KR20200104056A - Temperature reduction and cleaning system for photovoltaic module - Google Patents

Abstract

The present invention relates to a temperature reduction and cleaning system for a photovoltaic module. More specifically, the temperature reduction and cleaning system for a photovoltaic module comprises: one or more heat exchange units installed on the rear surface of a photovoltaic module to cool the heat generated from the photovoltaic module to flow cooling water therein; a cooling water supply means supplying cooling water stored in a cooling water storage tank to the heat exchange units; a hot water storage tank in which the cooling water, which becomes hot through an endothermic reaction while passing through the heat exchange units, is discharged and stored through a cooling water discharge line; a cleaning means including a movable guide rail installed on upper and lower sides or left and right sides on the exterior of top of the photovoltaic module; a cleaning water distribution pipe provided with a plurality of cleaning water spray nozzles to spray cleaning water while moving along the movable guide rail since both ends are movably fixed to both sides of the movable guide rail, and a step motor for controlling movement of the cleaning water distribution pipe; a cleaning water supply means installed between the hot water storage tank and a cleaning water sprinkler pipe since the cleaning of a surface of the photovoltaic module is made by supplying hot water stored in the hot water storage tank to the cleaning water distribution pipe; and a controller unit provided with a microcomputer for controlling an operation of a cleaning means for automatically/passively controlling the cooling water supply means and cleaning the photovoltaic module and controlling supply of the cleaning water of the cleaning water supply means according to a set program.

Description

Temperature reduction and cleaning system for photovoltaic module}

The present invention relates to a photovoltaic module temperature reduction and cleaning system, and more particularly, a photovoltaic module that performs photovoltaic power generation prevents a decrease in power generation efficiency due to a high temperature phenomenon in summer, and is used for cooling the photovoltaic module. The present invention relates to a solar module temperature reduction and cleaning system that enables cooling water that has become in a high temperature state to be used for cleaning solar modules at night and as hot water for home use.

Among the new and renewable energy fields, solar power generation is actively developing and commercializing technologies.

Photovoltaic power generation technology is an infinite and clean technology that produces electricity from sunlight, showing an annual growth rate worldwide, and domestic photovoltaic power plants are also in the trend of continuous growth.

Among these photovoltaic power generation facilities, especially commercial photovoltaic power generation facilities are structured to generate profits by selling the generated power, so increasing the amount of electricity generated becomes a very important factor that determines the business feasibility. It is very important to be able to reduce the occurrence of failure by maintaining and managing.

In order to use such photovoltaic power generation facilities for commercial use, in general, there are no tall buildings around, but a wide bare ground where sunlight can be easily received regardless of the season, or a cleared field where there is no shade because there are no tall trees around. It is common to be installed on a large scale in the forest or in the forest.

In addition, in recent years, electricity generated through solar power generation is used for electricity used in factories or homes, and the remaining electricity is sold to a power company, so many solar power generation facilities are installed in general factories and homes. Has become.

Currently, most of the solar modules widely distributed and installed are silicon solar cells, which generate a lot of heat in the process of generating electricity through photochemical reactions by receiving sunlight, and several solar cells are assembled to form one module. When configured, each solar module generates a lot of heat.

In this way, the heat generated in the process of generating power in the solar module acts as a factor that lowers the power production efficiency, and when the temperature of the solar module rises by 1℃, the amount of power generation decreases by about 0.4 to 0.5%. Is known.

In particular, when the air temperature is high, such as in summer, the temperature of the solar module rises to 60 to 80°C, acting as a factor that greatly reduces power production efficiency.

In addition, as the air pollution problem becomes serious in recent years, as the air contains a lot of yellow dust or fine dust, it adheres to the surface of the solar module, and the light transmission and light absorption rate on the surface of the solar module decrease significantly. It is acting as a factor that further significantly lowers the solar power generation efficiency.

Therefore, companies that operate or construct solar power plants are making various efforts to increase the power production efficiency of solar modules.

Among them, as part of an effort to cool the heat generated by the photovoltaic module itself and prevent the amount of power generation from deteriorating, much effort is being put into the development of a cooling device and cleaning system that can cool and clean the photovoltaic module. Various ideas and inventions are being devised.

The cooling device applied to the solar module prevents the temperature of the solar module from rising by spraying coolant on the surface of the solar module where high heat is generated or by passing cooling water (including refrigerant) on the back of the solar module. In addition, the solar module cleaning system sprays or flows washing water on the surface of the solar module to wash away dust or foreign matter adhered to the surface of the solar module, or sprays the washing water using a separate cleaning member. Various types of cleaning and cooling devices, such as a cleaning device for wiping the module surface, have been proposed.

