KR20210130071A - Vertical installation and bifacial photovoltaic module system that can adjust the power generation pattern using the optimal design of the reflector - Google Patents

Abstract

One embodiment of the present invention provides a vertical installation and bifacial light receiving photovoltaic module system capable of adjusting a power generation pattern using an optimal design of a reflector. The photovoltaic module system according to one embodiment of the present invention includes a reflector driving control unit adjusting solar power generation pattern by controlling the angle of the reflector, and a reflective plate connected to the reflective plate driving control unit to control an angle formed with the module support unit through the reflective plate driving control unit. One embodiment of the present invention due to the characteristics of the configuration as described above provide the photovoltaic module system to secure power generation at noon with the highest insolation through the optimal design of a reflector that maximizes power generation efficiency while using a vertically installed solar module system with high space utilization, and to control the pattern of the amount of power generation according to the amount of insolation and the amount of electricity required through the control of the reflector.

Description

Vertical installation and bifacial photovoltaic module system that can adjust the power generation pattern using the optimal design of the reflector

The present invention relates to a vertically installed double-sided light-receiving photovoltaic module system, and more particularly, to a vertically-installed double-sided light-receiving photovoltaic module system capable of controlling a power generation pattern using an optimal design of a reflector.

Photovoltaic power generation is a power generation technology that collects the light energy of the sun as an electrode through a solar cell composed of a semiconductor material and generates electricity by collecting electrons/holes generated by sunlight on the light receiving surface. It is spotlighted as a core new and renewable energy technology for achieving '3020'.

Conventionally, electric power was generally produced using single-sided solar cells or single-sided solar modules using opaque white backsheets. There was a problem in that it was difficult to secure power generation in the morning and afternoon when the incident amount was low.

In order to solve this problem, a double-sided light-receiving type photovoltaic module system with improved power generation efficiency in the same space has recently emerged.

The double-sided light-receiving photovoltaic module is characterized in that it is designed to generate electricity by absorbing light even to the rear side using a double-sided light-receiving solar cell and a transparent back sheet or glass. Therefore, it is possible to secure power generation performance while using a small space when installing vertically, and has the advantage that power generation is possible both in the morning and in the afternoon.

1 is a graph showing the change in the amount of sunlight incident over time of a conventional single-sided light-receiving solar module installed in a south-facing inclined type and a double-sided light-receiving solar module installed vertically in the east-west direction.

Referring to FIG. 1 , it can be confirmed that the double-sided light-receiving type photovoltaic module has the advantage of generating power in both the morning and the afternoon compared to the conventional single-sided light-receiving photovoltaic module in addition to the space utilization that enables efficient power generation using a limited space. .

However, since the vertically installed double-sided solar module does not face the sun near noon, there is a problem that the sunlight at noon with the greatest amount of insolation cannot be fully utilized.

Republic of Korea Patent Publication No. 10-2019-0102204

The technical problem to be achieved by the present invention is to provide a solar module system that can secure sufficient power generation performance while having high space utilization, and can control the pattern of generation amount according to the amount of insolation and required power through the control of the reflector.

The technical problems to be achieved by the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned can be clearly understood by those of ordinary skill in the art to which the present invention belongs from the description below. There will be.

In order to achieve the above technical problem, an embodiment of the present invention provides a vertically installed double-sided light-receiving type photovoltaic module system capable of controlling a power generation pattern using an optimal design of a reflector.

The vertically installed double-sided light-receiving solar module system capable of controlling the power generation pattern using the optimal design of the reflector includes: a double-sided light-receiving photovoltaic module unit positioned perpendicular to the ground; a module support for supporting the solar module to be spaced apart from the ground; a reflector driving control unit located at a lower portion of the module support and spaced apart from the ground, and controlling the angle of the reflector to adjust the solar power generation pattern; and a reflective plate connected to the reflective plate driving control unit to control an angle formed with the module support unit through the reflective plate driving control unit.

The double-sided light-receiving photovoltaic module unit includes a plurality of double-sided light-receiving solar cells; a sealing material sealing both sides of the double-sided light-receiving solar cell; back sheets disposed on both sides of the double-sided light-receiving solar cell on the sealing material; wherein the sealing material and the back sheet are each independently made of a transparent material, so that the double-sided light-receiving solar module unit emits light from both sides It can receive light and make power generation possible.

