TWI731670B - Method and device for improving power generation efficiency of double-sided solar panel - Google Patents

Abstract

The present invention provides a method for improving the power generation efficiency of a double-sided solar panel. The double-sided solar panel is arranged on the water surface. The water surface on the back side of the double-sided solar panel is splashed to increase the amount of sunlight irradiating the water surface. The amount of light incident on the back side of the double-sided solar panel by the reflected light and the diffused light is so as to improve the power generation efficiency of the back side of the double-sided solar panel.

Description

Method and device for improving power generation efficiency of double-sided solar panel

The present invention relates to a method and device for improving the power generation efficiency of a double-sided solar panel, in particular to a method and device that can improve the power generation efficiency of the side of the double-sided solar panel facing away from the sun.

In recent years, countries around the world have actively developed alternative energy sources, such as solar energy, wind energy, geothermal energy, hydropower and other natural energy sources to replace fossil fuels. Among them, the most eye-catching is solar power generation. Because solar power generation has the advantages of not being exhausted and easy to integrate with buildings, and the rapid development of semiconductor materials in recent years, the photoelectric conversion efficiency of solar energy has continued to increase, so solar power generation has gradually been widely used by consumers.

Solar power was originally developed as a single-sided solar panel power generation, that is, one side of the solar panel (that is, the front facing the sun) receives sunlight and converts it into electrical energy. However, with the requirement to further improve the power generation efficiency of solar panels, bi-facial solar power panels have also been developed in recent years. The double-sided solar power panel is capable of absorbing sunlight on both sides. In addition to the solar panel on the front, it can absorb sunlight, and the solar panel on the back can also absorb the reflected light from the sunlight on the installation surface. And diffuse light, so it can further improve the power generation output of the overall solar panel.

At present, many places are gradually adopting double-sided solar panels for power generation. In addition to being installed on the ground or on the roof of buildings, such double-sided solar panels are also used in snow or on water. Double-sided solar panels are used. The back of the panel absorbs the reflected light of sunlight hitting snow or water, in order to further increase the overall power generation output of the double-sided solar panel.

However, in addition to improving the power generation efficiency of the front side of the double-sided solar panel, how to improve the power generation efficiency of the back side is a subject that the related industry actively thinks about and wants to solve. In response to double-sided solar panels How to improve the power generation efficiency on the back of the double-sided solar panel will vary depending on the installation location.

The inventor focused on the situation of installing double-sided solar panels in large areas such as fish farms and lakes, and actively considered how to increase the power generation efficiency of the back of the double-sided solar panels. Therefore, many related documents were referred to.

For example, Patent Document 1 discloses a solar aerator installed on a fish farm, which is provided with a solar power generation device on a floating body above the aerator, and the solar power generation device is connected to the aerator through a cable , The electrical energy generated by the solar power generation device will be transmitted to the aerator through the cable, which will be used as the power source for the aerator to perform the oxygen aeration in the water. However, its main solution is the power supply method of the aerator on the fish farm. It does not mention how to increase the efficiency of the solar power generation device, and the solar panels used are also single-sided solar panels, so there is no mention of how to increase the solar energy. The content and teaching of power generation efficiency on the back of the panel.

[Prior Technical Literature] [Patent Literature]

Patent Document 1: Chinese New Patent 200320128522.7 Bulletin

Since the double-sided solar panel power generation system uses the front and back sides of the double-sided solar panel to absorb direct light, reflected light, and diffuse light from sunlight to convert light energy into electrical energy, the power generation efficiency on the back side of the solar panel is very important. However, as disclosed in Patent Document 1, if only solar power is used as the power source of the aerator, it cannot effectively solve the problem of improving the power generation efficiency of the backside of the double-sided solar panel. Proposals related to double-sided solar panel power generation device to improve the power generation efficiency on the back side of the double-sided solar panel. Therefore, the inventor of the present case devoted himself to improving the power generation efficiency of the back side of the double-sided solar panel installed on the water surface, and painstakingly studied, and finally completed the present invention.

The object of the present invention is to provide a method that can improve the power generation efficiency on the back side of a double-sided solar panel.

