KR20200005512A - Artificial Turf for Photovoltaic Power Generation - Google Patents

Abstract

The present invention reflects incident light to a solar cell module and comprises a bubble layer, a plurality of pile parts tufted to the bubble layer, and a backing layer connected to the bubble layer and the pile part, and preventing separation of the pile part, wherein the bubble layer, the pile part or the backing part comprises a white region. According to an embodiment of the present invention, the light reflectivity can be increased by a white pile portion, the bubble layer, and the backing layer of artificial turf for solar light generation.

Description

Artificial Turf for Photovoltaic Generation {Artificial Turf for Photovoltaic Power Generation}

The present invention relates to an artificial turf for solar light.

Photovoltaic power generation, which converts light energy into electrical energy using a photoelectric conversion effect, is widely used as a means of obtaining pollution-free energy. With the improvement of the photoelectric conversion efficiency of a solar cell, the photovoltaic power generation system which uses many solar cell modules is installed also in a private house. The solar cell includes a substrate and an emitter portion forming a p-n junction with the substrate, and generates a current using light incident through one side of the substrate. Conventional solar cells have low current conversion efficiency because light is incident only through one side of the substrate. Thus, recently, double-sided light receiving solar cells have been developed in which light is incident through both sides of a substrate. Light is incident on the upper and lower surfaces while the double-sided light receiving solar cell module is installed in a building, an open field (hereinafter, referred to as the ground). In the case of the lower surface, the light reflected from the ground is incident.

The ground on which the double-sided light receiving solar cell module is installed may be concrete ground or open ground.

Concrete ground has excellent grass-proofing performance and reflecting ability, but the cost of installation is low and economic efficiency is low, and when it is installed in large area, drainage is unilaterally generated due to unilateral drainage due to heavy rain or rainy season. Loss and collapse occurs. In addition, in the case of the concrete ground, but using a method of applying a bright color paint on the concrete surface, there is a problem that the cost due to the paint is increased.

The open land can be constructed at no special cost, but its low reflectance is not suitable for the development of double-sided light receiving solar cell modules. In addition, management costs continue to be incurred because we have to continue to manage herbicides.

Patent No. 10-0898466. (2009.05.12.) Utility Model Registration No. 20-0240689. (2001.07.19.)

The present invention provides a technology to increase the photovoltaic power generation efficiency by maximizing the light reflected by the artificial grass installed on the ground to the solar cell module.

The artificial turf for solar cells according to an embodiment of the present invention includes a bubble layer, a plurality of pile parts having pile yarns tufted on the bubble layer, and a backing layer disposed on the bubble layer and preventing separation of the pile parts. The pile part, the bubble layer, or the backing layer includes a white area.

The pile yarn may include a first yarn and a second yarn, the first yarn and the second yarn may have different colors, and the colors of the first yarn and the second yarn may have different light reflectances.

The first yarn and the second yarn may be mixed together and tufted to the bubble layer to form the pile part.

The first yarn and the second yarn may be adjacent to each other to be tufted to the bubble layer to form the pile part.

The bubble layer may be partitioned into a plurality of regions, and the first yarn or the second yarn may be tufted in each region to form the pile part.

The pile yarn, 92 to 98 parts by weight of at least one resin selected from the group consisting of linear low density polyethylene, low density polyethylene, medium density polyethylene, high density polyethylene, polyamide and combinations thereof, 0.5 to 1 part by weight of flame retardant, 0.1 to 1 weight of wax Part, 0.1 to 1 part by weight of antioxidant and 0.1 to 3 parts by weight of titanium dioxide.

The pile yarn 92 to 98 parts by weight of at least one resin selected from the group consisting of linear low density polyethylene, low density polyethylene, medium density polyethylene, high density polyethylene, polyamide and combinations thereof, 0.5 to 1 parts by weight of flame retardant, 0.1 to 1 parts by weight of wax It may include 0.1 to 1 parts by weight of antioxidant, 0.1 to 1 parts by weight of titanium dioxide, 0.5 to 2 parts by weight of yellow pigment and 0.1 to 1 parts by weight of green pigment.

The bubble layer comprises a yarn made of polyethylene terephthalate and titanium dioxide, the fineness of the yarn is 1000 to 1500 denier, the warp density is 23 to 25 / inch and the weft density is 21 to 24 / inch Can be.

The bubble layer may include 97 to 99.5 parts by weight of the polyethylene terephthalate and 0.5 to 3 parts by weight of titanium dioxide.

The backing layer may include 15 to 25 parts by weight of at least one resin selected from the group consisting of styrene butadiene rubber, ethylene vinyl acetate copolymer, polyurethane, acrylic, polypropylene, polyethylene, and combinations thereof, and 49 to 53.5 weight of calcium carbonate. Parts, 20 to 30 parts by weight of water, 0.5 to 2 parts by weight of additives, and 0.5 to 5 parts by weight of titanium dioxide.