The reflector driving control unit may include: a generation amount data receiving unit configured to receive generation amount data in real time; and a power generation data analysis unit for analyzing the generation amount data received through the generation amount data receiving unit, wherein the solar module unit power generation pattern by controlling the angle of the reflector based on the generation amount data analyzed by the generation amount data analysis unit can be adjusted.

The reflector driving control unit may be positioned to be spaced apart by the length of the double-sided light-receiving photovoltaic module unit and the reflector so that the reflector does not cover the double-sided light-receiving photovoltaic module unit.

The reflective plate may include a first reflective plate positioned on an upper portion; and a second reflective plate positioned at a lower portion thereof, wherein the first reflective plate and the second reflective plate slide with each other and may have a slide structure in which the length can be adjusted.

The reflector may be made of a metal material selected from the group consisting of aluminum, tin plate, and stainless steel.

The reflector may be painted with white paint to increase reflectivity.

The reflector may be controlled to have an angle of 0 to 180 degrees with respect to the height direction of the module support part through the reflector driving control unit.

According to an embodiment of the present invention, a solar module system capable of securing power generation at noon with the greatest amount of insolation through an optimal design of a reflector that can maximize power generation efficiency while using a vertically installed photovoltaic module system with high space utilization can provide

In addition, according to an embodiment of the present invention, it is possible to provide a solar module system capable of controlling the pattern of the amount of power generation according to the amount of insolation and the amount of power required through the control of the reflector.

It should be understood that the effects of the present invention are not limited to the above-described effects, and include all effects that can be inferred from the configuration of the invention described in the detailed description or claims of the present invention.

1 is a graph showing the change in the amount of sunlight incident upon time of a conventional single-sided light-receiving photovoltaic module installed in a south-facing inclined type and a double-sided light-receiving photovoltaic module installed vertically in the east-west direction.
2 is a schematic diagram schematically showing a solar module system according to an embodiment of the present invention.
3 is a schematic diagram schematically showing a reflector of the present invention.
4 is a graph showing the amount of insolation and power generation during a day of the vertical installation type single-sided and double-sided light-receiving type solar module system.
5 is a table showing the amount of insolation and power generation during a day of the vertically installed single-sided and double-sided light-receiving type photovoltaic module system.
6 is a graph showing the amount of insolation and daily cumulative power generation for one month of the vertically installed single-sided and double-sided light-receiving type solar module system.
7 is a graph showing the amount of insolation and power generation according to time of day of the solar module system of Comparative Example 1. Referring to FIG.
8 is a graph showing the amount of insolation and power generation according to time of day of the solar module system according to Preparation Example 1. FIG.
9 is a graph showing the amount of insolation and generation according to time of day of the solar module system according to Preparation Example 2;

Hereinafter, the present invention will be described with reference to the accompanying drawings. However, the present invention may be embodied in several different forms, and thus is not limited to the embodiments described herein. And in order to clearly explain the present invention in the drawings, parts irrelevant to the description are omitted, and similar reference numerals are attached to similar parts throughout the specification.

Throughout the specification, when a part is said to be “connected (connected, contacted, coupled)” with another part, it is not only “directly connected” but also “indirectly connected” with another member interposed therebetween. "Including cases where In addition, when a part "includes" a certain component, this means that other components may be further provided without excluding other components unless otherwise stated.

The terms used herein are used only to describe specific embodiments, and are not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present specification, terms such as “comprise” or “have” are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, but one or more other features It should be understood that this does not preclude the existence or addition of numbers, steps, operations, components, parts, or combinations thereof.

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

A solar module system according to an embodiment of the present invention will be described.

2 is a schematic diagram schematically showing a solar module system according to an embodiment of the present invention.

Referring to FIG. 2 , the photovoltaic module system according to an embodiment of the present invention includes: a double-sided light-receiving photovoltaic module unit 100 positioned perpendicular to the ground with respect to a horizontal plane of a substrate; a module support 200 for supporting the solar module to be spaced apart from the ground; a reflector driving control unit 300 located at a lower portion of the module support and spaced apart from the ground, and adjusting the solar power generation pattern by controlling the angle of the reflector; and a reflective plate 400 connected to the reflective plate driving control unit to control an angle formed with the module support unit through the reflective plate driving control unit.

The double-sided light-receiving solar module unit 100 includes a plurality of double-sided light-receiving solar cells; a sealing material sealing both sides of the double-sided light-receiving solar cell; and a back sheet disposed on both sides of the double-sided light-receiving solar cell on the sealing material.