Most of these solar module cleaning devices or cooling systems are mainly used in summer when the atmospheric temperature is high. The conventional method of spraying cooling water on the surface of the solar module is to use room temperature water or water below room temperature. Since it is a spraying method on the surface, there is a limit to removing dust or foreign matter sticking to the surface of the solar module.

In addition, in the case of washing with a brush while spraying washing water on the surface of the solar module, scratches are generated on the surface of the solar module due to the friction of the brush and the friction of foreign substances, thereby lowering the light absorption rate, reducing power generation efficiency during long-term use. It became a factor.

In addition, the cooling system that indirectly reduces the temperature of the solar module while passing the cooling water through the back of the solar module has to pass through the coolant again, which has been heated while passing through the solar module, to discharge the absorbed heat. The device constituting the cooling system becomes large and complicated, and there is a disadvantage that a lot of cost is incurred when installing the device.

In particular, if these conventional solar module cooling devices and washing systems are separately installed, their efficiency will inevitably decrease, and the solar power generation device that generates electricity by installing on a small scale on the roof of a factory or a house There was a drawback of low cost-performance to apply.

-Patent Publication No. 10-2009-90722 (Publication date: 2009.08.26, Invention title: Solar module panel cleaning device) -Patent Publication No. 10-2015-52972 (published date: 2015.05.15, title of invention: cleaning device for solar module) -Patent Registration No. 10-1381949 (Registration date: 2014.03.31, Title of invention: Solar module cooling method and solar module cooling device)

The present invention was devised to overcome the disadvantages of the conventional solar module temperature reduction device or the solar module washing device. The cooling water used for cooling the solar module during the day is stored in a hot water state to provide sunlight at night. To provide a solar module temperature reduction and cleaning system that simplifies the configuration of solar power plant maintenance facilities and reduces installation costs by integrally configuring the cooling and cleaning devices for solar modules by allowing them to be used for module cleaning. It has its purpose.

In addition, the present invention is to provide a solar module cooling and cleaning system that allows the washing water stored in the hot water state to be used as hot water used indoors to save the heating cost of the home or office. There is another purpose.

In order to achieve the above object, the solar module temperature reduction and cleaning system according to the present invention is installed on the back side of the solar module to cool the heat generated from the solar module, and one or more heat exchange units that flow cooling water into the inside. ; Cooling water supply means for supplying the cooling water stored in the cooling water storage tank to the heat exchange unit; A hot water storage tank in which the coolant, which has become high temperature due to an endothermic reaction while passing through the heat exchange unit, is discharged and stored through a cooling water discharge line; A movable guide rail installed up and down or left and right on the upper outside of the photovoltaic module, and both ends are movably fixed to the movable guide rails on both sides to move along the movable guide rail to spray the washing water and wash water with a plurality of washing water spray nozzles A washing means comprising a distribution pipe and a step motor for controlling the movement of the washing water distribution pipe; A washing water supply means installed between the hot water storage tank and the washing water sprinkling pipe so that the surface of the solar module is cleaned by supplying the hot water stored in the hot water storage tank to the washing water sprinkling pipe at night under control of the controller unit; Including; a controller unit equipped with a microcomputer for automatically/manually controlling the cooling water supply means, controlling the operation of the washing means for washing the solar module, and controlling the washing water supply of the washing water supply means according to a set program; Done.

In addition, the cooling water discharge line through which the cooling water is discharged from the heat exchange unit to the hot water storage tank is provided with a temperature sensor for sensing the temperature of the cooling water and transmitting it to the controller. When using hot water indoors, the hot water in the hot water storage tank can be used. A hot water discharge pipe is installed between the hot water storage tank and the indoor boiler hot water supply line, and at the end of the hot water discharge pipe, a pressure sensing sensor that senses the internal pressure of the hot water discharge pipe and the internal pressure of the boiler hot water supply line, and the pressure sensing sensor sensed by the pressure sensing sensor. It consists of a configuration provided with a hot water supply control means including a check valve that regulates the opening and closing of the hot water discharge pipe according to the control of the controller unit receiving the pressure data.

In addition, the microcomputer of the controller unit includes a cooling water supply control unit that controls the supply of cooling water to the heat exchange unit, a cooling water storage management unit that manages cooling water stored in the cooling water storage tank, and the temperature data of the cooling water transmitted from the temperature sensor. A cooling water temperature detection/determining unit for comparing and determining the temperature with set reference data, a washing water supply control unit for controlling the supply of washing water to the washing water supply unit, a washing means movement control unit for controlling movement of the washing means, and the hot water storage tank A hot water discharge management unit that controls the hot water discharge to supply the hot water stored in the indoor hot water, and a power generation amount monitoring unit to monitor the power generation amount of the inverter side to which the power produced by the solar module is introduced.

