KR101381949B1 - cooling method and apparatus of solar module - Google Patents

Abstract

The solar module cooling apparatus of the present invention is installed to be adjacent to the photovoltaic modules that are installed on the frame and is connected to the branch pipe is installed with a plurality of mist spray nozzles, the connection pipe is connected to the branch pipe is installed with the mist spray nozzles And a cooling water supply unit connected to the connection pipe and supplying water for forming fog, a temperature detection unit installed around the solar module to detect a temperature of the solar module and an ambient temperature, and the temperature And a controller for controlling the cooling water supply unit according to the information detected by the detection unit to generate mist for cooling around the solar module from the mist spray nozzle.

Description

Cooling method and apparatus of solar module

The present invention relates to a cooling method and a cooling device of a solar power module, and more particularly, to a cooling method and a device of a solar module that can improve the power generation efficiency by cooling the solar module using the atomized cooling water. It is about.

Generally, the method of using solar energy is divided into a method using solar heat and a method using sunlight. The method of using solar heat is the method of heating and generating power using water heated by the sun, etc. The method of using solar power generates electricity by using the sun's light, and can operate various machines and appliances by the electricity. This is called solar power.

Among the above-mentioned methods, photovoltaic power generation is a photovoltaic effect in which a photovoltaic panel having n-type doping on a silicon crystal and pn-junction is irradiated with sunlight to generate an electromotive force due to the photovoltaic energy, To generate electricity. For this purpose, a solar cell for collecting sunlight, a photovoltaic module as an aggregate of solar cells, and a solar array for uniformly arranging solar cells are required. For example, when light is incident on the solar module from the outside, electrons in the conduction band of the p-type semiconductor are excited to the valence band by the incident light energy. One electron-hole pair (EHP) is formed inside the p-type semiconductor, and electrons among the electron-hole pairs generated are transferred to the n-type semiconductor by an electric field existing between pn junctions. It passes over and supplies current to the outside.

On the other hand, the efficiency of the photovoltaic module used in the photovoltaic power generation system is the most important factor that determines the economical efficiency of the photovoltaic power generation in the range of about 16 to 18% for the mainstream polycrystalline silicon material. In order to continuously improve such power generation efficiency, maintenance and repair through various devices is essential.

However, solar cells, photovoltaic modules, and photovoltaic arrays for condensing solar light cause an output degradation of about 0.5% when the temperature rises due to photovoltaic condensation, resulting in about 0.5% of power generation. In one example, the amount of power generated is higher in spring and autumn than in summer when the amount of solar light is collected. In other words, since the solar module is overheated in summer due to the large amount of insolation, the power generation efficiency is reduced by 20-30% compared to the maximum value.

In view of this, Patent Application No. 2008-45065 discloses a photovoltaic module management system using a water jet. The solar module management system using the water jet has a structure that cools by spraying high pressure water onto the surface of the solar module through the water jet, causing water to remain on the surface of the solar module, causing foreign matter to adhere. It is necessary to supply a relatively large amount of water to cool the optical module. In particular, when the coolant is supplied to the inclined photovoltaic module, the water flows away quickly, and thus less water remains on the surface of the photovoltaic module, so it is difficult to expect a cooling effect due to latent heat of evaporation.

Republic of Korea Patent Publication No. 2011-0053610 discloses a device for improving the efficiency of the solar power plant. The published device has a configuration in which water is injected into the solar module and the water is recovered and recycled.

Patent No. 1097901 discloses a solar module cooling device for cooling by spraying water on a solar module, and Patent Publication No. 2010-0026568 discloses a water-cooled solar position tracking power generation device. 2011-043118 discloses a photovoltaic position tracking generator with a water spray device.

The above-described solar module cooling device has a problem as described above because the cooling water is directly injected, and the cooling of the sun and the module is limited to the portion to which the cooling water is sprayed, so it is difficult to uniformly cool the solar module.

The present invention is to solve the problems described above, it is possible to uniformly cool each part of the solar module, and to provide a cooling device for a solar module that can improve the power generation efficiency.

Another object of the present invention is to provide a cooling device of a solar module that can lower the temperature around the solar module.

Cooling method of the solar module of the present invention for achieving the above object,

A mist nozzle installation step of installing a branch pipe having a mist spray nozzle connected to a connection pipe around the photovoltaic modules installed in the frame, and injecting coolant or cooling water and air into the connected pipe to supply cooling water to the branch pipe. And a mist spraying step of spraying mist for lowering the temperature of the solar module and the temperature of the solar module.

In the present invention, the outside air heat blocking step of blocking the external heat by spraying the mist continuously from the mist spray nozzle installed in the branch pipe located at the edge of the solar module, and located between the branch pipes located at the edge It is further provided with a selective mist spraying step for the mist is intermittently sprayed from the mist spray nozzles of the branch pipes.