In this case, the sealing material and the back sheet may be each independently made of a transparent material.

Therefore, since the double-sided light-receiving photovoltaic module unit 100 receives sunlight from both sides to generate power, when the double-sided light-receiving photovoltaic module is installed perpendicularly to the ground in the east-west direction, limited space It has the advantage of being able to generate power both in the morning and in the afternoon as well as the space utilization that enables efficient power generation using However, unlike single-sided photovoltaic modules that are optimized to receive a lot of sunlight near noon, when the amount of insolation is highest, in the case of a double-sided photovoltaic module installed vertically, it does not face the sun at noon, so the amount of incident sunlight is decreased, and it is not possible to secure enough power generation at noon when the incident amount is the highest, which is a huge loss.

Accordingly, the inventors of the present invention include the reflector 400 and the reflector drive control unit 300 for controlling the driving of the reflector, thereby maximizing light absorption in the morning and afternoon as well as around noon, thereby controlling the pattern of the amount of power generation This led to the invention of a vertically installed double-sided light-receiving type solar module system using the optimal design of the reflector.

The reflector driving control unit 300 may include: a power generation data receiver configured to receive power generation data in real time; and a power generation data analysis unit that analyzes the generation amount data received through the generation amount data receiving unit.

Therefore, based on the power generation data analyzed by the power generation data analysis unit, the reflector driving control unit 300, depending on the incident angle of sunlight, has a large amount of incident light to the double-sided light receiving solar module unit 100. Adjust the angle of the reflector 400 to reduce the amount of sunlight reflected from the reflector 400 to the double-sided light-receiving type photovoltaic module unit 100, or as sunlight enters vertically at noon When the amount of sunlight incident on the double-sided light-receiving solar module unit 100 is small, the angle of the reflector 400 is adjusted to reflect the amount of sunlight reflected from the reflector to the double-sided light-receiving photovoltaic module unit 100 . The angle of the reflector 400 may be controlled to increase.

As described above, by adjusting the angle of the reflector according to the real-time power generation data as described above, the pattern of power generation can be adjusted so that the required power generation can be secured according to the power consumption regardless of the position of the sun, that is, the time of day and the incident angle of sunlight. A solar module system can be provided.

Also, the reflector driving control unit 300 may be positioned to be spaced apart from the double-sided light-receiving solar module unit 100 by the length of the reflector 400 .

Due to the above configuration, it is possible to prevent the reflector 400 from blocking the double-sided light-receiving type photovoltaic module unit 100 from interfering with sunlight incident on the module unit, and the reflector 400 is the module support unit. An angle formed with the height direction of may be controlled to form 0 to 180 degrees. Accordingly, by controlling the angle between the reflector and the height direction of the module support to be 90 to 180 degrees, it is possible to increase the amount of reflection of sunlight reaching the solar module, as well as to increase the amount of sunlight reflected by the reflector in the module support. By controlling the angle formed with the height direction to form 0 degrees to 90 degrees, it can also be adjusted in a direction to reduce the amount of reflection of sunlight reaching the solar module unit.

3 is a schematic diagram schematically showing a reflector 400 of the present invention.

Referring to FIG. 3 , the reflecting plate 400 of the present invention includes a first reflecting plate 410 positioned on the upper portion; and a second reflecting plate 420 positioned at a lower portion thereof, wherein the first reflecting plate and the second reflecting plate slide with each other and have a slide structure in which the length can be adjusted.

Due to the above configuration, the length of the reflector 400 may be controlled by controlling sliding of the first and second reflectors by the reflector driving controller 300 .

Therefore, in real time, when the amount of solar power generation is large, the length of the reflector can be shortened to reduce the amount of sunlight reflected, and when the amount of solar power is small, the pattern of the amount of power generation can be adjusted by lengthening the length of the reflector and increasing the amount of sunlight reflection. .

In addition, the reflector 400 may be made of a metal material selected from the group consisting of aluminum, tin plate, and stainless steel.

By using a reflector made of a metal material that can be used semi-permanently at a low cost as described above, it is possible to provide an economically usable solar module system.

In addition, the reflector 400 may be painted with white paint to increase reflectivity.

In this case, the color of the paint is not limited to white, and any color capable of increasing the reflection efficiency of the reflector may be used without limitation.