In particular, the washing water supply control unit is configured to adjust the water pressure of the washing water supplied to the washing water sprinkling pipe for cleaning the solar module, but the initial operation in which the washing water sprinkling pipe reciprocates the entire surface area of the solar module (1~ In the case of 3), the water pressure of the supplied washing water is maintained at a low pressure so that foreign substances sticking to the surface of the solar module can be soaked by drip spraying of the washing water, and the second movement of the washing water sprinkling pipe (4 to 6 times) The water pressure of the supplied washing water is maintained at a high pressure, and foreign matters called from the surface of the photovoltaic module are desorbed by the water pressure sprayed from the spray nozzle to perform cleaning.

In addition, the cooling water supply control unit, when the temperature received from the water temperature sensor provided in the cooling water discharge line is higher than a set reference temperature, or the generation amount data obtained from the generation amount monitoring unit is less than the reference generation amount. It is configured to automatically supply cooling water to cool the solar module.

The solar module temperature reduction and cleaning system according to the present invention having the above-described configuration supplies cooling water to the heat exchange unit installed on the back side of the solar module when the temperature of the solar module increases during the day when the atmospheric temperature is high. The solar power generation efficiency can be improved by lowering the temperature of the photovoltaic module. At night when photovoltaic power generation is stopped, the photovoltaic module is cooled by cooling the photovoltaic module during the day and absorbs the high-temperature heat. The surface is cleaned to remove dust or foreign substances stuck to the surface of the solar module to improve the light transmittance and light absorption rate of solar light, thereby improving the solar power generation efficiency.

That is, in the present invention, the cooling water used to cool the solar module during the day is stored in a hot water storage tank, and hot water is sprayed onto the solar module using the solar module cleaning means at night to cleanly remove various foreign substances adhered to the surface of the solar module. Make it washable.

In particular, the present invention uses hot water to clean various foreign substances attached to the surface of the solar module, and during the initial movement of the washing water sprinkling pipe, washing water is sprayed at low pressure so that foreign substances attached to the surface of the solar module can be called. , When the second washing water sprinkling pipe is moved, the washing water is sprayed at high pressure so that foreign substances called on the surface of the solar module can be removed cleanly by water pressure, so that foreign substances removal performance can be improved, and a cleaning device such as a separate brush can be used. There is no need to provide the advantage of simply configuring the cleaning means.

In addition, the present invention provides a useful effect of saving the heating cost generated by using the hot water during the operation of the boiler by allowing the hot water obtained during cleaning of the solar module to be used as indoor hot water.

1 is a schematic overall configuration diagram of a solar module temperature reduction and cleaning system according to the present invention,
2 is an installation state diagram of a heat exchange unit installed on the rear surface of the solar module among the solar module temperature reduction and cleaning system according to the present invention;
3 is a block diagram of a configuration and operation function of a controller unit in a solar module temperature reduction and cleaning system according to the present invention.

The solar module temperature reduction and cleaning system according to the present invention performs cooling by circulating cooling water to cool the heat generated when the solar module generates power during the day, and absorbs and discharges heat during the solar module cooling process. The cooling water is stored in the hot water storage tank and then the hot water stored in the hot water storage tank at night is supplied to the solar module washing water through the washing water supply means, so that the surface of the solar module is cleaned.

In particular, the present invention is configured to adjust the supply pressure of the washing water supplied from the washing water supply means to the solar module washing means when supplying the hot water stored in the hot water storage tank as washing water. During operation, the water pressure is lowered so that the washing water sprayed on the surface of the solar module is sprayed dropwise so that dust and foreign matter adhered to the surface of the solar module can be soaked. Then, when supplying the secondary washing water, increase the washing water supply pressure to increase the pressure. It is configured to wash the surface of the photovoltaic module simply by spraying the washing water without the need for other washing equipment, by spraying the washing water of the first washing water to wash off various foreign substances that are called during the first washing water injection process. It is configured to increase the amount of power generation by improving the light absorption of sunlight while reducing the occurrence of scratches on the module surface.

In addition, the present invention is configured to provide an advantage of saving heating costs by reducing boiler operation time or fuel use by allowing the hot water in the hot water storage tank to be used as indoor hot water.

