KR20200120101A - Agro-photovoltaic system - Google Patents

Abstract

In the present invention, a plurality of vertical frames (10) are erected on farmland at regular intervals, and a plurality of horizontal frames (11) are rigidly connected to each other by a fixing means such as a clamp. A space in which crops can be cultivated is provided in a lower part, and a solar panel (20) is fixedly coupled to an upper part. The solar panel (20) has a longer length in a vertical direction compared to a horizontal direction and is arranged to be spaced apart right and left, and the solar panels (20) located in front and rear are arranged at alternate positions to form a zigzag shape on the whole to suppress an occurrence of continuous shade of the crops during the daytime when the sun passes and to allow the crops growing under the solar panel (20) to receive sunlight corresponding to a light saturation point evenly. The upper part of the solar panel (20) temporarily avoids strong direct sunlight from the sun to have a good effect on the growth of crops and enable production of electricity.

Description

Agricultural solar power generation system {AGRO-PHOTOVOLTAIC SYSTEM}

The present invention relates to photovoltaic power generation, and in particular, to solar power generation that uses farmland to install a photovoltaic power generation facility but does not interfere with the amount of sunlight of crops planted in farmland.

As a result of research on solar cells, many commercializations have been made due to environmental issues and concerns about energy depletion. A solar cell converts sunlight into electrical energy using the properties of a semiconductor, and converts light energy into electrical energy by absorbing light and generating electrons and holes.

In order to generate photovoltaic power using solar cells, a wide space for installing solar cells is required. Therefore, many places are installed on the rooftops of buildings, but recently there have been many places where solar cells are installed on sunny mountains. However, in the case of installation in a mountain, the planted trees have to be cut down, which causes a problem that a considerable amount of forest damage is accompanied.

In order to solve the securing of such installation space, a method of generating additional income using surplus power by installing solar cells using farmland where crops are planted has been proposed to produce electricity at the same time as crops are cultivated.

Solar power generation in parallel with such farmland is called agricultural solar power generation system or solar sharing.

The farming solar system uses a method in which it is arranged horizontally (horizontal arrangement method) as shown in FIG. 1 due to the problem of wind pressure and rain dropping. However, in the horizontal arrangement method, the interval between neighboring modules is very narrow compared to the horizontal length, and as the neighboring modules are arranged side-by-side, the shaded continuous part is created under the shade by the module throughout the day when sunlight shines. There is a problem that it becomes difficult to grow the crops located in the. Among the four seasons, the summer season with high solar altitude appears stronger than that of other seasons. The problem of shade persistence is a big problem in that most crops have to go through the summer season with high sunlight altitude.

Domestic Registration Patent No. 10-1731551 “Rain gutter of solar panel”

Accordingly, the present invention is to provide an agricultural solar power generation system that installs a solar panel on farmland but does not interfere with the growth and fruiting of planted crops.

Another object of the present invention is to prevent the phenomenon that rainwater collects at the bottom of the module of the farming solar power generation system and intensively falls on a certain part to cause the soil to grow. It is to provide a means to prevent this from being applied.

The present invention for achieving the above object is to propose an agricultural solar power generation system,

A plurality of vertical frames 10 are fixed upright on farmland at regular intervals, and a plurality of horizontal frames 11 are rigidly connected to each other with a fixing means such as a clamp, so that the lower part of the frame A space in which crops can be cultivated is provided, and a solar panel 20 is fixedly coupled to the top,

The solar panel 20 has a longer length in the vertical direction compared to the horizontal direction and is arranged to be spaced apart from the left and right, and the solar panels 20 located in the front and rear are arranged at alternate positions to form a zigzag shape as a whole,

During the daytime when the sun passes, the solar panel 20 suppresses the occurrence of the continuous shade of the crops and allows the crops grown under the solar panel 20 to receive the sunlight corresponding to the light saturation point evenly. The panel 20 temporarily avoids strong direct sunlight from the sun, so that it has a good effect on the growth of crops and enables the production of electricity.

In the present invention, in the installation of the solar panel, the vertical direction is longer than the horizontal direction, so that it is arranged left and right at regular intervals, and arranged in a zigzag shape between the front and rear, so that all crops growing under the solar panel are It has the advantage of being able to use the farmland as a space for electricity generation without damaging the crops, as it is able to receive evenly the sunlight, which corresponds to the Gwangpohwa point, so that there is no obstacle to the growth of crops and good fruit can be expected.

In addition, rainwater is scattered by the splitter coupled to the bottom of the solar panel, preventing the phenomenon that only a specific part is digged by falling vertically from the bottom of the solar panel, and rainwater is supplied to the bottom of the solar panel to balance it. There is an advantage that the supply of rainwater is made.

