WO2017071549A1

WO2017071549A1 - Floating photovoltaic frame system

Info

Publication number: WO2017071549A1
Application number: PCT/CN2016/103188
Authority: WO
Inventors: 蒋勇; 贺飞; 赵书恒; 刘洋; 尹明鹏
Original assignee: 上海箔梧能源有限公司
Priority date: 2015-10-28
Filing date: 2016-10-25
Publication date: 2017-05-04
Also published as: CN105227064B; CN105227064A

Abstract

A floating photovoltaic frame system comprising pontoons (1). Photovoltaic panel mounting components are arranged on either the top surface (2) or a certain side (4 and 5) of the pontoons (1). Also, every two pontoons (1) constitute a platform unit. The pontoons (1) of a same platform unit are connected via several connecting elements (7). Adjacent platform units are firmly connected via the connecting elements (7) or fitting structures on adjacent sides of the pontoons (1). With photovoltaic panels (9) being arranged above the water between two pontoons (1), the principle of continuous cycle water cooling between the photovoltaic panels (9) and the water surface is fully utilized to implement double continuous cycle cooling for the photovoltaic panels (9), thus increasing the output power of the photovoltaic panels (9), and extending the service life of the materials of the photovoltaic panels (9).

Description

Floating photovoltaic support system

Technical field

The present invention relates to photovoltaic power generation, and in particular to a floating photovoltaic support system.

Background technique

China is one of the few countries in the world that uses coal as its main energy source. About 100% of the production and consumption of one-time energy is coal, and coal is used in large quantities, so that 66% of the atmospheric particulate matter in Chinese cities and 22% of urban air sulphur dioxide exceed National Air Quality Secondary Standard. Coal and fossil energy use a large amount of pollutants, causing air pollution and acid rain pollution, resulting in serious deterioration of urban air quality in China. Of the 20 most polluted cities in the world listed in the 2001 World Bank Development Report, China accounted for 16. In areas with severe air pollution, the total mortality and morbidity of respiratory diseases are higher than those of lightly polluted areas. The symptoms of chronic bronchitis are aggravated by the increase in air pollution. In China's 11 largest cities, smoke and fine particles in the air make 50,000 people die each year, and 400,000 people are infected with chronic bronchitis. According to current development trends, the World Bank estimates that the economic costs of China's coal-fired pollution in 2020 will cost US$390 billion, accounting for 13% of GDP. This has already attracted the attention of the Chinese government. In the face of the current severe environmental crisis caused by coal and fossil energy consumption, it is urgent to adjust the energy structure.

According to the National Development and Reform Commission's "China PV Industry Development Research Report (2006-2007)", if there is no new detection, the current global oil is only enough for 45 years, while China is only enough for 15 years; global natural gas is only enough for 61 years. China is only enough for 30 years; global coal is only enough for 230 years, and China is only enough for 81 years; even the nuclear power uranium mine is only enough for 71 years, and China is only 50 years. As the largest developing country in China, the problem of energy shortage is even more serious. Therefore, it is urgent to find alternative energy sources. As a rich, clean and renewable new energy source, solar energy development and utilization is of great significance to alleviating the energy crisis, protecting the ecological environment and ensuring the sustainable development of the economy.

For large-scale photovoltaic power plants with a large area, the western region with long sunshine hours and large areas of cheap desertified land is undoubtedly the first choice. However, due to the fact that the western region is far from the load center, the problem of the abandoned light of photovoltaic power plants in some areas has not been well solved. However, the development of photovoltaic power plants in the eastern region, although not connected to the grid, but the densely populated and scarce land resources in the eastern region has become a constraint to the development of large-scale photovoltaic power plants. Hom. Therefore, it is necessary to find a way to develop photovoltaics without occupying useful land resources such as cultivated land and commercial land. The water photovoltaic power station model can solve the thorny problem of scarcity of land resources. The abundant river bends, lakes, fish ponds, reservoirs and other resources in many areas of China make the development of densely populated, scarce land and power load. Photovoltaic power generation is possible.

At present, foreign countries basically adopt the mode of large-scale ground-based photovoltaic power generation and rooftop photovoltaic power generation, and almost no use of surface resources for photovoltaic power generation. The only design is to build a small floating body composed of water on the surface. The floating platform of the gap, the photovoltaic panel is directly laid on the floating platform or the metal bracket is built on the floating platform for installing the photovoltaic panel. The design scheme is not good due to wind pressure resistance and wind wave resistance, and the principle of air cooling is used. The power generation efficiency of photovoltaic panels is not high, which has limited the application and development of water photovoltaic power plants. Therefore, it is necessary to invent the design of the floating photovoltaic support system, and introduce a floating platform device which is simple in processing, low in cost, energy-saving and environmentally friendly, convenient to install, easy to operate, and capable of secondary recycling, promotes the development and utilization of the water photovoltaic power station, and promotes photovoltaic Technological advances in the industry have broken through the constraints of photovoltaic power plant construction sites.