To this end, the present invention is a heat exchanger installed to reduce the temperature of the solar module by absorbing heat from the cooling water that is installed on the rear surface of the solar module to cool the heat generated from the solar module. A unit, a cooling water supply means for supplying the cooling water stored in the cooling water storage tank to the heat exchange unit, a hot water storage tank in which the cooling water which has passed through the heat exchange unit and has become high temperature due to an endothermic reaction is discharged and stored through a discharge line, and a solar module It consists of a movable guide rail installed on the upper outside of the top and bottom or left and right, and a washing water distribution pipe equipped with a plurality of washing water spray nozzles so that both ends are movable and fixed to the movable guide rails on both sides to spray the washing water while moving along the movable guide rail. Washing water supply including a washing means and a washing water supply pump installed between the hot water storage tank and the washing water sprinkling pipe to supply the hot water stored in the hot water storage tank to the washing water sprinkling pipe to wash the surface of the solar module with warm hot water. And a controller unit provided with a microcomputer for automatically/manually controlling the cooling water supply of the cooling water supply means, controlling the operation of the washing means, and controlling the supply of washing water of the washing water supplying means according to a set program; Consists of

In particular, a temperature sensing sensor for checking a cooling water temperature is provided in a discharge line through which cooling water is discharged from the heat exchange unit to a hot water storage tank, and cooling water temperature information detected by the temperature sensing sensor is transmitted to the controller unit, and the controller unit It is configured to control the supply of cooling water through the cooling water supply means by comparing the received cooling water discharge temperature data with a reference temperature set in the program, and the controller unit operates the washing water supply means and the washing means only at night when solar power generation is stopped. It is configured to perform surface cleaning of the solar module.

In addition, in the hot water storage tank, a hot water discharge pipe connected to the indoor boiler hot water supply line is installed so that hot water in the hot water storage tank can be used when hot water is used indoors, and a hot water discharge pipe connected to the hot water supply line of the boiler is installed at the end of the hot water supply line. A supply control means is provided, and the hot water supply control means detects a pressure state inside and outside the hot water discharge pipe and transmits pressure information to the controller unit, and controls the controller unit according to the pressure difference detected by the pressure sensor. It consists of a configuration including a check valve that regulates the opening and closing of the hot water discharge pipe through.

In addition, the washing water supply means is configured to adjust the water pressure of hot water supplied to the washing water distribution pipe for cleaning the solar module, and the washing water distribution pipe moves the entire surface area of the solar module once to three times. During the initial operation, the water pressure of the supplied washing water is maintained at a low pressure so that foreign substances adhered to the surface of the solar module can be soaked by drip spraying of the washing water, and supplied to the washing water sprinkling pipe after the initial operation of the washing water sprinkling pipe. It is configured to maintain the water pressure of the washing water at a high pressure to remove foreign substances from the surface of the solar module with the water pressure sprayed from the washing water spray nozzle to perform washing.

Hereinafter, a preferred embodiment of a solar module temperature reduction and cleaning system according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic overall configuration diagram of a solar module temperature reduction and cleaning system 10 according to the present invention, and FIG. 2 is a solar module 10 in the solar module temperature reduction and cleaning system 100 according to the present invention. ) Is shown in the rear view of the solar module 10 for showing the installation state of the heat exchange unit 20 installed on the rear surface of the.

1 and 2, the solar module temperature reduction and cleaning system 100 according to the present invention is mounted on the rear surface of the solar module 10 to cool the heat generated from the solar module 10. A plurality of heat exchange units 20 are installed to supply cooling water.

That is, as shown in FIG. 2, the heat exchange unit 20 is divided into a plurality of frames between the frames 15 for fixing the solar cells 12, so that communication can be made continuously through the cooling water supply pipe 22. It is installed as.

That is, when cooling water is supplied to the heat exchange unit installed in the first row at the top of the rear surface of the solar module 10, the cooling water passing through the plurality of heat exchange units installed in the first row in order (right->left) Coolant flows from the end of the row to the heat exchange unit installed in the second row below it, and the coolant that has passed through the plurality of heat exchange units installed in the second row in order (left->right) is discharged from the last installed heat exchange unit to the ground. It is configured to flow into the hot water storage tank 50 installed in and store it.

In order to cool the photovoltaic module 10, the cooling water that is finally discharged by passing through the back surface of the photovoltaic module 10 in a zigzag form passes through a plurality of heat exchange units and absorbs heat generated from the photovoltaic module 10 to achieve high temperature. The state is maintained, and the coolant discharged in the high temperature state is discharged and stored in the hot water storage tank 50 maintained in an insulating (heat insulation) state through the cooling water discharge hose 35.

In addition, a water temperature sensor 37 is installed in the cooling water discharge line 35 to finally detect the temperature of the cooling water discharged from the heat exchange unit 20, and the water temperature of the cooling water discharged by cooling the solar module is installed. It is configured to transmit temperature information to the controller unit 70 by checking in real time, and is configured to control whether or not the cooling water supply means 30 is operated according to temperature information of the cooling water discharged from the heat exchange unit 20.