The backing layer may further include any one selected from the group consisting of glyphosate, glyphosinate, oxadione, asulam, and combinations thereof.

The backing layer may have a thickness of about 100 μm to about 5 mm.

The pile yarn of the pile portion, the bubble layer or the backing layer may further include an additive having a capability to absorb near infrared rays.

The additive may include 0.05 to 5 parts by weight based on 200 parts by weight of the pile yarn of the pile portion, the bubble layer, or the backing layer.

The additive is any one selected from the group consisting of propine (Porphine), colon (Corrole), phthalocyanine (Phthalocyanine), polymethine (1), polymethine (2) and polymethine (3) It may be a compound formed by covalently bonding a polymethine-based compound and a metal.

The metal may be any one selected from the group consisting of iron (Fe), manganese (Mn), ruthenium (Ru), chromium (Cr), vanadium (V), titanium (Ti), copper (Cu), and combinations thereof. have.

According to an embodiment of the present invention, the light reflectance may be increased by the white pile portion, the bubble layer, and the backing layer of the artificial grass for solar light generation. Accordingly, the light incident rate is increased to the lower surface of the solar cell module facing the artificial turf for photovoltaic generation, and thus the solar power generation efficiency may be increased.

According to an embodiment of the present invention, the artificial turf for photovoltaic generation is located under the solar cell module and installed on the ground. Therefore, the land management cost is reduced and the permeability is high compared to the use of the open land and concrete ground, and it has excellent performance in the dimensions such as soil loss or ground collapse due to drainage or rainfall.

According to an exemplary embodiment of the present invention, visibility around a double-sided light receiving type solar cell module may be increased by an artificial grass for photovoltaic generation including a pile part mixed with white and green on the ground on which the solar cell module is installed.

According to the embodiment of the present invention, the infrared absorbing additive absorbs infrared rays to reduce the heat reflected, thereby lowering the temperature rise of the photovoltaic module to prevent the loss of efficiency.

1 is a schematic view showing an artificial turf for solar cells according to an embodiment of the present invention.
2 is an enlarged view of a portion A of FIG. 1;
Figure 3 is a schematic diagram showing the artificial turf for solar cells according to another embodiment of the present invention.
4 is an enlarged view of a portion B of FIG. 2;
Figure 5 is a schematic diagram showing an artificial turf for solar cells according to another embodiment of the present invention.
6 is a table showing the light reflectance of the artificial turf for solar according to the wavelength.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. Like parts are designated by like reference numerals throughout the specification.

Then, the artificial turf for solar cells according to an embodiment of the present invention will be described with reference to FIGS. 1 and 2.

1 is a schematic view showing an artificial turf for solar cells according to an embodiment of the present invention, Figure 2 is an enlarged view of a portion A of FIG.

1 and 2, the artificial grass 200 for solar power generation according to the present embodiment includes a pile part 220, a bubble layer 210, and a backing layer 230, and a solar cell module 100. ) Is installed on the floor of the place where the solar cell module reflects light to increase solar power generation efficiency. The solar cell module may be a double-sided light receiving type.

The pile unit 220 forms a grass layer and is formed by tufting the bubble yarns to the bubble layer 210. Pile portion 220 is piled along the first direction (Y) of the bubble layer 210 is arranged in the second direction (X).

The pile yarn may include resins, flame retardants, waxes, antioxidants and titanium dioxide (TiO ₂ ). Furthermore, the pile yarn may include 92 to 98 parts by weight of resin, 0.5 to 1 part by weight of flame retardant, 0.1 to 1 part by weight of wax, 0.1 to 1 part by weight of antioxidant, and 0.1 to 1 part by weight of titanium dioxide (TiO 2).

The resin may be one or more selected from the group consisting of linear low density polyethylene (LLDPE), low density polyethylene (LDPE), medium density polyethylene (MDPE), high density polyethylene (HDPE), polyamide, and combinations thereof. The polyamide may be one or more selected from the group consisting of nylon 6, nylon 6/6, nylon 6/10, nylon 11, nylon 12 and combinations thereof.

