Snow melting tool, method for melting snow by the same, dual-side solar power generation panel, method for melting snow by the same, solar power generator, and method for melting snow by the same

Abstract

To provide a snow melting tool which can provide a snow removal function easily and inexpensively to an existing dual-side solar power generation panel as well and can efficiently melt snow, a method for melting snow by the snow melting tool, a solar power generation panel, a method for melting snow by using the solar power generation panel, a solar power generation device, and a method for melting snow by using the solar power generation device.SOLUTION: A covering unit 110 shields and covers at least a part of light which is received by a power generation cell 210 arranged in the back surface of a dual-side solar power generation panel 200 as a side on which snow does not pile up of the dual-side solar power generation panel 200.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a snow melting device, a snow melting method using the snow melting device, a photovoltaic panel, a snow melting method using the photovoltaic panel, a photovoltaic device, and a snow melting method using the photovoltaic device, and particularly to a snow melting device for melting snow accumulated on a photovoltaic panel, a snow melting method using the snow melting device, a photovoltaic panel, a snow melting method using the photovoltaic panel, a photovoltaic device, and a snow melting method using the photovoltaic device.

Background Art

[0002] Conventionally, photovoltaic power generation has been developed in which sunlight irradiated from the sun is received by a photovoltaic panel in which solar cells are arranged, and the light energy is converted into electricity. In addition, not only receiving light irradiated from the sun to generate electricity, but also receiving light reflected from the ground on the back side of the photovoltaic panel to generate electricity, a photovoltaic panel with increased power generation has been developed.

[0003] However, these photovoltaic panels mainly have a problem that when snow accumulates on the surface of the photovoltaic panel in a heavy snow area, the sunlight is blocked by the snow, resulting in a decrease in power generation. For this reason, a photovoltaic panel capable of efficiently removing snow on the photovoltaic panel has been developed (see, for example, Patent Documents 1 and 2).

[0004] FIG. 5 is a diagram showing an example of a heat exchange system including a solar cell and a heat exchanger for a solar cell disclosed in Patent Document 1. As shown in FIG. 5, in the heat exchange system 10 disclosed in Patent Document 1, a photovoltaic panel 11 and a heat exchanger for a solar cell 12 that covers the solar cell 11a in the photovoltaic panel 11 from the front side are provided.

[0005] The heat exchanger 12 for a solar cell is formed in a hollow plate-shaped rectangular box body having a fluid flow passage 12c through which fluid flows between a fluid inlet 12a into which fluid is injected and a fluid outlet 12b from which the fluid injected from the fluid inlet 12a is discharged. The heat exchanger 12 for a solar cell is configured to transmit sunlight through the fluid flow passage 12c.

[0006] At this time, the transparent or translucent fluid is injected from the fluid inlet 12a, passes through the fluid flow passage 12c, and is discharged from the fluid outlet 12b. By using a fluid at a temperature higher than the temperature of the accumulated snow, the snow accumulated on the surface side of the solar power generation panel 11 can be melted and removed.

[0007] FIG. 6 is a diagram showing an example of a solar power generation panel capable of continuing power generation even during snow accumulation disclosed in Patent Document 2. As shown in FIG. 6, the solar power generation panel 20 disclosed in Patent Document 2 is a laminate in which a plurality of members are laminated. A heating module 23 is laminated via an adhesive layer 22 on the upper layer of the heat insulating material layer 21, a photovoltaic module 25 is laminated via an adhesive layer 24 on the upper layer of the heating module 23, a translucent support member 27 is laminated via an adhesive layer 26 on the upper layer of the photovoltaic module 25, and a surface protection layer 28 is laminated on the upper layer of the translucent support member 27.

[0008] Thus, the solar power generation panel 20 disclosed in Patent Document 2 includes a photovoltaic module 25 that converts light irradiated from the sun into electric power, and a heating module 23 that converts the electric energy converted by the photovoltaic module 25 into heat energy. The heating module 23 is disposed on the side opposite to the side on which the light irradiated from the sun is irradiated to the photovoltaic module 25.

[0009] Thereby, the solar power generation panel 20 can be heated by the heating module 23 so that the surface temperature of the solar power generation panel 20 does not drop below the freezing point, and the snow adhering to the surface of the solar power generation panel 20 can be melted. For this reason, power generation can be continued even during snow accumulation in winter.

