KR102093501B1 - Floating photovoltaic system having a cooling system using the difference of water level - Google Patents

Abstract

The present invention relates to a floating solar power generation system, which can supply coolant for cooling a solar panel to a predetermined temperature and removing contaminants on a surface thereof using a water level difference of a floating solar power structure. The floating solar power generation system of the present invention comprises: a fixed pile (100) vertically fixed to the ground in water; a floating structure (200) provided to float on water, and vertically moved by being guided by the fixed pile (100); a solar panel (210) disposed in the floating structure (200) to convert sunlight into electric energy; a water channel unit (220) provided in the floating structure to spray and supply water to the solar panel (210); and a pumping unit (300) provided in the fixed pile (100), interworking with a water level difference of the floating structure (100) to be compressed to pump and supply water to the water channel unit (220).

Description

Floating photovoltaic system having a cooling system using the difference of water level

The present invention relates to a water photovoltaic power generation system, and in detail, a water phase capable of supplying cooling water capable of cooling a solar panel to a certain temperature and removing contaminants on its surface using a water level difference of the floating photovoltaic structure. It relates to a solar power system.

In recent years, many countries have provided much investment and policy support to develop new and renewable energy to replace fossil fuels to cope with climate change. In particular, photovoltaic power generation among renewable energy is recognized as a pollution-free clean energy source, and is spotlighted as a future alternative energy, and its growth is also explosive.

In the early stages of photovoltaic technology, research has been mainly focused on improving the efficiency of solar cells, and as a result, it is possible to achieve grid parity, where the cost of photovoltaic power generation is equal to the cost of fossil fuel generation. In the near future, it is producing results that can be expected. Recently, it has been expanded to research on how to install solar power and improve operating efficiency. Among them, recently, it can be said to be one of the applied technologies of photovoltaic power generation with floating photovoltaic technology. Water photovoltaic power generation is a new concept of photovoltaic power generation technology that combines existing land photovoltaic power generation technology with water floating technology.

The amount of power generated by the solar panel is greatly influenced by temperature and solar radiation, and as the amount of solar radiation increases, the amount of power generation increases while the amount of power generated decreases when the panel temperature increases. In particular, compared to terrestrial solar power, floating solar power has the advantage of securing sufficient solar radiation due to fewer surrounding obstacles, but there is a problem that power generation efficiency decreases because the temperature of the solar panel rises easily at high temperatures in midsummer. have.

In order to improve such a problem, in prior art registration patent publication No. 10-1802795, a water-type photovoltaic light having a means for cooling the photovoltaic panel by generating a water curtain on the front of the photovoltaic panel and spraying water on the back of the photovoltaic panel Generators are being proposed.

Registered Patent Publication No. 10-1802795 (Announcement date: 2017.12.28.)

The present invention is to provide a floating solar power generation system equipped with a cooling means capable of supplying cooling water capable of cooling a solar panel to a predetermined temperature and removing contaminants on the surface using a water level difference of the floating floating solar structure. Is to do.

An aqueous photovoltaic power generation system according to the present invention for achieving this object includes a fixed pile fixed vertically to an underwater ground; A floating structure provided to float on the water surface and guided by the fixed pile and movable in the vertical direction; A solar panel disposed on the floating structure to convert sunlight into electrical energy; A water channel part provided on the floating structure to supply water to the solar panel; It is provided on the fixed pile and is interlocked with the water level difference of the floating structure to be compressed and includes a pumping part for pumping and supplying water to the waterway part.

Preferably, the pumping unit is compressed by the load of the guide member, further including a guide member connected to the floating structure and a mooring line to be vertically movable on the fixed pile.

More preferably, the guide member has a ring shape that surrounds the outer circumferential surface of the fixed pile.

Preferably, the fixed pile is provided through the floating structure vertically and the pumping part is compressed by the load of the floating structure, more preferably, the pumping part is in the reaction force direction against the load of the floating structure It further includes an elastic body that provides an expansion force.