Antioxidant is for preventing the oxidation of the polyolefin-based yarn for artificial turf, which is the final molded product, and the kind thereof is not particularly limited, and typically, a hindered phenyl type, tocopherol, vitamin C (ascorbic acid), and the like. Specific examples of sterically hindered phenyl type antioxidants include 2,6-di-t-butyl-p-cresol; 4,4'-bis (2,6-di-t-butylphenol); Tetrakis p [methylene (3,5-di-t-butyl) 4-hydroxy-hydrocinnamate)] methane; 1,3,5-tris (4-tert-butyl-3-hydroxy-2,6-dimethylbenzyl) -1,3,5-triazine-2,4,6- (1H, 3H, 5H)- Trion; 1,3,5-tris (3,5-di-tert-butyl-4-hydroxybenzyl) -s-triazine-2,4,6- (1H, 3H, 5H) -trione; Tris (2,4-ditert-butylphenyl) phosphite; Bis (2,4-dit-butylphenyl) pentaerythritol diphosphite; 2 [[2,4,8,10-tetrakis (1,1-dimethylethyl) dibenzo [d, f] [1,3,2] dioxaphosphine-6-yl] oxy] -N, N -Bis [2 [[2,4,8,10-tetrakis (1,1-dimethylethyl) dibenzo [d, f] [1,3,2] dioxaphosphine-6-yl] oxy] ethane Amines; Oxidized bis (tallow alkyl) amines; 4,4'-bis (2,6-diisopropylphenyl); 2,4,6-tri-t-butylphenol; 2,2'-thiobis (4-methyl-6-t-butylphenol); Octadecyl 2 (3'5'-di-t-butyl-4'-hydroxyphenyl) -propionate and the like; Esters of thiodipropionic acid such as dilauryl thiodipropionate and distearyl thiodipropionate and the like; Hydrocarbon phosphites such as triphenyl phosphite, trinonyl phosphite, diisodecyl pentaerythritol diphosphate, diphenyldecyl phosphite and the like; And mixtures thereof. The content of the antioxidant is not particularly limited, for example, about 0.1 to 3.0 parts by weight based on 100 parts by weight of the polyolefin resin.

Titanium dioxide is a non-tartar-based pigment that is tasteless and odorless white powder. It has great oxidizing and antibacterial effects, and removes odor and sterilizes it. The pile yarn may be formed white by titanium dioxide, and the white pile yarn may be increased in light reflection efficiency by titanium dioxide. The effect of titanium dioxide is well known and detailed description thereof will be omitted.

The pile yarn may also include resins, waxes, antioxidants and titanium dioxide (Tio ₂ ), yellow pigments and green pigments. Furthermore, pile yarns 92 to 98 parts by weight of resin, 0.5 to 1 parts by weight of flame retardant, 0.1 to 1 parts by weight of wax, 0.1 to 1 parts by weight of antioxidant, 0.1 to 1 parts by weight of titanium dioxide, 0.5 to 2 parts by weight of yellow pigment and green It may comprise 0.1 to 1 parts by weight of the pigment. The pile yarn may be formed into green similar to natural grass by yellow pigments and green pigments.

Accordingly, the pile yarn 220 includes a white first yarn 221 and a green second yarn 222. The first yarn and the second yarn are mixed and tufted together to the bubble layer 210. The first yarn 221 and the second yarn 222 are mixed in each pile part 220. Accordingly, the white region and the green region are mixed, and the light reflectance of the pile unit 220 may be increased by the white region.

Meanwhile, as illustrated in FIGS. 3 and 4, the first yarn 221 and the second yarn 222 may be divided and tufted adjacent to the bubble layer 210, respectively. In this case, the first column W may be formed of a first yarn and the second column G may be formed of a second yarn among the pile parts 220 arranged in the second direction X of the bubble layer 210. The pile part of the 1st company and the pile part of the 2nd company are adjacently arrange | positioned alternately.

As shown in FIG. 5, the bubble layer 210 is divided into a plurality of regions, and the first yarn and the second yarn are tufted, respectively, so that the pile part 220 is formed of the first region W and the green region. It consists of two regions (G).

For example, the first yarn is tufted in the first region W to form a white pile 220, and the second yarn is tufted in the second region G to form a green pile 220. The first region W and the second region G are alternately formed adjacent to each other along the first direction Y and the second direction X of the bubble layer 210.

The arrangement of the first and second yarns may vary depending on the design of the artificial turf for solar power generation. Therefore, this embodiment does not particularly limit the arrangement structure of the first yarn and the second yarn.

Furthermore, the pile portion may further include an infrared absorbing additive. The infrared absorption additive is any one selected from the group consisting of propine, colon, phthalocyanine, polymethine 1, polymethine 2 and polymethine 3. It may be a compound formed by covalently bonding a polymethine-based compound and a metal.

The metal may be at least one selected from the group consisting of iron (Fe), manganese (Mn), ruthenium (Ru), chromium (Cr), vanadium (V), titanium (Ti), copper (Cu), and combinations thereof. . Furthermore the metal may be iron, copper or titanium. The additive is preferably a compound formed by combining phthalocyanine and copper and has a structure of [Formula 1].

Such an infrared absorbing additive may include 0.05 to 5 parts by weight based on 200 parts by weight of the pile part.