1 is an installation configuration diagram of an existing generally arranged solar panel,
2 is a configuration diagram of a farming solar power generation system according to the present invention,
3 is a comparison diagram of the amount of rainwater flowing down based on the lower part of the solar panel by the conventional solar panel and the solar panel of the present invention,
4 is a configuration diagram of a splitter according to another embodiment of the present invention,
5 is a view of the solar panel presented in the present invention,
6 is a configuration and cross-sectional view of a windshield installed on the outer portion of the solar panel 7,
7A and 7B are configuration diagrams in which a fence-type net is installed in the outer portion of the solar panel.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The present invention provides a farming-type solar power generation system that enables both cultivation of crops on farmland and photovoltaic power generation at the same time, and in particular, does not interfere with the growth of crops by a solar panel located above.

Referring to FIG. 2, the farming solar power generation system 2 according to the embodiment of the present invention vertically fixes a plurality of vertical frames 10 at regular intervals, and fixes a plurality of horizontal frames 11 such as clamps. By means of a means, the vertical frames 10 are rigidly connected to each other, so that a space in which crops can be cultivated is provided in the lower part of the frame, and the solar panel 20 is fixedly coupled to the upper part.

The fixing method using a clamp between the vertical frame 10 and the horizontal frame 11 is a known technique, and the display and detailed description thereof will be omitted.

In the present invention, the solar panel 20 (hereinafter simply referred to as a “module”) is arranged to be spaced apart from the left and right by having a longer length in the vertical direction compared to the horizontal direction. At this time, the separation distance (L) between the solar panels 20 adjacent to each other to the left and right is set to be equal to or greater than the width (D) of the solar panel 20, but the maximum separation distance (L) is the width of the solar panel 20 It can be said that it is an efficient arrangement not to exceed twice the width (D).

In addition, the solar panels 20 are arranged to be spaced apart from each other in the front-rear direction. At this time, the solar panels 20 located in the front and rear directions are arranged at alternate positions to be combined in a zigzag shape as a whole.

Assuming that a predetermined number of solar panels 20 are installed based on a certain area, this arrangement allows the separation distance between the solar panels 20 to be as far as possible, so that the crops underneath can receive sunlight evenly. It is advantageous.

And if the length in the vertical direction is longer compared to the horizontal direction, the left and right space (L) between the installed modules 20 can be increased more, and the ratio of the shadow can be reduced by this space (L). . For example, a 50% level of shadow can be formed at the same interval as the width D of the installed module 20, and a 33% level of shadow can be formed at an interval of twice the width D. Therefore, the spacing is appropriately adjusted according to the light saturation characteristics of the crops growing underneath. In a normal case, it is based on a level of about 50%, so the space between the modules 20 is installed by being spaced apart at the same distance as the width D.

The solar panel must be coupled to a position 3m or more from the ground of the farmland to ensure smooth entry and exit of agricultural machinery, and it is good for workers to build farming.

In particular, according to the arrangement and height of the solar panel 20 as described above, crops growing under the solar panel 20 are evenly distributed by reducing the shade duration of the crops by the solar panel 20 during the daytime when the sun passes. You will be able to receive sunlight equivalent to a fire point.

The light saturation point is that the amount of photosynthesis no longer increases when the intensity of light reaches a certain point when plants perform photosynthesis.The amount of carbon dioxide absorbed by plants increases as the intensity of light increases and then reaches a certain limit. It will not increase. That is, according to the structure of the solar panel 20 according to the present invention, a portion of the farmland shaded by the solar panel 20 is generated, but this is temporary and all crops receive sufficient sunlight during the daytime when the sun passes. It will be possible.

In addition, the following <Reference 1> schematically shows the brightness based on a sunny day without changing the position of the ground.

<Note 1>

As shown in the above <Reference 1>, the state of light in the open field when it is sunny is almost constant in the sun direction and is about 100,000 lux. This is a considerable intensity, and in the case of a plant that is exposed for a long time beyond the light saturation point required for photosynthesis, it has a negative effect on growth.

On the contrary, in the specific point of the farmland where the solar panel 20 is installed according to the arrangement suggested by the present invention as shown in the lower figure, the shadow generated by the arrangement of the solar panel 20 moves and intermittently goes under the shadow. do. However, intermittently erasing the shade by moving the shadow caused by the arrangement of the solar panel 20 together with the movement of the sun avoids the strong direct sunlight of the sun, and rather serves to provide adequate rest to the crops. There is an advantage that works as a good point for the growth of

On the other hand, when it rains, rainwater gathers at the bottom of the slopes of the solar panels 20 and 200 and intensively falls on a certain portion of the lower part to dig farmland (soil).

3 is a comparison of the amount of rainwater flowing down based on the lower part of the solar panel by the conventional solar panel 200 and the solar panel 20 of the present invention.

