JP2004186437A - Generator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a generator capable of reducing the usage of a solar cell by using a double-sided generation type solar cell, and improving generating efficiency by effectively irradiating even the back side of the solar cell with lights. <P>SOLUTION: This generator is provided with a generating part 20 where a light transmitting part 25 is arranged between face-shaped double-sided generation type solar cells 21 and a reflecting part 40 arranged on the back side of the generating part 20 with the surface as a reflecting face 41. The reflecting face 41 of the reflecting part 40 is faced to the back face so as to be shaped like a projecting curved surface. Then, reflecting lights made incident from the light transmitting part 25 of the generating part 20, and reflected on the reflecting surface 41 are converged, and emitted to the solar cell 21 at the back side of the generating part 20. The reflected lights are converged so that the quantity of the reflected lights to be emitted to the back face of the solar cell 20 can be increased, that the generation quantity can be increased, and that the efficient use of the solar cell can be attained. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a power generation device using a double-sided power generation type solar cell.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a power generation device using a solar cell is used as a power generation device using natural clean light energy, or as a power supply device in a remote place or a place without power supply facilities.
[0003]
On the other hand, as a solar cell, a double-sided power generation type solar cell that generates power by light incident on the back side in addition to power generation by light incident on the front side has been put to practical use. This type of power generation device using a dual-sided power generation type solar cell, for example, a flat reflector is installed on the back side of a flat solar cell, and the light radiated to the front side of the solar cell is reflected by the reflector. It was configured to generate power by the reflected light that was reflected and applied to the back side of the solar cell. The use of a dual-sided solar cell is preferable because the amount of the solar cell used can be reduced, the manufacturing cost can be reduced, and the installation area can be reduced.
[0004]
However, in the above-described conventional power generation device, the amount of light irradiation on the back surface of the solar cell by the reflector is not always sufficient, and further improvement in power generation efficiency has been desired.
[0005]
[Problems to be solved by the invention]
The present invention has been made in view of the above points, and its object is to reduce the amount of solar cells used by using a dual-sided power generation type solar cell, and at the same time, to effectively emit light to the back side of the solar cell. An object of the present invention is to provide a power generation device that can improve power generation efficiency by irradiation.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the invention according to claim 1 of the present application provides a power generation unit in which a light passing unit is provided between planar two-sided power generation solar cells and a rear surface side of the power generation unit. A reflecting portion having a surface as a reflecting surface, wherein the reflecting surface of the reflecting portion is formed into a curved surface shape convex toward the back surface or a polyhedral shape convex toward the back surface, whereby the power generation is performed. The power generation device is characterized in that the reflected light that has entered from the light passing portion of the portion and reflected on the reflection surface is condensed, and then is radiated to the solar cell on the back surface side of the power generation portion. According to this power generation device, the reflected light incident from the light passing portion of the power generation unit and reflected by the reflection surface is collected, so that the amount of reflected light applied to the back surface of the solar cell can be increased and the power generation amount can be increased. In addition, efficient use of solar cells can be achieved. In other words, the dual-sided power generation type solar cell can be effectively used, the usage of the solar cell can be reduced, and the power generation device can be downsized.
[0007]
The invention according to claim 2 of the present application is characterized in that the solar cell of the power generation unit is formed in a curved surface shape convex toward the surface or a polyhedral shape convex toward the surface. Item 1 is the power generator according to Item 1. According to the present invention, the amount of light applied to the surface of the solar cell increases, and the amount of power generated by the solar cell increases.
[0008]
According to the invention of claim 3 of the present application, by installing a brim-shaped reflector on the outer periphery of the power generation device, a part of the light reflected by the reflector is radiated to the solar cell on the surface side of the power generation unit. The power generator according to claim 1 or 2, wherein the power generation is performed. According to the present invention, the power generation of the solar cell can be more effectively performed by the reflection plate provided on the outer periphery of the power generation device.
[0009]
The invention according to claim 4 of the present application is characterized in that the power generation device is mounted so as to surround an outer periphery of a column that supports the power generation device. It is in. ADVANTAGE OF THE INVENTION According to this invention, the dimension which a power generator protrudes outward from the support | pillar which supports this can be made small, and even if an obstruction such as a building is installed close to the support, it is mounted. Can be.
[0010]
The invention according to claim 5 of the present application is the power generator according to claim 4, wherein a wind power generator is installed on the support. According to the present invention, the power generation device according to the present invention can be installed in a small installation area on the support for the wind power generation device, and the entire hybrid power generation device can be made compact.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a schematic perspective view showing a hybrid power generator 1 in which a wind power generator 80 is combined with a power generator 10 according to one embodiment of the present invention. In the hybrid power generator 1 shown in the figure, a wind power generator 80 is installed above a support 70, and a power generator 10 using a solar cell is installed in the middle of the support 70, and power is generated by the power generator 10 and the wind power generator 80. It is configured to supply electricity to the power storage device 90 and the inverter 95. Hereinafter, each component will be described.
