Agricultural solar power generation system using double-structured light diffusion plate

Abstract

Disclosed is an agricultural solar power generation system. The agricultural solar power generation system comprises: solar modules; solar module mounting structures for mounting the solar modules; a solar support structure for supporting the solar module mounting structures; and a light diffusion plate disposed between the solar module mounting structures. The light diffusion plate is formed of a composite of thermoplastic polyurethane and polymethyl methacrylate.

Description

Agri-photovoltaic power generation system utilizing a double-layered light diffuser

[0001] The present invention relates to an agricultural photovoltaic power generation system utilizing a double-structured light diffuser, and more specifically, to an agricultural photovoltaic power generation system utilizing a double-structured light diffuser for securing the required illumination for underlying crops.

[0002] An agrophotovoltaic (APR) system refers to a system that simultaneously generates solar power while cultivating crops on farmland. Crops grown on farmland may not be able to secure the necessary light intensity due to solar power structures. Therefore, an APR system is required to resolve this problem.

[0003] The technical problem that the present invention aims to solve is to provide an agricultural solar power generation system utilizing a double-structured light diffuser plate to secure the necessary illumination for the lower crops.

[0004] An agricultural photovoltaic power generation system according to an embodiment of the present invention comprises photovoltaic modules, photovoltaic module mounting structures for mounting the photovoltaic modules, a photovoltaic support structure for supporting the photovoltaic module mounting structures, and a light diffuser plate positioned between the photovoltaic module mounting structures. The light diffuser plate is made of a composite of thermoplastic polyurethane and polymethyl methacrylate.

[0005] The agricultural solar power generation system according to an embodiment of the present invention has the effect of securing the necessary illumination for the lower crops by proposing a double-structured light diffuser.

[0006] FIG. 1 is a block diagram of an agricultural photovoltaic power generation system according to an embodiment of the present invention.

[0007] Burns.

[0008] Figure 2 shows a block diagram of the light diffuser plate illustrated in Figure 1.

[0009] FIG. 3 is a drawing showing an agricultural solar power generation system according to another example of the present invention.

[0010] FIG. 4 is a drawing showing a light diffusion plate according to another example of the present invention.

[0011] Figure 5 is a diagram showing the state in which the light diffusion plate of Figure 4 is arranged.

[0012]

[0013] The agricultural photovoltaic power generation system of the present invention comprises photovoltaic modules; photovoltaic module mounting structures for mounting the photovoltaic modules; photovoltaic support structures for supporting the photovoltaic module mounting structures; and a light diffusion plate positioned between the photovoltaic module mounting structures, wherein the light diffusion plate is made of a composite of thermoplastic polyurethane and polymethyl methacrylate.

[0014]

[0015] Specific structural or functional descriptions regarding embodiments according to the concept of the present invention disclosed herein are provided merely for the purpose of explaining embodiments according to the concept of the present invention, and embodiments according to the concept of the present invention may be implemented in various forms and are not limited to the embodiments described herein.

[0016] Embodiments according to the concept of the present invention may be subject to various modifications and may take various forms; therefore, embodiments are illustrated in the drawings and described in detail in this specification. However, this is not intended to limit the embodiments according to the concept of the present invention to specific disclosed forms, and includes all modifications, equivalents, or substitutions that fall within the spirit and scope of the present invention.

[0017] The terms used herein are used merely to describe specific embodiments and are not intended to limit the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this specification, terms such as “comprising” or “having” are intended to indicate the existence of the described features, numbers, steps, actions, components, parts, or combinations thereof, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0018] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by those skilled in the art to which the present invention pertains. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an ideal or overly formal sense unless explicitly defined in this specification.

[0019] Hereinafter, the present invention will be described in detail by explaining preferred embodiments of the present invention with reference to the attached drawings.

[0020] Figure 1 shows a block diagram of an agricultural photovoltaic power generation system according to an embodiment of the present invention.

[0021] Referring to FIG. 1, an agrophotovoltaic power generation system comprises solar modules, solar module mounting structures for mounting the solar modules, solar support structures for supporting the solar module mounting structures, and a light diffusion plate located between the solar module mounting structures.

