JP2018082133A - solar panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solar panel capable of eliminating use of a shadow part in solar sharing concurrently performing plant growth and power generation at a farmland.SOLUTION: The solar panel is structured so that a plurality of power generation bodies are installed for power generation, a translucent part is formed by taking a space between power generation bodies and a plant is raised with solar light passing through the translucent part. One solar panel is formed by installing a diffuser panel on the translucent part and averaging the intensity of solar light.SELECTED DRAWING: Figure 1

Description

  In particular, the present invention relates to a solar panel suitable for use in farmland.

Solar panels used for general power generation have a structure in which a plurality of power generators are arranged side by side without gaps in order to maximize the amount of power generation per area.
In order to increase the power generation efficiency of the solar panel as much as possible, the solar panel is generally installed with an elevation angle of about 30 degrees. However, when this installation angle is applied to farmland, the sun hardly hits the ground in winter due to changes in the sun's height due to the season, and there is a risk that the growth of plants planted on the ground will be greatly hindered. For this reason, solar panels were installed with a gap to avoid this problem.

  Japanese Patent No. 3227524 Patent Publication No. 2005-277038

However, when the panels are mounted at a distance, the shadow caused by the solar panel is large because the panel size is usually close to 1 m on a side. In addition, since the solar panels are installed with a large gap, the area of the sunshine on the farmland becomes large in summer when the solar altitude is high. Although the shade part and the sunshine part move with the movement of the sun, it takes time to change from the shade part to the sunshine part and from the sunshine part to the shade part because both the shade part and the sunshine part are large. For this reason, there was a risk that the plants in the shaded area would be hampered by the lack of sunlight, and the plants in the sunshine area could be inhibited by strong sunlight.
This invention solves such a conventional subject, and it aims at providing the solar panel for agriculture which can perform photovoltaic power generation and plant cultivation efficiently.

In order to solve the above-mentioned conventional problems, a plurality of small power generators are installed in the solar panel with a gap to create a translucent part through which sunlight is transmitted, and a single solar panel is obtained. It is.
Part of the sunlight irradiated to the solar panel hits the power generator and generates electricity. The remaining sunlight passes through the gap between the power generators, that is, the light transmitting portion, hits the plant on the ground and grows the plant.
The area of the eye shadow and sunshine formed by the solar panel is small, and the plant will not be exposed to the large intestine light for a long time or excessive sunlight, and the growth will not be inhibited.
Further, by attaching a diffuser plate to the light transmitting portion, there is no difference in the light intensity between the shadow portion and the sunshine portion, and the growth inhibiting factor due to the intensity of light is completely eliminated.

  This invention solves the said conventional subject, and can perform solar power generation and plant cultivation efficiently.

  Schematic diagram of the back surface of the solar panel in the first embodiment of the present invention   Schematic of back side of solar panel in embodiment 2 of the present invention   Schematic of the back surface of the solar panel in the third embodiment of the present invention   Schematic of the back surface of the solar panel in the fourth embodiment of the present invention   Sectional drawing of the solar panel in Embodiment 5 of this invention   Top view of solar panel according to Embodiment 5 of the present invention   Sectional drawing of the solar panel in Embodiment 6 of this invention   Embodiment 7 A solar panel sectional view of the present invention   The top view of the solar panel in Embodiment 8 of this invention   Solar panel mounting embodiment of the present invention

Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.
The solar panel of the present invention creates a translucent part in the solar panel by attaching a plurality of small power generators at intervals, and a part of the sunlight irradiated on the panel hits the power generator to generate power, and the rest The sunlight is irradiated to the plant through the translucent part.

Embodiment 1

FIG. 1 is a schematic back view of a solar panel according to the first embodiment of the present invention.
In FIG. 1, a plurality of small power generators 1 are attached to a support frame 3 at intervals in a frame 2. A light transmitting portion 4 is formed between the power generation bodies 1 attached at intervals.
The power generator 1 has a plurality of silicon crystal power generation elements connected in series in an aluminum frame, the front surface is protected by translucent glass and the back surface is protected by a back surface protection material, and the output power is a small one of several watts. Is preferred.
About the solar panel comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.
First, of the sunlight falling on the solar panel, the sunlight that hits the power generator 1 generates electricity by the power generator 1. The generated electricity is stored directly or with a battery and supplied to the load.
The sunlight that passes through the solar panels hits the plants and grows them.
The area of the shadow by the power generator 1 and the area of the sunlight that hits the plant are small because the power generator 1 is small, and the time required to change from the shade part to the sunshine part or from the sunshine part to the shade part accompanying the movement of the sun is It will be short.