Prior Art Documents

Patent Document

[0010]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0011] However, when attempting to impart the snow removal function disclosed in Patent Document 1 or Patent Document 2 onto an existing solar power generation panel, there is a problem in that the introduction cost becomes high and the introduction is not easy.

[0012] Specifically, the heat exchange system 10 disclosed in Patent Document 1 is one in which a heat exchanger for solar cells 12 is installed in the upper layer of the solar power generation panel 11. Therefore, by installing the heat exchanger for solar cells 12 in the upper layer of an existing solar power generation panel, it is possible to impart a snow removal function even to an existing solar power generation panel.

[0013] However, when attempting to install the heat exchanger for solar cells 12 onto an existing solar power generation panel, the supports and the like that were supporting the existing solar power generation panel must also support not only the solar power generation panel but also the heat exchanger for solar cells 12.

[0014] Therefore, in order to install the heat exchange system 10 onto an existing solar power generation panel, the supports and the like that support the solar power generation panel must be reinforced to the extent that they can withstand the load with the addition of the heat exchanger for solar cells 12, or replaced with sturdy supports that can withstand the load with the addition of the heat exchanger for solar cells 12. For this reason, separate costs for reinforcement and replacement of supports and the like are required for the introduction of the heat exchange system 10.

[0015] When using the heat exchange system 10, a fluid will pass through the inside of the heat exchanger 12 for solar cells. Therefore, the inside of the heat exchanger 12 for solar cells will be filled with the fluid, and the weight of the heat exchanger 12 for solar cells containing the fluid will become even heavier. Thus, the support columns that support the existing solar power generation panels 11 need to be of even higher strength, and the cost thereof will also increase.

[0016] Furthermore, in the heat exchange system 10, a tank for storing the fluid, a heat exchanger for heating the fluid, a pump for circulating the fluid, etc. are also required. Not only are the installation costs for these necessary, but space for installing them is also needed. For this reason, it is not easy to introduce the heat exchange system 10 disclosed in Patent Document 1 into existing solar power generation panels because of the high cost.

[0017] In addition, in the solar power generation panel 20 disclosed in Patent Document 2, since the heating module 23 is arranged on the side opposite to the side where the photovoltaic module 25 is irradiated with light from the sun, when attempting to introduce it into an existing solar power generation panel, it is necessary to remove the solar cells included in the existing solar power generation panel and install the heating module 23 below it. For this reason, the working time becomes longer and the introduction cost increases.

[0018] Furthermore, when removing the solar cells included in the existing solar power generation panel, if the solar cells are damaged, there is also a risk that the existing solar power generation panel must be replaced.

[0019] Although it is also conceivable to replace the existing solar power generation panel with the solar power generation panel 20 disclosed in Patent Document 2, the cost required to discard the existing solar power generation panel is also incurred. Also, it is not good for the environment to discard all of the existing solar power generation panels that are still usable in order to provide a snow removal function.

[0020] The present invention has been made in view of such points, and it is possible to easily and inexpensively provide a snow removal function to an existing double-sided solar power generation panel, and a snow melting tool capable of efficiently melting snow, a snow melting method using the snow melting tool, a photovoltaic panel, a snow melting method using the photovoltaic panel, a photovoltaic device, and an object of the present invention is to provide a snow melting method using the photovoltaic device.

Means for Solving the Problems

[0021] In the present invention, in order to solve the above problems, in a snow melting tool for melting snow accumulated on a double-sided photovoltaic panel, at least a part of the light received by a power generation cell arranged on the back surface, which is the side where snow does not accumulate on the double-sided photovoltaic panel, is blocked and covered. There is provided a snow melting tool characterized by comprising a covering portion. Thereby, at least a part of the light received by the power generation cell arranged on the back surface, which is the side where snow does not accumulate on the double-sided photovoltaic panel, is blocked and covered by the covering portion.