Therefore, design a floating platform device that is simple in processing, low in cost, energy-saving and environmentally friendly, easy to install, easy to operate, and capable of secondary recycling. The device can make the water photovoltaic power station resist strong wind pressure, resist strong wind and waves, and can realize photovoltaic panels. Forming a good closed space with the water surface can continuously exchange heat between the photovoltaic panel and the water surface, and improve the power output of the photovoltaic panel.

Solve the problem of wind pressure, wind and wave, corrosion resistance and photovoltaic panel cooling of water photovoltaic power station, prolong the service life of photovoltaic power station and improve power output. Promote the development and utilization of water photovoltaic power plants, promote technological advancement in the photovoltaic industry, and break through the limitations of photovoltaic power plant construction sites.

Summary of the invention

In view of the deficiencies in the prior art, it is an object of the present invention to provide a floating photovoltaic support system.

The floating photovoltaic support system according to the present invention comprises a floating box having two or more floating boxes, one end or one side of the top surface of the floating box is provided with a support member, and each two floating boxes constitute a platform unit The pontoons of the same platform unit are connected by a plurality of connecting members.

Preferably, the method further includes a photovoltaic panel mounting component, the photovoltaic panel mounting component includes a first mounting slot and a second mounting slot; and a first mounting slot is disposed on one end of the side surface or the top surface of the floating box, the floating A second mounting groove is provided on the other side of the box or the other end of the top surface.

Preferably, the two floating boxes of the same platform unit are respectively recorded as pontoon A, pontoon B, between pontoon A and pontoon B. It is connected by a plurality of connecting members, and there is a gap between the pontoon A and the pontoon B, the gap constituting a ventilation passage whose bottom surface boundary is defined by a water surface between the pontoon A and the pontoon B.

Preferably, a support member is mounted on the second mounting groove of the pontoon A, and the support member is a height adjustable component.

Preferably, one end of the photovoltaic panel is fastened to the support of the pontoon A, and the other end of the photovoltaic panel is fastened to the first mounting groove of the pontoon B.

The support member on the second mounting groove of the pontoon A and the first mounting groove of the pontoon B are also connected by a support rod, which is placed on the support rod.

Preferably, the surface of the photovoltaic panel is tilted by adjusting the height of the support and the distance between the two pontoons in the same platform unit, wherein the photovoltaic panel has an angle of inclination ranging from 5 to 40 degrees.

Preferably, the adjacent platform units are fastened together by a mating structure on the adjacent sides between the connectors or the pontoons.

Preferably, the plurality of platform units are fixedly connected and floated on the water surface by any one of a sink anchor, a ground pile, and an iron chain.

Preferably, the floating tank is a hollow float made of any one or more of plastic, polymer material, lightweight metal material, inorganic non-metal material.

Compared with the prior art, the present invention has the following beneficial effects:

1. The invention consists of two small floating boxes before and after, eliminating the floating box directly supporting the photovoltaic panel in the middle, simplifying the structure, maximizing material saving, inserting one side of the photovoltaic board into the installation slot of the floating box during installation, and One side is mounted on the support and quick and easy to install.

2. The invention provides a floating platform device for water processing, which is simple in processing, convenient to install, easy to operate, energy-saving and environmentally friendly, and capable of recycling, breaks through the limitation of the installation site of the photovoltaic power station, and promotes the development of the photovoltaic industry.

3. The photovoltaic panel of the present invention is arranged on the front and rear of the two small floating tanks to be close to the water surface, so that the front side of the photovoltaic panel can be used for air cooling, and the back surface is formed by the closed space formed by the photovoltaic panel and the floating box, and the principle of continuous circulating water cooling is double. Continuously cooling the photovoltaic panels, greatly increasing the output power of the photovoltaic panels, and extending the decay period of the photovoltaic panel materials themselves, increasing the service life.

4. The water photovoltaic power station on the device of the present invention covers the water body, can block the photosynthesis of the algae plant, inhibit the growth of the algae and reduce the water pollution; and the floating photovoltaic support system and the photovoltaic panel form a closed circulation system, reducing The water evaporates into the air, so it can enhance the water retention of the water environment.