That is, as the solar panel 20 of the present invention is long vertically, when it rains, a larger amount of rainwater moves to the bottom along the slope of the solar panel 20, and accordingly, rainwater falling vertically from the bottom. Compared to the existing solar panel 200, the amount of is dropped with more and stronger force, and a certain portion of the land is continuously formed.

In order to prevent this, in the present invention, as shown in FIG. 2, both brackets 30 are coupled to the lower end of each solar panel 20, and shaft bars 32 extending left and right between both brackets 30 Combine In addition, the splitter 40 is axially coupled to the shaft bar 32 so that the splitter 40 is freely rotatable, so that when rainwater falling on the solar panel 20 moves to the bottom and falls, the rainwater moves in various directions by the rotation of the splitter 40. By scattering, it is prevented from being continuously separated from the lower end of the solar panel 20 in a vertical direction and only a specific part is dug.

According to the splitter 40, when rainwater falls, it is scattered so that water is supplied to the lower part of the solar panel 20 as well, so that the rainwater is balanced and supplied. The splitter 40 having such a function is not a matter to be limited only to the solar panel 20 formed in the vertical direction in the present invention, and if necessary due to the natural environment or other various conditions, the module arranged in the horizontal direction, etc. It can be widely applied.

The splitter 40 is made of a lightweight material such as plastic or aluminum so that it can easily move even in rain or weak wind.

4 is a view showing the splitter (40a) (40b) according to another embodiment of the present invention. The splitter 40a of FIG. 4A is not composed of one full width with respect to the width D of the solar panel 20, but a plurality of short splitters 40a and several consecutive shaft bars 32 The shape of the rotating blade is also composed of a spiral shape, and the shape of the rotating blade is configured to have one full width with respect to the width (D) of the solar panel 20, but the shape of the rotating blade is also a full width. It is composed of a spiral.

When the splitter 40 is not divided into a full width but divided into several splitters 40a, the splitter 40a rotates for each section with respect to the width D of the solar panel 20 so that it is less than when rainwater falls. It scatters more effectively, and in addition, when the shape of the rotating blade is spirally formed, rainwater is scattered more effectively when the splitter 40b rotates.

In the present invention, the splitters 40, 40a, and 40b are axially coupled to the shaft bar 32 to rotate freely, but the splitters 40, 40a, and 40b may be forcibly rotated by electrical connection. . If it is electrically coupled, it is possible to give various rotational speed changes, so that the scattering of rainwater can be reduced and accelerated appropriately according to the situation.

5 shows the configuration of the solar panel 20 proposed in the present invention, and shows that a size of 1 m in width and 2 m in length can be used. This can be compared to the size of the sum of two of the conventional solar panel 200, and corresponds to a commercial module that is normally produced, thereby reducing the cost of parts.

However, when the solar panel 20 of the same size is lengthened in the vertical direction and coupled to the horizontal frame 11, the area may be somewhat wide and thus vulnerable to wind pressure.

Accordingly, the present invention takes a structure to reduce the wind pressure in strong winds.

That is, referring to FIG. 6, at least one windshield 50 is installed on the outermost part of the solar panel 20 and appropriately installed in consideration of the direction of the wind for each region.

The reason for installing the windshield 50 on the outermost side is that when the wind blows from the outside, the solar panel 20 located at the outermost side receives the most wind pressure, and the solar panel 20 located inside it receives the most wind pressure. It is due to the role of a shield.

As shown in FIG. 6, the windbreak membrane 50 is composed of unit membranes 52 in two top and bottom, so that the wind blowing from the outside does not go toward the solar panel 20 in a form that expands in a direction from the outside to the inside. Protect it by spreading it up and down.

The windbreak membrane 50 has pipes 60 disposed at the upper and lower portions of the inner side, and one pipe 60 is placed and fixed to the outer side of the windshield 50, and then passed through the pipe 60 on the outside using vinyl, etc. It can be implemented by a method of binding to the pipe 60 with a fixing clip 62.

Referring to FIGS. 7A and 7B, in the present invention, the farming solar power generation system 2 may increase the windproof effect by installing a fence-type net 70 as an outer periphery together with the windbreak membrane 50.

This allows the solar panel 20 to be more effectively protected even when the solar panel 20 is installed 3m or more from the ground, even when the direction of the strong wind goes from the bottom to the top. I think that a net with a lot of holes will not have a great effect on blocking the wind due to the holes. However, it may be said that the effect is insufficient when the wind blows gently, but when a strong wind blows, even a net with a hole has an effect of blocking the wind going to the solar panel 20 quite a bit.