[0022] Further, in the present invention, in a snow melting method using a snow melting tool including a covering portion that blocks and covers at least a part of the light received by a power generation cell arranged on the back surface, which is the side where snow does not accumulate on the double-sided photovoltaic panel, a step of generating power on the back surface of the double-sided photovoltaic panel, and a step of generating heat in a portion covered by the covering portion by generating power on the back surface of the double-sided photovoltaic panel. There is provided a snow melting method characterized by comprising: Thereby, power is generated on the back surface of the double-sided photovoltaic panel, and heat is generated in the portion covered by the covering portion by generating power on the back surface of the double-sided photovoltaic panel.

[0023] Further, in the present invention, there is provided a double-sided photovoltaic panel for melting accumulated snow, characterized by comprising a covering portion that blocks and covers at least a part of the light received by a power generation cell arranged on the back surface, which is the side where snow does not accumulate. Thereby, at least a part of the light received by the power generation cell arranged on the back surface, which is the side where snow does not accumulate, is blocked and covered by the covering portion.

[0024] Further, in the present invention, in a snow melting method using a double-sided photovoltaic panel including a covering portion that blocks and covers at least a part of the light received by a power generation cell arranged on the back surface, which is the side where snow does not accumulate, a step of generating power on the back surface of the double-sided photovoltaic panel, and a step of generating heat in a portion covered by the covering portion by generating power on the back surface of the double-sided photovoltaic panel are provided, and the snow melting method is characterized by this. As a result, power is generated on the back surface of the double-sided photovoltaic panel, and by generating power on the back surface of the double-sided photovoltaic panel, heat is generated in the portion covered by the covering portion.

[0025] Further, in the present invention, in a photovoltaic device for melting snow accumulated on a photovoltaic panel, among a photovoltaic panel connection structure in which a plurality of the photovoltaic panels are connected, at least one photovoltaic panel is a double-sided photovoltaic panel including a covering portion that blocks and covers at least a part of the light received by a power generation cell arranged on the back surface, which is the side where snow does not accumulate, and a photovoltaic device is provided, and the photovoltaic device is characterized by this. As a result, among a photovoltaic panel connection structure in which a plurality of photovoltaic panels are connected, at least one double-sided photovoltaic panel as a photovoltaic panel blocks and covers at least a part of the light received by a power generation cell arranged on the back surface, which is the side where snow does not accumulate, with the covering portion.

[0026] Further, in the present invention, in a snow melting method using a photovoltaic device in which at least one photovoltaic panel among a photovoltaic panel connection structure in which a plurality of photovoltaic panels are connected is a double-sided photovoltaic panel including a covering portion that blocks and covers at least a part of the light received by a power generation cell arranged on the back surface, which is the side where snow does not accumulate, a step of generating power on the back surface of the double-sided photovoltaic panel, and a step of generating heat in a portion covered by the covering portion by generating power on the back surface of the double-sided photovoltaic panel are provided, and the snow melting method is characterized by this. As a result, power is generated on the back surface of the double-sided photovoltaic panel, and by generating power on the back surface of the double-sided photovoltaic panel, heat is generated in the portion covered by the covering portion.

Effects of the Invention

[0027] According to the snow melting device of the present invention, the snow melting method using the snow melting device, the photovoltaic panel, the snow melting method using the photovoltaic panel, the photovoltaic device, and the snow melting method using the photovoltaic device, since the covering part blocks and covers at least a part of the light received by the power generation cells arranged on the back surface, which is the side where snow does not accumulate on the double-sided photovoltaic panel, the following effects are achieved.

[0028] First, the back surface of the double-sided photovoltaic panel generates electricity by receiving the reflected light irradiated on the back surface of the double-sided photovoltaic panel. Next, the electricity generated on the back surface of the double-sided photovoltaic panel flows on the back surface of the double-sided photovoltaic panel. However, since the covering part blocks and covers at least a part of the light received by the power generation cells on the back surface of the double-sided photovoltaic panel, the covering part generates heat due to the hot spot phenomenon.

[0029] The heat generated by the hot spot phenomenon of the covering part is transmitted to the front surface of the double-sided photovoltaic panel, melting the snow accumulated on the front surface of the double-sided photovoltaic panel. Thereby, by simply providing a snow melting device having a covering part on the back surface of the existing double-sided photovoltaic panel, a snow removal function can be easily and inexpensively imparted, and snow melting can be performed efficiently.

