororesin film with silver vapor deposition attached thereto.

[0028] This solar panel 22 is configured to be capable of selectively adopting a stored position in which the light receiving surface 24 faces the side surface 12S of the cabin 12, and a deployed position in which the light receiving surface 24 faces the rear side (front-rear direction) of the cabin 12 (mobile body 10). More specifically, one longitudinal end of the inner panel 22A is rotatably supported by a shaft 28 provided at the front end of the side surface 12S of the cabin 12 and having an axial direction extending in the up-down direction.

[0029] Therefore, this solar panel 22 can rotate around the axis 28 by a known mechanism that is driven by the operation of an occupant inside the cabin 12, thereby being able to adopt a stored position in which it is positioned along the side surface 12S of the cabin 12, and a deployed position in which it is positioned at a 90 degree angle to the side surface 12S of the cabin 12 in a planar view.

[0030] In addition, since this solar panel 22 takes the deployed position at the front end of the side surface 12S of the cabin 12, when the middle panel 22B and the outer panel 22C slide upward, they do not interfere with the deployed radiator 16 located slightly rearward of the front end of the top surface 12U of the cabin 12. In other words, the solar panel 22 supported in a deployable and storable manner in the cabin 12 (mobile body 10) is configured to be extendable upward while avoiding functional components such as the radiator 16.

[0031] Next, the operation of the solar power generation device 20 according to this embodiment configured as above will be described.

[0032] The solar panel 22 stored on the side surface 12S of the moving body 10 (cabin 12) rotates forward about the shaft 28 to adopt a deployed posture in which the light receiving surface 24 faces the rear side of the moving body 10 (cabin 12). In this state, the middle panel 22B and the outer panel 22C are slid upward to expand the power generation (light receiving) area of ​​the solar panel 22. Therefore, the amount of power generation can be increased efficiently.

[0033] Furthermore, with the solar panel 22 of this embodiment, there is no risk of the functionality of the functional components provided on the moving body 10 (cabin 12) being impaired, compared to, for example, a case in which the solar panel 22 is fixed to the side surface 12S of the moving body 10 (cabin 12) with the light receiving surface 24 facing outward and the middle panel 22B and the outer panel 22C slide upward in this state.

[0034] That is, when the middle panel 22B and the outer panel 22C of the solar panel 22 are slid (extended) upward, the middle panel 22B and the outer panel 22C are slid upward avoiding the radiator 16. Therefore, it is not necessary to reduce the heat dissipation area of ​​the radiator 16. In addition, since the solar panel 22 is disposed away from the antenna 18, there is no risk of blocking radio waves received by the antenna 18.

[0035] Furthermore, the solar panel 22 according to this embodiment can prevent the occurrence of a problem such as an increase in the temperature inside the cabin 12 due to heat received from sunlight received by the solar panel 22 fixed to the side surface 12S of the moving body 10 (cabin 12). Furthermore, if a window portion (not shown) is provided on the side surface 12S of the cabin 12, there is no risk that the solar panel 22 will block the view of the occupants inside the cabin 12 from the window portion.

[0036] Furthermore, if the support that supports the solar panel 22 is a mobile body 10 that travels on a planet with a thin atmosphere, such as the surface of the moon or the surface of Mars, it is easier to keep the light receiving surface 24 of the solar panel 22 facing the sun at all times compared to when the support is fixed. Therefore, sunlight can be received efficiently and electricity can be generated efficiently.

[0037] Furthermore, when the solar panel 22 rotates forward to assume the deployed position, it is disposed at an angle of 90 degrees in a plan view with respect to the side surface 12S of the cabin 12. Therefore, there is no obstruction in the direction in which the light-receiving surface 24 faces, and sunlight is efficiently received by the light-receiving surface 24. In other words, the power generation (light-receiving) efficiency of the solar panel 22 can be improved.

[0038] In other words, when the solar panel 22 is arranged at an angle of 90 degrees in a plan view with respect to the side surface 12S of the cabin 12, it is possible to suppress or prevent the light receiving surface 24 from being reduced by the shadow of the cabin 12. Therefore, it is possible to suppress or prevent a decrease in the power generation (light receiving) efficiency of the solar panel 22.

[0039] On the other hand, when the solar panel 22 in the deployed position in which the outer panel 22C and the middle panel 22B are lowered and overlapped on the inner panel 22A rotates rearward about the axis 28 to assume the stored position, the solar panel 22 faces its light receiving surface 24 to the side surface 12S of the cabin 12. In other words, the solar panel 22 is stored in a position in which the reflective surface 26 faces outward from the side surface 12S of the cabin 12.

[0040] Therefore, the heat of the solar panel 22 when stored can be efficiently dissipated from the reflective surface 26, and the temperature rise of the solar panel 22 can be suppressed, as well as the temperature rise inside the cabin 12. This can reduce the possibility that the heat resistance range of the panel base material of the lightweight and inexpensive solar panel 22 will be exceeded.