This infrared absorption additive reduces the heat reflected by the pile portion absorbs infrared rays. Thus, the temperature rise of the photovoltaic module has an effect of preventing the loss of efficiency.

The bubble layer 210 may include a yarn made of polyethylene terephthalate (PET) as a main component and titanium dioxide (Tio2). The yarn constituting the bubble layer is formed of a plain weave made of white by titanium dioxide. The white bubble layer assists in increasing the light reflection efficiency of the pile yarn.

The fineness of the bubble layer yarn may be between 1000 and 1500 Denier. If the fineness of the yarn is less than 1000 Denier, the tensile strength may be easily damaged, and if it exceeds 1500 Denier, the weight increase and the manufacturing cost increase. The warp density of the bubble layer may be 23 to 25 / inch, and the weft density may be 21 to 24 / inch.

Since the titanium dioxide of the bubble layer is the same as the titanium dioxide of the pile company, duplicate description will be omitted below.

The backing layer 230 is connected to the bottom surface of the bubble layer 210 to prevent the pile unit 220 from leaving the bubble layer 210.

The backing layer 230 is made of styrene butadiene rubber (SBR), ethylene-vinyl acetate copolymer (EVA), polyurethane (PU), acrylic (acrylic), polypropylene ( polypropylene; PP), polyethylene (PE) and one or more resins selected from the group consisting of a combination thereof, calcium carbonate, water, additives and titanium dioxide. The backing layer may be formed in white to assist in increasing the reflection efficiency of the pile yarn.

Furthermore, the backing layer may include 15 to 25 parts by weight of resin, 49 to 53.5 parts by weight of calcium carbonate, 20 to 30 parts by weight of water, 0.5 to 2 parts by weight of additives, and 0.5 to 3 parts by weight of titanium dioxide.

The backing layer may be formed wet or dry.

For the SBR component in the resin of the wet backing layer, 21 to 23 parts by weight of Styrene-Butadiene Latex, 50 to 52 parts by weight of calcium carbonate (CaCO3), 25 to 27 parts by weight of water, thickeners and other additives 0 to 2 It includes parts by weight. Other additives include titanium dioxide.

In the case of Acryl Foam, 30 to 40 parts by weight of Copolymer of acrylate, 35 to 45 parts by weight of CaCO3, 20 to 30 parts by weight of water, 0 to 5 parts by weight of thickener and other additives, and other additives include titanium dioxide.

In the case of PU (polyurethane), 0 to 28 parts by weight of polyurethane, 2 to 5 parts by weight of dimethyl carbonate, 65 to 70 parts by weight of water, 0 to 2 parts by weight of thickener and other additives, and other additives include titanium dioxide.

In the case of the dry backing layer, a film having a predetermined thickness and a bubble layer may be combined to each other, and include titanium dioxide and an antioxidant.

Meanwhile, the backing layer 230 may include g-phosphate (N- (phosphonomethyl) glycine), glyfosinate, oxadiazon, asulam (asulam, methyl sulfanilycarbamate), which inhibit weed growth. It may further include any one selected from the group consisting of a combination. Since weeds do not grow around the artificial turf 200 for solar power generation by the backing layer 230 including the weed removal component, it is easy to follow-up management of the ground on which the solar cell module is installed.

The backing layer may be formed to a thickness of 100㎛ to 5mm. Here, in the case of the wet coating, the thickness of the backing layer may be 100 μm to 2 mm, and in the case of the dry coating, the thickness of the backing layer may be 100 μm to 5 mm.

If the thickness of the backing layer is less than 100㎛ does not fix the pile yarn to the bubble layer 210, if it exceeds 5mm may increase the weight.

Meanwhile, the bubble layer and the backing layer may further include an infrared absorbing additive. The artificial turf for solar light absorbs infrared rays to reduce the heat reflected and thereby lowers the temperature rise of the photovoltaic module to prevent efficiency loss.

Light reflectances of the white pile yarn, bubble layer, and backing layer are as follows.

Experimental Example 1 Measurement of Light Reflectance According to White Yarn

Example 1

A white pile yarn sample was prepared by mixing 96.5 parts by weight of a resin composed of linear low density polyethylene and high density polyethylene, 0.5 parts by weight of a flame retardant, 0.5 parts by weight of a wax, 0.5 parts by weight of an antioxidant, and 2 parts by weight of titanium dioxide.

Example 2

Using the same method as in Example 1, a white pile yarn sample was prepared by mixing 95.5 parts by weight of a resin consisting of linear low density polyethylene and high density polyethylene, and 3 parts by weight of titanium dioxide.