This fact can be seen in cases where the supports installed on the golf course bend or fall over by strong winds. This would be a large factor due to the net installed between the supports to catch the golf ball. Conversely, it would block a large number of areas against strong winds, whether it was a net with holes or not.

In addition, the fence-type mesh 70 will fluctuate within the clearance range when strong wind blows, and such fluctuations have many effects in alleviating the intensity of the wind directly going to the solar panel 20.

In the present invention, in the installation of the fence-type net 70, as shown in the drawing, when an angle (θ) is formed at an angle (θ) outward with respect to a vertical line as shown in the drawing, it is more effective than the vertical fall. As mentioned above, this is effective when the direction of the strong wind goes from the bottom to the top, and prevents a large amount of wind by the fence-type net 70 and at the same time guides the direction of the wind to the top to escape. The angle θ may be set within 10 to 40°, and preferably within 25°.

When installing the fence-type net 70, a separate frame may be installed, but the upper end of the net 70 is fixed with a fixing clip 62 to the pipe 60 involved in the installation or a separate It can be fixed using a fixing means, and the lower end can be fixed by inserting it into the ground at regular intervals using a support pin 72.

As described above, the photovoltaic power generation structure 2 in parallel with the cultivation of crops on the farmland according to the embodiment of the present invention allows all crops grown under the solar panel 20 to receive evenly the sunlight corresponding to the light saturation point. The intermittent shade of the solar panel 20 provides a suitable resting place for crops to participate in good fruiting, and rainwater is scattered by the splitter 40 coupled to the lower end of the solar panel 20. It prevents the shape that only a specific part is dug away from the lower end of the photovoltaic panel in a vertical direction, and rainwater is supplied to the lower part of the solar panel to provide a balanced supply of rainwater.

In the above description of the present invention, specific embodiments have been described, but various modifications may be made without departing from the scope of the present invention. Therefore, the scope of the present invention should not be determined by the described embodiments, but should be determined by the claims and equivalents to the claims.

(2)--Agricultural solar power generation system
(10)--Vertical frame (11)--Horizontal frame
(20)--Solar panel (30)--Bracket
(32)--shaft rod (40)(40a)(40b)--splitter
(50)--Wind Shield (52)--Unit Film
(60)--pipe (62)--fixing clip
(70)--Fence type netting (72)--Supporting pin

Claims (5)

A plurality of vertical frames 10 are fixed upright on farmland at regular intervals, and a plurality of horizontal frames 11 are rigidly connected to each other with a fixing means such as a clamp, so that the lower part of the frame A space in which crops can be cultivated is provided, and the solar panel 20 is fixedly coupled to be arranged in the left and right directions,
Both brackets 30 are coupled to the bottom of one or more solar panels 20, and a shaft bar 32 extending left and right is coupled between the brackets 30, and a splitter 40 is freely attached to the shaft bar 32. When the rainwater falling on the solar panel 20 moves to the bottom and falls, the rainwater is scattered by the rotation of the splitter 40 so that water is supplied to the lower part of the solar panel 20 so that rainwater is supplied A farming solar power generation system, characterized in that a balanced supply is maintained, and a phenomenon in which only a specific part is digged by falling continuously in a vertical direction from the lower end of the solar panel 20 is prevented.
The method of claim 1,
The solar panel 20 has a longer length in the vertical direction compared to the horizontal direction and is arranged to be spaced apart from the left and right, and the solar panels 20 located in front and rear are arranged at alternate positions to form a zigzag shape as a whole,
The distance (L) between the solar panels 20 adjacent to the left and right is greater than or equal to the width (D) of the solar panel 20, and the maximum distance (L) is the width (D) of the solar panel 20 ) Not more than twice
During the daytime when the sun passes, the solar panel 20 suppresses the occurrence of the continuous shade of the crops and allows the crops grown under the solar panel 20 to receive the sunlight corresponding to the light saturation point evenly. An agricultural solar power generation system characterized in that the panel 20 temporarily avoids strong direct sunlight from the sun, so that it has a good effect on the growth of crops and enables the production of electricity.
The method of claim 1,
The splitter 40 is a farming type solar light, characterized in that a plurality of short splitters 40a are continuously fitted to the shaft bar 32 with respect to the width D of the solar panel 20. Power generation system.
The method of claim 1,
At the outermost part of the solar panel 20, a windshield 50 is installed on one or more sides to reduce strong wind pressure or change the direction of the wind,
The windbreak membrane 50 is in a shape that extends from the outside to the inside by using the unit membrane 52 in two top and bottom so that the wind blowing from the outside is not directed toward the solar panel 20 but spreads up and down to be protected. Farming type solar power generation system, characterized in that.
The method of claim 1,
Farming type solar power generation system, characterized in that the fence-type mesh 70 is installed outside the solar panel 20 to increase the windproof effect.

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