According to one aspect of the present invention, there is provided a method for improving the power generation efficiency of a double-sided solar panel, which is provided with a double-sided solar panel on the water surface, as the back of the double-sided solar panel Water splashes on the side of the water surface increase the amount of reflected light and diffused light incident on the back side of the double-sided solar panel by sunlight to increase the power generation efficiency of the back side of the double-sided solar panel.

In the above method, the method of splashing water on the water surface is one of the method of disturbing the water surface, the method of beating the water surface, or the spraying method, or a combination of these.

In the above method, the method of disturbing the water surface is to splash water on the water surface by swinging the object left and right on the water surface of the place where the double-sided solar panel is installed.

In the above method, the method of tapping the water surface is to tap an object up and down on the water surface of the place where the double-sided solar panel is installed to splash water on the water surface.

In the above method, the spraying method is to blow a strong jet of gas on the water surface where the double-sided solar panel is installed to splash water on the water surface, or to install a plurality of sprays under the water surface at the location where the double-sided solar panel is installed. The pipe body of the hole is used for blowing gas from the pipe body to eject the gas from the injection hole to splash water.

In the above method, the object is at least any one or a combination of propellers, waterwheel blades and liquid repellent sheets.

In the above method, the surface of the object is coated with varnish.

In the above method, the height of the splash from the water surface is 50 to 80 cm.

According to another aspect of the present invention, there is provided a power generation efficiency improvement device of a double-sided solar panel, which includes:

Double-sided solar panels, both sides can receive light energy to generate electricity;

The bracket is installed in a place with water to support the double-sided solar panel, and the angle or relative height can be adjusted relative to the water surface of the place with water;

The water splashing device is installed at or around the water place where the double-sided solar panel is installed, and is used to splash water on the water surface corresponding to the water place of the double-sided solar panel to increase the reflection and diffusion of light. Firing rate.

In the above device, the water splashing device is at least any one or a combination of propellers, waterwheel blades and liquid repellent sheets.

In the above device, the water splashing device is to install a plurality of pipes with spray holes under the water surface of the place where the double-sided solar panel is installed, and the pipes are used to blow gas to spray the gas from the spray holes to splash Splash.

In the above device, the surface of the water splash device is coated with bright paint.

In the above device, the installation height of the double-sided solar panel relative to the water surface is 120-150 cm.

In the above device, the setting angle of the double-sided solar panel relative to the water surface is 8-15 degrees.

In the above device, the height of the water splash from the water splash device is 50-80 cm from the water surface.

According to the power generation efficiency improvement method of the double-sided solar panel and the power generation efficiency improvement device of the double-sided solar panel of the present invention, water splashes are excited by the water surface to increase the reflectivity, thereby improving the power generation efficiency of the solar panel.

1: Double-sided solar panel

10: Bracket

20: Splashing device

100: Power generation efficiency improvement device for double-sided solar panels

H1: height

a: angle

FIG. 1A is a schematic side view showing the power generation efficiency improvement device of the double-sided solar panel related to the present invention, in a state where the water splashing mechanism is not splashing water. FIG. 1B is a schematic side view showing the power generation efficiency improvement device of the double-sided solar panel related to the present invention, showing a state where the water splashing device is splashing water.

Fig. 2 is a schematic plan view showing a bracket equipped with a double-sided solar panel.

Fig. 3 is a perspective view schematically showing a bracket equipped with a double-sided solar panel.

Fig. 4 is a diagram showing another embodiment of the water splash device.

Hereinafter, the power generation efficiency improvement method of the double-sided solar panel and the power generation efficiency improvement device of the double-sided solar panel related to the present invention will be described in detail with reference to the drawings. 1A and FIG. 1B are schematic side views of the power generation efficiency improvement device 100 of the double-sided solar panel 1 related to the present invention. FIG. 1A is a state where the water splashing device 20 is not splashing water, and FIG. 1B is a state where the water splashing device 20 is splashing water. FIG. 2 is a schematic plan view of the bracket 10 equipped with a double-sided solar panel 1, and FIG. 3 is a perspective view schematically showing the bracket 10 equipped with a double-sided solar panel 1.

