A marine photovoltaic system

Abstract

This invention discloses a marine photovoltaic system, comprising a float and a buoy assembly. Photovoltaic panels are mounted on the float, and the buoy assembly includes two buoys located on opposite sides of the float. Elastic cables are connected to the buoys, with anchors connected to the bottom ends of the elastic cables. A plurality of mooring line groups are connected between the two buoys, distributed horizontally and passing through the float. This structure can withstand harsh sea conditions, support marine photovoltaic systems in deep-sea areas, and improve the utilization rate of marine space.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic system technology, and more specifically to a marine photovoltaic system. Background Technology

[0002] Due to the scarcity of land resources, some regions have planned large-scale offshore energy zones, promoting the research and development of offshore photovoltaic (PV) systems. Based on the characteristics of these planned sea areas, most are located in water depths greater than 20 meters, making fixed PV support structures unsuitable for offshore PV farm development. In recent years, numerous technical solutions for floating PV support systems have been proposed both domestically and internationally, including rigid structures, flexible structures, and rigid-flexible composite structures. However, due to technical or cost issues, none have achieved large-scale commercialization.

[0003] For example, existing thin-film floating photovoltaic systems use HDPE engineering plastic to form a float around the perimeter, with a thin-film structure in the middle floating on the water, and photovoltaic panels mounted on the film. The disadvantages are that the engineering plastic float's structural strength cannot meet the requirements of deep-sea conditions, and its basin-shaped structure means the film is in contact with the water, making internal drainage impossible in the event of overtopping.

[0004] Currently, there are also semi-submersible photovoltaic support systems, but their disadvantages include large steel consumption, poor stability, poor wind resistance, and low reliability of connection points. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a marine floating system. This structure can withstand harsh sea conditions, support marine photovoltaic systems in the deep sea, and improve the utilization rate of marine space.

[0006] A marine photovoltaic system includes a floating body and a buoy assembly. Photovoltaic panels are installed on the floating body. The buoy assembly includes two buoys located on opposite sides of the floating body. Elastic cables are connected to the buoys, and anchors are connected to the bottom ends of the elastic cables. A plurality of mooring line groups are connected between the two buoys. The mooring line groups are distributed horizontally and pass through the floating body.

[0007] Preferably, the mooring line group includes two main mooring lines, which are respectively connected to two buoys. Multiple mooring branch line groups are connected between the two main mooring lines. The multiple mooring branch line groups are distributed in a horizontal direction. Each mooring branch line group has two longitudinally distributed mooring branch lines that pass through the buoy.

[0008] Preferably, the buoy includes a top layer, a middle layer, an air cushion layer, and a counterweight layer, which are distributed sequentially from top to bottom, and the two anchor branches in the anchor branch group pass through the middle layer and the counterweight layer respectively.

[0009] Preferably, the top layer includes a rubber layer, a wear-resistant layer, and a film layer, with the wear-resistant layer laid on top of the rubber layer, the film layer laid on top of the wear-resistant layer, and the photovoltaic panel mounted on the film layer.

[0010] Preferably, the air cushion layer has several air chambers, and the float is equipped with an air pump, which is connected to the several air chambers through an air pump pipe.

[0011] Preferably, the float body is provided with a plurality of vertical traction ropes.

[0012] Preferably, the float assembly is provided in two parts, with the two floats in one float assembly located on the front and rear sides of the float body respectively, and the two floats in the other float assembly located on the left and right sides of the float body respectively.

[0013] Preferably, the system also includes a buoyancy ball, which is filled with a low-density gas, has a photovoltaic panel installed on its outer wall, and is connected to the buoyancy ball by multiple traction lines.

[0014] The beneficial effects of this invention are as follows: This technical solution employs a floating body with a counterweight layer and an air cushion layer structure for installing photovoltaic panels. An elastic cable is configured between the buoy and the anchor to resist the fluctuations in sea surface height caused by waves and tidal range. The inclined setting of the elastic cable can resist wave and current loads, ensuring the floating body moves within a fixed range. During the tilting motion of the floating body, the wind-exposed area increases significantly, and the counterweight reduces the anchoring tension caused by wind loads. The floating body has an intermediate layer and a counterweight layer, with two anchoring branches passing through the intermediate layer and the counterweight layer respectively. The external tensile loads generated by wind, waves, and currents are borne by the anchoring branch group, preventing excessive tension on the floating body. This structure of the floating body, combined with the structure of the anchoring branch group and the elastic cable, results in excellent overall structural performance, strong resistance to wave forces, and a wider range of adaptable sea areas. Attached Figure Description

[0015] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0016] Figure 1 This is the front view of the present invention;

[0017] Figure 2 This is a front view of the invention without the buoyant balloon installed.