Example 3

Using the same method as in Example 1, 93.5 parts by weight of a resin consisting of a linear low density polyethylene and high density polyethylene, 5 parts by weight of titanium dioxide was mixed to prepare a white pile yarn sample.

Comparative Example 1

Using the same method as in Example 1, a white pile yarn sample was prepared by mixing 98 parts by weight of a resin composed of linear low density polyethylene and high density polyethylene and 0.5 parts by weight of titanium dioxide.

Comparative Example 2

Using the same method as in Example 1, a white pile yarn sample was prepared by mixing 88.5 parts by weight of a resin consisting of linear low density polyethylene and high density polyethylene, and 10 parts by weight of titanium dioxide.

Comparative Example 3

In the same manner as in Example 1, except for titanium dioxide, 98.5 parts by weight of a resin composed of linear low density polyethylene and high density polyethylene was mixed to prepare a white pile yarn sample.

Light reflectance for each wavelength was evaluated for the pile yarn samples obtained in Examples 1 to 3 and Comparative Examples 1 to 3, and the results thereof are shown in the following [Table 1]. Light reflectance was measured using a UV-Vis-IR Spectrometer.

Suzy Flame retardant Wax Antioxidant Titanium dioxide Light reflectance (% R) Example 1 96.5 0.5 0.5 0.5 2 82 Example 2 95.5 0.5 0.5 0.5 3 85 Example 3 93.5 0.5 0.5 0.5 5 87 Comparative Example 1 98 0.5 0.5 0.5 0.5 46 Comparative Example 2 88.5 0.5 0.5 0.5 10 89 Comparative Example 3 98.5 0.5 0.5 0.5 0 17

92 to 99 parts by weight of a resin consisting of linear low density polyethylene and high density polyethylene, 0.5 parts by weight of flame retardant, 0.5 parts by weight of wax, 0.5 parts by weight of antioxidants 2 to 5 parts by weight of titanium dioxide as in Examples 1 to 3 When included, the light reflectance was measured at 82-87% R. However, as in Comparative Example 1, the light reflectance was 46% R when 98 parts by weight of the resin composed of linear low density polyethylene and high density polyethylene, 0.5 parts by weight of flame retardant, 0.5 parts by weight of wax, 0.5 parts by weight of antioxidant, and 0.5 parts by weight of titanium dioxide were included. As lower than Examples 1-3. As in Comparative Example 2, when 88.5 parts by weight of a resin composed of linear low density polyethylene and high density polyethylene and 10 parts by weight of titanium dioxide were included, the light reflectance was higher than Examples 1 to 3 with 89% R, but the linear low density polyethylene and high density polyethylene were used. Due to the reduction of the resin, the physical properties of the pile yarn were lowered and the manufacturing cost was increased, and when the titanium dioxide was not included as in Comparative Example 3, the light reflectance was measured at 17% R, which was significantly lower than those in Examples 1 to 3.

Experimental Example 2 Measurement of Light Reflectance According to White Bubble Layer]

Example 4

A white bubble layer sample was prepared by mixing 98 parts by weight of polyethylene terephthalate and 2 parts by weight of titanium dioxide.

Example 5

Using the same method as Example 4, 97 parts by weight of polyethylene terephthalate and 3 parts by weight of titanium dioxide were mixed to prepare a white foam layer sample.

[Comparative Example 4]

Using the same method as in Example 4, 99.5 parts by weight polyethylene terephthalate, 0.5 parts by weight of titanium dioxide was mixed to prepare a white foam layer sample.

[Comparative Example 5]

A white foam layer sample was prepared in the same manner as in Example 4, but including 90 parts by weight of polyethylene terephthalate and 10 parts by weight of titanium dioxide.

Comparative Example 6

A bubble layer sample was prepared in the same manner as in Example 4, but including 100 parts by weight of polyethylene terephthalate and no titanium dioxide.

Light reflectance for each wavelength was evaluated for the bubble layer samples obtained in Examples 4 and 5 and Comparative Examples 4 to 6, and the results thereof are shown in the following [Table 2]. Light reflectance was measured using a UV-Vis-IR Spectrometer.

Polyethylene terephthalate Titanium dioxide Light reflectance (% R) Example 4 98 2 48 Example 5 97 3 51 Comparative Example 4 99.5 0.5 28 Comparative Example 5 90 10 53 Comparative Example 6 100 0 15

In the case of the bubble layer including 97 to 98 parts by weight of polyethylene terephthalate and 2 to 3 parts by weight of titanium dioxide, the light reflectance was measured to be 48 to 51% R as in Examples 4 and 5.