According to an embodiment of the present invention, a solar module system capable of securing power generation at noon with the greatest amount of insolation through an optimal design of a reflector that can maximize power generation efficiency while using a vertically installed photovoltaic module system with high space utilization can provide

In addition, according to an embodiment of the present invention, it is possible to provide a solar module system capable of controlling the pattern of the amount of power generation according to the amount of insolation and the amount of power required through the control of the reflector.

Hereinafter, the present invention will be described in more detail through Preparation Examples, Comparative Examples and Experimental Examples. However, the present invention is not limited to the following Preparation Examples and Experimental Examples.

<Production Example 1> Solar module system with tin reflector installed

First, a vertically installed single-sided and double-sided light-receiving type solar module system was manufactured using a tin plate as a reflector.

Table 1 is a table showing the performance specifications of the sunlight used in the embodiment of the present invention.

[Table 1]

When describing the performance specifications of the solar module used in the experimental example of the present invention with reference to Table 1, after connecting three n-PERT type 72-cell single-sided and double-sided modules each with a power generation of 400W class in series The experiment was carried out. Other components consisted of two vertical (East, West) insolation meters and one horizontal insolation meter, a total of three insolation meters and an electronic load. Kipp&Zonen's CMP3 and CMP6 were used for vertical (East, West) and horizontal insolation meters, respectively, and the electronic load was installed with ODA's technology LF-2400C (600V, 80A, 2400W). The photovoltaic module was installed vertically in the east-west direction, and the front side was installed to face the west.

<Production Example 2> Solar module system with white paint reflector installed

A vertically installed single-sided and double-sided light-receiving solar module system was manufactured in the same manner as in Preparation Example 1, except that a white painted reflector was used as the reflector.

<Comparative Example 1> Solar module system without a reflector installed

A vertically installed single-sided and double-sided light-receiving solar module system was manufactured in the same manner as in Preparation Example 1, except that the reflector was not padded.

<Experimental Example 1> Comparison of power generation of vertically installed single-sided and double-sided solar module systems

First, an experiment was conducted to compare the amount of power generation over time between the vertically installed single-sided light-receiving solar module system and the vertically installed double-sided light-receiving solar module system.

4 is a graph showing the amount of insolation and power generation during a day of the vertically installed single-sided and double-sided light-receiving type photovoltaic module system.

5 is a table showing the amount of solar radiation and accumulated power generation during a day of the vertically installed single-sided and double-sided light-receiving type photovoltaic module system.

With reference to FIGS. 4 and 5, the daily insolation and power generation patterns of the vertically installed single-sided and double-sided light-receiving photovoltaic module system will be described.

Referring to FIG. 4 , what is clearly distinguished first is that the power generation graph of the double-sided module has two peaks, generating power in the morning and afternoon and decreasing the power generation at noon, and the single-sided module generates normal power generation after noon in the afternoon, but in the morning It can be seen that the power generation is less than 20% of the maximum power generation in the afternoon. This is because, in the case of a double-sided module, power generation is possible on both sides, but in the case of a single-sided module, only single-sided power generation is possible. At this time, in the case of a single-sided module, the front face is installed to face the west, but partial power generation is possible even in the morning when the sun is in the east. This is because it is possible to generate electricity with reflected light. Although it varies depending on the region and climate, in general, the percentage of insolation on a clear and cloudless day consists of 85% direct lunar insolation + 15% scattering insolation.

4 and 5, the accumulated power generation in the morning is 2.44 kWh for the double-sided module string and 0.75 kWh for the single-sided module string, and the Bifacial Gain Energy (BGE) is 225.33%, and the accumulated power generation in the afternoon is that of the double-sided module string. The case was 4.34 kWh, for the single-sided module string was 3.83 kWh, and the BGE was 13.32%. In total, the cumulative power generation of the double-sided module string was 6.78 kWh and the single-sided module string was 4.58 kWh, confirming that the double-sided module recorded 48% more power than the single-sided module.

6 is a graph showing the amount of insolation for one month and the accumulated amount of power generation per day of the vertically installed single-sided and double-sided light-receiving type photovoltaic module system.

Referring to FIG. 6 , it can be seen that the double-sided module recorded about 41.9% more power generation compared to the single-sided module.

Therefore, in the same vertically installed solar module system, it can be confirmed that the double-sided light-receiving type records more power than the single-sided light-receiving type.

<Experimental Example 2> Comparison of power generation of vertically installed single-sided and double-sided solar module systems depending on whether or not a reflector is installed

An experiment was conducted to compare the amount of power generation according to whether or not a reflector was installed in the vertical installation type single-sided and double-sided light-receiving type photovoltaic module systems.