DRAWINGS

Other features, objects, and advantages of the present invention will become apparent from the Detailed Description of Description

1 is a front view showing a unit structure of a floating platform of a floating photovoltaic power plant on which a photovoltaic panel is mounted;

Figure 2 is a plan view of the floating box;

Figure 3 is a front view of the pontoon;

Figure 4 is a left side view of the pontoon;

Figure 5 is a right side view of the pontoon;

Figure 6 is a plan view showing the unit structure of a floating platform of a floating photovoltaic power plant on which a photovoltaic panel is mounted;

Figure 7 is a plan view of a pontoon provided with a corner joint in a specific embodiment;

Figure 8 is a front elevational view showing the unit structure of a floating platform of a floating photovoltaic power plant with a photovoltaic panel mounted on a corner joint;

In the picture:

1-floating box;

2-top of the pontoon;

3-first installation slot;

One side of the 4-float box;

The other side of the 5-float box;

6-second installation slot;

7-connector;

8-support member;

9-photovoltaic panel;

11-Floating box A;

12-floating box B;

71-first connector;

72-second connector.

detailed description

The invention will now be described in detail in connection with specific embodiments. The following embodiments will be helpful to those skilled in the art. The present invention is further understood, but is not intended to limit the invention in any way. It should be noted that a number of variations and modifications may be made by those skilled in the art without departing from the inventive concept. These are all within the scope of protection of the present invention.

The floating photovoltaic support system according to the present invention comprises a floating box 1 having two or more floating boxes 1 , and one end or one side of the top surface of the floating box 1 is provided with a support member 8 and each two floating boxes 1 constitutes a platform unit, and the pontoons 1 of the same platform unit are connected by a plurality of connecting members 7.

A photovoltaic panel mounting component is further included, the photovoltaic panel mounting component includes a first mounting slot 3 and a second mounting slot 6; a first mounting slot 3 is disposed on one side of the side or top surface of the pontoon 1 A second mounting groove 6 is provided on the other side of the pontoon 1 or the other end of the top surface.

The two pontoons 1 of the same platform unit are respectively recorded as a pontoon A11 and a pontoon B12, and the pontoon A11 and the pontoon B12 are connected by a plurality of connecting members 7, and there is a gap between the pontoon A11 and the pontoon B12. The gap constitutes a ventilation passage, and a bottom boundary of the ventilation passage is defined by a water surface between the pontoon A11 and the pontoon B12.

A support member 8 is mounted on the second mounting groove 6 of the pontoon A11, and the support member 8 is a height adjustable member.

One end of the photovoltaic panel 9 is fastened to the support member 8 of the pontoon A11, and the other end of the photovoltaic panel 9 is fastened to the first mounting groove 3 of the pontoon B12.

The support member 8 on the second mounting groove 6 of the pontoon A11 and the first mounting groove 3 of the pontoon B12 are also connected by a support bar, which is placed on the support bar.

The surface of the photovoltaic panel 9 is inclined by adjusting the height of the support member 8 and the distance between the two pontoons 1 in the same platform unit, wherein the inclination angle of the photovoltaic panel 9 ranges from 5 to 40 degrees.

Adjacent platform units are fastened by a mating structure on the adjacent sides between the connectors or the pontoons 1 .

Specifically, as shown in FIGS. 7 and 8, the manner in which the corner joints are provided at the four corners of the pontoon 1 is employed, and the adjacent pontoons can be connected by screws. In addition, other matching forms such as buckles and card slots are connected to the adjacent pontoons.

Furthermore, it is also possible to directly fasten the photovoltaic panel 9 by providing a side groove on the side of the pontoon 1, or to clamp the photovoltaic panel 9 by means of a lateral card slot.

The plurality of platform units are fixedly connected and floated on the water surface by any one of a sink anchor, a ground pile, and an iron chain.

The pontoon 1 is any one of plastic, polymer material, lightweight metal material, and inorganic non-metal material. Hollow floats made of a variety of materials.

Specifically, as shown in FIG. 1, the pontoon A11 and the pontoon B12 are connected by a connecting member 7, and the support member 8 is fixed by a second mounting groove 6 on a side opposite to the pontoon A11 and the pontoon B12. A first mounting groove 3 is disposed between the top surface and the other side surface of the pontoon A11.

When the photovoltaic panel is specifically installed, the supporting rod is inserted into the first mounting groove 3 of the floating box A12, the other end of the supporting rod is mounted on the supporting member 8, and the photovoltaic panel 9 is placed on the supporting rod, the floating box A11 and A12 are fixed by the connecting member 7 to form a floating platform device. A plurality of floating platform devices are interconnected to form an entire floating platform system. The floating platform system is fixed to the shore by an iron chain, or the entire floating platform system is fixed by means of a rock anchor and a pile.