That is, the temperature information of the cooling water detected by the water temperature sensor 37 is transmitted to the controller unit 70, and the controller unit 70 receiving the cooling water temperature information determines the input cooling water temperature information through a set program. If it is determined whether the temperature of the cooling water is higher than the set reference value by determining whether it is high or low, the cooling water supply means 30 is controlled to operate, and when it is determined that the temperature sensed by the water temperature sensor 37 is lower than the set reference value, the cooling water The operation of the supply means is stopped and the cooling water supplied to the solar module is blocked.

And, the cooling water supply means 30 for supplying the cooling water to the heat exchange unit 20, the cooling water storage tank 32 at a predetermined height from the ground or above the ground, and the cooling water stored in the cooling water storage tank 32 to the heat exchange unit 20. A cooling water supply pump 34 to be supplied, and a cooling water supply hose 36 for supplying the cooling water discharged from the cooling water supply pump to the heat exchange unit 20 are included.

A water level detection sensor (not shown) is installed inside the cooling water storage tank 32, so that when the cooling water level is lowered below a certain standard, the cooling water using groundwater or separate water is replenished so that the water level above a certain standard can always be maintained. Is configured to be

The operation of the cooling water supply means 30 is configured to be operated by applying power according to the control of the controller unit 70 to be described later, and the cooling water is automatically supplied to the cooling water supply means 30 and the cooling water storage tank 32. Since the technology configured to be supplemented can be easily implemented by combining known techniques by a person skilled in the art, a detailed description thereof will be omitted.

In addition, the hot water storage tank 50 in which the high-temperature cooling water discharged from the heat exchange unit 20 is stored is configured to maintain an adiabatic state, and the hot water stored therein is stored in a solar module 10 using a washing means 60 to be described later. ) It is configured to be used for surface cleaning or as hot water used indoors.

A hot water discharge pipe 52 is installed between the hot water storage tank 50 and the hot water supply line 80 supplied with hot water generated by the indoor boiler so that the hot water stored in the hot water storage tank 50 can be used indoors.

And, at the end of the hot water discharge pipe 52, a hot water supply control means 54 equipped with a pressure sensor and a check valve is installed to measure the pressure of the indoor hot water supply line 80 and the pressure inside the hot water discharge pipe 52 in real time. It is checked by the pressure sensor and transmitted to the controller unit 70, and the check valve is opened and closed according to the control of the controller unit 70 so that the hot water in the hot water storage tank 50 flows into the room and can be used.

On the other hand, there is provided a cleaning means 60 for cleaning the solar module 10 on the upper and outside of the solar module 10, the cleaning means 60 is the outer vertical or left and right of the solar module 10 A moving guide rail 62 of a certain length installed as a moving guide rail 62 and a plurality of washing water spray nozzles are fixed at both ends to move along the moving guide rail 62 to spray the washing water while moving along the moving guide rail 62 It comprises a washing water distribution pipe 64 provided with (not shown) and a step motor 66 for controlling the left and right movement of the washing water distribution pipe 64, and the rotation of the step motor 66 is controlled by a controller unit. This is done through the control of (70).

The hot water stored in the hot water storage tank 50 is supplied to the washing water distribution pipe 64 of the cleaning means 60 configured as described above, and is configured to clean the surface of the solar module 10, and the hot water storage tank ( A washing water supply line 44 and a washing water supply pump 42 supplying washing water to the washing water supply line 44 are further provided between the washing water distribution pipe 64 and the washing water supply pump. The operation of 42 is configured such that the number of rotations and the amount of rotation are controlled according to the control of the controller unit 70.

In addition, the inverter 90 into which the power produced by the solar module is received is electrically connected to the controller unit and configured so that the controller unit can automatically determine the amount of power produced and received by the solar module. It is configured to determine the level of contamination on the surface of the solar module and clean the surface of the solar module.

On the other hand, the controller unit 70 for controlling each part automatically/manually controls the cooling water supply and controls the operation of the washing means 60 and the washing water of the washing water supply means 40 according to the program stored in the built-in microcomputer. It is configured to control supply control and supply of hot water required for indoor heating.

3 is a block diagram illustrating the main configuration and detailed operation of the controller unit 70.

As shown in FIG. 3, the controller unit 70 is provided with a predetermined microcomputer 71, and the microcomputer 71 is provided with a central control unit 72 for comprehensive control of each unit.