However, in the case of the bubble layer including 99.5 parts by weight of polyethylene terephthalate and 0.5 parts by weight of titanium dioxide as in Comparative Example 4, the light reflectance was measured to be 28% R lower than those of Examples 4 and 5. In the case of the bubble layer including 90 parts by weight of polyethylene terephthalate and 10 parts by weight of titanium dioxide as in Comparative Example 5, the light reflectance was measured to be 53% R higher than that of Examples 4 and 5, but the backing layer was reduced due to the reduction of polyethylene terephthalate. The physical properties of were lowered. When the titanium dioxide was not included as in Comparative Example 6, the light reflectance was measured to be 15% R, which is significantly lower than those of Examples 4 and 5.

Experimental Example 3 Measurement of Light Reflectance According to White Backing Layer

Example 6

A white backing layer sample was prepared by mixing 20 parts by weight of a styrene butadiene rubber resin, 52 parts by weight of calcium carbonate, 25 parts by weight of water, and 2 parts by weight of titanium dioxide.

Example 7

Using the same method as in Example 6, 49 parts by weight of calcium carbonate and 5 parts by weight of titanium dioxide were mixed to prepare a white backing layer sample.

Comparative Example 7

Using the same method as in Example 6, 53.5 parts by weight of calcium carbonate and 0.5 parts by weight of titanium dioxide were mixed to prepare a white backing layer sample.

Comparative Example 8

Using the same method as in Example 6, 44 parts by weight of calcium carbonate and 10 parts by weight of titanium dioxide were mixed to prepare a white backing layer sample.

Comparative Example 9

Using the same method as Example 6, but containing titanium dioxide, 54 parts by weight of calcium carbonate was mixed to prepare a white backing layer sample.

Examples 6 and 7 For the backing layer samples obtained in Comparative Examples 7 to 9, the light reflectance for each wavelength was evaluated, and the results are shown in the following [Table 3]. Light reflectance was measured using a UV-Vis-IR Spectrometer.

Styrene Buta Daien Rubber Calcium carbonate water Titanium dioxide Light reflectance (% R) Example 6 20 52 25 2 55 Example 7 20 49 25 5 57 Comparative Example 7 20 53.5 25 0.5 27 Comparative Example 8 20 44 25 10 58 Comparative Example 9 20 54 25 0 14

In the case of the backing layer containing 20 parts by weight of styrene butadiene rubber resin, 50 to 53 parts by weight of calcium carbonate, 25 parts by weight of water, 1 part by weight of additives, and 2 to 5 parts by weight of titanium dioxide, the light reflectance is as in Examples 6 and 7. It was measured 55-57% R.

However, when including 54.5 parts by weight of calcium carbonate and 0.5 parts by weight of titanium dioxide as in Comparative Example 7, the light reflectance was significantly lower than those in Examples 6 and 7, 45 parts by weight of calcium carbonate and 10 parts by weight of titanium dioxide as in Comparative Example 8 When included, the light reflectance was measured to be higher than that of Examples 6 and 7, but the physical properties of the backing layer were lowered due to the reduction of calcium carbonate. And when the titanium dioxide is not included as in Comparative Example 9, the light reflectance was measured at 14% R, which is significantly lower than the light reflectance of Examples 6 and 7.

Experimental Example 4 Measurement of Artificial Grass Light Reflectance including White Backing Layer, White Bubble Layer, and White and Green Piles

Example 8

An artificial turf sample was prepared in which a white first yarn and a green second yarn were tufted in a 50:50 ratio to a white bubble layer, and a white backing layer was bonded to the bubble layer.

Example 9

An artificial turf sample was prepared in the same manner as in Example 8 except that only white first yarns were tufted to the white bubble layer and a white backing layer was bonded to the bubble layer.

Example 10

An artificial turf sample was prepared in the same manner as in Example 8 except that only the second green yarn was tufted to the white bubble layer and the white backing layer was bonded to the bubble layer.

Comparative Example 10

An artificial turf sample was prepared in which only the second green yarn was tufted to the general bubble layer and the general backing layer was bonded to the bubble layer. Here, the bubble layer and the backing layer were formed in black.

Examples 8 and 9 For the artificial turf samples obtained in Comparative Examples 10 and 11, the light reflectance for each wavelength was evaluated, and the results are shown in the following [Table 4]. Light reflectance was measured using a UV-Vis-IR Spectrometer.

Pile Bubble layer Backing floor Light reflectance Example 8 White + green White White 55% R Example 9 White White White 80% R Comparative Example 10 green White White 15% R Comparative Example 11 green Black color Black color 13% R

In the case of the artificial grass in which the bubble layer and the backing layer were formed in white, and the pile part was formed in white and green, the reflectance of light was measured at an average of 55% R according to the wavelength (350-800 nm) as in Example 8, In the case of the artificial turf in which both the backing and the pile part were formed in white, the light reflectance was measured by an average of 80% R according to the wavelength as in Example 9. In particular, in Example 8, the reflectance in the 350 to 800 nm region was greatly increased, and in Example 9, the reflectance in the 350 nm region was significantly increased (see FIG. 6).

