JP2003152214A - Photovoltaic power generation apparatus incorporated in plant and the like - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a photovoltaic power generation apparatus which is incorporated in an artificial plant or built on a natural tree. SOLUTION: A translucent substrate is arranged on a light irradiation side of a leaf part and/or branch and trunk portion of an artificial plant original model and a thin-film solar battery module composed of a planting layer and a thin film solar battery module comprising of conductive base body are arranged on the reverse surface, an output wire is laid in the branch and trunk portion and an electric accumulating mechanism is installed in a plant pot portion. Furthermore, a solar battery cell is connected to the electric accumulating mechanism by an electric wire, laid on a natural plant or ivy of a hedge, etc., and connected to lighting fixtures to be used for night illumination. Consequently, a device which is incorporated in the artificial plant in one body can suppress the decrease in the photoelectric conversion efficiency and is movable as an indoor decorative article, so that decoration effect can be expected. The device may be wound around the natural plant, ivy of the hedge, etc., to exhibit effect as an illuminating decoration.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photovoltaic power plant incorporating tree planting. More specifically, the present invention relates to a solar power generation device that is integrally incorporated in an artificial tree plant and can be moved indoors or outdoors, and a solar power generation device that is installed in a natural tree plant or is combined with an illumination lamp that is wound around a vine such as a garden tree or a fence.

[0002]

2. Description of the Related Art In recent years, solar cells and solar power generation systems that convert sunlight into electricity have been attracting attention as clean energy sources that do not generate pollution such as exhaust gas and radiation from the standpoint of global environmental protection. Has been done. In these solar cell modules, silicon solar cells are generally used because the materials used have almost no effect on environmental protection, the energy conversion rate is high, and the power generation characteristics are stable.
As such a silicon solar cell, for example, a single crystal silicon solar cell obtained by forming an n-type diffusion layer on the surface of a single crystal silicon substrate, forming an electrode, and then forming an antireflection film is well known. Has been.

[0003]

A solar cell, which is one of the devices utilizing solar energy, utilizes sunlight in the form of light energy. Light energy is exchanged with electricity to produce various types of electricity. Supplied to equipment. Most solar cells are N
A P-type layer is formed by diffusing impurities on the surface of a type silicon substrate, and an electrode is derived from the N-type layer and the P-type layer to obtain an electromotive force. However, a solar cell absorbs light energy to generate electricity. The wavelength that can be converted into energy is 0.5 to 0.
It is about 8 μm, and the wavelength range with high conversion efficiency is 0.7 to
It becomes even narrower at 0.8 μm. It is said that the upper limit of the photoelectric conversion efficiency of a silicon solar cell is about 23%, and even a commercialized product does not exceed 20%. Furthermore, the other part of the solar energy incident on the solar cell is absorbed,
It is converted into heat and causes a rise in temperature of the solar cell element, which causes a decrease in photoelectric conversion efficiency.

Various techniques have been proposed for suppressing the temperature rise of the element and preventing the decrease of the efficiency as described above, but in the package structure in which the heat dissipation is large, the ratio of the element area to the package is considered. However, there is a problem that the temperature rise becomes larger as the value becomes larger. For example, Japanese Patent Publication No. 60-41879
The publication describes a photovoltaic-heat collecting hybrid device configured by attaching a solar cell to a flat plate-type collector, and suppressing a decrease in conversion efficiency accompanied by a temperature rise due to light reception by a solar cell element and increasing efficiency. It is a high efficiency solar cell hybrid device that enhances In addition, Japanese Utility Model Publication No. 1-41101 discloses a light which can efficiently collect solar heat and at the same time absorbs thermal energy by a heat collector capable of preventing a decrease in photoelectric conversion efficiency and at the same time collects electrical energy by a solar cell. -There is a description of the heat composite collector.