That is, the microcomputer 71 includes a cooling water supply control unit 73 for controlling supply of cooling water to the heat exchange unit, a cooling water storage management unit 74 for managing cooling water stored in the cooling water storage tank, and discharge from the end of the heat exchange unit. The cooling water temperature detection/determining unit 75 for detecting the water temperature of the cooling water to be compared with the reference data set in the program, the washing water supply control unit 76 for controlling the supply of washing water to the washing water supply means, and the movement of the washing means The washing means movement control unit 77 for controlling the, hot water discharge management unit 78 for controlling the supply of hot water from the hot water storage tank to the indoor side, and the power produced by being connected to the inverter side to which the power generated from the solar module is introduced. It consists of a configuration provided with a power generation monitoring unit 79 for grasping.

In more detail, the cooling water supply control unit 73 controls the operation and operation time of the cooling water supply pump 34 according to a control command of a program set by the administrator, and the cooling water supply amount and cooling water according to seasons or weather conditions. Cooling water supply is controlled so that the temperature of the solar module can be quickly reduced through control of the supply time.

Of course, the cooling water supply control unit 73 is configured to automatically supply the cooling water by determining the supply amount or supply speed of the cooling water through the water temperature of the cooling water discharged from the end of the heat exchange unit, and a temperature sensor separately installed in the solar module It can be configured to automatically supply the cooling water based on the temperature information measured in.

In addition, the cooling water storage management unit 74 monitors the amount of cooling water in real time so that the cooling water stored in the cooling water storage tank is always maintained, and when the amount of cooling water falls below the reference value, the cooling water is automatically controlled through the control of the cooling water supply pump or the cooling water supply line. The cooling water is supplied to the cooling water storage tank and managed to store more than a certain amount of cooling water. The automatic replenishment of the cooling water is performed based on the information obtained from the water level sensor installed inside the cooling water storage tank.

In addition, the coolant temperature detection/determining unit 75 grasps the coolant temperature based on the signal transmitted from the coolant temperature sensor installed in the coolant discharge line, compares it with the reference value set in the program, and determines the coolant temperature according to the determined coolant temperature. The central control unit 72 sends a signal to the coolant supply control unit 73 to control the supply of coolant.

In other words, when the detected cooling water temperature is detected above the set reference temperature, the cooling water supply amount, supply speed, cooling water supply time, etc. are increased to accelerate the circulation of cooling water to reduce the temperature of the solar module in the shortest time. If the temperature falls below the temperature, the cooling water supply can be stopped or the cooling water supply rate can be reduced.

In addition, the washing water supply control unit 76 controls the supply of washing water required to the surface of the solar module, and controls the supply amount or supply pressure of the washing water.

That is, the present invention is configured to clean the solar module only at night when power generation of the solar module is stopped, and the washing water supply control unit 76 operates the washing water supply pump according to a cycle or time set by the manager and the program. Control to ensure that the washing water is supplied.

In particular, the washing water supply control unit 76 controls the washing water supply so that the washing water is supplied simultaneously with the washing means operation signal output from the washing means movement control unit 77.

That is, when a signal is transmitted to the washing means movement control unit 77 according to a period or time set by the manager and the program, the washing means movement control unit 77 sends a signal to the washing unit installed on the upper part of the solar module to distribute the washing water. The washing water supply control unit 76 outputs a washing water supply signal to the washing water supply means while the washing means operation signal is generated, and the washing water supply line and washing water are divided by operating the washing water supply pump. Make sure that the washing water is supplied through the pipe.

A step motor 66 is installed at one end of the washing water distribution pipe 64 to control the number of rotations according to a signal output from the washing means movement control unit 77, and the washing water distribution pipe 64 installed on the moving guide rail 62 It controls the movement distance or the number of movements.

The left and right movement of the washing water distribution pipe 64 is configured to control the left and right movement of the washing water distribution pipe 64 according to the signal of the limit switch by installing limit switches at both ends of the moving guide rail 62 in addition to the step motor 66 The detection signal of the limit switch is transmitted to the micom 71 to determine the reciprocating state of the washing water distribution pipe 64, and according to the reciprocating state, the washing water supply control unit 76 provides the amount of water supply and the supply pressure. It may be configured to control the washing water supply.

When the washing water supply control unit 76 initially moves (1 to 3 reciprocating left and right) of the washing means 60, which is moved according to the control of the washing means movement control unit 77, the pressure and the amount of washing water are relatively low or It is supplied in a small state so that the washing water is sprayed onto the surface of the solar module, and foreign substances adhered to the surface of the solar module can be soaked by using the washing water discharged during initial movement.

After the initial moving process of the washing water distribution pipe is completed under the control of the washing means movement control unit 77, during the second washing (4 to 6 times), the washing water supply control unit 76 increases the supply pressure of the supplied washing water. Therefore, the washing water discharged from the washing water distribution pipe is strongly sprayed on the surface of the solar module, and thus foreign substances, etc., called from the surface of the solar module can be washed off by strong water pressure. The surface of the photovoltaic module is cleaned by spraying only.