Preferably, the pumping unit has a water-tight structure and is fixed to the fixed pile, and a stretchable body portion capable of changing the volume inside by stretching in the vertical direction; A first check valve provided in the inlet provided in the elastic body part; It includes a second check valve provided in the expansion and contraction body portion is provided in the outlet to be connected to the water supply line that is to press the water to the water channel portion side.

More preferably, the elastic body portion has a bellows structure that can be stretched in the longitudinal direction of the fixed pile, and a fixed plate that fixes the lower end of the elastic body portion to the fixed pile; It is provided on the upper end of the elastic body portion and includes a movable plate that can move up and down relative to the fixed pile.

The floating photovoltaic system of the present invention is a floating photovoltaic system in which a mooring is performed by a fixed pile that is fixedly installed on the ground in the water, and is provided on the fixed pile and interlocked with the water level difference of the floating structure to compress and pump water By providing a pumping unit to be supplied, it is possible to implement an eco-friendly cooling system capable of cooling the solar panel to a constant temperature using a water level difference and removing contaminants on the surface.

1 is a front configuration of the water solar system according to an embodiment of the present invention,
2 is a plan view of an underwater solar system according to an embodiment of the present invention,
3 is a perspective configuration diagram of a floating structure assembly according to an embodiment of the present invention,
4 (a) (b) is a view for explaining an operation example of the underwater solar system according to an embodiment of the present invention,
5 is a main part configuration of a water solar system according to another embodiment of the present invention.

The specific structure or functional descriptions presented in the embodiments of the present invention are exemplified for the purpose of describing the embodiments according to the concept of the present invention, and the embodiments according to the concept of the present invention may be implemented in various forms. In addition, it should not be construed as being limited to the embodiments described herein, and should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

Meanwhile, in the present invention, terms such as first and / or second may be used to describe various components, but the components are not limited to the terms. The above terms are only for the purpose of distinguishing one component from other components, for example, without departing from the scope of rights according to the concept of the present invention, the first component may be referred to as the second component, Similarly, the second component may also be referred to as the first component.

When a component is said to be "connected" or "connected" to another component, it should be understood that other components may be directly connected or connected to the other component, but may be present in the middle. something to do. On the other hand, when a component is referred to as being “directly connected” to or “directly in contact with” another component, it should be understood that no other component exists in the middle. Other expressions for describing the relationship between the components, such as "between" and "immediately between" or "adjacent to" and "directly adjacent to", should be interpreted similarly.

The terms used in this specification are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. The term "comprises" or "haves" in this specification is intended to indicate that a feature, number, step, action, component, part, or combination thereof is implemented, one or more other features or numbers, It should be understood that the presence or addition possibilities of steps, actions, components, parts or combinations thereof are not excluded in advance.

Hereinafter, specific embodiments of the present invention will be described with reference to the accompanying drawings.

1 is a front configuration of the water solar system according to an embodiment of the present invention, Figure 2 is a plan view of the underwater solar system according to an embodiment of the present invention.

Referring to Figures 1 and 2, the water solar system of this embodiment, the fixed pile 100 is fixed vertically to the underwater ground, and guided by the fixed pile 100 is a floating structure that can be moved in the vertical direction 200, a solar panel 210 that is disposed on the floating structure 200 to convert sunlight into electrical energy, and provided on the floating structure 200 to supply water to the solar panel 210. It includes a waterway unit 220 and a pumping unit 300 for pumping and supplying water to the waterway unit 220 by being compressed in connection with the water level difference of the floating structure 200.

The fixed pile 100 is fixed to the underwater ground around the position where the floating structure 200 will be installed. In this embodiment, four fixed stakes 100 are illustrated adjacent to each corner of the floating structure 200, but depending on the structure or size of the floating structure, the number or arrangement of the fixed stakes 100 varies. Deformation is possible. The fixed pile 100 may be a circular pillar having a circular cross section, but is not limited thereto, and a square or hexagonal cross section may be a polygonal pillar. The fixed pile 100 may be used in a variety of materials, such as concrete, steel, FRP or composite materials.