The solar module cooling apparatus according to the present invention for achieving the above object is installed adjacent to the photovoltaic modules to be installed in the frame and installed a plurality of branch pipes and a plurality of fog spray nozzles, the branch pipes are installed mist spray nozzles A connection pipe connected to the connection pipe, a cooling water supply unit connected to the connection pipe to supply water for forming a fog, and a temperature detection device installed around the solar module to detect a temperature of the solar module and an ambient temperature And a controller for controlling the cooling water supply unit according to the information detected by the temperature detecting unit to generate mist for cooling around the solar module from the mist spray nozzle.

The cooling water supply unit includes a tank for supplying cooling water and a pump installed in the connecting pipe to control the controller by pumping water from the tank to the connecting pipe, and the branch pipe is supplied from the connecting pipe to form fog. A solenoid valve is provided to control the supply of cooling water. The temperature detection unit includes a first temperature sensor for detecting a temperature of the solar module and a second temperature sensor for measuring an ambient temperature adjacent to the solar module. Equipped.

The cooling method of the solar module and the cooling device of the solar module of the present invention for the development of the present invention can lower the temperature of each part and the surroundings of the solar module can maximize the cooling efficiency of the solar module, the season It is possible to reduce the deviation of the amount of power generated by the solar power module.

1 is a plan view showing a solar module cooling apparatus according to the present invention,
Figure 2 is a side view showing a cooling state of the solar module by the mist spray nozzle according to the present invention,
3 is a cross-sectional view of the mist spray nozzle shown in FIG.

The solar module cooling apparatus according to the present invention is to cool the solar modules by spraying a mist on the solar modules and the surroundings thereof, an embodiment of which is shown in FIGS. 1 to 3.

Referring to the drawings, the solar module cooling device 10 is for cooling the solar modules 100 installed in the mainframe 11 installed on the ground or building, so as to be adjacent to the solar modules 100. Branch pipes 21 to which the mist spray nozzles 30 are installed are provided, and a cooling water supply unit 20 for supplying cooling water for mist spraying to the connection pipe 22 connected to the branch pipe 21. . The cooling water supply unit 20 is connected to the tank 23 in which the coolant for cooling the solar module 100 is stored and the connection pipe 22 to cool the water in the tank 23 to the connection pipe 22. A pump 24 is provided for pumping. The water supply unit 20 is a solenoid valve 25 to control the supply of cooling water to the mist spray nozzle 21 through the branch pipe 21 at the inlet side of each branch pipe 21 connected to the connecting pipe 22. Are installed.

The cooling device 10 is installed around the solar module to detect the temperature of the solar module and the ambient temperature, and the information detected by the temperature detection unit 40. And a controller 50 for controlling the cooling water supply unit 20 to generate mist for cooling from the mist spraying lines 30 around the solar module.

The temperature detection unit 40 has a first temperature sensor 41 for measuring the temperature of the photovoltaic module 100 and a second for being adjacent to the photovoltaic module 100 to measure the ambient temperature. The temperature sensor 42 is provided. The temperature detection unit 40 may further include a third temperature sensor (not shown) for measuring a temperature between the lower portion of the solar module or between the solar modules 100.

The control unit 50 controls the operation of the pump 24 based on the signal of the solar module 100 or the first and second temperature sensors 41 and 42 for sensing the ambient temperature, The solenoid valve 25 installed in the engine 21 is controlled to control the supply of water. And each branch pipe 21 is provided with an auxiliary branch pipe 21a for injecting fog on the surface of the photovoltaic module 100, as shown in Figure 2, the fog at the end of the auxiliary branch pipe (21a) Injection nozzle 30 may be installed. In addition, the water level is controlled by a water level sensor installed in the tank 23 in which the coolant is stored. The control of the water level drives a coolant supply pump for pumping the valve or groundwater installed in the raw water pipe to the tank 23. . The power source for driving the cooling device may be electricity generated in the solar module, but is not limited thereto. A separate solar module for driving the cooling device may be installed, and the electricity generated from the solar module may be used. Can be driven.

On the other hand, the mist spray nozzle 30 is installed in the branch pipe 21 is installed in the nozzle body 31 and the nozzle body 31 is installed so as to communicate with the branch pipe 21 as shown in FIG. The vortex generating member 32 and the vortex generating member 32 having a spiral groove formed on its front surface to rotate the cooling water supplied through the hollow of the nozzle body 31 in a spiral direction, and the injection hole 33 by surrounding the vortex generating member 32. The cap 34 is formed and coupled to the nozzle body 31.

And the cap 34 or the nozzle body 31 is provided with an air injection unit 35 for injecting air to the injection hole 33 or the vortex generating member 32 to increase the rotational force of the cooling water, in this case A compressor (not shown) for supplying a predetermined pneumatic pressure to the air injection unit 35 may be further provided.

