Floating photovoltaic platform

Abstract

The invention provides a floating type photovoltaic platform which comprises a photovoltaic supporting table, a flexible film and a plurality of floaters. The photovoltaic supporting table comprises a buoy floating on the water surface and a deck arranged above the buoy, the buoy is used for providing buoyancy, and the deck is used for installing a photovoltaic assembly. The floaters are fixed to the periphery of the photovoltaic supporting table through mooring ropes connected with the water bottom, and the floaters and the photovoltaic supporting table are arranged at intervals. The flexible film is connected between the deck and the floater and arranged around the photovoltaic supporting table in a surrounding mode. Wave energy can be buffered in advance through the flexible film, meanwhile, water flow is guided to achieve cooling of the photovoltaic module, and the photovoltaic power generation efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of offshore photovoltaic power generation, and in particular to a floating photovoltaic platform. Background Art

[0002] As the global demand for renewable energy grows, offshore photovoltaic power generation has gradually become an important way to solve energy problems. However, offshore photovoltaic platforms face many challenges, especially the impact of ocean waves and disturbances from wind and waves. If the design of offshore photovoltaic platforms lacks effective wave reduction devices, the platform will be unstable in high sea conditions, which will in turn affect the power generation efficiency of photovoltaic modules and the structural stability of the platform. At the same time, due to the strong impact of waves on the platform, the supporting structure of the photovoltaic platform usually needs to be designed to be very strong, resulting in high construction and maintenance costs. In addition, the power generation efficiency of photovoltaic modules working in high temperature environments will drop significantly.

[0003] At present, the existing wave-cutting designs of photovoltaic platforms mainly include high air gap platform design (such as solar duck, etc.) and low air gap design (such as ocean sun, etc.). The high air gap platform design adopts the method of increasing the platform depth to avoid the impact of waves on the platform, but this will greatly increase the cost and reduce the gain effect of water cooling on photovoltaic panel power generation. The low air gap design is in direct contact with the wave surface, and the thin film structure has a very obvious displacement, and at the same time faces the problem of water accumulation on the upper waves.

[0004] How to solve these problems through innovative design and reduce the motion response caused by waves in a low-cost way while improving the efficiency of photovoltaic power generation has become a technical problem that needs to be solved urgently. Summary of the invention

[0005] The purpose of the present invention is to provide a floating photovoltaic platform to solve the above problems. The flexible membrane can buffer the wave energy in advance, and at the same time guide the water flow to cool the photovoltaic components and improve the efficiency of photovoltaic power generation.

[0006] The present invention proposes a floating photovoltaic platform, comprising a photovoltaic support platform, a flexible membrane and a plurality of floats;

[0007] The photovoltaic support platform includes a buoy floating on the water surface and a deck arranged above the buoy, the buoy is used to provide buoyancy, and the deck is used to install photovoltaic modules;

[0008] The float is fixed around the photovoltaic support platform through a mooring rope connected to the bottom of the water, and is spaced apart from the photovoltaic support platform;

[0009] The flexible membrane is connected between the deck and the float, and is arranged around the photovoltaic support platform.

[0010] In one embodiment, the inner side of the flexible membrane is fixedly connected to the edge of the deck, the outer side is connected to each float, and the side wall is provided with a plurality of water flow holes;

[0011] The inner side refers to a side close to the photovoltaic support platform, and the outer side refers to a side away from the photovoltaic support platform.

[0012] In one embodiment, the flexible membrane is a one-piece structure with an opening in the middle, and a plurality of strip-shaped water flow holes are provided on the side wall of the flexible membrane.

[0013] In one embodiment, the flexible membrane is composed of a plurality of trapezoidal membranes arranged at intervals, the inner edges of the trapezoidal membranes are respectively fixedly connected to the decks, the outer edges of the trapezoidal membranes are connected to each other, and the water flow hole is located between two adjacent trapezoidal membranes.

[0014] In one embodiment, the photovoltaic support platform further includes a plurality of support rods, the buoy is horizontally placed and floats on the water, the deck is horizontally arranged, the support rods are vertically arranged between the buoy and the deck, and the length of the support rods is determined according to a preset depth of the photovoltaic support platform.

[0015] In one embodiment, the float is flush with the height of the buoy, and the inner side of the flexible membrane is higher than the outer side.

[0016] In one embodiment, the deck is square, the photovoltaic support platform includes four pontoons, and the four pontoons are connected end to end to form a square area, and the area of ​​the square enclosed by the pontoons is smaller than the area of ​​the deck.