Preferably, each fixed pile 100 is further connected to the mooring line 111 further includes a guide member 110 provided to be movable up and down on the fixed pile. More preferably, the guide member 110 has a circular ring shape that surrounds the outer circumferential surface of the fixed pile 100. The guide member 110 has a predetermined load and is assembled to be movable up and down on the fixed pile 100 to serve to moore the floating structure 100 at a predetermined position, and also a pumping unit 300 provided on the fixed pile 100 ) To compress and supply water to the waterway part 220.

On the other hand, although not shown, in order to reduce friction with the fixed pile 100 when the guide member 110 moves up and down, the guide member 110 has bearings for reducing friction on an assembly surface with the fixed pile 100. The same friction reducing member can be added.

Each mooring line 111 connects the corresponding guide member 110 and the floating structure 200 with a certain tension, and when the water level difference of the floating structure 200 occurs, the floating structure 200 moves up and down according to the water level and is constant. The guide member 110 having a load is connected to the mooring line 111 to follow the height of the floating structure 200 to move up and down along the fixed pile 100 to serve to moore the floating structure 200.

The floating structure 200 supports the solar panel 210 while floating on a river, a lake, or a reservoir, and is provided with buoyancy means 201 that can provide buoyancy, and such buoyancy means 201 is styrofoam or urethane. It can be provided by a tank filled with foam or air. In addition, the floating structure 200 is composed of a plurality of unit plates connected to each other rather than a single plate, and constant flow is allowed between the unit plates to maintain a stable posture even if algae or swells are generated.

The photovoltaic panel 210 includes a plurality of solar cell cells and is provided in a plate shape of a certain width, and may be formed of a plurality of unit panels. The solar panel 210 is supported to have a certain angle of inclination to the floating structure 200, and can automatically or manually adjust the inclination angle of the solar panel 210 in order to increase the efficiency of condensing sunlight according to the solar altitude. Adjustments can be added.

The waterway unit 220 is installed on the upper portion of the floating structure 200 to supply water to the solar panel 210, and is supported by a fixed beam 221 to horizontally follow the top of the solar panel 210. It includes a waterway pipe 222 is provided.

3 is a perspective structural view of a floating structure assembly according to an embodiment of the present invention.

Specifically, referring to FIG. 3, the waterway pipe 222 is formed with a plurality of drainage holes 212a in the longitudinal direction, and water flowing along the waterway pipe 222 is discharged through the drainage hole 222a to receive sunlight. As it flows down in the inclined direction of the front surface of the panel 200, the solar panel 200 is cooled and contaminants are cleaned at the front surface.

In this embodiment, the water channel part 220 illustrates the water channel piping distributed in three in correspondence with the solar panel 210 consisting of three rows, and the arrangement pattern of the water channel piping according to the number or arrangement of the solar panels It can be variously modified.

Preferably, the water channel part 220 further includes a water storage tank 223 that is provided at a certain height to temporarily store water, and the water pumped by the pumping part is temporarily stored in the water storage tank 223 and then the water channel part ( 210). A well-known opening / closing valve may be provided in a pipe line connecting the waterway part 220 and the water storage tank 223 to control water supply to the waterway part 220. On the other hand, the on-off valve may be a manual valve, or may be provided by an electric on-off valve equipped with a timer to supply water to the waterway unit 220 every predetermined time, and also to control on / off of the on-off valve. A sensor capable of detecting the temperature and the degree of contamination of the photovoltaic panel is added together with the control unit, so that the on / off control of the on-off valve can be automatically performed according to the temperature or the degree of contamination of the photovoltaic panel.

As described above, the water channel part 220 is disposed at a higher position than the top of the solar panel 210, and the water (cooling water) delivered to the water channel part 220 is naturally drained through the drain hole 222a to be inclined. As it flows down along the surface of the panel 210, the solar panel 210 is cooled and the contaminants on the surface are washed.