7 is a graph showing the amount of power generation according to time of day of the solar module system of Comparative Example 1. Referring to FIG.

8 is a graph showing the amount of power generation according to time of day of the solar module system according to Preparation Example 1. Referring to FIG.

9 is a graph showing the amount of power generation according to time of day of the solar module system according to Preparation Example 2;

7 to 9, it can be seen that the double-sided light-receiving type solar module system using a white painted reflector as a reflector secures the highest amount of power generation near noon compared to when a reflector is not provided or a tin reflector is used. It can be seen that the amount of power generation also increased by 59.69% compared to the single-sided light receiving type, showing the highest increase.

Therefore, in the vertically installed double-sided light receiving type solar module system according to an embodiment of the present invention, it is possible to adjust the power generation pattern over time by improving the power generation performance higher than that of the single side light receiving type and securing the power generation near noon. have.

The above description of the present invention is for illustration, and those of ordinary skill in the art to which the present invention pertains can understand that it can be easily modified into other specific forms without changing the technical spirit or essential features of the present invention. will be. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive. For example, each component described as a single type may be implemented in a distributed manner, and likewise components described as distributed may be implemented in a combined form.

The scope of the present invention is indicated by the following claims, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention.

100: double-sided light-receiving type solar module unit
200: module support
300: reflector driving control unit
400: reflector 410: first reflector 420: second reflector

Claims (8)

a double-sided light-receiving type solar module unit positioned perpendicular to the ground;
a module support for supporting the solar module to be spaced apart from the ground;
a reflector driving control unit located at a lower portion of the module support and spaced apart from the ground, and adjusting the solar power generation pattern by controlling the angle of the reflector; and
A vertically installed double-sided light-receiving type solar module system capable of controlling a power generation pattern using an optimal design of a reflector comprising a; a reflector connected to the reflector driving control unit, the angle formed with the module support unit is controlled through the reflector driving control unit.
According to claim 1,
The double-sided light-receiving type solar module unit,
a plurality of double-sided light-receiving solar cells;
a sealing material sealing both sides of the double-sided light-receiving solar cell;
and a back sheet disposed on both sides of the double-sided light-receiving solar cell on the sealing material;
The sealing material and the back sheet are each independently made of a transparent material, so that the double-sided light-receiving type photovoltaic module unit receives light from both sides to enable power generation. Double-sided light-receiving type photovoltaic module system.
According to claim 1,
The reflector driving control unit may include: a generation amount data receiving unit configured to receive generation amount data in real time; and a power generation data analysis unit that analyzes the power generation data received through the power generation data receiving unit.
Vertically installed double-sided light-receiving type solar capable of adjusting the power generation pattern using the optimal design of the reflector, characterized in that by controlling the angle of the reflector based on the power generation data analyzed by the power generation data analysis unit, the power generation pattern of the solar module unit is adjusted optical module system.
According to claim 1,
The reflector driving control unit, the amount of power generation pattern control using the optimal design of the reflector, characterized in that the reflector is positioned spaced apart by the length of the double-sided light-receiving type photovoltaic module unit and the reflector so that the reflector does not cover the double-sided light-receiving type photovoltaic module unit Vertically installed double-sided light-receiving solar module system.
According to claim 1,
The reflective plate may include a first reflective plate positioned on an upper portion; and a second reflecting plate located at the lower portion;
The first reflector and the second reflector are vertically installed double-sided light-receiving solar panels capable of adjusting the power generation pattern using an optimal design of a reflector, characterized in that the length can be adjusted by being controlled to slide with each other through the driving control unit. optical module system.
According to claim 1,
The reflector is a vertically installed double-sided light-receiving solar module system capable of controlling the power generation pattern using an optimal design of the reflector, characterized in that it is made of a metal material selected from the group consisting of aluminum, tin plate and stainless steel.
According to claim 1,
The reflector is a vertically installed double-sided light-receiving type solar module system capable of controlling the power generation pattern using an optimal design of the reflector, characterized in that it is painted with white paint to increase the reflectivity.
According to claim 1,
The reflector is a vertically installed double-sided light-receiving type solar module capable of controlling a power generation pattern using an optimal design of the reflector, characterized in that the angle formed with the height direction of the module support can be controlled from 0 to 180 degrees through the reflector driving control unit system.

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