[0022] As shown in FIG. 1, the agricultural solar power generation system (1) of the present invention includes a plurality of solar modules (10). The solar modules (10) are formed by attaching a plurality of solar cell panels to the frame of the solar modules.

[0023] The solar module mounting structure (20) is a structure for mounting the solar module, and the solar support structure (30) is a structure for supporting the solar module mounting structure on the ground.

[0024] In the embodiment of FIG. 1, the solar module mounting structure (20) and the solar support structure are exemplified as being formed in the shape of a channel or bar, but as shown in FIG. 3, they can be composed of a tower structure and wires to form a longer span structure.

[0025] As shown in FIG. 3, the solar support structure may be formed into a tower-shaped structure. In this embodiment, the tower-shaped support structure is named a solar tower (31). The solar tower (31) is installed upright on the ground and a plurality of them are installed at regular intervals. The solar tower (31) is configured more stably by having a column that is narrow at the top and wide at the bottom, and a tension control device (32) is provided at the top of the column to wind a wire and adjust the tension of the wire. The tension control device (32) may include a rail and a roller that slides along the rail to enable sliding movement, and may include a bobbin on which the wire is wound. The solar tower is formed with a ladder attached so that a user or manager can access the tension control device for maintenance, etc.

[0026] In this embodiment, the solar module (10) is connected to a wire (21) to be supported and moved. The wire (21) is connected to and supported by a wire fixing part (33) formed on the upper part of the solar tower.

[0027] The above wire (21) includes an upper wire (21a) and a lower wire (21b) installed at regular intervals in the vertical direction, and the upper wire and the lower wire, each installed on a plurality of solar towers, are each connected to the wire fixing part and the tension adjustment device, and are connected while changing direction at each solar tower.

[0028] The upper wire (21a) is connected to both ends along the longitudinal direction of the long side of the frame of the solar module and to the wire fixing part, and the lower wire (21b) is connected to both ends along the longitudinal direction of the other long side of the frame of the solar module and to the tension adjustment device. When the lower wire (21b) is slid back and forth by driving the tension adjustment device, one side of the solar module is fixed to the upper wire, so the angle of the solar module can be adjusted.

[0029]

[0030] A light diffusion plate (40) is installed between the solar modules on the lower wire (21b).

[0031] FIG. 2 is a drawing showing an example of the light diffusion plate of the present invention. FIG. 2 shows a block diagram of the light diffusion plate illustrated in FIG. 1.

[0032] Referring to FIGS. 1 and 2, the light diffuser plate (40) is implemented as a composite of thermoplastic polyurethane and methyl polymethacrylate. The light diffuser plate includes an upper layer, a composite layer, and a lower layer. The composite layer comprises the highly permeable composite containing a diffusing agent.

[0033] Polymethyl methacrylate (PMMA) possesses excellent transparency, high surface hardness, and superior weather resistance. Additionally, thermoplastic polyurethane (TPU) is flexible and highly elastic, offers excellent shock absorption and wear resistance, possesses characteristics of both rubber and plastic, and provides a soft texture.

[0034] In this embodiment, the thermoplastic polyurethane and polymethylcryl methacrylate are mixed in a ratio of 80:20 to 95:5 (mass ratio of PMMA to TPU) to form a single material with new physical properties.

[0035] The main features obtained by using these two materials together are as follows.

[0036] Enhanced Impact Resistance: Flexible TPU compensates for the low impact strength, a disadvantage of rigid PMMA, significantly improving the overall impact resistance of the material.

[0037] Excellent transparency and appearance: By maintaining the high transparency of PMMA while adding the flexibility of TPU, it is possible to secure both a beautiful appearance and functionality simultaneously.

[0038] Flexibility and Durability: Thanks to the elasticity of TPU, the product does not easily break or deform and has the resilience to return to its original shape.

[0039] Generally, a ratio between 60:40 and 70:30 (PMMA:TPU) is a good starting point for a balance of transparency and impact resistance, and the ratio of PMMA can be increased up to 80:20 depending on the specific application.

