CN219312985U - Floating photovoltaic system and photovoltaic array island - Google Patents

Abstract

The utility model relates to a floating photovoltaic system and a photovoltaic array island. The technical scheme of the utility model is a floating photovoltaic system, which is characterized in that: the floating body comprises an upper layer structure and a lower layer structure positioned below the upper layer structure, wherein the upper layer structure is made of impermeable foam materials, and the lower layer structure is made of permeable foam materials capable of absorbing water. The utility model is suitable for the field of offshore photovoltaic. The beneficial effects of the utility model are as follows: the floating body comprises the upper layer structure and the lower layer structure, when the floating body floats in water, the lower layer structure absorbs water at least partially or completely below the water surface, meanwhile, the lower layer structure absorbs water to enable the floating body to have larger inertia, the upper layer structure does not absorb water, and upward buoyancy can be provided, so that the floating body has larger anti-overturning and drifting capabilities.

Description

Floating photovoltaic system and photovoltaic array island

Technical Field

The utility model relates to a floating photovoltaic system and a photovoltaic array island. Is suitable for the field of offshore photovoltaics.

Background

The floating photovoltaic system at sea requires a special structure to resist the huge force of sea waves. Such a system must be stable enough to prevent capsizing and drifting. This is too expensive for commercial use of the photovoltaic system if a rigid floating structure is used entirely at sea.

Chinese patent publication No. CN206481252U, a floating photovoltaic system, proposes a floating platform for providing ballast weights, comprising rigid solar modules indirectly mounted on the platform, the platform consisting of a floating foam concrete slab and a floating float, under which the platform structure is stabilized by suspending the ballast weights.

In order to stabilize the platform structure, the prior art uses a ballast weight to suspend under the platform, but the mode increases the overall net weight of the system, increases the transportation difficulty, the transportation cost, and the installation difficulty and the installation cost.

Disclosure of Invention

The utility model aims to solve the technical problems that: in order to solve the problems, a floating photovoltaic system and a photovoltaic array island are provided.

The technical scheme adopted by the utility model is as follows: a floating photovoltaic system, characterized by: the floating body comprises an upper layer structure and a lower layer structure positioned below the upper layer structure, wherein the upper layer structure is made of impermeable foam materials, and the lower layer structure is made of permeable foam materials capable of absorbing water.

The impermeable foam material is polyurethane foam, expanded polystyrene, polyethylene foam, polypropylene foam or neoprene foam with a closed cell structure.

The permeable foam has an air permeability of at least 4000L/m ² Pore diameter of 0.25-2mm, density of 10-40kg/m ³ Between them.

The permeable foam material adopts polyurethane foam and latex foam rubber with open-cell structures.

The upper layer structure and the lower layer structure are combined into a whole through the wrapping film wound on the surfaces of the upper layer structure and the lower layer structure.

And a plurality of water permeable holes are formed in the wrapping film.

The wrapping film is made into a film wrapping sleeve, and a plurality of film wrapping sleeves are sleeved on the upper layer structure and the lower layer structure together, so that the upper layer structure and the lower layer structure are combined into a whole.

The outer side of the wrapping film is provided with a plurality of additional sleeves, the plurality of additional sleeves are sleeved on the upper layer structure and the lower layer structure together, so that the upper layer structure and the lower layer structure are combined into a whole, and the plurality of additional sleeves are connected through an additional layer.

The periphery of the floating body is provided with a flexible connecting mechanism which can connect the floating body with the adjacent floating body.

A photovoltaic array island, characterized by: the floating island comprises a plurality of floating photovoltaic systems, wherein the floating photovoltaic systems are connected to form a floating island body, the center of the bottom of the floating island body is connected with a mooring shaft, and the lower end of the mooring shaft is fixed on a seabed through an anchor line.

The beneficial effects of the utility model are as follows: the floating body comprises the upper layer structure and the lower layer structure, when the floating body floats in water, the lower layer structure absorbs water at least partially or completely below the water surface, meanwhile, the lower layer structure absorbs water to enable the floating body to have larger inertia, the upper layer structure does not absorb water, and upward buoyancy can be provided, so that the floating body has larger anti-overturning and drifting capabilities.