[0018] Figure 3 for Figure 2 A magnified structural diagram of position A in the middle;

[0019] Figure 4 This is a top view of the float assembly and mooring line assembly in this invention.

[0020] In the attached diagram, 1-buoy, 2-buoy ball, 3-elastic cable, 4-anchor, 5-anchoring line assembly, 6-air pump, 7-buoy ball, 8-traction line, 9-vertical traction rope.

[0021] 101 - Top layer, 102 - Middle layer, 103 - Air cushion layer, 104 - Counterweight layer

[0022] 501 - Main anchorage line, 502 - Branch anchorage line. Detailed Implementation

[0023] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solution of the present invention and are therefore intended to limit the scope of protection of the present invention.

[0024] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application should have the ordinary meaning as understood by those skilled in the art to which this invention pertains.

[0025] Example

[0026] like Figures 1-4 As shown, this embodiment provides a marine photovoltaic system, including a float 1 and a buoy assembly. Photovoltaic panels are installed on the float 1. The buoy assembly includes two buoys 2, which are located on opposite sides of the float 1. Elastic cables 3 are connected to the buoys 2, and anchors 4 are connected to the bottom of the elastic cables 3. Several anchor line groups 5 are connected between the two buoys 2. The anchor line groups 5 are distributed horizontally and pass through the float 1.

[0027] In this embodiment, the mooring line group 5 includes two main mooring lines 501, which are respectively connected to two buoys 2. Multiple mooring branch line groups are connected between the two main mooring lines 501. The multiple mooring branch line groups are distributed in the horizontal direction. Each mooring branch line group has two longitudinally distributed mooring branch lines 502, which pass through the buoy 1.

[0028] In this embodiment, two float assemblies are provided. The two floats 2 in one float assembly are located on the front and rear sides of the float body 1, respectively, and the two floats 2 in the other float assembly are located on the left and right sides of the float body 1, respectively.

[0029] In this embodiment, the float 1 includes a top layer 101, a middle layer 102, an air cushion layer 103, and a counterweight layer 104. The top layer 101, the middle layer 102, the air cushion layer 103, and the counterweight layer 104 are distributed sequentially from top to bottom. The two anchoring branches 502 in the anchoring branch group pass through the middle layer 102 and the counterweight layer 104 respectively.

[0030] In this embodiment, multiple mooring line groups 5 are evenly distributed in the horizontal direction, and multiple mooring branch line groups within the mooring line group 5 are evenly distributed in the horizontal direction.

[0031] In this embodiment, a float 1 with a counterweight layer 104 and an air cushion layer 103 is used to install photovoltaic panels. An elastic cable 3 is connected between the buoy 2 and the anchor 4 to resist the rise and fall of the sea surface caused by waves and tidal range. The elastic cable 3 is inclined to resist wave and current loads and ensure that the float 1 moves within a fixed range. During the tilting movement of the float 1, the wind-exposed area increases significantly. The counterweight of the float 1 reduces the anchoring tension caused by wind loads. The float 1 has an intermediate layer 102 and a counterweight layer 104. Two anchoring branches 502 in the anchoring branch line group pass through the intermediate layer 102 and the counterweight layer 104 respectively. The external tensile loads generated by wind, waves and currents are borne by the anchoring branch line group 5, preventing the float 1 from being subjected to excessive tension. In this way, the structure of the float 1, combined with the structure of the anchoring branch line group 5 and the elastic cable 3, can achieve excellent overall stress performance, strong resistance to wave forces, and adaptability to a wider range of sea areas.

[0032] In this embodiment, the top layer 101 includes a rubber layer, a wear-resistant layer, and a film layer. The wear-resistant layer is laid on top of the rubber layer, the film layer is laid on top of the wear-resistant layer, and the photovoltaic panel is installed on the film layer.