[0017] In one embodiment, there are four floats, which are respectively arranged at the four corners of the deck.

[0018] In one embodiment, the deck is formed by crisscrossing hollow trusses.

[0019] In one embodiment, the flexible film is made of high-density polyethylene.

[0020] Compared with the prior art, the floating photovoltaic platform of the present invention has the following beneficial effects:

[0021] 1) The present invention introduces a flexible membrane design. Through the interaction between the flexible membrane and the waves, the waves first contact the flexible membrane. The structure and design of the flexible membrane effectively reduce the kinetic energy of the waves, so that the wave energy transmitted to the photovoltaic support platform is greatly reduced, the wave energy is buffered in advance, and the cooling of the photovoltaic components is achieved by guiding the water flow.

[0022] 2) The present invention can effectively reduce wave power, thereby simplifying the design of the photovoltaic support structure, reducing material usage and construction difficulty, and improving power generation efficiency.

[0023] 3) The present invention guides the water flow to make the waves climb on the flexible membrane, guides part of the water flow to the top of the photovoltaic module, takes away the heat generated by the photovoltaic module through the high heat capacity of water, and reduces the operating temperature of the photovoltaic module through the water cooling mechanism, thereby improving the efficiency of photovoltaic power generation.

[0024] 4) The present invention can change the way waves act, reduce the impact of waves on the rotation of the photovoltaic platform, reduce the rotation amplitude of the photovoltaic platform, and improve the overall stability and safety of the platform. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic structural diagram of a floating photovoltaic platform according to an embodiment of the present invention;

[0026] Figure 2 A side view of a floating photovoltaic platform according to an embodiment of the present invention;

[0027] Figure 3 A top view of a floating photovoltaic platform according to an embodiment of the present invention;

[0028] Figure 4 This is a schematic diagram of the structure of a flexible membrane in a floating photovoltaic platform according to an embodiment of the present invention;

[0029] Figure 5 This is a schematic structural diagram of a photovoltaic support platform in a floating photovoltaic platform according to an embodiment of the present invention;

[0030] Figure 6a This is a schematic diagram of the principle of a floating photovoltaic platform buffering and diverting waves according to an embodiment of the present invention;

[0031] Figure 6b Schematic diagram of the principle of reducing the wave rotation effect of a floating photovoltaic platform according to an embodiment of the present invention.

[0032] Reference numerals

[0033] 1. float, 2. flexible membrane, 21. trapezoidal membrane, 22. water flow through hole, 3. photovoltaic support platform, 31. deck, 32. support rod, 33. buoy. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the present invention more understandable, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments of the specification. It should be noted that many specific details are set forth in the following description to facilitate a full understanding of the present invention, but the present invention can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0035] Secondly, the present invention is described in detail with reference to schematic diagrams. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure may not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0036] Secondly, "one embodiment" or "an embodiment" in this application refers to a specific feature, structure or characteristic that can be included in at least one implementation of the present invention. The "in one embodiment" and "an embodiment" that appear in different places in this specification do not all refer to the same embodiment, nor are they separate or selective embodiments that are mutually exclusive with other embodiments. The terms "including" and "comprising" indicate the presence of the claimed features, but do not exclude the presence of one or more other features. The term "and / or" used in this application includes any and all combinations of one or more of the relevant listed items.

[0037] The present invention proposes a floating photovoltaic platform, Figure 1 , Figure 2 , Figure 3 , including a photovoltaic support platform 3, a flexible membrane 2 and a plurality of floats 1. Figure 5 As shown, the photovoltaic support platform 3 includes a buoy 33 floating on the water surface, a deck 31 arranged above the buoy, and a plurality of support rods 12. The buoy 31 is placed horizontally and floats on the water surface to provide buoyancy. The deck 31 is arranged horizontally for installing photovoltaic components, such as photovoltaic panels. The support rod 12 is arranged vertically between the buoy 33 and the deck 31, and the length of the support rod 32 is determined according to the preset depth of the photovoltaic support platform 3, so that the photovoltaic support platform 3 is guaranteed to have a certain depth. It should be noted that the waterline of the entire floating photovoltaic platform should be located near the buoy 13. The float 1 is fixed to the surroundings of the photovoltaic support platform 3 by a mooring rope connected to the bottom of the water, and the limit of the float 1 is achieved by the mooring rope. The float 1 is arranged at a certain distance from the photovoltaic support platform 3. The flexible membrane 2 is fixedly connected (e.g., bound) between the deck 31 and the float 1, and surrounds and covers the surroundings of the photovoltaic support platform 3. The flexible membrane 2 is allowed to interact with the waves in advance, blocking the wave energy in a buffering manner, reducing the kinetic energy transmitted to the photovoltaic support platform 3, and avoiding excessive impact on the photovoltaic support platform 3. At the same time, part of the water flow can be introduced into the deck 31, covering the photovoltaic components to achieve cooling. In addition, thanks to the wave energy weakened by the flexible membrane, the supporting structure of the photovoltaic platform no longer needs to be overly strong, significantly reducing the use of materials and construction difficulty.