Brief Description of the Drawings

[0030]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Mode for Carrying Out the Invention

[0031] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a plan view showing a snow melting device according to the present embodiment. As shown in FIG. 1, the snow melting device 100 is a snow melting device attached to the back side of a bifacial photovoltaic panel 200 (not shown here), and includes a covering portion 110 that blocks and covers at least a part of the light received by the power generation cells arranged on the back surface.

[0032] The bifacial photovoltaic panel 200 described here is one in which photovoltaic cells are provided not only on the front surface but also on the back surface, so that it receives not only direct sunlight but also light reflected from the ground, buildings, water surfaces, snow, etc., and directly converts the energy of the received light into electrical energy.

[0033] Generally, a bifacial photovoltaic panel has a glass surface that transmits light on both the front and back surfaces, and photovoltaic cells are arranged between the front glass surface and the back glass surface.

[0034] Note that, in the bifacial photovoltaic panel 200 described here, the front surface refers to the upper side of the bifacial photovoltaic panel 200 installed with an inclination, and the ground side of the bifacial photovoltaic panel 200 is referred to as the back surface.

[0035] The material of the covering portion 110 is formed of a material capable of blocking the light received by the power generation cells. Specifically, synthetic resins such as polyethylene, polypropylene, and ABS (Acrylonitrile Butadiene Styrene) resin can be mentioned, but other materials can also be selected as long as they can block the light received by the power generation cells. Also, it is preferable to adopt a black color for the color of the material of the covering portion 110 or the surface color of the covering portion 110 so that it can absorb light rays and block the light received by the power generation cells.

[0036] The snow melting device 100 will be described here by taking as an example the one in which the covering portion 110 is formed in a frame shape. However, it can be formed in any shape as long as it can block and cover at least a part of the light received by the power generation cells arranged on the back surface.

[0037] The snow melting device 100 is attached to the back surface of the bifacial photovoltaic panel 200 via an adhesive or the like. By attaching the snow melting device 100 to the back surface of the bifacial photovoltaic panel 200 during snowfall, the contact portion between the snow melting device 100 and the back surface of the bifacial photovoltaic panel 200 generates heat, and the heat is transmitted to the front surface of the bifacial photovoltaic panel 200, so that the snow accumulated on the front surface of the bifacial photovoltaic panel 200 melts.

[0038] FIG. 2 is a diagram showing the flow from the step of attaching a snow melting device to a photovoltaic device in which a plurality of bifacial photovoltaic panels are connected until the snow accumulated due to the heat generation of the bifacial photovoltaic panel melts. Here, it is assumed that the bifacial photovoltaic panel 200 receives sunlight and generates electricity, and the following description will be made on the assumption that the bifacial photovoltaic panel 200 can receive sunlight without being blocked.

[0039] FIG. 2(A) is a side view showing a state in which a snow melting device is attached to a photovoltaic device in which a plurality of bifacial photovoltaic panels 200 are connected. As shown in FIG. 2(A), a snow melting device 100 in which a covering portion 110 is formed in a shape along the peripheral surface of the bifacial photovoltaic panel 200 is attached to the back surface of the bifacial photovoltaic panel 200.

[0040] FIG. 2(B) is a side view showing a state in which snow has accumulated on the bifacial photovoltaic panel 200 to which the snow melting device 100 is attached to the back surface. The cross-hatched lines shown in the figure indicate the accumulated snow. As shown in FIG. 2(B), when sunlight irradiates the bifacial photovoltaic panel 200 in a snow-accumulated state, the front surface of the bifacial photovoltaic panel 200 has a power generation amount of 0% because sunlight is blocked by the snow, but the back surface receives reflected light, so the back surface of the bifacial photovoltaic panel 200 generates electricity with a power generation amount of 20% with respect to the front surface of the bifacial photovoltaic panel 200 in a non-snow-accumulated state. When the back surface of the double-sided photovoltaic panel 200 generates electricity, electricity flows from the positive side to the negative side on the back surface of the double-sided photovoltaic panel 200.

[0041] Figure 2(C) shows the snow melting device 100 attached to the front surface of the double-sided photovoltaic panel 200 and is a side view showing a state where the contact portion with the front surface of the double-sided photovoltaic panel 200 is heated. As shown in Figure 2(C), when the electricity generated by the front surface of the double-sided photovoltaic panel 200 due to reflected light flows on the back surface of the double-sided photovoltaic panel 200, the peripheral surface of the back surface of the double-sided photovoltaic panel 200 is covered by the covering portion 110, so it cannot generate electricity and it is difficult for electricity to flow.