The utility model stabilizes the floating body by absorbing water through the lower layer structure without adding ballast weights, thereby ensuring the weight of the whole system and further reducing the transportation and installation difficulty and cost. The upper layer structure and the lower layer structure are combined into a whole through the wrapping film, and compared with the common mode of connecting through an adhesive, the wrapping film has longer service life in a connecting mode.

Drawings

Fig. 1 is a top view of a photovoltaic array island in an embodiment.

Fig. 2 is a side view of a photovoltaic array island in an embodiment.

Fig. 3 is a schematic structural diagram of a floating photovoltaic system in an embodiment.

Fig. 4 is a schematic view of the arrangement of the membrane envelope in the embodiment.

Fig. 5 and 6 are schematic diagrams of the arrangement of the additional sleeve and the additional layer in the embodiment.

Fig. 7 is a schematic view showing an arrangement of the flexible coupling mechanism in the embodiment.

1. A floating island body; 11. a floating photovoltaic system; 111. a lower layer structure; 112. a superstructure; 113. a wrapping film; 113a, a film envelope; 114. a carrier film; 115. a photovoltaic module; 116. adding a sleeve; 117. an additional layer; 118. a flexible coupling mechanism; 2. a mooring shaft; 3. an anchor line.

Detailed Description

As shown in fig. 1 and 2, the present embodiment is a photovoltaic array island, which has a floating island body and a mooring shaft connected to the bottom center of the floating island body, wherein the lower end of the mooring shaft is fixed on the seabed through an anchor line. The floating island body is formed by splicing and combining a plurality of floating photovoltaic systems, the floating photovoltaic systems are provided with floating bodies, and at least one photovoltaic module is arranged on the upper surfaces of the floating bodies.

As shown in fig. 3, the floating body in this example includes an upper structure and a lower structure, both of which have a density smaller than that of water, and the lower structure is located below the upper structure, and the horizontal width and length of the upper and lower structures are much greater than the vertical thickness thereof.

The upper layer structure in this embodiment is made of an impermeable foam material selected from the group of plastic foam materials having a closed cell structure, such as polyurethane foam, expanded polystyrene, polyethylene foam, polypropylene foam, neoprene foam having a closed cell structureThe method comprises the steps of carrying out a first treatment on the surface of the The underlying structure is selected from the group consisting of plastic foam materials having an open cell structure, such as polyurethane foam and latex foam rubber having an open cell structure, the permeable foam having an air permeability (air permeability means the ability of water to penetrate into the foam material of the underlying structure, thereby expelling air from the pores of the foam material) of at least 4000L/m ² Pore diameter of 0.25-2mm, density of 10-40kg/m ³ Between them.

When the floating photovoltaic system floats on the water surface, the lower layer structure absorbs water at least partially or completely below the water surface, the lower layer structure absorbs water to enable the photovoltaic system to have larger inertia, the upper layer structure does not absorb water to provide an upward buoyancy, and the upper layer structure and the lower layer structure are combined to enable the floating body to have larger anti-overturning and drifting capabilities. The upper layer and the lower layer of the floating body are made of different materials, and the lower layer is soaked by water in the use process, so that the two layers have different elasticity and different expansion and compression coefficients. For example, the bottom layer is significantly more flexible than the top layer and can be more easily compressed and stretched. When the floating body deforms along with wave impact, the deformation of the upper layer is always limited in a smaller range, and the photovoltaic module mounted on the floating body can be prevented from being damaged.

In this embodiment, the upper layer structure and the lower layer structure are overlapped up and down to form a whole, and the upper layer structure and the lower layer structure are tightly combined together through a wrapping film wrapping the outer surface of the whole. The wrapping film may be an Ethylene Vinyl Acetate (EVA) film, or alternatively a polyvinyl chloride (PVC) film, and both types of film materials may be joined together by welding techniques such as thermal or chemical welding, or by purely mechanical means such as stitching, thereby avoiding the use of adhesives or other fasteners.

In this case, the lower layer structure needs to be capable of absorbing water, so that certain water permeability is required for the wrapping film, and the simpler method is to arrange a plurality of water permeable holes or only wrap part of the lower layer structure on the wrapping film, so that gaps are reserved when the floating body is inserted into water, and water can be absorbed through the water permeable holes or the gaps.