[0012]
The wind power generator 80 is a vertical axis wind power generator, in which a plurality of vertically oriented wings 81 are attached to the vertical axis installed inside the support 70 by the arm 83, and the generator installed inside the support 70 by the vertical axis is used. It is configured to be driven. This vertical axis type wind power generator 80 is a wind power generator capable of generating power without depending on the wind direction.
[0013]
Next, FIG. 2 is a diagram showing the power generator 10, FIG. 2 (a) is a schematic plan view, and FIG. 2 (b) is a schematic cross-sectional view along AA in FIG. 2 (a). As shown in the figure, the power generation device 10 is attached in a substantially disk shape around a support column 70, and includes a power generation unit 20 on an upper surface side and a reflection unit 40 on a lower surface side.
[0014]
The power generation unit 20 includes a plurality (five) of solar cells 21 arranged in a plane and a plurality (five) of light passing units 25 including openings provided between the respective solar cells 21. It is configured. Here, each of the five solar cells 21 is a planar two-sided power generation type solar cell that generates electric power by light incident on the front and back surfaces, and has a curved surface that is convex toward the surface of the entire five solar cells 21 (this embodiment). In the form of a spherical surface). Each of the solar cells 21 and each of the light passing portions 25 of the power generation unit 20 are alternately formed in a plurality (10) of regions divided at equal intervals by a line extending radially from the center of the power generation unit 20 (the column 70). Is provided.
[0015]
The reflecting portion 40 has a curved reflecting surface 41 (a spherical surface in this embodiment) that is convex toward the rear surface, so that the light enters from the light passing portion 25 of the power generation unit 20 and is reflected by the reflecting surface 41. The reflected light is made to be condensed light. The reflection surface 41 is made of a material having high reflectance and weather resistance, such as a mirror-like stainless steel plate.
[0016]
Next, the operation of the hybrid power generator 1 will be described. First, when the wings 81 are rotated by the wind, power is generated by the generator of the wind power generator 80. The generated power is converted to direct current and then directly supplied to the demand department via the inverter 95, or to the power storage device 90. Once charged, it is supplied to the demand department via the inverter 95 according to demand.
[0017]
On the other hand, when light such as sunlight shines on the power generation device 10, each of the solar cells 21 generates power by direct light applied to the surface of the solar cell 21. At the same time, of the light applied to the power generation device 10, the light that has entered the inside from the light passing portion 25 is reflected by the surface of the reflecting portion 40, and a part of the reflected light is radiated again from the light passing portion 25 to the outside. However, the other part is irradiated to the back surface of the solar cell 21, and each solar cell 21 also generates power. As in the case of the wind power generator 80, the power generated on both sides of the solar cells 21 is supplied directly to the demand department via the inverter 95, or in response to the demand after charging the power storage device 90 once. It is supplied to the demand department via the inverter 95.
[0018]
Here, in the power generation device 10, since the reflecting surface 41 of the reflecting portion 40 is a curved surface that is convex toward the rear surface, the reflected light reflected by the reflecting surface 41 becomes condensed light, and more light Can be radiated to the back surface of the solar cell 21 to generate power more efficiently. That is, as shown in FIG. 3A, both the light a1 having a high incident angle and the light a2 having a low incident angle are reflected by the reflection surface 41 and condensed toward the rear surface of the solar cell 21. Light incident from the light source 25 can be applied to the back surface of the solar cell 21 more than when the reflecting surface 41 is flat, and the power generation efficiency can be improved. The reflecting surface 41 is not limited to a spherical shape, but may be any other curved surface shape or a polyhedral shape as long as the reflected light is effectively condensed on the back surface of the solar cell 21. good.
[0019]
In addition, according to the power generation device 10, since the solar cell 21 is configured to have a curved surface that is convex toward the surface, effective power generation can be performed even on the surface side of the solar cell 21. That is, if the solar cell 21 is configured to have a curved surface that is convex toward the surface, as shown in FIG. 3B, the amount of light a3 incident on the solar cell 21 is set in a planar manner. In this case (indicated by a dashed line), the amount of light a4 increases, and the amount of power generated by the solar cell 21 increases. In other words, if the same amount of generated power is obtained, the size of the power generation device 10 can be reduced. Note that such an effect is not limited to the case where the surface of the solar cell 21 is formed into a spherical surface, but also occurs when the solar cell 21 is formed into various other curved surfaces such as a conical shape, or when a polyhedral shape such as a polygonal pyramid is formed. . Conversely, if such an effect is not expected, the solar cell 21 may be formed in a planar shape.
[0020]
Further, since the power generation device 10 according to this embodiment has a structure in which the power generation device 10 is attached so as to surround the outer periphery of the column 70, the size protruding outward from the column 70 is small, and even if a building or the like is close to the column 70, The installation can be done. In particular, in the above-described embodiment, the outer shape of the power generation device 10 is circular (or polygonal), so that the outward projection can be reduced, which is preferable. Of course, the power generation device 10 may be installed to be inclined in the direction of the sun.