[0042] Therefore, when the electricity generated on the back surface of the double-sided photovoltaic panel 200 that is not covered by the covering portion 110 flows, the resistance value of the portion covered by the covering portion 110 increases. As a result, the electricity that has become difficult to flow in the portion covered by the covering portion 110 on the back surface of the double-sided photovoltaic panel 200 causes a phenomenon in which the electrical energy is converted into heat energy, that is, a phenomenon called a hot spot occurs.

[0043] Figure 2(D) is a side view showing a state where the snow accumulated on the front surface starts to melt due to the heat generated by the hot spot phenomenon occurring on the front surface of the double-sided photovoltaic panel 200 being transmitted to the front surface.

[0044] As shown in Figure 2(D), when the heat generated by the hot spot phenomenon occurring on the front surface of the double-sided photovoltaic panel 200 is transmitted to the front surface, the snow accumulated on the front surface of the double-sided photovoltaic panel 200 melts from the peripheral surface on the front surface of the double-sided photovoltaic panel 200.

[0045] At this time, the double-sided photovoltaic panel 200 is installed with an inclination, and due to the weight of the snow melted from the peripheral surface on the front surface of the double-sided photovoltaic panel 200, the accumulated snow falls. As a result, the snow accumulated on the front surface of the double-sided photovoltaic panel 200 is eventually removed.

[0046] Figure 2(E) is a side view showing the state where snow melting is completed. As shown in Figure 2(E), due to the hot spot phenomenon on the surface of the bifacial photovoltaic panel 200 shown in Figure 2(E), the snow accumulated by the heat transmitted to the surface of the bifacial photovoltaic panel 200 has melted and been removed.

[0047] Thus, the snow accumulated on the bifacial photovoltaic panel 200 in the snow-covered state goes through the steps of power generation on the back surface of the bifacial photovoltaic panel 200, heat generation in the portion covered by the covering portion 110 of the bifacial photovoltaic panel 200, and melting of snow due to the heat generated on the back surface of the bifacial photovoltaic panel 200 being transmitted to the surface, and the snow accumulated on the bifacial photovoltaic panel 200 is completely removed.

[0048] In addition, since the snow melting device 100 only needs to be attached to the back side of the bifacial photovoltaic panel 200, in summer when there is no snowfall, the power generation amount on the back surface of the bifacial photovoltaic panel 200 can be restored by removing it. The removed snow melting device 100 can obtain a snow melting effect by being attached again in winter when it snows.

[0049] Figure 3 is a plan view showing an example of the shape of the snow melting device 100. As shown in Figures 3(A) to (C), the covering portion 110 of the snow melting device 100 can be formed in various shapes.

[0050] The left side of Figure 3(A) shows a power generation module 220 formed by combining a plurality of power generation cells 210 which are the minimum constituent units of a photovoltaic cell. As shown on the right side of Figure 3(A), the covering portion 110 of the snow melting device 100 can also be formed in a shape adapted to the circumferential surface of the power generation module 220. Also, a plurality of power generation modules 220 provided with the snow melting device 100 on the circumferential surface can be combined.

[0051] The left side of Figure 3(B) shows a power generation string 230 formed by combining a plurality of power generation modules 220. As shown on the right side of Fig. 3(B), the covering part 110 of the snow melting device 100 can also be formed in a shape that conforms to the circumferential surface of the power generation string 230. Also, a plurality of power generation strings 230 provided with the snow melting device 100 on the circumferential surface can be combined.

[0052] The left side of Fig. 3(C) shows a power generation array 240 formed by combining a plurality of power generation strings 230. As shown on the right side of Fig. 3(C), the covering part 110 of the snow melting device 100 can also be formed in a shape that conforms to the circumferential surface of the power generation array 240. Also, a plurality of power generation arrays 240 provided with the snow melting device 100 on the circumferential surface can be combined.