The method for improving the power generation efficiency of the double-sided solar panel 1 according to the present invention is particularly suitable for the double-sided solar panel installed on the water surface. The water surface on the back side of the double-sided solar panel is splashed to increase the sunlight to the water surface. The amount of reflected light and diffused light incident on the back side of the double-sided solar panel improves the power generation efficiency of the back side of the double-sided solar panel.

In the method for improving the power generation efficiency of the double-sided solar panel 1 related to the present invention, the method of splashing water on the water surface is one of the water surface disturbance method, the water surface beating method or the spray method or a combination thereof.

In the above method, the method of disturbing the water surface is to splash water on the water surface by swinging the object left and right on the water surface of the place where the double-sided solar panel is installed.

In the above-mentioned method, the method of tapping the water surface is by tapping the object up and down on the water surface of the place where the double-sided solar panel is installed to splash water on the water surface.

In the above method, the frequency of the method of perturbing the water surface or beating the water surface is 2 to 3 times per second.

In the above method, the spraying method is to blow a strong jet of gas on the water surface where the double-sided solar panel is installed to splash water on the water surface, or to install a plurality of sprays under the water surface at the location where the double-sided solar panel is installed. The pipe body of the hole is used for blowing gas from the pipe body to eject the gas from the injection hole to splash water.

In the above method, the gas pressure of the spraying method is 18kg/cm ² G~35kg/cm ² G.

[Elevation device for power generation efficiency of double-sided solar panels]

(Bracket)

As shown in FIG. 1A and FIG. 1B, the power generation efficiency improvement device 100 of the double-sided solar panel 1 of the present invention has a bracket 10 and a water splash device 20. The bracket 10 is erected on the water surface to fix and hold a plurality of the double-sided solar panels 1. The double-sided solar panel 1 is a solar panel with power generation modules installed on both sides. The solar panel installed on the front directly receives sunlight, and the solar panel installed on the back also receives sunlight. Sunlight irradiates the reflected light or diffused light of the installation surface (the water surface in the present invention), thereby improving the overall power generation efficiency of the solar panel.

An embodiment of the double-sided solar panel 1 arranged on the support 10 is shown in FIGS. 2 and 3. A plurality of double-sided solar panels 1 are arranged on the support 10, and the arrangement or number of the double-sided solar panels 1 is not particularly limited, and can be set arbitrarily according to the demand of power generation.

Corresponding to the installation range of the double-sided solar panel 1, a water splashing device 20 is provided under or around the double-sided solar panel 1. The water splash device 20 is used to splash water on the water surface to increase the reflectivity and diffusion rate of sunlight irradiated on the water surface, thereby improving the power generation efficiency of the back side of the double-sided solar panel 1.

The bracket 10 is configured to adjust the installation height of the double-sided solar panel 1 relative to the water surface. In the present invention, the support 10 is set at a position of 120 to 150 meters, such as 130 meters, relative to the water surface (ie, the height H1 in FIG. 10). If the double-sided solar panel 1 is too close to the water surface, the path of sunlight illuminating the water surface will be blocked by the double-sided solar panel 1, thereby affecting the amount of scattered light or diffused light absorbed by the back of the double-sided solar panel. If the double-sided solar panel 1 is too far away from the water surface, although it can receive more light, the double-sided solar panel 1 will be shaken by wind and other factors due to the height. Long-term shaking will cause the double-sided solar panel The lifetime of 1 is shortened, so the height H1 of the double-sided solar panel 1 relative to the water surface is preferably in the range of 120-150. In addition, the height of the splashed water will affect the degree of reflection and diffusion of sunlight. The inventor’s experiments have verified that the height of the splashed water splashed by the water splashing device 20 from the water surface (ie, the height H2 in FIG. 1B) ) Should be 50~80 cm.

In addition, in order to enable the front side of the double-sided solar panel 1 to receive the most sunlight, and to reduce the impact of falling dust or water on the power generation output of the solar panel, the bracket 10 is configured to adjust the double-sided solar panel 1 to It is at an appropriate angle relative to the water surface, such as an inclination angle of 8 degrees (ie, angle a in Figure 1). Taking into account the incident angle of the sun and the inclination angle of the earth's rotation axis, the inclination angle a of the double-sided solar panel 1 with respect to the water surface is preferably in the range of 8 to 15 degrees.