In the case of the artificial turf in which the bubble layer and the backing layer were formed in white and the pile part was formed in green, the light reflectance was measured by an average of 15% R according to the wavelength as in Comparative Example 10, and the bubble layer and the backing layer were formed in black and the pile was In the case of artificial turf in which the part was formed in green, the light reflectance was measured on the average of 13% R according to the wavelength as in Comparative Example 11.

Accordingly, the light reflectances of Examples 8 and 9 in which the pile part includes white were measured to be higher than those of Comparative Examples 10 and 11 in which the pile part was only green.

The infrared absorption efficiency of the pile portion including the infrared absorption additive is as follows.

Experimental Example 5 Measurement of Infrared Absorption of a Pile Part

Example 10

A pile yarn sample was prepared by mixing 0.1 parts by weight of an infrared absorbing additive with respect to 200 parts by weight of a resin composed of a linear low density polyethylene and a high density polyethylene forming a pile yarn. An infrared absorption additive is a compound formed by combining phthalocyanine and copper.

Example 11

Using the same method as Example 10, a pile yarn sample was prepared by mixing 0.25 parts by weight of an infrared absorbing additive with respect to 200 parts by weight of a resin composed of a linear low density polyethylene and a high density polyethylene forming a pile yarn.

Example 12

Using the same method as in Example 10, a pile yarn sample was prepared by mixing 0.5 parts by weight of an infrared absorbing additive with respect to 200 parts by weight of a resin composed of a linear low density polyethylene and a high density polyethylene forming a pile yarn.

Example 13

Using the same method as in Example 10, a pile yarn sample was prepared by mixing 1 part by weight of an infrared absorbing additive with respect to 200 parts by weight of a resin composed of a linear low density polyethylene and a high density polyethylene forming a pile yarn.

Example 14

Using the same method as in Example 10, a pile yarn sample was prepared by mixing 5 parts by weight of an infrared absorbing additive with respect to 200 parts by weight of a resin consisting of a linear low density polyethylene and a high density polyethylene forming a pile yarn.

Comparative Example 12

Using the same method as in Example 10, a pile yarn sample was prepared by mixing 0.025 parts by weight of an infrared absorbing additive with respect to 200 parts by weight of a resin consisting of a linear low density polyethylene and a high density polyethylene forming a pile yarn.

Comparative Example 13

Using the same method as in Example 10, a pile yarn sample was prepared by mixing 10 parts by weight of an infrared absorbing additive with respect to 200 parts by weight of a resin composed of a linear low density polyethylene and a high density polyethylene forming a pile yarn.

Comparative Example 14

Using the same method as in Example 10, a pile yarn sample was prepared by mixing 25 parts by weight of an infrared absorbing additive with respect to 200 parts by weight of a resin composed of a linear low density polyethylene and a high density polyethylene forming a pile yarn.

About the pile yarn samples obtained in Examples 10-14 and Comparative Examples 12-14, absorption performance was evaluated by near-infrared absorption spectrum, and the result is shown in the following [Table 5].

File company additive Absorbance (%) Formability Example 10 200 0.1 94% ○ Example 11 200 0.5 99% ○ Example 12 200 One 99.5% ○ Example 13 200 2 99.7% ○ Example 14 200 10 99.9% ○ Comparative Example 12 200 0.05 72% ○ Comparative Example 13 200 20 99.9% △ Comparative Example 14 200 50 99.9% X

When the infrared absorbing additive contained 0.05 to 5 parts by weight with respect to 200 parts by weight of the resin composed of linear low density polyethylene and high density polyethylene forming the pile yarn, the infrared absorbance was measured to be 94 to 99.9% and formability was also excellent.

However, when the infrared absorbing additive contained 0.025 parts by weight based on 200 parts by weight of the resin composed of linear low density polyethylene and high density polyethylene forming pile yarns as in Comparative Example 12, 72% of the infrared absorbance was measured, which was lower than that of Examples 10 to 14. However, the formability of the pile yarn was excellent. When the infrared absorbing additive contained 20 to 50 parts by weight with respect to 200 parts by weight of the resin consisting of linear low density polyethylene and high density polyethylene forming the pile yarn as in Comparative Example 13 and Comparative Example 14, the infrared absorbance was excellent as 99.9%, but the physical properties of the pile yarn This fell and the moldability fell.