[0041] 6 shows the results of a simulation of temperature changes of the solar panels 22 (inner panel 22A, middle panel 22B, outer panel 22C) at a lunar surface temperature of 100°C. The heat resistance temperature of each panel base material constituting the inner panel 22A, middle panel 22B, and outer panel 22C of the solar panel 22 is up to 120°C.

[0042] 6(A), a white paint W (schematically shown as a rectangle) is applied to the back surfaces of the inner panel 22A, the middle panel 22B, and the outer panel 22C of the solar panel 22. That is, FIG. 6(A) shows the inner panel 22A, the middle panel 22B, and the outer panel 22C of the solar panel 22 stored with their respective reflective surfaces 26 facing outward from the side surface 12S of the cabin 12.

[0043] Figure 6(B) shows a comparative example in which, when the solar panel 22 is in the stored position, each of the light receiving surfaces 24 of the inner panel 22A, middle panel 22B, and outer panel 22C faces outward (each of the reflective surfaces 26 faces inward), and an example in which each of the light receiving surfaces 24 of the inner panel 22A, middle panel 22B, and outer panel 22C faces inward (each of the reflective surfaces 26 faces outward).

[0044] 6(B), the temperature rise is suppressed in the inner panel 22A, middle panel 22B, and outer panel 22C of the solar panel 22 in the example compared to the inner panel 22A, middle panel 22B, and outer panel 22C of the solar panel 22 in the comparative example. Moreover, the maximum temperature of the solar panel 22 in the example is 199°C for the inner panel 22A, which is below the heat resistance temperature of the panel base material of 120°C. In this way, the solar power generation device 20 according to this embodiment can reduce the possibility of exceeding the heat resistance temperature range of the panel base material of the solar panel 22.

[0045] (Reference example) The middle panel 22B and the outer panel 22C of the solar panel 22 are not limited to a sliding type that slides upward. For example, as shown in Fig. 7(A), the upper end of the middle panel 22B and the lower end of the outer panel 22C (the lower end when extended upward as shown in Fig. 7(C)) may be a rotating type that is rotatably connected by an axis part 22D whose axial direction is the longitudinal direction of the middle panel 22B and the outer panel 22C.

[0046] In such a pivotable solar panel 22, as shown in Fig. 7(B), the outer panel 22C pivots about the axis 22D as the middle panel 22B slides upward, so that the solar panel 22 can be extended as shown in Fig. 7(C). In the case of such a pivotable solar panel 22, when the solar panel 22 is in the stored position, only the outer panel 22C has the light receiving surface 24 facing outward. For this reason, the above-mentioned sliding type solar panel 22 is preferable.

[0047] Although the solar power generation device 20 according to the present embodiment has been described above with reference to the drawings, the solar power generation device 20 according to the present embodiment is not limited to the illustrated one, and the design can be appropriately modified within the scope of the gist of the present invention. For example, if the solar panel 22 is made of a flexible panel base material, it may be of a winding type that extends upward when unwound.

[0048] Furthermore, the support is not limited to the moving body 10, but may be one fixed at a predetermined position. Furthermore, the moving body 10 is not limited to a vehicle used on the surface of the moon, but may be, for example, a vehicle such as a trailer equipped with a living space. In other words, the solar power generation device 20 according to this embodiment can also be applied to vehicles used on the Earth.

[0049] Moreover, the functional parts provided on the top surface 12U of the cabin 12 are not limited to the radiator 16 and the antenna 18. The functional parts in this embodiment include general functional parts that are offset in the front-rear direction with respect to the solar panel 22 in the deployed position so as not to impede the upward extension of the middle panel 22B and the outer panel 22C of the solar panel 22. [Explanation of symbols]

[0050] 10 Moving body (support) 16 Radiator (functional part) 20. Solar power generation equipment 22 Solar Panels 24 Photosensitive surface 26 Reflective surface

Claims

1. A solar panel having one surface serving as a light receiving surface capable of receiving sunlight and the other surface serving as a reflecting surface capable of reflecting sunlight; A movable body that supports the solar panel so that the solar panel can be deployed and stored; Equipped with The solar panel is rotatably mounted on the side of the moving body with the vertical direction as the axial direction, and is a solar power generation device that selectively adopts a stored position in which the light receiving surface faces the side, and a deployed position in which the light receiving surface faces in the fore-aft direction of the moving body.

2. The photovoltaic power generation device according to claim 1 , wherein the solar panel is made up of a plurality of solar panels, and is extended by sliding upward in the deployed position.

3. A functional part is fixed to the top surface of the moving body, The photovoltaic power generation device according to claim 2 , wherein the solar panel extends upward to avoid the functional components.

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