Further, the solar cell module main body is generally installed on the roof, and is installed outdoors such as on the roof of a building. Therefore, it is closely related to the roofing structure.
In addition, installation on walls, windows, etc. can be considered, but it is not popular at present. Further, the solar cells are exposed to the outdoors, so that the accumulation of rain water and the accumulation of dust during use tend to be a problem. In particular, the solar cell module using a resin film or the like as the outermost surface coating material removes the dirt adhered to and deposited on the surface during use to some extent, but the degree of dirt removal due to natural conditions is also inferior to that of glass, Due to the natural environment such as rain, snow, wind, etc., there is a drawback that rainwater is likely to stay or stains are deposited or accumulated, the transparency of the surface coating material is reduced, the incident light reaching the photovoltaic element is reduced, and the photovoltaic There was a problem that the decrease of

[0006]

As a result of studying the above-mentioned proposed solar cell module, the solar cell element generally suppresses a decrease in photoelectric conversion efficiency accompanying a temperature rise due to light reception and enhances efficiency. There is no need for a complicated mechanism such as a heat collecting fin or an endothermic spacer,
By opening the space on the back side, the effect of suppressing the temperature rise can be expected, and it is not fixedly installed on the roof of the building, rooftop or wall, but the installation location can be changed and it can be used indoors or outdoors as a decorative item. Expected to be movable and to beautify the appearance, to clean the solar cell module where dust and the like are likely to accumulate when exposed to wind and rain, and to have a design and decoration effect including the feeling of tree planting. In consideration of the possible points, etc., the inventors have reached the present invention by paying attention to the fact that these problems can be achieved as a photovoltaic power generation device by integrally incorporating the solar cell module into artificial tree planting.

The photovoltaic power plant incorporating a tree according to the present invention has been made as a result of studies for solving these problems, and the present invention provides a light source for at least a leaf portion and / or a stem portion of an artificial planting prototype. A transparent substrate made of an electrically conductive material selected from one of glass, a plastic film, and a metal as a surface electrode on the irradiation side, a plating layer adhered to the back surface in contact with the substrate, and an amorphous material serving as a photovoltaic element. A semiconductor thin film solar cell module formed of a conductive substrate made of a semiconductor or a semi-amorphous semiconductor is arranged, output wiring is laid at a branch trunk portion, and a power storage mechanism is set at a flowerpot portion. Planted solar power generation equipment and the above-mentioned solar cells are connected to the electricity storage mechanism with electric wires and installed on natural trees or street trees, and connected to lighting fixtures and used for night illumination. A plant-embedded built-in solar power generation device, and the solar cells are connected to a power storage mechanism with electric wires, laid around natural trees or fences, stalks of vines, and used for night lighting with lighting fixtures. It is an object of the present invention to provide a photovoltaic power generation device with a built-in tree plant.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention is based on the above-mentioned structure, and one embodiment of the present invention will be described below with reference to the drawings.

Embodiment FIG. 1 is a schematic view for explaining a main part of a solar power generation system incorporating a tree according to the present invention, FIG. 2 is a cross-sectional view for explaining a main part of a power storage mechanism of a plant pot, and FIG. 3 is a natural tree or a vine. It is a principal part explanatory view of the apparatus entwined with and erected.

1 and 2, the solar battery cells 6 arranged in the leaves 3 in the artificial tree planting prototype 2 of the desired construction in the main body 1 of the photovoltaic plant incorporating trees according to the present invention are irradiated with light. Glass, plastic film as a surface electrode on the side,
A translucent substrate made of an electrically conductive material selected from any of metals, a plating layer made of an I layer and a P layer formed on the surface of an N-type silicon substrate in contact with the substrate, and a photovoltaic element on the back surface. A semiconductor thin-film solar battery cell 6 formed of a conductive base material made of an amorphous semiconductor or a semi-amorphous semiconductor is placed, and the solar battery cell 6 is connected to the branch portion 4 of the artificial tree planting prototype 2 and an output wiring 7 is provided. A laid solar cell module 5 is formed, and a power storage mechanism 11 including a charging regulator 9 and a storage battery 10 is installed in a plant pot portion 8 by leading out from the output wiring 7 of the solar cell module 5. It has a schematic configuration.