[0033] In this embodiment, the intermediate layer 102 is a solid layer, and the intermediate layer 102 and the counterweight layer 104 can be made of non-metallic materials that are pressure-resistant, wear-resistant, and corrosion-resistant.

[0034] In this embodiment, the air cushion layer 103 has several air chambers. An air pump 6 is mounted on the float 1, and the air pump 6 is connected to the air chambers via air inflation pipes. In this embodiment, the material of the air cushion layer 103 can be flexible or a flexible elastic structure. In this embodiment, the air cushion layer 103 is surrounded by abrasion-resistant and scratch-resistant material. The air pump 6 is independently connected to each air chamber; leakage in one air chamber does not affect the use of other air chambers. The power source for the air pump 6 is photovoltaic.

[0035] In this embodiment, the float 1 is provided with several vertical traction ropes 9. The vertical traction ropes 9 are connected to the top layer 101, the middle layer 102, the air cushion layer 103 and the counterweight layer 104 inside the float 1, which further improves the overall rigidity.

[0036] This embodiment also includes a buoy 7, which is filled with low-density gas. Photovoltaic panels are installed on the outer wall of the buoy 7, and the buoy 7 is connected to the float 2 via multiple traction lines 8. In this embodiment, based on a surface photovoltaic system, a buoy 7 is placed in the air, and photovoltaic panels are installed on its surface to improve solar efficiency. Specifically, photovoltaic panels are laid on the side and top walls of the buoy 7. The height of the buoy 7 is designed to minimize shading of the surface float 1, thereby improving power generation efficiency. In this embodiment, the main power generation cable is located inside the traction lines 8. In this embodiment, the buoy 7 can be elliptical, flat, or airfoil-shaped to reduce wind load.

[0037] This technical solution features a simple structure, clear stress distribution, and high reliability. The materials are simple, easy to manufacture, and have low overall cost, facilitating mass production. This technical solution also exhibits strong resistance to wind and waves, is suitable for marine environments, and can significantly improve the utilization rate of sea surface area, thereby enhancing overall power generation capacity.

[0038] In this embodiment, anchor 4 can be a gravity anchor, holding anchor, or pile anchor, etc.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A marine photovoltaic system, characterized in that, The system includes a float (1) and a float assembly. A photovoltaic panel is installed on the float (1). The float assembly includes two floats (2). The two floats (2) are located on both sides of the float (1). An elastic cable (3) is connected to the float (2). An anchor (4) is connected to the bottom end of the elastic cable (3). Several anchor line groups (5) are connected between the two floats (2). The several anchor line groups (5) are distributed in the horizontal direction and pass through the float (1). The mooring line group (5) includes two main mooring lines (501), which are respectively connected to two buoys (2). Multiple mooring branch line groups are connected between the two main mooring lines (501). The multiple mooring branch line groups are distributed in the horizontal direction. Each mooring branch line group has two longitudinally distributed mooring branch lines (502), which pass through the buoy (1). The floating body (1) includes a top layer (101), a middle layer (102), an air cushion layer (103), and a counterweight layer (104). The top layer (101), the middle layer (102), the air cushion layer (103), and the counterweight layer (104) are distributed from top to bottom. The two anchor branches (502) in the anchor branch group pass through the middle layer (102) and the counterweight layer (104) respectively. It also includes a buoy (7), which is filled with low-density gas, and a photovoltaic panel is installed on the outer wall of the buoy (7). The buoy (7) is connected to the buoy (2) by multiple traction lines (8).

2. The offshore photovoltaic system according to claim 1, characterized in that, The top layer (101) includes a rubber layer, a wear-resistant layer and a film layer. The wear-resistant layer is laid on top of the rubber layer, the film layer is laid on top of the wear-resistant layer, and the photovoltaic panel is installed on the film layer.

3. The offshore photovoltaic system according to claim 1, characterized in that, The air cushion layer (103) has several air chambers, and the float (1) is equipped with an air pump (6), which is connected to several air chambers through an air pump pipe.

4. A marine photovoltaic system according to claim 1, characterized in that, The float (1) is equipped with several vertical traction ropes (9).

5. A marine photovoltaic system according to claim 1, characterized in that, The float assembly is configured as two, with two floats (2) in one float assembly located on the front and rear sides of the float body (1) respectively, and two floats (2) in the other float assembly located on the left and right sides of the float body (1) respectively.

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