When the photovoltaic panel 9 receives solar power, the temperature of the photovoltaic panel itself rises due to the heat radiation from the sunlight and the conversion of internal energy. The size of the open circuit voltage is determined by the semiconductor's forbidden band width and Fermi level. The higher the temperature, the closer the Fermi level is to the valence band, so the higher the temperature, the smaller the open circuit voltage; the relationship between temperature and short circuit current is The higher the temperature, the higher the short-circuit current, but it should be noted that the tendency of the short-circuit current to rise is less than the above-mentioned trend of the open-circuit voltage drop; because the open-circuit voltage drops very sharply when the temperature rises, the amplitude is higher than the short-circuit current. The high amplitude is large, so the total output power of the photovoltaic panel is lowered when the temperature rises, because P = UI. Therefore, it is necessary to cool the photovoltaic panel in operation, reduce its working temperature, and increase its power output.

In the middle of the pontoon A11 and the pontoon A12 of the invention, the open area is covered by the photovoltaic panel 9. When the photovoltaic panel 9 is in operation, the water surface evaporates to absorb heat, so that the photovoltaic panel 9 can reduce the working temperature to the greatest extent and improve. Power output. In the space formed by the photovoltaic panel 9 and the complete floating platform, at least two sides are through regions, which can effectively increase the flow of the wind, reduce the heat of the photovoltaic panel 9, and increase the power output of the photovoltaic panel 9.

The photovoltaic panel 9 and the floating tank A11, the floating tank A12 and the water surface basically form a system with a substantially closed upper portion, and the water vapor evaporated on the water surface is condensed after the photovoltaic panel is condensed and returned to the original water environment, so that the water environment can maintain the maximum moisture. Reduce the evaporation of moisture.

Further, the material of the connecting member 7 includes, but is not limited to, stainless steel, fiberglass, plastic, metal, and the like.

The pontoon 1 of the present invention may be provided as a hollow lightweight hexahedron which can float on the surface of the water. The material of the pontoon 1 includes, but is not limited to, plastic, polymer material, light metal material, inorganic non-metal material. .

The specific embodiments of the present invention have been described above. It is to be understood that the invention is not limited to the specific embodiments described above, and various modifications and changes may be made by those skilled in the art without departing from the scope of the invention.

Claims

A floating photovoltaic support system, comprising: a floating box (1) having two or more floating boxes (1), and a support member is arranged on one end or one side of a top surface of the floating box (1) ( 8), and each two pontoons (1) constitute a platform unit, and the pontoons (1) of the same platform unit are connected by a plurality of connecting members (7).
The floating photovoltaic support system according to claim 1, further comprising a photovoltaic panel mounting member, the photovoltaic panel mounting member comprising a first mounting groove (3) and a second mounting groove (6); a first mounting groove (3) is disposed on one side or one end of the top surface of the box (1), and a second mounting groove (6) is disposed on the other side of the floating box (1) or the other end of the top surface .
The floating photovoltaic support system according to claim 2, wherein the two floating boxes (1) of the same platform unit are respectively recorded as a floating box A (11), a floating box B (12), and a floating box A (11). There is a gap between the pontoons B (12), which constitutes a ventilation passage, the bottom boundary of which is defined by the water surface between the pontoon A (11) and the pontoon B (12).
The floating photovoltaic support system according to claim 3, characterized in that the second mounting groove (6) of the floating box A (11) is mounted with a support member (8), and the support member (8) It is a height adjustable part.
A floating photovoltaic support system according to claim 4, characterized in that one end of the photovoltaic panel (9) is fastened to the support (8) of the pontoon A (11), the photovoltaic panel (9) The other end is fastened to the first mounting groove (3) of the pontoon B (12).
The floating photovoltaic support system according to claim 4, characterized in that the support member (8) on the second mounting groove (6) of the floating box A (11) and the first mounting groove of the floating box B (12) (3) is also connected by a support rod, which is placed on the support rod.
A floating photovoltaic support system according to claim 5, characterized in that the surface of the photovoltaic panel (9) is made by adjusting the height of the support (8) and the distance between the two pontoons (1) in the same platform unit It is inclined, wherein the photovoltaic panel (9) has an inclination angle of 5 to 40 degrees.
A floating photovoltaic support system according to claim 1 wherein adjacent platform units are securely connected by a mating structure on adjacent sides between the connectors or pontoons (1).
The floating photovoltaic support system according to claim 1, wherein the plurality of platform units are fastened and fixed by any one of a sink anchor, a ground pile, and an iron chain after being fastened and connected. On the water.
The floating photovoltaic support system according to claim 1, wherein the floating tank (1) is any one or any of a plastic material, a polymer material, a lightweight metal material, and an inorganic non-metal material. Made of empty Heart float.