[0021]
Further, as shown in FIG. 4, a brim-shaped reflecting plate 50 may be provided on the outer periphery of the power generation device 10-2. If the reflection plate 50 is provided, a part of the reflected light reflected by the reflection plate 50 can be applied to the front surface side of the solar cell 21, and more effective power generation can be performed.
[0022]
In the above-described embodiment, the power generation device 10 according to the present invention is configured as the hybrid power generation device 1 in combination with the wind power generation device 80, so that the power generation can be efficiently performed by sunlight even in a situation where wind energy cannot be obtained. However, of course, the power generator 10 may be installed and used independently. For example, as shown in FIG. 5, the power generation device 10 may be installed on a utility pole 100 and stored in the daytime as electricity for a street lamp 150 attached to the utility pole 100. As described above, the power generation device 10 according to this embodiment can easily be attached even when a building or the like is near a pole such as the power pole 100 or the like.
[0023]
Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and various modifications may be made within the scope of the claims and the technical idea described in the specification and the drawings. Deformation is possible. Note that any shape, structure, or material not directly described in the specification and drawings is within the scope of the technical idea of the present invention as long as the effects and effects of the present invention are exhibited. For example, in the above-described embodiment, the outer shape of the power generator 10 is configured to be circular, but may be a polygon (such as a square or a hexagon) or another outer shape. In the above-described embodiment, the solar cell 21 and the light passing unit 25 of the power generation unit 20 are provided alternately in a region divided by a line extending radially from the center of the power generation unit 20. The shape and the position where these are provided can be variously changed.
[0024]
【The invention's effect】
As described above in detail, the present invention has the following excellent effects.
(1) According to the first aspect of the present invention, since the reflected light incident from the light passage portion of the power generation unit and reflected by the reflection surface is collected, the amount of the reflected light applied to the back surface of the solar cell And the amount of power generation can be increased, and solar cells can be used efficiently. In other words, the dual-sided power generation type solar cell can be effectively used, the usage of the solar cell can be reduced, and the power generation device can be downsized.
[0025]
(2) According to the second aspect of the present invention, the amount of light applied to the surface of the solar cell increases, and the amount of power generated by the solar cell increases.
[0026]
{Circle over (3)} According to the third aspect of the invention, the power generation of the solar cell can be more effectively performed by the reflection plate provided on the outer periphery of the power generation device.
[0027]
(4) According to the invention as set forth in claim 4, the size of the power generator protruding outward from the supporting column can be reduced, and an obstacle such as a building is installed close to the column. Even so, the attachment can be performed.
[0028]
(5) According to the fifth aspect of the present invention, the power generation device according to the present invention can be installed in a small installation area on the support for the wind power generation device, and the entire hybrid power generation device can be made compact.
[Brief description of the drawings]
FIG. 1 is a schematic perspective view showing a hybrid power generator 1 in which a wind power generator 80 is combined with a power generator 10 according to one embodiment of the present invention.
FIG. 2 is a view showing the power generator 10, FIG. 2 (a) is a schematic plan view, and FIG. 2 (b) is a schematic cross-sectional view along AA in FIG. 2 (a).
FIG. 3 is an explanatory diagram of a light input and reflection state in the power generation device 10.
4 is a diagram showing another power generation device 10-2, FIG. 4 (a) is a schematic plan view, and FIG. 4 (b) is a BB schematic cross-sectional view of FIG. 4 (a).
FIG. 5 is a diagram showing an example in which the power generator 10 is installed on a utility pole 100.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 hybrid power generation device 10 power generation device 20 power generation unit 21 solar cell 25 light passing unit 40 reflection unit 41 reflection surface 50 reflection plate 70 support 80 wind power generation device 81 wing 83 arm 90 power storage device 95 inverter 100 power pole 10-2 power generation device

Claims (5)

A power generation unit having a light passing unit provided between planar two-sided power generation solar cells,
A reflection unit disposed on the back side of the power generation unit and having the surface as a reflection surface,
By forming the reflecting surface of the reflecting portion into a curved surface shape convex toward the back surface or a polyhedral shape convex toward the back surface, the reflection reflected from the light passing portion of the power generation unit and reflected by the reflecting surface A power generation device, which collects light and irradiates the solar cell on the back side of the power generation unit. The power generation device according to claim 1, wherein the solar cell of the power generation unit is formed in a curved surface shape convex toward the surface or a polyhedron shape convex toward the surface. 3. A solar cell on a front surface side of a power generation unit by irradiating a part of the light reflected by the reflection plate by installing a brim-shaped reflection plate on an outer periphery of the power generation device. A power generating device according to claim 1. The power generator according to claim 1, 2 or 3, wherein the power generator is attached so as to surround an outer periphery of a column supporting the power generator. The power generator according to claim 4, wherein a wind power generator is installed on the support.

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