Referring back to FIG. 1, the pumping unit 300 has a watertight structure and is fixed to the fixed pile 100 so that the volume change inside is made by stretching in the vertical direction, and the stretching body 310 and the stretching body 310 ), The first check valve 321 provided at the inlet provided, and the second check valve provided at the outlet of the expansion and contraction body part 310 connected to the water supply line 322a which pressurizes water toward the water channel part 220 (322).

Stretch body 310 has a bellows structure that can be stretched in the vertical direction, preferably, a fixed plate 311 to fix the lower end of the stretch body 310 to the fixed stake 100, and the stretch body ( It is provided on the top of 310) includes a movable plate 312 that can move up and down relative to the fixed pile (100). The movable plate 312 is connected by a guide member 110 and a pull-up line 313 having a predetermined length, and when the guide member 110 rises in the process of rising of the floating structure 200, the pull-up line 313 is pulled. It serves to expand the stretched body portion 310 by losing.

The first check valve 321 and the second check valve 322 are provided at approximately the lower end of the expansion and contraction body portion 310, respectively, and the flow of fluid only in the direction in which water is received and exits from the expansion and contraction body portion 310, respectively. This happens. Therefore, when the elastic body portion 310 is expanded, water flows into the elastic body portion 310 only through the first check valve 321, and when the elastic body portion 310 contracts, the water is stored in the elastic body portion 310. Water is discharged through only the second check valve 322.

The first check valve 321 may include a filter unit 321a for filtering foreign substances in the inlet.

The water discharged through the second check valve 322 is stored in the water storage tank 223 through the water supply line 322a, and the water supply line 322a can be provided by a flexible hose.

The reservoir tank 223 may be provided with a vent port 223a communicating with the outside so that no negative pressure is generated therein. On the other hand, without a separate water tank, the water supply line 322a may be directly connected to the water channel part 220 to cool and clean the solar panel 210.

In this embodiment, it is illustrated that the pumping part 300 is provided only in one fixed stake 100, but it should be understood that a pumping part may be provided for each fixed stake 100.

4 (a) (b) is a view for explaining an operation example of the underwater solar system according to an embodiment of the present invention, (a) shows the state at full water level (full water level), ( b) shows the state at low water level. For reference, in the present invention, the guide member 110 is a heavy object having a certain load, and thus the guide member 110 connected to the floating structure and the mooring line is located substantially below the water surface, but in FIG. 4 for understanding The floating structure is omitted and the height of the floating structure according to the water level is represented by the height of the guide member 110.

Referring to (a) of FIG. 4, when the pumping part 300 is raised to the water level in a state where the fixed plate 311 is fixed to the fixed stake 110, the guide member 110 moves the fixed stake 110. Therefore, while moving upward, the movable plate 312 is pulled upward together with the pull-up line 313, so that the expansion and contraction of the expansion and contraction body 310 is made, and during this process, the expansion and contraction body 310 through the first check valve 321 Is filled with water.

Next, as shown in Figure 4 (b), after the water level is lowered to a certain level, the guide member 110 is pressed against the movable plate 312, the elastic body portion by the weight of the guide member 110 ( 310) is contracted, and water (cooling water) stored in the expansion and contraction body 310 in this process is discharged through the second check valve 322 and supplied to the floating structure along the water supply line 322a.

As described above, the pumping part 300 may be supplied with cooling water to the floating structure while repeating expansion and contraction while the guide member moves up and down along with the floating structure according to the water level.

In particular, the upper reservoir for pumping power is periodically changed in water level within a certain water level difference range. Therefore, in this reservoir for pumping power, water supply for cooling or washing of the solar panel can be performed very efficiently.

5 is a configuration diagram of main parts of a water photovoltaic system according to another embodiment of the present invention, and a duplicate description of the same configuration as in the previous embodiment will be omitted and the description will be mainly focused on differences.