[0053] Note that the bifacial photovoltaic panel 200 shown in this embodiment is formed by combining a plurality of power generation arrays, and the snow melting device 100 can also be a structure in which the covering part 110 is formed in a shape that conforms to its circumferential surface. Also, the covering part 110 of the snow melting device 100 can be formed not only in a frame shape but also in a shape of diagonal line intersections connecting opposing vertices of the bifacial photovoltaic panel 200.

[0054] Furthermore, the covering part 110 of the snow melting device 100 can form a coating film that blocks the light received on the back surface of the bifacial photovoltaic panel 200 by, for example, applying or spraying a synthetic resin paint from the back surface of the bifacial photovoltaic panel 200, and the coating film can block the light.

[0055] Also, by using a material that can be peeled off later for the synthetic resin paint to be applied or sprayed, in summer when there is no snowfall, the coating film can be peeled off to restore the power generation amount on the back surface of the bifacial photovoltaic panel 200. The snow melting device 100, which is the peeled coating film, can obtain a snow melting effect by applying or spraying again in winter when it snows.

[0056] Fig. 4 is a diagram showing a connection example of a bifacial photovoltaic panel with a snow melting device attached. When attaching the snow melting device 100 to a photovoltaic power generation device to which a plurality of double-sided photovoltaic panels 200 are connected as shown in Fig. 4, the snow melting device 100 can be attached to the back surfaces of all the double-sided photovoltaic panels 200, or the double-sided photovoltaic panels 200 with the snow melting device 100 attached and the double-sided photovoltaic panels 200 without the snow melting device 100 may be alternated.

[0057] In this case, compared with the case where the snow melting device 100 is attached to the back surfaces of all the double-sided photovoltaic panels 200, the amount of light blocked on the back surfaces of the double-sided photovoltaic panels 200 can be suppressed, and the power generation amount reduced by attaching the snow melting device 100 can be suppressed.

[0058] By alternately connecting the double-sided photovoltaic panels 200 with the snow melting device 100 attached and the double-sided photovoltaic panels 200 without the snow melting device 100 in this way, the snow accumulated through the following steps is removed.

[0059] First, by accumulating snow on the front surface of the double-sided photovoltaic panel 200, power generation does not occur on the front surface of the double-sided photovoltaic panel 200, but on the front surface of the double-sided photovoltaic panel 200, power generation can be achieved by receiving reflected light from the ground or the like.

[0060] As described above, heat is generated due to the occurrence of the hot spot phenomenon on the back surface of the double-sided photovoltaic panel 200 with the snow melting device 100 attached. When the heat generated on the back surface of the double-sided photovoltaic panel 200 with the snow melting device 100 attached is transmitted to the front surface of the double-sided photovoltaic panel 200, the snow accumulated on the front surface of the double-sided photovoltaic panel 200 with the snow melting device 100 attached is melted and removed.

[0061] At this time, in the double-sided photovoltaic panel 200 with the snow melting device 100 attached, since the accumulated snow has been removed, a power generation amount of 100% on the front surface and 20% on the back surface can be obtained, but in the double-sided photovoltaic panel 200 without the snow melting device 100 attached, power generation cannot be achieved on the front surface because the accumulated snow remains on the front surface.

[0062] When electricity generated by the double-sided photovoltaic panel 200 with the snow melting device 100 attached flows into the double-sided photovoltaic panel 200 without the snow melting device 100 attached, the resistance value of the surface of the double-sided photovoltaic panel 200 without the snow melting device 100 attached increases.

[0063] As a result, it becomes difficult for current to flow on the surface of the double-sided photovoltaic panel 200 without the snow melting device 100 attached, and a hot spot phenomenon occurs on the surface of the double-sided photovoltaic panel 200 without the snow melting device 100 attached.

[0064] Due to the hot spot phenomenon generated on the surface of the double-sided photovoltaic panel 200 without the snow melting device 100 attached, the surface of the double-sided photovoltaic panel 200 without the snow melting device 100 attached generates heat and melts the accumulated snow.

[0065] As described above, through the steps of heat generation due to power generation on the back surface of the double-sided photovoltaic panel 200 with the snow melting device 100 attached, melting of the snow accumulated on the surface of the double-sided photovoltaic panel 200 with the snow melting device 100 attached, power generation by the surface of the double-sided photovoltaic panel 200 with the snow melting device 100 attached, heat generation due to the electricity generated by the surface of the double-sided photovoltaic panel 200 with the snow melting device 100 attached flowing to the surface of the double-sided photovoltaic panel 200 without the snow melting device 100 attached, and melting of the snow accumulated on the surface of the double-sided photovoltaic panel 200 without the snow melting device 100 attached, the snow accumulated on the double-sided photovoltaic panel 200 is removed.