On the other hand, the cooling method of the photovoltaic module according to the present invention is a fog nozzle for installing a branch pipe (21) provided with a mist spray nozzle (30) connected to the connecting pipe (22) around the photovoltaic module (100) installed in the frame And a mist spraying step of spraying mist to lower the temperature of the photovoltaic module and the ambient temperature of the photovoltaic module by injecting the cooling water or the coolant and the air into the connected tube to supply the cooling water to the branch pipe. Include.

The mist spraying step is an external air heat blocking step of blocking external heat by spraying mist continuously from the mist spray nozzles installed in the branch pipe located at the edge of the solar module, and located between the branch pipes located at the edge The method may further include a selective mist spraying step of allowing mist to be intermittently sprayed from the mist spray nozzles of the branch pipes. In the selective fog spraying step, when the temperature of the photovoltaic module rises above the temperature set in the controller, the photovoltaic module may be cooled by spraying the fog through the mist spray nozzle on the side corresponding thereto.

Referring to the operation of the solar module cooling apparatus according to the present invention configured as described above and the solar module cooling method through the same as follows.

In order to cool the photovoltaic module 10 that is being generated using the photovoltaic module cooling device 10 according to the present invention, the temperature of the photovoltaic module 100 is controlled by the first and second temperature sensors 41 and 42. And the ambient temperature is detected. When the temperature is higher than the temperature set by the signal detected by the temperature detection unit 40, the controller 50 drives the pump 24 installed in the connecting pipe 21 to pump the cooling water of the tank 23. As described above, the cooling water pumped through the connecting pipe 22 is supplied to the branch pipe 21, and the supplied cooling water is sprayed in the atomized state through the mist spray nozzle 23 installed in the branch pipe 21.

In the process as described above, the branch pipe 21 positioned at the edge of the photovoltaic module is continuously sprayed with mist by the operation of the solenoid valve to prevent the heated outside air from entering the region where the photovoltaic module is installed. do. In addition, the branching pipes 21 positioned between them, that is, between the two edges, can selectively operate the solenoid valve 25 installed thereon so that the fog can be generated intermittently. To prevent it from sticking and flowing down. That is, the fogged cooling water is attached to the surface of the photovoltaic module and then evaporated so that the remaining cooling water does not remain, thereby preventing generation of the power generation by the solar module 100 by the remaining cooling water.

In particular, the cooling method and the cooling device of the solar module of the present invention to increase the cooling and power generation efficiency by cooling the surroundings of the photovoltaic module as well as allowing the fine coolant particles attached to the surface of the solar module to evaporate within a short time. Can be.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims and their equivalents. Of course, such modifications are within the scope of the claims.

The cooling and leaving of the solar module of the present invention is widely applicable to not only a solar module but also various industrial machines of the air cooling method.

10; Solar module chiller.
Fog spray nozzle
40; Temperature detection unit
50; controller

Claims (4)

delete delete It is installed adjacent to the photovoltaic modules that are installed in the frame and is connected to the branch pipe 21 is provided with a plurality of mist spray nozzles 30, the branch pipe 21 is installed with the mist spray nozzles 30 A pipe 22, a cooling water supply unit 20 connected to the connection pipe 22 and supplying water for forming a mist, and installed around the solar module 100 to provide a solar module 100. A temperature detecting unit 40 for detecting a temperature and an ambient temperature, and controlling the cooling water supply unit 20 according to the information detected by the temperature detecting unit 40 to control sunlight from the mist spray nozzle 30. A controller 50 for generating fog for cooling around the module,
The cooling water supply unit includes a tank 23 for supplying cooling water and a pump installed in the connection pipe 22 and pumped by the controller 50 to pump water from the tank 23 to the connection pipe 22 ( 24, the branch pipe 21 is provided with a solenoid valve 25 is supplied from the connecting pipe to regulate the supply of cooling water to form a fog,
The temperature detection unit 40 includes a first temperature sensor 41 for detecting the temperature of the solar module, and a second temperature sensor 42 for measuring the temperature of the surroundings adjacent to the solar module 100. ,
The mist spray nozzle 30 spirally connects the nozzle body 31 installed to communicate with the branch pipe 21 and the cooling water installed in the nozzle body 31 and supplied through the hollow of the nozzle body 31. A vortex generating member 32 having a helical groove formed on its front surface to rotate, and a cap 34 which is formed with an injection hole 33 by surrounding the vortex generating member 32 and coupled to the nozzle body 31; Solar modules, characterized in that provided with the cap 34 is provided with an air injection unit 35 for injecting air into the injection hole 33 or the vortex generating member 32 to increase the rotational force of the cooling water Chiller.
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