[0038] The inner side of the flexible membrane 2 of an embodiment of the present invention is fixedly connected to the edge of the deck 31, and the outer side is connected to each float 1, and the side wall is provided with a plurality of water flow holes 22. The design of the water flow holes 22 can allow part of the water to pass through the flexible membrane 2 and directly reach the rear when encountering short-term large waves, thereby avoiding damage to the flexible membrane 2 caused by excessive impact and deterioration of the hydrodynamic performance caused by the flexible membrane. Among them, the inner side refers to the side close to the photovoltaic support platform 3, and the outer side refers to the side away from the photovoltaic support platform 3. The height of the float 1 is basically flush with that of the pontoon 33, and the inner side of the flexible membrane 2 is higher than the outer side.

[0039] The flexible membrane 2 of the first embodiment of the present invention is a one-piece structure with an opening in the middle, and a plurality of strip-shaped water flow holes 22 are provided on the side wall of the flexible membrane 2 .

[0040] The flexible membrane 2 of the second embodiment of the present invention is composed of a plurality of trapezoidal membranes 21 arranged at intervals. Figure 4 The inner edges of the trapezoidal membranes 22 are fixedly connected to the deck 31 , respectively, the outer edges of the trapezoidal membranes 22 are connected to each other, and the water flow hole 22 is located between two adjacent trapezoidal membranes 21 .

[0041] The deck 31 of one embodiment of the present invention is square, and the photovoltaic support platform 3 includes four buoys 33, which are connected end to end to form a square area, and the square area surrounded by the buoys is smaller than the area of ​​the deck 31. Such a structural design is more stable, not only can it carry photovoltaic components, but also can effectively disperse the wind and wave loads at sea, and provide excellent buoyancy and wind and wave resistance. The buoy 33 is cylindrical and wrapped inside by a flexible membrane. Since the flexible membrane weakens the wave energy, the buoy 33 can appropriately reduce the strength requirements, for example, high-density polyethylene (HDPE), composite foam materials, polyurethane foam and other materials can be selected. The support rods 32 are respectively arranged between the four corners of the deck and the ends of the buoys, between the midpoints of each side of the deck and the midpoints of the corresponding lower buoys, and between the midpoints of the relatively arranged buoys. Of course, for the stability of the photovoltaic support platform, the support rods 32 can also be installed in different positions as needed. The shape of the deck 31 and the enclosed shape of the buoys 33 can also be selected from other shapes other than square.

[0042] According to one embodiment of the present invention, there are four floaters 1 , which are respectively arranged at the four corners of the deck 31 .

[0043] The deck 31 of one embodiment of the present invention is composed of crisscross hollow trusses.

[0044] The material of the flexible membrane 2 in one embodiment of the present invention is high-density polyethylene. Of course, other corrosion-resistant materials with certain strength and toughness can also be selected.

[0045] like Figure 6aAs shown, when a large wave hits the photovoltaic platform, the wave will first contact the flexible membrane, and the seawater will climb up along the surface of the membrane to generate potential energy, thereby gradually reducing its flow kinetic energy, and finally reach the deck at a slow speed. The direct contact between water and the photovoltaic panel can take away a large amount of heat, increasing the water cooling benefit. At the same time, since the waves have interacted with the flexible membrane and the float, the waves reaching the photovoltaic platform will be significantly smaller than the original waves. Secondly, when the original waves directly contact the photovoltaic platform, a large rotational motion will be generated. In the design of a flexible membrane with flexible vias 22, as shown in FIG. Figure 6b As shown, part of the waves pass through the flexible membrane 2 through the water flow hole 22 and directly reach the rear, so that the waves mainly generate lateral thrust when acting on the flexible membrane, reducing the rotation impact. The lateral thrust load is located in the horizontal plane and is borne by the mooring system, so the rotation amplitude of the platform can be greatly reduced.

[0046] It should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "inside" and "outside" are all based on the directions or positional relationships shown in the drawings. Such expressions are only intended to make the description of the present invention simpler and more convenient, and do not indicate or imply that the referred parts must have a specific direction or be constructed and operated in a specific direction.