The artificial turf for solar power generation including the white and green pile part 220, the white bubble layer 210, and the white backing layer 230 according to the present embodiment is under the solar cell module 100. In order to measure the reflectance of the light incident on the artificial turf 200 for photovoltaic generation, the reflectance of the solar cell module was measured. On the contrary, when the pile part was formed in green and the bubble layer and the backing layer were formed in black, the reflectance reflected by the solar cell module was measured, and the average was 13% R. Accordingly, it can be seen that the artificial grass 200 for photovoltaic generation having a pile portion 220, a white bubble layer 210, and a white backing layer 230 made of green and white has high light reflection efficiency. And it can be seen that the infrared absorption additive to absorb the infrared rays to reduce the reflected heat, thereby reducing the temperature rise of the photovoltaic module to prevent the loss of efficiency.

Accordingly, light is incident on the upper surface of the solar cell module, and light that exits the upper surface of the solar cell module is incident on the artificial turf 200 for photovoltaic generation, and white and green pile parts 220 and white bubble layers 210 and the white backing layer 230 reflect the incident light to the bottom surface of the solar cell module. Since light is incident on both the upper and lower surfaces of the solar cell module, power generation efficiency may be increased.

Since the artificial turf for solar power generation 200 is disposed on the ground on which the solar cell module 100 is installed, the cost of the ground management is reduced compared to the use of open land and concrete ground, and the water permeability due to drainage or rainfall due to high permeability Loss or ground collapse can be prevented.

In addition, the visible light reflection efficiency of the general artificial turf is about 10% R level, whereas the artificial turf for solar photovoltaic generation 200 is a white and green pile 220, a white bubble layer 210 and a white backing layer By 230, the light reflectance has a high efficiency of about 55% R level depending on the wavelength. Due to the high light reflectance, the light incident to the rear of the solar module increases, and thus, the pile part has an improved effect than the artificial turf made of green only under the solar module.

Although the preferred embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements of those skilled in the art using the basic concepts of the present invention defined in the following claims are also provided. It belongs to the scope of rights.

100: double-sided light receiving solar cell module 200: artificial grass for solar power generation
210: bubble layer 220: pile part
230: backing layer

Claims (6)

It is installed on the floor of the place where the solar cell module is installed to reflect the incident sunlight to the solar cell module,
Bubble Layer,
A plurality of pile parts in which pile yarns containing additives having near infrared absorption performance are tufted into the bubble layer;
A backing layer disposed on the bubble layer and preventing separation of the pile portion.
Including,
The pile yarn includes a first white yarn and a second green yarn of different colors, and the colors of the first yarn and the second yarn have different light reflectances,
The bubble layer is partitioned into a plurality of regions and the first yarn is tufted into the first region W to form a white pile, and the second yarn is tufted into the second region G to form a green pile. The pile part includes the first region W, which is a white region, and the second region, which is a green region, and the first region W and the second region G correspond to a first direction Y of the bubble layer. Alternately formed adjacent to each other along the second direction X, and the pile part of the white region reflects the incident sunlight to the solar cell module.
Artificial grass for solar power generation. In claim 1,
The pile yarn, Linear Low Density Polyethylene (LLDPE), Low Density Polyethylene (LDPE), Medium Density Polyethylene (MDPE), High Density Polyethylene (HDPE), Polyamide ( polyamide) and 92 to 98 parts by weight of one or more resins selected from the group consisting of
0.5 to 1 part by weight of flame retardant,
0.1 to 1 parts by weight of wax,
0.1 to 1 parts by weight of antioxidant and
0.1 to 3 parts by weight of titanium dioxide
Containing
Artificial grass for solar power generation. In claim 1,
The bubble layer,
Yarn made of polyethylene terephthalate and titanium dioxide, the fineness of the yarn is 1000 to 1500 denier, the warp density is 23 to 25 / inch and the weft density is 21 to 24 / inch
Artificial grass for solar power generation. In claim 3,
The bubble layer,
97 to 99.5 parts by weight of the polyethylene terephthalate and
0.5 to 3 parts by weight of the titanium dioxide
Containing
Artificial grass for solar power generation. In claim 1,
The backing layer,
15 to 25 parts by weight of one or more resins selected from the group consisting of styrene butadiene rubber, ethylene vinyl acetate copolymer, polyurethane, acrylic, polypropylene, polyethylene, and combinations thereof,
49 to 53.5 parts by weight of calcium carbonate,
20 to 30 parts by weight of water,
0.5 to 2 parts by weight of an additive and
0.5 to 5 parts by weight of titanium dioxide
Containing
Artificial grass for solar power generation. In claim 1,
The additive includes 0.05 to 5 parts by weight based on 200 parts by weight of the pile yarn,
The additive is any one selected from the group consisting of propine (Porphine), colon (Corrole), phthalocyanine (Phthalocyanine), polymethine (1), polymethine (2) and polymethine (3) Is a compound formed by covalently bonding a polymethine-based compound and a metal
Artificial grass for solar power generation.

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