[0066] In addition, in FIG. 4, a photovoltaic device in which a plurality of double-sided photovoltaic panels 200 are connected is described as an example. However, it is not necessary for all of the photovoltaics connected to the photovoltaic device to be double-sided photovoltaic panels 200. It is also possible to combine a single-sided photovoltaic panel provided with power generation cells only on the surface and the double-sided photovoltaic panel 200. Also in this case, the snow melting device 100 is attached to the back surface of the double-sided photovoltaic panel 200.

Explanation of Reference Numerals

[0067] 100 Snow melting device 110 Coating part

Claims

1. A snow melting device that melts snow that has accumulated on a double-sided photovoltaic panel, a covering portion that blocks and covers at least a portion of the light received by the power generating cells arranged on the back surface of the double-sided photovoltaic panel, which is the side on which snow does not accumulate; A snow melting tool comprising:

2. The covering portion is being provided around a power generation module constituted by a plurality of the power generation cells; 2. The snow melting tool according to claim 1,

3. The covering portion is being provided around a power generation string constituted by a plurality of the power generation modules; 3. The snow melting tool according to claim 2,

4. The covering portion is being provided around a power generation array constituted by a plurality of the power generation strings; 4. The snow melting tool according to claim 3.

5. The covering portion is being provided around a power generation panel constituted by a plurality of the power generation arrays; 5. The snow melting tool according to claim 4,

6. The surface color of the coating portion is Being black, 2. The snow melting tool according to claim 1,

7. The covering portion is A coating film formed by applying or spraying a light-blocking paint onto the back surface of the bifacial photovoltaic panel; 2. The snow melting tool according to claim 1,

8. A method for melting snow using a snow melting tool having a covering part that blocks and covers at least a portion of light received by power generating cells arranged on a back surface of a bifacial photovoltaic panel, the back surface being the side on which snow does not accumulate, comprising: generating electricity on a back surface of the bifacial photovoltaic panel; a step of generating heat at a portion covered by the covering portion by generating electricity at a rear surface of the bifacial photovoltaic panel; A snow melting method comprising:

9. In bifacial photovoltaic panels that melt accumulated snow, a covering portion that covers and blocks at least a portion of the light received by the power generating cells arranged on the back surface, which is the side on which snow does not accumulate; A double-sided photovoltaic panel comprising:

10. A method for melting snow using a double-sided photovoltaic panel having a covering portion that blocks and covers at least a portion of light received by power generating cells arranged on a back surface, which is the side on which snow does not accumulate, comprising: generating electricity on a back surface of the bifacial photovoltaic panel; a step of generating heat at a portion covered by the covering portion by generating electricity at a rear surface of the bifacial photovoltaic panel; A snow melting method comprising:

11. In a photovoltaic power generation device that melts snow that has accumulated on a photovoltaic panel, At least one photovoltaic panel of the photovoltaic panel connection structure, which is a plurality of connected photovoltaic panels, a double-sided photovoltaic panel including a covering portion that blocks and covers at least a portion of the light received by the power generating cells arranged on the back surface, which is the side on which snow does not accumulate; A photovoltaic device comprising:

12. The photovoltaic panel connection structure includes: The bifacial photovoltaic panel and the photovoltaic panel not including the covering portion are alternately connected to each other. The photovoltaic device according to claim 11 .

13. In a method for melting snow using a photovoltaic device, at least one of the photovoltaic panels in a photovoltaic panel connection structure, which is a plurality of connected photovoltaic panels, is a double-sided photovoltaic panel having a covering portion that blocks and covers at least a portion of the light received by the power generation cells arranged on the back surface, which is the side on which snow does not accumulate, the method comprising the steps of: generating electricity on a back surface of the bifacial photovoltaic panel; a step of generating heat at a portion covered by the covering portion by generating electricity at a rear surface of the bifacial photovoltaic panel; A snow melting method comprising:

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