[0047] In addition, in the present application, unless otherwise clearly stipulated and limited, "connection", "setting" and other similar terms should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or the internal connection of two elements. Technical personnel in the field can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0048] The present invention has the following beneficial effects:

[0049] 1) The present invention introduces a flexible membrane design. Through the interaction between the flexible membrane and the waves, the waves first contact the flexible membrane. The structure and design of the flexible membrane effectively reduce the kinetic energy of the waves, so that the wave energy transmitted to the photovoltaic support platform is greatly reduced, the wave energy is buffered in advance, and the cooling of the photovoltaic components is achieved by guiding the water flow.

[0050] 2) The present invention can effectively reduce wave power, thereby simplifying the design of the photovoltaic support structure, reducing material usage and construction difficulty, and improving power generation efficiency.

[0051] 3) The present invention guides the water flow to make the waves climb on the flexible membrane, guides part of the water flow to the top of the photovoltaic module, takes away the heat generated by the photovoltaic module through the high heat capacity of water, and reduces the operating temperature of the photovoltaic module through the water cooling mechanism, thereby improving the efficiency of photovoltaic power generation.

[0052] 4) The present invention can change the way waves act, reduce the impact of waves on the rotation of the photovoltaic platform, reduce the rotation amplitude of the photovoltaic platform, and improve the overall stability and safety of the platform.

[0053] Although the above methods are illustrated and described as a series of actions for simplicity of explanation, it should be understood and appreciated that these methods are not limited by the order of the actions, because according to one or more embodiments, some actions may occur in a different order and / or concurrently with other actions from those illustrated and described herein or not illustrated and described herein but understandable to those skilled in the art.

[0054] The construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., size, structure, shape and proportion, as well as parameter values, mounting arrangements, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and is not only structurally equivalent but also equivalent structure. Without departing from the spirit and essence of the present invention, a person skilled in the art can make various corresponding modifications and changes according to the present invention, but these corresponding modifications and changes should all fall within the scope of protection of the present invention.

Claims

1. A floating photovoltaic platform, characterized in that: It includes a photovoltaic support platform, a flexible membrane and a number of floats; The photovoltaic support platform includes a buoy floating on the water surface and a deck arranged above the buoy, the buoy is used to provide buoyancy, and the deck is used to install photovoltaic modules; The float is fixed around the photovoltaic support platform through a mooring rope connected to the bottom of the water, and is spaced apart from the photovoltaic support platform; The flexible membrane is connected between the deck and the float, and is arranged around the photovoltaic support platform.

2. The floating photovoltaic platform according to claim 1, characterized in that: The inner side of the flexible membrane is fixedly connected to the edge of the deck, the outer side is connected to each float, and the side wall is provided with a plurality of water flow holes; The inner side refers to a side close to the photovoltaic support platform, and the outer side refers to a side away from the photovoltaic support platform.

3. The floating photovoltaic platform according to claim 2, characterized in that: The flexible membrane is a one-piece structure with an opening in the middle, and a plurality of strip-shaped water flow holes are provided on the side wall of the flexible membrane.

4. The floating photovoltaic platform according to claim 2, characterized in that: The flexible membrane is composed of a plurality of trapezoidal membranes arranged at intervals, the inner edges of the trapezoidal membranes are respectively fixedly connected to the decks, the outer edges of the trapezoidal membranes are connected to each other, and the water flow hole is located between two adjacent trapezoidal membranes.

5. The floating photovoltaic platform according to claim 2, characterized in that: The photovoltaic support platform also includes a plurality of support rods. The buoy is placed horizontally and floats on the water surface. The deck is arranged horizontally. The support rods are arranged vertically between the buoy and the deck. The length of the support rods is determined according to the preset depth of the photovoltaic support platform.

6. The floating photovoltaic platform according to claim 5, characterized in that: The float is flush with the height of the buoy, and the inner side of the flexible membrane is higher than the outer side.

7. The floating photovoltaic platform according to claim 5, characterized in that: The deck is square, and the photovoltaic support platform includes four pontoons, which are connected end to end to form a square area, and the area of ​​the square surrounded by the pontoons is smaller than the area of ​​the deck.

8. The floating photovoltaic platform according to claim 7, characterized in that: There are four floats, which are respectively arranged at the four corners of the deck.

9. The floating photovoltaic platform according to claim 1, characterized in that: The deck is composed of crisscross hollow trusses.

10. The floating photovoltaic platform according to claim 1, characterized in that: The material of the flexible film is high-density polyethylene.

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