Referring to FIG. 5, in the present embodiment, the fixed pile 100 penetrates the floating structure 400 vertically and is vertically fixed to the ground of the ground, and the floating structure 400 is fixed pile 100 according to the water level change. Accordingly, the vertical movement is performed so that the pumping unit 500 is compressed by the load of the floating structure 400 to pump water.

The pumping unit 500 has a water-tight structure and is fixed to the fixed pile 100 to be provided at an inlet provided in the elastic body 510 and the expansion and contraction body 510 in which the internal volume is changed by stretching in the vertical direction. It includes a first check valve 521, a second check valve 522 provided at the outlet of the telescopic body portion 510, and an elastic body 530 that provides elastic force for expanding the telescopic body portion 510. The second check valve 522 is connected to a water supply line 522a connected to a floating structure.

The elastic body portion 510 has a bellows structure that can be extended in the vertical direction, and a fixed plate 511 that fixes the lower end of the elastic body portion 510 to the fixed stake 100, and the upper end of the elastic body portion 510 It is provided on the fixed pile 100 includes a movable plate 512 that can be moved up and down relative to, the elastic body 530 is elastic to the fixed plate 511 and the movable plate 512 from the inside of the elastic body portion 510 Support. The elastic body 530 may be provided by a well-known coil spring, and serves to expand the elastic body portion 510 in the vertical direction when the external force (load by the floating structure) applied to the pumping portion 500 is released. .

The operation of the first check valve 521 and the second check valve 522 due to the contraction or expansion of the elastic body part 510 is the same as the previous embodiment, but in this embodiment, the contraction of the elastic body part 510 The pumping operation by the water level is lowered, the floating structure 400 is made by directly pressing the pumping part 500, and the expansion and contraction of the elastic body part 510 is made by the elastic restoring force of the elastic body 530.

In this structure, the floating solar system moves vertically along the fixed pile 100 according to the change in the water level, and in this process, the compression or expansion of the pumping unit 300 provided in the fixed pile 100 is prevented. As it is made, water is periodically supplied to the floating structure 200.

The present invention described above is not limited by the above-described embodiments and the accompanying drawings, and various substitutions, modifications and changes are possible within the scope of the present invention without departing from the technical spirit of the present invention. It will be obvious to those who have the knowledge of.

100: fixed stake 110: guide member
111: mooring line 200, 400: floating structure
210: solar panel 220: water channel
221: Fixed beam 222: Water channel piping
222a: Drainage hole 223: Reservoir tank
300, 500: pumping unit 310, 510: telescopic body
311, 511: fixed plate 312, 512: movable plate
313: Pull-up line 321, 521: 1st check valve
321a: filter 322, 522: second check valve
322a, 522a: water supply line 530: elastic body

Claims (7)

A fixed stake fixed vertically to the underwater ground;
A floating structure provided to float on the water surface and guided by the fixed pile and movable in the vertical direction;
A solar panel disposed on the floating structure to convert sunlight into electrical energy;
A water channel part provided on the floating structure to supply water to the solar panel;
It is provided on the fixed pile is interlocked with the water level difference of the floating structure is compressed to include a pumping unit for pumping water to the water supply unit,
The fixed pile is provided through the floating structure vertically, the pumping unit is a floating solar system, characterized in that compression is made by the load of the floating structure. delete delete delete The water solar system according to claim 1, wherein the pumping unit further comprises an elastic body that provides an expansion force in a reaction force direction against a load of the floating structure. According to claim 1, The pumping unit,
A telescopic body portion having a water-tight structure and fixed to the stationary pile so that the volume of the interior can be changed by expansion and contraction in the vertical direction;
A first check valve provided in the inlet provided in the elastic body part;
A water solar system including a second check valve provided at the outlet connected to a water supply line that is provided on the expansion body portion and pressurizes water toward the waterway portion. According to claim 6, The elastic body portion has a bellows structure that can be stretched in the longitudinal direction of the fixed pile, a fixed plate for fixing the lower end of the elastic body portion to the fixed pile; A water solar system including a movable plate provided on the upper end of the elastic body portion and movable up and down relative to the fixed pile.

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