Meanwhile, the hot water discharge management unit 78 regulates the discharge of hot water stored in the hot water storage tank so that the hot water stored in the hot water storage tank can be used as indoor hot water.

That is, the pressure signal of the hot water discharge pipe and the indoor hot water supply line detected by the pressure sensor of the hot water supply control means 54 provided at the distal end of the hot water discharge pipe 52 is transmitted to the microcomputer 71 of the controller unit 70. Consisting of, when hot water is generated by the operation of the indoor boiler and hot water is supplied through the hot water supply line 80, the pressure sensor at the end of the hot water discharge pipe 52 connected to the hot water supply line 80 is inside the check valve. It detects the pressure difference from the outside and sends a signal to the microcomputer 71.

The pressure data received by the microcomputer 71 is determined through the hot water discharge management unit 78 to determine the pressure difference between the hot water supply line and the hot water discharge pipe on the boiler side, and when the pressure in the hot water supply line on the boiler drops momentarily (due to the use of hot water inside the room) Boiler-side hot water is supplied) The check valve is opened by sending a signal to the hot water supply control means so that hot water from the hot water storage tank is supplied to the hot water supply line.

In addition, when the use of hot water is stopped indoors, the movement of hot water in the hot water supply line is stopped, and the inside of the hot water supply line is maintained in a constant holding pressure, so that the pressure inside the hot water supply line and the inside of the hot water discharge pipe is the same or the pressure inside the hot water supply line is higher. When the check valve is closed, the supply of hot water discharged from the hot water storage tank to the hot water discharge pipe is stopped, and the boiler-side hot water is controlled to be blocked from flowing into the hot water discharge pipe.

In this way, the hot water discharge management unit 78 supplies hot water from the hot water storage tank to the room by controlling the opening and closing of the check valve through the pressure sensor signal of the hot water supply control means 54 provided at the end of the hot water discharge pipe 52 It is controlled to block.

In addition, the generation amount monitoring unit 79 is for monitoring the generation amount of the inverter side to which the power produced by the solar module is introduced, and when the amount of generation measured by the generation amount monitoring unit 79 falls below a reference value, the surface of the solar module Decrease the temperature of the solar module by monitoring the amount of power produced by the solar module so that the surface of the solar module can be cleaned through cooling or washing water supply by determining that contaminants have accumulated in the solar module or the temperature of the solar module is high. Make sure overwashing is done.

That is, the generation amount monitoring unit 79 detects the power generation amount data introduced into the inverter and sends a signal to the central control unit 72 when the amount of power generation differs from the power generation amount of the design value by more than a certain standard, and sends a signal to the central control unit 72 Determines that the cooling and washing timing of the solar module has arrived based on the signal transmitted from the power generation monitoring unit 79, and sends a signal to the cooling water supply control unit, the washing water supply control unit, and the washing means movement control unit to cool the solar module. Allow cleaning to occur.

The factor for determining the cooling and cleaning of the solar module is whether to cool or clean the solar module based on the water temperature of the cooling water discharged from the heat exchange unit and the power generation monitoring data transmitted from the power generation amount monitoring unit.

That is, whether or not to clean the solar module is when two factors are simultaneously satisfied, in which the coolant water temperature discharged from the heat exchange unit is higher than the reference value and the power generation data is produced below the reference value, or when either of the two factors is detected first. Whether or not the solar module is cleaned can be controlled so that the cooling and cleaning of the solar module is performed in an appropriate form through a program based on various circumstances such as geographic conditions, climate environment, and surrounding conditions in which the solar module is installed.

As described above, in the solar module temperature reduction and cleaning system according to the present invention, the cooling water supply timing and supply amount are adjusted according to the temperature of the cooling water discharged from the heat exchange unit installed on the rear surface of the solar module, and the high temperature used for cooling the solar module. The water is stored in a hot water storage tank, and the solar module is cleaned at night when solar power is stopped, so that various foreign substances sticking to the surface of the solar module can be easily removed.

In addition, the present invention allows the cooling water used to cool the photovoltaic module during the day to be stored in a hot water storage tank while maintaining a high temperature state, and then used as hot water used indoors. By reducing the operating time, it provides the advantage of reducing fuel cost and water consumption due to hot water use.

In the detailed description of the present invention, the features of the present invention have been described based on a preferred embodiment of the present invention shown in the accompanying drawings, but the technical idea of the present invention is not impaired by those of ordinary skill in the art to which the present invention belongs. It will be possible to implement various modifications within the range.