FIG. 3 is an explanatory view of a main part of a device erected by being entangled with a natural tree or a vine. The storage battery 10 of the electricity storage mechanism 11 is arranged in a bridge-bridge form across a natural tree including a broad-leaved tree, a coniferous tree and the like.
A storage mechanism 11 including a charging regulator 9 and a charging regulator 9 is connected to the electric wire 12, and the solar battery cell 6 is arranged in the vertical direction of the electric wire 12.
Are arranged. Connection is in series, wire 12
Is preferably flexible and / or flexible. Electrodes are derived from the solar battery cells 6 to obtain an electromotive force, and the extracted electric energy can be connected to an illuminating lamp to be used as an illumination device item such as a light-up at night.

[0012] In addition, a large number of solar cells 6 and electric wires 12 are connected to each other, and constant electric power taken out as the solar cell module 5 is wound around a stalk of a garden tree, a natural tree or a fence, and is erected in a bridging manner. Or, by wrapping it around a standing tree, a fence, or the like, as a use of solar energy, a lighting fixture is connected to provide a form of use as an illumination device such as lighting up at night.

In the above-described embodiment in which the tree is wrapped around the stem of a natural tree or a fence-like vine, and connected by the charging regulator 9 and the storage battery 10 with the electric wire 12, the solar heat is applied to convert the solar energy into the sun. A decrease in the photoelectric conversion efficiency of the battery is observed. For example, heat collecting fins and spacers are used.
As opposed to arranging the heat collecting means in the roof installation like
According to the said structure, it works so that the heating rise of solar heat can be suppressed at least by space cooling. Further, if necessary, it is possible to adopt a suitable shape for heat dissipation such as a heat dissipation projection piece or a heat dissipation needle-shaped projection for heat dissipation on the peripheral edge of the leaf portion 3.

Further, in the form of winding and erection on the stem of a natural tree or a fence-like or vine plant, the suspended or suspended solar cells 6 tend to change their solar radiation surface depending on the natural environment such as wind direction. Since it is expensive, the solar battery cells 6 can be arranged not only on one side but also on both front and back sides.

[0015]

EFFECTS OF THE INVENTION According to the photovoltaic power generation device integrated into the artificial tree plant prototype of a desired setting, the decrease in photoelectric conversion efficiency due to the temperature rise of the solar cell element is suppressed, and the accumulated dust and the like are easily washed, and the indoor and outdoor In addition, it can be moved as a decorative installation item, and it can be expected to have a design and decoration effect including planting colors.
In addition, a lighting device is combined with a solar cell module and a power storage mechanism connected by an electric wire, and it is erected on a natural tree or a street tree, or erected around a garden tree or a fence of a fence in a bridge form, and it is effective as an illumination device product. .

[Brief description of drawings]

FIG. 1 is a schematic diagram for explaining a main part of a photovoltaic power generation device incorporating a tree according to the present invention.

FIG. 2 is a cross-sectional explanatory view of a main part showing a power storage mechanism of a plant pot portion.

FIG. 3 is an explanatory view of a main part of a device that is erected and entwined with a natural tree or a vine.

[Explanation of symbols]

1 Solar power generator body 2 Artificial tree planting prototype 3 leaves 4 branches 5 solar cell module 6 solar cells 7 Output wiring 8 plant pot parts 9 Charger regulator 10 storage battery 11 Storage mechanism 12 electric wires

Claims (3)

[Claims] 1. A transparent substrate made of a conductive material selected from at least one of glass, a plastic film, and a metal as a surface electrode on the light irradiation side of at least a leaf portion and / or a branch trunk portion of an artificial tree planting prototype, A semiconductor thin-film solar cell module formed of a plating layer deposited on the back surface in contact with the substrate and a conductive substrate made of an amorphous semiconductor or a semi-amorphous semiconductor that serves as a photovoltaic element is disposed at a branch portion. A photovoltaic power plant with built-in trees, in which output wiring is laid and a power storage mechanism is installed in the plant pot area. 2. The plant-embedded photovoltaic power generation device according to claim 1, wherein the solar battery cell is connected to a power storage mechanism by an electric wire, installed in a natural tree or a street tree, and connected to an illumination lamp to be used for nighttime illumination. . 3. The solar cell is connected to a power storage mechanism by an electric wire, is laid around a stalk of a natural tree or a fence, or a vine, and is connected to an illumination lamp and used for nighttime illumination. Photovoltaic power plant with built-in tree planting.