[0040] In this embodiment, the most suitable ratio for the purpose of a light diffuser plate for an agricultural photovoltaic power plant is 80:20 to 95:5 (mass ratio of PMMA to TPU). This is because transparency and surface hardness are maintained as the PMMA content increases, and the impact strength of PMMA is significantly reduced when the TPU content is less than 5%. Thus, high transparency and scratch resistance can be secured.

[0041] The light diffusion plate comprises a light diffusion plate body (41) forming the composite layer and a light diffusion section (42) formed at the bottom of the light diffusion plate body. The light diffusion section (42) is formed, for example, of a high-performance thermoplastic plastic of the fluoropolymer series, and diffuses sunlight irradiated onto the light diffusion plate body (41) toward crops below.

[0042]

[0043] FIGS. 4 and FIGS. 5 are drawings showing other examples of the light diffusion plate of the present invention.

[0044] The light diffusion plate (40) shown in FIGS. 4 and 5 includes a light diffusion section (42) formed at a certain interval on the light diffusion plate body (41).

[0045] In this embodiment, the light diffusion part (42) includes an upper plate (42a), an inner reflector (42b), and a lower diffusion plate (42c).

[0046] The upper plate (42a) is configured such that its outer surface is formed convexly toward the upper side in a dome shape, allowing the sunlight to be smoothly guided toward the inner side even when sunlight is irradiated toward the light diffusion plate from various angles depending on the position of the sun. Additionally, the inner surface of the upper plate is formed by being folded into a convex polygonal shape toward the upper side, thereby stably guiding the sunlight guided by the dome-shaped outer surface of the upper plate into the interior of the light diffusion section.

[0047] An internal reflector (42b) is formed at the bottom of the upper plate, guiding sunlight irradiated into the interior of the light diffusion section toward the lower diffusion plate.

[0048] The lower diffuser plate (42c) formed at the bottom of the inner reflector plate is formed in the shape of a concave lens, so that sunlight directed toward the lower diffuser plate is widely diffused toward the crops below.

[0049] With the above configuration, the light diffusion plate according to the present invention can efficiently concentrate irradiated sunlight and widely diffuse it toward crops below, thereby improving the efficiency of light transmission.

Claims

1. Solar modules; Solar module mounting structures for mounting the above solar modules; A solar support structure for supporting the solar module mounting structures; and a light diffuser plate positioned between the solar module mounting structures, The above light diffusion plate is an agrophotovoltaic power generation system implemented with a composite of thermoplastic polyurethane and methyl polymethacrylate.

2. In Paragraph 1, The light diffusion plate above is a polymer mixed with polymethyl methacrylate and thermoplastic polyurethane in a mass ratio of 80:20 to 95:5 (PMMA:TPU), and An agricultural photovoltaic power generation system characterized by having a dome-shaped light-diffusing section formed of fluoropolymer-based thermoplastic plastic formed on the bottom surface of the light-diffusing plate.

3. In Paragraph 1, The above-mentioned solar module mounting structure is a solar tower, and the above-mentioned solar support structure is a wire, and The above wire includes an upper wire and a lower wire spaced apart from the upper wire at a certain distance in the vertical direction. The above solar tower is, A wire fixing part supporting the upper wire on the upper part, and An agricultural photovoltaic power generation system characterized by including a tension control device disposed at the lower part of the wire fixing part, which supports the lower wire and adjusts the tension of the lower wire while sliding the lower wire.

4. In Paragraph 3, The light diffusion plate comprises a light diffusion plate body supported by the lower wire and a light diffusion section formed at a certain distance from the light diffusion plate body. The above light diffusion unit is, The top plate and, An internal reflector disposed at the lower part of the upper plate, which guides sunlight irradiated into the interior of the light diffusion part toward the lower side, and An agricultural solar power generation system characterized by including a lower diffuser plate formed at the bottom of the inner reflector plate and formed in the shape of a concave lens, which diffuses sunlight directed toward the lower diffuser plate toward crops below.

5. In Paragraph 4, An agricultural solar power generation system characterized in that the upper plate has an outer surface formed convexly toward the upper side in a dome shape, and an inner surface formed by folding convexly toward the upper side in a polygonal shape to guide sunlight irradiated toward the light diffusion plate into the interior of the light diffusion section.

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