JPH07131047A - Collecting method of solar energy - Google Patents

Abstract

PURPOSE:To allow simple installation of solar cell and highly efficient collection of solar energy by utilizing an elevated bridge as a structure for fixing the solar cell. CONSTITUTION:Solar energy is collected through the use of an elevated bridge 1 comprising a bottom wall part 5 installed above the ground, side wall parts 7 installed on the opposite sides thereof, and a rail 9 laid on the bottom wall part 5. A reflector 13 is fixed to the inner face of the side wall part 7, and a solar cell panel 21 is laid on the bottom wall part 5 thus receiving the solar beam directly by the solar cell panel 21 and receiving the solar beam reflected thereon by the solar cell panel 21.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for collecting solar energy, and more particularly to a method for efficiently collecting solar energy by using a viaduct.

[0002]

2. Description of the Related Art Solar cells convert light energy into electrical energy, and from the viewpoint of solving global environmental problems such as global warming problems, the widespread use of solar cells is an important issue that must be actively addressed. It is one of the challenges.
Among the solar cells, amorphous solar cells are slightly inferior in energy conversion efficiency to crystalline solar cells, but they are lightweight, suitable for mass production, and cheap in cost. ing. When attempting to obtain electrical energy using such a solar cell, conventionally,
A mount is installed at an appropriate place, and the solar cells are arranged on this mount.

[0003]

Therefore, in order to obtain electric energy using a solar cell, a stand for the solar cell is required, and it is necessary to secure a space for installing the stand, which results in cost reduction. There was a problem in terms of points and space. On the other hand, in recent years, in order to solve environmental problems such as noise, trains are often run on viaducts. This type of viaduct is provided with a bottom wall portion above the ground, side wall portions erected on both sides of the bottom wall portion, and tracks or the like laid on the bottom wall portion. It is provided in units of 10 kilometers and hundreds of kilometers. However, the conventional viaduct merely functions for running trains. The present invention was devised by focusing on these solar cells and viaducts, and the object of the present invention is to use the viaducts as a structure for mounting solar cells, so that solar cells can be easily installed. It is an object of the present invention to provide a solar energy collecting method capable of efficiently collecting solar energy.

[0004]

To achieve the above object, the present invention provides a bottom wall portion provided above the ground, side wall portions provided on both sides of the bottom wall portion, and the bottom wall portion. A method of collecting solar energy by using a viaduct comprising a track laid on a section, a reflector is attached to the inner surface of the side wall section, and a solar cell panel is arranged on the bottom wall section. The solar cell panel directly receives the sunlight, and the solar panel irradiates the sunlight with which the reflector plate is reflected.

The present invention also provides that the solar cell panel is
A substrate forming a − electrode, a transparent electrode forming a + electrode, an amorphous silicon layer disposed between the substrate and the transparent electrode, and a member having a light-transmitting property, formed on the transparent electrode. Is an amorphous solar cell panel composed of an upper protective layer and a lower protective layer formed under the substrate, and a lower layer is provided on the lower protective layer of the amorphous solar cell panel. Is attached to the side of the bottom wall.

[0006]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a cross-sectional front view of a viaduct to which the method for collecting solar energy according to the present invention is applied, and FIG. 2 is a plan view of the relevant part. 1 is a viaduct, 1 is a viaduct, 1 is a bridge pier that is erected above the ground, 5 is a bottom wall part provided above the ground by the bridge pier 3 and bridge girders, and 2 are sidewalls that are erected on both sides of the bottom wall The portion 7 and the track 9 and the like laid on the bottom wall portion 5 are provided. A large number of concrete sleepers 11 are arranged on the bottom wall portion 5, and the track 9 is installed on the sleepers 11. A stainless steel plate 13 is attached to the inner surface of the side wall portion 7, and a surface 13A of the stainless steel plate 13 is mirror-finished in order to increase the reflectance.

A large number of solar cell panels 21 are arranged on the bottom wall portion 5. In the embodiment, the solar cell panel 21 is an amorphous solar cell panel.
As shown in FIG. 3, the solar cell panel 21 includes a stainless substrate 23. This stainless steel substrate 23
Has a thickness of 0.125 mm, for example, and also functions as an electrode. An amorphous silicon layer 25 is formed on the stainless steel substrate 23. The amorphous silicon layer 25 is formed in a known multi-layer structure including a P layer, an I layer, and an N layer necessary for forming an amorphous solar cell. There is. A transparent electrode 27 is formed on the amorphous silicon layer 25, and this transparent electrode 27 functions as a + electrode.

Fluorocarbon resin is coated on the bottom of the stainless steel substrate 23 and on the transparent electrode 27 to form protective layers 29, 3.
1 is formed, the thickness of these protective layers 29 and 31 is, for example, 1.0 mm, and the protective layer 31 on the transparent electrode 27 is formed of a light transmissive fluorine resin. The transparent electrode 27 and the protective layer 31 side is the light receiving surface (front surface) 21A of the solar cell panel 21, and the stainless substrate 23 and the protective layer 29 side is the back surface 21 of the solar cell panel 21.
B.