The intensity of sunlight falling on the plants from the sunshine is 100 Klux in fine weather, and this value is too strong for most plants, and growth is hindered when exposed for a long time. The illuminance of the shaded area is about 10 Klux when it is fine, and about 5 Klux when it is cloudy. The intensity of light is insufficient for some plants that grow even in low light. The
However, in the present embodiment, by installing the small power generator 1 in the solar panel at intervals, the sunshine part and the shadow part become small, and the sunshine part accompanying the sun movement or the shadow part or The risk of impairing plant growth is reduced by shortening the time required to change from the shaded area to the sunshine area.

In the present embodiment, the number and position of the power generators 1 can be changed by the mounting holes of the power generators 1 formed in the support frame 3. By changing the area ratio of the power generator 1 and the translucent portion 4, the intensity of sunlight hitting the plant can be easily changed.

  FIG. 2 is a schematic back view of a solar panel according to the second embodiment of the present invention. The power generation body 1 is arranged so that the power generation body 1 has a slit shape. The same function as in the first embodiment is performed.

FIG. 3 is a schematic view of the back surface of the solar panel according to the third embodiment of the present invention.
In FIG. 3, a plurality of power generators 1 are attached to a support frame 3 at intervals in a frame 2. A diffusion plate 5 is attached between the power generation bodies 1 attached at intervals.
About the solar panel comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.
First, of the sunlight falling on the solar panel, the sunlight that hits the power generator 1 generates electricity by the power generator 1. The generated electricity is stored directly or with a battery and supplied to the load.
The sunlight that has passed through the diffusion plate 5 is diffused and averaged by the diffusion plate 5, hits the plant, and grows the plant.
As a result, uniform sunlight always hits the entire plant, eliminating the factor that hinders the growth and promoting healthy growth.

  Moreover, in this Embodiment, the intensity of the sunlight which strikes a plant can be changed easily by changing the area ratio of the electric power generation body 1 and the diffusion plate 5.

  FIG. 4 is a schematic back view of a solar panel according to the fourth embodiment of the present invention. The power generator 1 is arranged so that the diffusion plate 5 has a slit shape. The same function as in the third embodiment is performed.

FIG. 5 shows a cross-sectional view of a solar panel according to the fifth embodiment of the present invention.
In FIG. 5, the plurality of power generators 1 are electrically connected by connection lines 9. A light-transmitting portion 4 that allows sunlight to pass through is generated in the gap between the power generation bodies 1 that are attached at intervals.
The surface of the power generation body 1 is protected by a surface protection material 6 such as tempered glass that allows sunlight to pass through, and the back surface is protected by a back surface protection material 7 such as a polyester film. The light-transmitting portion 4 is filled with a light-transmitting filler 8 in order to seal and fix the. In order to make this mountable to the gantry 15, it is fixed to the frame 2 made of aluminum or the like through a seal material 10. An output box 11 is attached to the back surface protective material 7 in order to take out the output of the power generator 1 to the outside. The power generator 1 is preferably a silicon crystal solar cell.
About the solar panel comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.
First, of the sunlight falling on the solar panel, the sunlight that hits the power generator 1 generates electricity by the power generator 1. The generated electricity is stored directly or by a battery or the like and supplied to a load via a converter.
The sunlight that has passed through the light-transmitting part 4 filled with the filler 8 hits the plant planted on the ground and grows the plant.

  FIG. 6 is a top view of the solar panel according to the fifth embodiment of the present invention.

FIG. 7 is a cross-sectional view of a solar panel according to the sixth embodiment of the present invention.
It has a structure in which a diffusion plate 12 that diffuses sunlight is disposed at a location corresponding to the light transmitting portion 4.
By attaching the diffusing plate 12 to the translucent part 4, there is no difference in the light intensity between the shade part and the sunshine part, and the growth inhibiting factor due to the light intensity difference is completely eliminated.