(Water splash device)

The present invention mainly uses water splashes to increase the reflectivity and diffusion rate of sunlight on the water surface, thereby improving the power generation efficiency on the back side of the double-sided solar panel 1. Therefore, the water splashing device 20 can be used on the water surface. Splashing water is not particularly limited to the implementation type.

The water splash device 20 is installed below or around the double-sided solar panel 1. The method of splashing water can be, for example, one of the method of disturbing the water surface, the method of tapping the water surface, or the method of spraying, or a combination thereof.

For example, the method of disturbing the water surface may be to splash water on the water surface by swinging objects left and right on the water surface of the place where the double-sided solar panel 1 is installed.

The method of tapping the water surface can be by tapping an object up and down on the water surface of the place where the double-sided solar panel 1 is installed to splash water on the water surface. The spraying method can be to blow a strong jet of gas on the water surface where the double-sided solar panel 1 is installed to splash water on the water surface, or to install a plurality of spray holes under the water surface where the double-sided solar panel 1 is installed The tube body is used to blow gas from the tube body and spray the gas from the spray hole to splash water. For example, as shown in FIG. 4, a plurality of pipe bodies 21 are installed under the water surface of a place where the double-sided solar panel 1 is installed. The length direction of the pipe body 21 is provided with a plurality of injection holes (not shown in the figure). The press 22 supplies gas to the tube body 21, and sprays the gas from the injection hole to splash water.

In addition, the device for splashing water (that is, the water splashing device 20 of the present invention) can be at least any one of a rotating propeller, a waterwheel blade, and a liquid-repellent sheet body that disturbs the water surface left and right or up and down. combination. For example, the water splash device 20a shown in FIG. 1B uses waterwheel blades to disturb the water surface below the water splash device body, and the water splash device 20b shown in FIG. 1B uses waterwheel blades to disturb the water surface on the side of the water splash device body.

In addition, it is also possible to further coat the surface of the propeller, waterwheel blade or liquid-repellent sheet with silver-white or white gloss paint to increase the reflective efficiency of the propeller, and to further enhance the sunlight to the propeller after the reflective treatment. , Reflectivity and diffusion rate of waterwheel blades or liquid repellent sheet.

【Evaluation Test】

Hereinafter, the evaluation test 1 and the evaluation test 2 are conducted for the power generation efficiency improvement effect of the back side of the double-sided solar panel 1 related to the present invention.

The double-sided solar panel 1 of the evaluation test 1 is installed at a height of 2.4 meters from the water surface. The double-sided solar panel 1 of the evaluation test 2 was installed at a height of 1.8 meters from the water surface. In evaluation test 1 and evaluation test 2, the power generation efficiency of the front and back sides of the double-sided solar panel is measured every hour with and without water splashing, and the measurement results are displayed on the Table 1.

In Evaluation Test 1 and Evaluation Test 2, the ratio (%) of the power generation efficiency on the back side of the double-sided solar panel 1 compared with the power generation efficiency on the front side under the condition of water splashing is better than that of the case without water splashing. The high. In detail, in the evaluation test 1, in the case of water splashing, the ratio (%) of the power generation efficiency on the back side compared to the power generation efficiency on the front side (%) was increased from 7.9% to 12.4% compared to the case without water splashing. (Increase by 4.5%). In the evaluation test 2, the ratio (%) of the power generation efficiency on the back side compared to the power generation efficiency on the front side under the condition of water splashing was increased from 11.8% to 17.1% (an increase of 5.3%). ).

In addition, in the evaluation test 2 where the installation height of the double-sided solar panel 1 is 1.8m under the condition of water splashing, the ratio (%) of the power generation efficiency on the back side to the power generation efficiency on the front side is 17.1%. It is better than evaluation test 1 (12.4% in evaluation test 1) where the installation height of the double-sided solar panel 1 is 2.4m.

Therefore, it can be seen from Table 1 that water splashes on the water surface can effectively increase the reflectivity and diffusion rate of sunlight on the water surface, thereby improving the power generation efficiency on the back side of the double-sided solar panel 1.

Above, the power generation efficiency improvement method of the double-sided solar panel and the power generation efficiency improvement device of the double-sided solar panel of the present invention have been described. However, the present invention is not limited to this, and various substitutions or changes can be made without departing from the content of the scope of the patent application.