Fig. 4 shows an arrangement of the wrapping film according to the embodiment, in which the wrapping film is arranged in a film wrapper, and the film wrapper is sleeved on an integral structure formed by overlapping the upper and lower structures, so that the upper and lower structures are tightly combined, and the edges between the adjacent film wrappers are not overlapped, so that a sufficient gap is left. The film covers in this case are each hooked together under (pre) tension with the two ends on the upper side and then chemically bonded together, whereby each film cover forms a closed annular film (film envelope) with the winding direction parallel to the ZOY shown in fig. 4 and each film cover has relative freedom of movement in the X-axis direction shown in fig. 4.

Fig. 5 and 6 show another arrangement of the wrapping film in the embodiment, in which the wrapping film is wrapped on the integral structure formed by overlapping the upper layer structure and the lower layer structure, a plurality of additional sleeves are arranged on the outer side of the wrapping film and sleeved on the integral structure formed by overlapping the upper layer structure and the lower layer structure, so that the upper layer structure and the lower layer structure are tightly combined, and the plurality of additional sleeves are connected through additional layers. The end of the additional layer is firmly connected to the top or bottom of one of the additional sleeves at the end, the additional layer is connected to each additional sleeve in the X-axis direction with a gap between the additional sleeves, the additional sleeves are connected to the wrapping film on the inner side, the additional layer is movable at the bottom and does not cling to the wrapping film, in such a way that the necessary freedom of movement can be achieved.

As shown in fig. 7, in this embodiment, a flexible coupling mechanism is provided around the floating body, by which adjacent floating bodies can be connected. The flexible coupling mechanism adopts a closing element with a hook-shaped closing, the closing element is in the form of a strip-shaped closing strip, and the floating photovoltaic system can be matched with the closing strip on the adjacent floating photovoltaic system to realize two-system connection through the closing strip, so that a plurality of floating photovoltaic systems can be connected to form a photovoltaic array island.

In the embodiment, the photovoltaic module can adopt a rigid photovoltaic module or a flexible photovoltaic module, and the rigid photovoltaic module can be directly arranged on the floating body or arranged on a frame connected to the floating body; the flexible photovoltaic module may be mounted directly on the floating body, for example via a carrier film which is connected to the wrapping film by welding or stitching the layers.

Claims (10)

1. A floating photovoltaic system, characterized by: the floating body comprises an upper layer structure and a lower layer structure positioned below the upper layer structure, wherein the upper layer structure is made of impermeable foam materials, and the lower layer structure is made of permeable foam materials capable of absorbing water.

2. The floating photovoltaic system according to claim 1, wherein: the impermeable foam material is polyurethane foam, expanded polystyrene, polyethylene foam, polypropylene foam or neoprene foam with a closed cell structure.

3. The floating photovoltaic system according to claim 1, wherein: the permeable foam has an air permeability of at least 4000L/m ² The pore diameter is between 0.25 and 2mm, and the density is between 10 and 40 kg/m.

4. A floating photovoltaic system according to claim 3, characterized in that: the permeable foam material adopts polyurethane foam or latex foam rubber with an open-cell structure.

5. The floating photovoltaic system according to claim 1, wherein: the upper layer structure and the lower layer structure are combined into a whole through the wrapping film wound on the surfaces of the upper layer structure and the lower layer structure.

6. The floating photovoltaic system according to claim 5, wherein: and a plurality of water permeable holes are formed in the wrapping film.

7. The floating photovoltaic system according to claim 5 or 6, characterized in that: the wrapping film is made into a film wrapping sleeve, and a plurality of film wrapping sleeves are sleeved on the upper layer structure and the lower layer structure together, so that the upper layer structure and the lower layer structure are combined into a whole.

8. The floating photovoltaic system according to claim 5 or 6, characterized in that: the outer side of the wrapping film is provided with a plurality of additional sleeves, the plurality of additional sleeves are sleeved on the upper layer structure and the lower layer structure together, so that the upper layer structure and the lower layer structure are combined into a whole, and the plurality of additional sleeves are connected through an additional layer.

9. The floating photovoltaic system according to claim 1, wherein: the periphery of the floating body is provided with a flexible connecting mechanism which can connect the floating body with the adjacent floating body.

10. A photovoltaic array island, characterized by: the floating photovoltaic system according to any one of claims 1-9, wherein the floating photovoltaic systems are connected to form a floating island body, a mooring shaft is connected to the center of the bottom of the floating island body, and the lower end of the mooring shaft is fixed on the seabed through an anchor line.

Images