KR101215402B1

KR101215402B1 - Solar power plant on water

Info

Publication number: KR101215402B1
Application number: KR1020110043192A
Authority: KR
Inventors: 김승섭
Original assignee: 김승섭
Priority date: 2011-05-06
Filing date: 2011-05-06
Publication date: 2012-12-26
Also published as: KR20120125105A

Abstract

In a water-based photovoltaic device comprising a solar module for receiving sunlight and converting it into electricity and a floating structure for installing the solar module in the water, the lower portion of the floating structure is submerged in water and the remaining upper portion floats on the water Semi-submersible type, which consists of a plurality of hollow pipes vertically formed on the surface of the water, and is composed of connecting support members for mutually supporting the plurality of pipes. It is characterized by being designed low.

Description

Solar power plant on water

The present invention relates to a water-based photovoltaic device, and more particularly, to a floating structure for water-based photovoltaic power generation that is adapted not to be damaged by climate change, such as waves, instantaneous gusts and restored to its original position.

Recently, due to the implementation of environmental regulations such as the declaration of eco-friendly policies such as GHG reduction of countries around the world, and the global oil shock and the nuclear accident in Japan, the necessity of renewable energy from the existing energy supply system that depends on fossil fuel and nuclear power is needed. The emphasis on solar power is increasing.

Photovoltaic power generation requires a certain area of installation site that can receive sunlight, and it is easy to secure an installation site due to increased regulations due to indiscriminate forest damage, except when using existing buildings and other facilities. Alternatively, water-based photovoltaic power plants are alternatively installed in reservoirs or dam surfaces. The water-based solar power plant not only saves the site purchase cost because it uses idle water, but also has an excellent cooling effect compared to the above-mentioned photovoltaic facilities.

Conventional water photovoltaic power station uses a method of connecting the ponton of HDPE (High Density Poly Ethylene) series to the steel member and mounting the solar module as shown in Figure 1 (Thompson Technologies Inc .). However, this method shows relatively stable performance when the wind is weak or the wave is weak, but the wave generated when the typhoon blows (over 50 cm) can be damaged by covering the object, and the momentary gust accompanied by the typhoon ( When wind speeds of 10m / sec or more are blown, a large area of modules are bundled and connected, and the steel member connecting the pontone to the phonton may be broken due to the stress concentration caused by the wind pressure.

If the expensive installation structure is damaged, the repair cost is equivalent to the installation cost. Therefore, the floating structure needs to be distributed to reduce the wind pressure and adapt to the instantaneous climate change.

The present invention has been made in accordance with the necessity as described above, the center of gravity is designed to be lower than the buoyancy center to maintain a stable posture to facilitate condensing below the critical wind speed, and to comply with the wind above the critical wind speed stress concentration on the floating structure By preventing the structure to provide a floating structure for mounting the solar module does not break.

In addition, by using a hollow pipe perpendicular to the water surface to provide a floating structure for mounting a solar module equipped with a defense means against the waves to minimize the water surface by reducing the contact area with water.

The configuration of the present invention for solving the above problems, in the water-based photovoltaic device comprising a photovoltaic module for receiving sunlight and converting it into electricity and a floating structure that can be installed in the water module, floating The lower part of the structure is submerged, submerged in water, and the other upper part is a submersible type. A plurality of hollow pipes are formed perpendicularly to the water surface, and are connected to each other to support the plurality of pipes. The floating structure is designed to have a lower center of gravity than the center of buoyancy and is inclined to face the sun according to the altitude of the sun.

In one embodiment of the present invention, the floating structure is attached to the fin structure parallel to the water surface at the bottom of the pipe submerged in the water, the center of gravity is one of the liquid, lead, iron, cement in the bottom of the hollow pipe or It is controlled by using a selected combination, characterized in that for adjusting the weight of a portion of the pipe so that the solar module of the floating structure inclined to one side to face the sun according to the altitude of the sun.

In another embodiment of the present invention, the floating structure is a triangular structure using three pipes or a quadrilateral structure using four to five, and the floating structures are interconnected using a connecting line and allowed to use pulleys and weights. It is characterized by determining the critical wind speed.

Floating structure of the photovoltaic device according to the present invention is designed to keep the center of gravity lower than the buoyancy center to maintain a stable posture to facilitate condensing at or below the critical wind speed, preventing the structure from being damaged by preventing stress concentration on the floating structure above the critical wind speed. As a result, stable power is obtained and maintenance costs are reduced.

In addition, by using a hollow pipe structure perpendicular to the water surface, the water surface is reduced, it is possible to provide a stable photovoltaic device with less shaking than the conventional phonton method even in high waves.

1 is a perspective view of a water-based photovoltaic device according to the prior art.
Figure 2a is a perspective view of the floating structure of the photovoltaic device according to the present invention, Figure 2b is a perspective view with a solar module attached.
Figure 3 is an embodiment in which the solar cell apparatus is installed in the water phase using the floating structure according to the present invention.
Figure 4 is an embodiment of a photovoltaic device using a floating structure according to the present invention.
5 is another embodiment of a photovoltaic device using a floating structure according to the present invention.