According to the power generation efficiency improvement method of the double-sided solar panel and the power generation efficiency improvement device of the double-sided solar panel of the present invention, the reflectivity and diffusion rate of sunlight irradiated on the water surface can be increased, thereby improving the back side of the double-sided solar panel. Power generation efficiency to improve the power generation efficiency of double-sided solar panels as a whole.

1: Double-sided solar panel

10: Bracket

20: Splashing device

100: Power generation efficiency improvement device for double-sided solar panels

H1: height

a: angle

Claims (15)

A method for increasing the power generation efficiency of a double-sided solar panel is that a double-sided solar panel is arranged on the water surface. The water surface on the back side of the double-sided solar panel is splashed to increase the reflected light and diffusion of the sunlight on the water surface. The amount of incident light incident on the back side of the double-sided solar panel improves the power generation efficiency of the back side of the double-sided solar panel. For example, the method for improving the power generation efficiency of the double-sided solar panel in the scope of the patent application, the method of splashing water on the water surface is one of the water surface disturbance method, the water surface slap method or the spray method or a combination of these methods. For example, the method for improving the power generation efficiency of the double-sided solar panel in the scope of the patent application, wherein the method of disturbing the water surface is to splash on the water surface by swinging the object left and right on the water surface of the place where the double-sided solar panel is installed Splash. For example, the method for improving the power generation efficiency of the double-sided solar panel in the scope of the patent application, wherein the water surface beating method is to splash an object on the water surface of the place where the double-sided solar panel is installed to splash water on the water surface. For example, the method for improving the power generation efficiency of double-sided solar panels in the scope of patent application, wherein the spraying method is to blow a strong jet of gas on the water surface of the place where the double-sided solar panel is installed to splash water on the water surface, or to install In the place where the double-sided solar panel is located, a plurality of pipes with spray holes are arranged under the water surface, and the pipes are used to blow gas to spray the gas from the spray holes to splash water. For example, the method for improving the power generation efficiency of double-sided solar panels in the scope of patent application 3 or 4, wherein the object is at least any one or a combination of propellers, waterwheel blades and liquid repellent sheets. For example, the method for improving the power generation efficiency of double-sided solar panels in the scope of the patent application, in which the surface of the object is coated with bright paint. For example, the method for improving the power generation efficiency of double-sided solar panels in any one of items 1 to 5 of the scope of patent application, the height of the splash from the water surface is 50 to 80 cm. A double-sided solar panel power generation efficiency improvement device, which is provided with: a double-sided solar panel, which can receive light energy on both front and back sides to generate power; a bracket is installed in a water place to support the double-sided solar panel , It can adjust the angle or relative height relative to the water surface of the water place; and The water splashing device is installed at or around the place where the double-sided solar panel is installed with water, and is used to splash water on the water surface corresponding to the place with water of the double-sided solar panel to increase the reflectivity of light and Diffuse rate. For example, the power generation efficiency improvement device of double-sided solar panels in the scope of patent application, wherein the water splashing device is at least any one or a combination of propellers, waterwheel blades and liquid repellent sheets. For example, the power generation efficiency improvement device of double-sided solar panel in the scope of patent application, wherein the water splashing device is provided with a plurality of pipes with spray holes under the water surface of the place where the double-sided solar panel is installed, and is used in the pipe The body blows gas and ejects the gas from the injection hole to splash water. For example, the power generation efficiency improvement device of the double-sided solar panel of the 9th or 10th patent application, in which the surface of the water splash device is coated with bright paint. For example, the power generation efficiency improvement device of the double-sided solar panel in any one of items 9 to 11 in the scope of patent application, wherein the installation height of the double-sided solar panel relative to the water surface is 120 to 150 cm. For example, the power generation efficiency improvement device of the double-sided solar panel in any one of items 9 to 11 in the scope of patent application, wherein the installation angle of the double-sided solar panel relative to the water surface is 8-15 degrees. For example, the power generation efficiency improvement device for double-sided solar panels in any one of items 9 to 11 of the scope of patent application, wherein the height of the spray splashed by the water splashing device is 50 to 80 cm from the water surface.

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