10: solar module 12: solar cell
15: fixed frame
20: heat exchange unit 22: cooling water supply pipe
30: cooling water supply means 32: cooling water making tank
34: cooling water supply pump 36: cooling water supply line
37: water temperature sensor
40: washing water supply means 42: washing water supply pump
44: washing water supply line
50: hot water storage tank 52: hot water discharge pipe
54: hot water supply control means
60: washing means 62: moving guide rail
64: washing water sprinkling pipe 66: step motor
70: controller unit 71: microcomputer
72: central control unit 73: cooling water supply control unit
74: coolant storage management unit 75: coolant temperature detection/determining unit
76: washing water supply control unit 77: washing means movement control unit
78: hot water discharge management unit 79: power generation monitoring unit
80: hot water supply line 90: inverter
100: Solar module temperature reduction and cleaning system

Claims (5)

One or more heat exchange units installed on the rear surface of the solar module to cool the heat generated from the solar module to flow cooling water therein;
Cooling water supply means for supplying the cooling water stored in the cooling water storage tank to the heat exchange unit;
A hot water storage tank in which the coolant, which has become high temperature due to an endothermic reaction while passing through the heat exchange unit, is discharged and stored through a cooling water discharge line;
A movable guide rail installed up and down or left and right on the upper outside of the photovoltaic module, and both ends are movably fixed to the movable guide rails on both sides to move along the movable guide rail to spray the washing water and wash water with a plurality of washing water spray nozzles A washing means comprising a distribution pipe and a step motor for controlling the movement of the washing water distribution pipe;
A washing water supply means installed between the hot water storage tank and the washing water sprinkling pipe so that the surface of the solar module is cleaned by supplying the hot water stored in the hot water storage tank at night under the control of the controller unit;
Including; a controller unit equipped with a microcomputer for automatically/manually controlling the cooling water supply means, controlling the operation of the washing means for washing the solar module, and controlling the washing water supply of the washing water supply means according to a set program; Solar module temperature reduction and cleaning system, characterized in that made. The method of claim 1,
The cooling water discharge line through which the cooling water is discharged from the heat exchange unit to the hot water storage tank is provided with a temperature sensing sensor for sensing the temperature of the cooling water and transmitting it to the controller,
A hot water discharge pipe is installed between the hot water storage tank and the indoor boiler hot water supply line so that hot water in the hot water storage tank can be used when using hot water indoors,
At the distal end of the hot water discharge pipe, the opening and closing of the hot water discharge pipe is regulated under the control of a pressure detection sensor that senses the pressure state inside the hot water discharge pipe and the internal pressure of the boiler hot water supply line, and a controller that receives the pressure data sensed by the pressure detection sensor. Solar module temperature reduction and cleaning system, characterized in that consisting of a configuration provided with a hot water supply control means including a check valve. The method of claim 2,
The microcomputer of the controller unit includes a cooling water supply control unit that controls supply of cooling water to the heat exchange unit, a cooling water storage management unit that manages cooling water stored in the cooling water storage tank, and a temperature detected based on temperature data of the cooling water transmitted from the temperature sensor. A cooling water temperature detection/determining unit that compares with set reference data, a washing water supply control unit that controls the supply of washing water to the washing water supply unit, a washing means movement control unit that controls the movement of the washing means, and stored in the hot water storage tank. A hot water discharge management unit that controls the hot water discharge so that hot water can be supplied to the indoor hot water, and a power generation amount monitoring unit to monitor the power production amount of the inverter side into which the power produced by the solar module is introduced. Solar module temperature reduction and cleaning system. The method of claim 3,
The washing water supply control unit is configured to adjust the strength and weakness of the water pressure of the washing water supplied to the washing water sprinkling pipe for washing the solar module,
During the initial operation (1~3 times) in which the washing water sprinkling pipe reciprocates the entire surface area of the solar module, the water pressure of the supplied washing water is maintained at a low pressure, and foreign substances adhered to the surface of the solar module are removed by drip spraying of the washing water. In the second movement of the washing water sprinkling pipe (4 to 6 times), the water pressure of the supplied washing water is maintained at high pressure to remove foreign substances from the surface of the solar module with the water pressure sprayed from the spray nozzle, so that cleaning is performed. Solar module temperature reduction and cleaning system, characterized in that consisting of a configuration to be controlled to be made. The method of claim 3,
The cooling water supply control unit automatically cools water when the temperature received from the water temperature sensing sensor provided in the cooling water discharge line is higher than a set reference temperature or when the generation amount data obtained from the generation amount monitoring unit is lower than the reference generation amount. A solar module temperature reduction and cleaning system, characterized in that configured to cool the solar module by controlling to be supplied.

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