FIG. 8 is a cross-sectional view of a solar panel according to the seventh embodiment of the present invention.
The diffusion film 13 is attached inside the back surface protective material 7.
The effect is the same even if the diffusion film 13 is attached to the outside of the back surface protective material.

FIG. 9 is a top view of a solar panel according to the eighth embodiment of the present invention.
The power generator 1 is a thin film solar cell.
The power generator 1 is formed on the substrate 14 by discontinuously printing so that the translucent portion 4 is formed by, for example, a printing method.
The organic thin film power generator 1 is generally produced by continuously printing on a flexible substrate.
In the present invention, the power generator 1 is printed discontinuously to form the light transmitting portion 4. By changing the interval between the power generation bodies 1, the area of the translucent part 4 changes, and the intensity of sunlight passing through the solar panel is controlled.

FIG. 10 is a schematic view of a so-called solar sharing system, which is an embodiment in which a solar panel according to the present invention is installed, and a solar panel is installed on a pedestal 15 provided on farmland to simultaneously perform plant growth and solar power generation. . Solar panels are mounted almost horizontally.
In order to remove dirt on the surface of the solar panel with rainwater, it may be attached at an angle of 5 degrees or less. In addition, a thin thread may be put on the solar panel to prevent bird damage.

Plants grow vigorously and grow well as sunlight increases, but the amount of photosynthesis is constant when the intensity exceeds a certain level, and the amount of photosynthesis does not change even if the light becomes stronger. This point is called the light saturation point, but this light saturation point varies depending on the plant.
For example, watermelon that requires strong light, 70-80 klux for tomatoes, 40-55 klux for rice, cucumber, turnip, and grapes that require relatively strong light, 20-30 klux for strawberries, lettuce, and sweet potato that do not require strong light. For azaleas, primulas, and cyclamen that grow with weak light, it is about 5-10 klux.
On the other hand, sunlight is 100 klux during midsummer days and 50 klux when it is cloudy, and this value is an unnecessary intensity above the light saturation point except for some plants. In some cases, it can be harmful and inhibit growth.
If the ratio of the area of the power generator 1 to the translucent part 4 is 1: 1, the intensity of sunlight irradiated on the plant is 50 klux on a clear day and 25 klux on a cloudy day, and no strong light is required. Suitable for strawberries, lettuce and sweet potatoes.

Windproof nets or insect nets can be attached to the columns and beams of the gantry 15.
By attaching a windproof net, it is possible to prevent fruits such as apples and pears from falling due to strong winds such as typhoons. You can also protect your crops from pests by installing an insect net.

  Although the solar panel of the present invention is basically mounted horizontally, it is possible to prevent the solar panel from being broken by dropping snow by inclining, for example, about 45 degrees around the center of the solar panel during snowfall.

  By slightly reinforcing the strength of a commonly used greenhouse, the thin film flexible solar panel of the present invention can be attached to the upper surface of the greenhouse. As a result, it is not necessary to make a new frame, and the cost can be greatly reduced.

  A rooftop garden can be formed by installing a stand on the rooftop of the building and attaching the solar panel of the present invention to the top surface thereof.

  By installing a stand in the factory site and attaching the solar panel of the present invention on the top surface, it is possible to grow lawns, ornamental flowers and trees, contributing to plant greening.

  By attaching the solar panel of the present invention to a window of a factory or a building, external light is taken into the room at the same time as power can be generated, and energy saving is possible.

DESCRIPTION OF SYMBOLS 1 Power generation body 2 Frame 3 Support frame 4 Light transmission part 5 Diffusion plate 6 Surface protection material 7 Back surface protection material 8 Filler 9 Connection line 10 Sealing material 11 Output box 12 Diffusion plate 13 Diffusion film 14 Substrate 15 Mounting stand

Claims (3)

A solar panel characterized by providing a translucent part through which sunlight passes in a solar panel that houses a plurality of power generation bodies that generate power by receiving sunlight. A solar panel using any one of a silicon power generator, a compound power generator and an organic power generator as the power generator. A solar panel, wherein a diffusion plate or a diffusion film is disposed in the light transmitting part.

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