Under the protective layer 29 of the solar cell panel 21, that is, on the back surface 21B of the solar cell panel 21, a base layer 33 made of synthetic resin is provided. The solar cell panel 21 has a thickness of 3 mm or less excluding the underlayer 33 and has a certain degree of flexibility.
Since it also has flexibility, it has excellent adhesion to the surface of the concrete wall 1. The solar cell panel 21 and the base layer 33 both have a rectangular shape in plan view, the base layer 33 is formed with a contour larger than that of the solar cell panel 21, and the base layer 33 has an outer edge portion 3301 located outside the solar cell panel 21. Is provided.

Lead wires 35 are connected to the transparent electrode 27 (+ electrode) and the stainless steel substrate 23 (-electrode), respectively. These lead wires 35 are elements for preventing backflow of current, an overcharge prevention circuit, and a storage battery. Connected to a storage circuit consisting of
The electric power generated by the solar cell panel 21 is stored in the storage battery. It should be noted that the method of using the electric power generated by the amorphous solar cell panel 21 is arbitrary, and the generated electric power is not stored in the storage battery, but is converted from direct current to 100 V alternating current by an inverter circuit, and commercialized from the inverter circuit. It may be supplied to a power source, or may be directly supplied to a DC motor or the like and used to drive it.

A large number of the solar cell panels 21 are sleepers 1
1 or on the bottom wall 5 between the sleepers 11 or on the bottom wall 5 lateral to the sleeper 11 or on the bottom wall 5 between the tracks 9, its light-receiving surface 21A is attached with the base layer 33 facing upward.

In the viaduct 1 in which the solar cell panel 21 is arranged in this manner, the sun rises during the day and the solar cell panel 21 is irradiated with sunlight, so that solar energy is converted into electric energy and converted into a storage battery. Charged. Since the viaduct 1 is provided in units of tens of kilometers and hundreds of kilometers, the area that receives solar energy is extremely large, and a large amount of power generation can be expected. Further, since the stainless steel plate 13 is arranged on the side wall portion 7, the sunlight irradiated on the side wall portion 7 is reflected by the stainless steel plate 13 and collected by the solar cell panel 21,
The collection efficiency of solar energy is further enhanced, and a larger amount of power generation can be expected.

Further, in the embodiment, the underlayer 3 having flexibility is used.
Since the amorphous solar cell panel 21 provided with 3 is used, the solar cell panel 21 can be mass-produced at low cost,
Since it has flexibility, it can be easily transported and attached. In addition, although the case where the amorphous solar cell panel 21 is used has been described in the embodiment, a crystalline solar cell panel may be used. Further, in the embodiment, the case where the reflector is made of the stainless steel plate 13 has been described, but the configuration of the reflector is arbitrary.

[0014]

As is apparent from the above description, the present invention is
Solar energy is collected using a viaduct including a bottom wall portion provided above the ground, side wall portions standing on both sides of the bottom wall portion, and a track laid on the bottom wall portion. A method, wherein a reflecting plate is attached to the inner surface of the side wall portion, a solar cell panel is disposed on the bottom wall portion, and the solar cell panel receives sunlight directly, and the sunlight is radiated to the reflecting plate. Since it is reflected by the reflection plate and received by the solar cell panel, a stand dedicated to the conventional solar cell is not required, and the solar cell can be easily installed because the viaduct is used as a structure for mounting the solar cell, Moreover, it becomes possible to collect solar energy efficiently.

[Brief description of drawings]

FIG. 1 is a cross-sectional front view of a viaduct to which a method for collecting solar energy according to the present invention is applied.

FIG. 2 is a plan view of an viaduct to which the solar energy collecting method according to the present invention is applied.

FIG. 3 is a cross-sectional view of an amorphous solar cell panel.

[Explanation of symbols]

 1 Viaduct 5 Bottom wall 7 Side wall 9 Orbit 11 Sleepers 13 Stainless steel plate 21 Solar cell panel 33 Underlayer

Claims (2)

[Claims] 1. A viaduct including a bottom wall portion provided above the ground, side wall portions standing on both sides of the bottom wall portion, and a track laid on the bottom wall portion is utilized. A method of collecting solar energy, wherein a reflecting plate is attached to the inner surface of the side wall portion, a solar cell panel is arranged on the bottom wall portion, and sunlight is directly received by the solar cell panel, A method of collecting solar energy, characterized in that the solar light is reflected by the reflecting plate and received by the solar cell panel. 2. The solar cell panel comprises a substrate forming a − electrode, a transparent electrode forming a + electrode, an amorphous silicon layer arranged between the substrate and the transparent electrode, and a light transmissive layer. An amorphous solar cell panel composed of an upper protective layer formed on the transparent electrode by a member having, and a lower protective layer formed under the substrate,
The method for collecting solar energy according to claim 1, further comprising a base layer provided on the lower protective layer of the amorphous solar cell panel, the base layer being attached to the bottom wall side.