Hereinafter, a floating structure for a water photovoltaic device according to the present invention will be described with reference to the drawings. The illustrated drawings are enlarged or reduced in order to clarify the contents of the present invention, and the same reference numerals are used for components having the same function, and non-essential components are omitted and should not be construed as limited to the drawings.

Figure 2 is a perspective view of the floating structure of the photovoltaic device according to the present invention, the lower portion of the water surface 101 is submerged () 水式) that is submerged in water and the remaining upper portion. The floating structure 100 includes a plurality of hollow pipes 110 vertically with respect to the water surface, and the plurality of pipes are assembled with a plurality of connection support members 120 supporting each other.

The shaking of the floating body due to the fluctuation of the fluid such as wind or waves can be divided into pitch, yaw, roll. Pitch and yaw are moved in the vertical direction in the flow direction when viewed in the flow direction (xy plane) of the fluid. The roll is prevented by minimizing the repair surface.

Conventional ponton method uses a low specific gravity plastic material to obtain buoyancy, so the contact area with water is large. If the contact area with water is large, buoyancy proportional to gravity and area can be obtained, but rolling may occur due to the flow of fluid such as waves.

In the present invention, but there is buoyancy as a defense against the waves to solve this problem, to install a buoyant structure perpendicular to the water surface to reduce the contact area with water. Since the floating structure 100 uses hollow and closed hollow pipes 110, the floating structure 100 is submerged in water by the weight of the floating structure itself, but floats due to buoyancy. Waves smaller than the floating height escapes between the plurality of vertical hollow pipes 110 and are less shaken due to less stress on the waves than the conventional phonton method.

In the floating structure of the present invention, the anti-shake at or below the critical wind speed makes the center of gravity smaller than the buoyancy center, maintains equilibrium using a pulley and weight, and mounts a pin structure to prevent pitch and yaw motion.

The reason why the center of gravity is lower than the center of buoyancy is because the floating structure oscillates due to wind or waves, but because of the low center of gravity, the floating structure can be restored immediately so that it can take a stable posture. The method of adjusting the center of gravity can be further inserted in the lower part of the pipe using liquid, lead, iron, cement, or a combination thereof. In addition, in regions located in the northern hemisphere, such as Korea, the sun's altitude is low, so the incidence plane of the photovoltaic module should be tilted to face the sun. Can be adjusted by inserting or inserting.

In the present invention, a fin (130) structure is used as an example for preventing rotational movements such as pitch and yaw. Fin 130 has a small cross-sectional area in the fluid flow direction (xy plane) and a large cross-sectional area perpendicular to the fluid flow. Minimize. If the cross-sectional area of the flow direction is large, it may be resisted to move or roll.

3 shows the connection of the floating structures according to the present invention, the unit floating structures equipped with the solar module 140 are interconnected by using the connecting line 150 and the weight 170 through the pulley 160 Is connected to. Connected water photovoltaic device is fixed by the anchor 180 of the ground below the water surface so as not to flow.

Below the critical wind speed, the tension of the connecting line 150 and the gravity of the weight 170 is balanced to maintain stability. If the wind is more than the critical wind speed (for example more than 10m / sec), the wind force is added to the tension of the connecting line to break the balance with the weight, the weight is increased to allow the floating structure to shake. Therefore, it is possible to prevent the breakage of the structure by allowing the shaking to some extent to prevent the stress concentration by dispersing the wind pressure in the instantaneous gust situation. When the instantaneous gust disappears, the floating structure itself is designed to have a low center of gravity, so it is restored to a stable posture and descends by the weight of the weight to maintain a stable posture by achieving tension and equilibrium. The allowable critical wind speed can be adjusted by varying the weight of the weight. The same principle applies to waves above floating height (for example, crests above 50 cm).

4 and 5 is a floating photovoltaic device showing another embodiment of the present invention, in FIG. 2 is a floating structure of a quadrilateral structure using four hollow pipes, Figure 4 is a triangular structure using three hollow pipes 5 shows a floating structure of FIG. 5, but shows a water-based photovoltaic device using a floating structure modified in a circular shape using four hollow pipes, and the present invention can be modified in various forms.

100: floating structure 101: water surface
110: hollow pipe 120: connection support member
130: fin structure 140: solar module
150: connecting line 160: pulley
170: weight 180: anchor

Claims

In the water-based photovoltaic device comprising a photovoltaic module for receiving sunlight and converting it into electricity, and a floating structure to install the photovoltaic module in the water phase,
The floating structure is a photovoltaic device floating structure, characterized in that the fin structure is mounted parallel to the water surface at the bottom submerged in water to prevent shaking.

The method of claim 1,
The floating structure is a semi-submersible type in which the lower part is submerged in water and the other upper part is floated on water. Consists of a plurality of connecting support members,
The floating structure is a photovoltaic device floating structure, characterized in that the center of gravity is designed lower than the buoyancy center

The method of claim 1,
The floating structures are connected to each other using a connecting line and the suspended wind power structure, characterized in that for determining the critical wind speed allowed using a pulley and weight.

The method of claim 2,
The solar module of the floating structure to adjust the weight of some of the plurality of pipes to be inclined to one side to face the sun according to the altitude of the sun,
The weight of the pipe is a floating structure of a photovoltaic device, characterized in that the lower part of the hollow pipe, liquid, lead, iron, cement or put into a selected combination is adjusted.

delete