Light guide type floating photovoltaic system for underwater culture and application method

Abstract

The present application relates to the technical field of fishlight fusion, and particularly relates to a light-guiding type floating photovoltaic system for underwater aquaculture and an application method. The system comprises a floating assembly, a photovoltaic assembly, a light collecting assembly, a light-guiding transmission assembly and a light-out diffusion assembly. The photovoltaic assembly is installed in a mounting groove on the floating assembly, and a light-guiding cavity is formed between the back of the photovoltaic assembly and the floating assembly. The light collecting assembly is arranged on the floating assembly and located at the gap of the photovoltaic assembly, and is used for collecting natural light at the gap of the photovoltaic assembly. The light-guiding transmission assembly is arranged in the light-guiding cavity and connected with the light collecting assembly, and is used for transmitting the natural light collected by the light collecting assembly to the underwater aquaculture area. The light-out diffusion assembly is arranged in the underwater aquaculture area and connected with the light-guiding transmission assembly, and is used for uniformly diffusing the natural light transmitted by the light-guiding transmission assembly to the underwater aquaculture area. The technical scheme of the present application can solve the problem of insufficient underwater illumination caused by the blocking of the floating body, and improve the economic and ecological benefits.

Description

Technical Field

[0001] This invention relates to the field of solar-aquaculture technology, and in particular to a light-guiding floating photovoltaic system and its application method for underwater aquaculture. Background Technology

[0002] With the advancement of energy conservation and emission reduction and the increasing demand for comprehensive development of marine resources, the integrated development model combining floating photovoltaic power generation with aquaculture has been rapidly promoted. This model can achieve the dual benefits of "power generation above water and aquaculture below water," significantly increasing the economic value per unit of water area.

[0003] In existing technologies, the installation of floating photovoltaic systems at sea will block sunlight from reaching the water surface over a large area, resulting in a decrease in water temperature, inhibition of plankton reproduction, and impact on the growth and development of aquaculture organisms.

[0004] Therefore, there is an urgent need to develop a new technical solution to solve the above-mentioned technical problems. Summary of the Invention

[0005] This invention provides a light-guiding floating photovoltaic system and its application method for underwater aquaculture, which can effectively solve the problem of insufficient underwater lighting caused by the obstruction of the floating body, thereby improving economic and ecological benefits.

[0006] In a first aspect, the present invention provides a light-guiding floating photovoltaic system for underwater aquaculture, comprising: a floating component, a photovoltaic component, a light-collecting component, a light-guiding and transmission component, and a light-emitting and diffusing component; The floating component is provided with a mounting groove, the photovoltaic component is installed in the mounting groove, and a light guiding cavity is formed between the back of the photovoltaic component and the floating component. The light-collecting component is mounted on the floating component and located at the gap between the photovoltaic components, and is used to collect natural light at the gap between the photovoltaic components; The light guiding transmission component is disposed in the light guiding cavity and connected to the light collecting component, and is used to transmit the natural light collected by the light collecting component to the underwater aquaculture area. The light-emitting diffuser is installed in the underwater aquaculture area and connected to the light-guiding transmission component, and is used to uniformly diffuse the natural light transmitted by the light-guiding transmission component into the underwater aquaculture area.

[0007] In a second aspect, the present invention provides an application method for a light-guiding floating photovoltaic system, applied to the system described in the first aspect of the present invention, the method comprising: Natural light is collected from the gaps between photovoltaic modules using light-collecting components; The collected natural light is transmitted to the underwater aquaculture area using a light guide transmission component; The light-emitting diffuser is used to evenly diffuse the transmitted natural light into the underwater aquaculture area.

[0008] This invention provides a light-guiding floating photovoltaic system and its application method for underwater aquaculture. The system allows for the installation of photovoltaic modules via mounting slots on a floating assembly, forming a light-guiding cavity between the back of the photovoltaic modules and the floating assembly. A light-collecting component is positioned between the photovoltaic modules, a light-guiding transmission component is placed within the light-guiding cavity, and a light-diffusing component is positioned within the underwater aquaculture area, creating a complete "collection-transmission-diffusing" light-guiding path. This efficiently collects natural light from the gaps between the photovoltaic modules and guides it into the underwater aquaculture area, achieving uniform diffused illumination. This effectively solves the problem of insufficient underwater lighting caused by shading from the floating body in existing floating photovoltaic systems. It does not require reducing the number of photovoltaic modules installed, ensuring the installed capacity and power generation of the photovoltaic system, while avoiding increased construction and operating costs due to the addition of anchoring devices and connection structures. While ensuring the buoyancy and structural strength of the floating body, the system achieves synergistic and efficient operation of photovoltaic power generation and aquaculture, providing a suitable lighting environment for high-economic-value aquaculture species (such as whiteleg shrimp, salmon, and oysters), which is conducive to improving the survival rate, growth rate and product quality of aquaculture organisms, and has significant economic and ecological benefits. Attached Figure Description

[0009] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0010] Figure 1 This is a structural block diagram of a light-guiding floating photovoltaic system for underwater aquaculture, provided by an embodiment of the present invention. Detailed Implementation

[0011] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0012] Please refer to Figure 1 This invention provides a light-guiding floating photovoltaic system for underwater aquaculture, comprising: a floating component 10, a photovoltaic component 20, a light-collecting component 30, a light-guiding transmission component 40, and a light-emitting diffusion component 50. The floating component 10 is provided with a mounting groove, and the photovoltaic component 20 is installed in the mounting groove. A light guiding cavity is formed between the back of the photovoltaic component 20 and the floating component 10. The light-collecting component 30 is mounted on the floating component 10 and located at the gap of the photovoltaic component 20, and is used to collect natural light at the gap of the photovoltaic component 20. The light guiding transmission component 40 is disposed in the light guiding cavity and connected to the light collecting component 30, and is used to transmit the natural light collected by the light collecting component 30 to the underwater aquaculture area. The light-emitting diffuser component 50 is installed in the underwater aquaculture area and connected to the light-guiding transmission component 40. It is used to uniformly diffuse the natural light transmitted by the light-guiding transmission component 40 into the underwater aquaculture area.

[0013] This embodiment provides a light-guiding floating photovoltaic system for underwater aquaculture, comprising: a floating component, a photovoltaic component, a light-collecting component, a light-guiding transmission component, and a light-diffusing component. The floating component has a mounting groove, and the photovoltaic component is installed within the mounting groove, forming a light-guiding cavity between the back of the photovoltaic component and the floating component. The light-collecting component is disposed on the floating component and located at the gap between the photovoltaic components, for collecting natural light from the gaps between the photovoltaic components. Natural light includes direct light, diffused light, and reflected light from the surface of the photovoltaic components. The light-guiding transmission component is disposed within the light-guiding cavity, with one end connected to the light-collecting component and the other end connected to the light-diffusing component, for transmitting the natural light collected by the light-collecting component to the underwater aquaculture area. The light-diffusing component is disposed within the underwater aquaculture area and connected to the light-guiding transmission component, for uniformly diffusing the natural light transmitted by the light-guiding transmission component to the underwater aquaculture area.

[0014] During operation, the light propagation path is as follows: sunlight (including direct light, scattered light and reflected light) is collected by the light-collecting component, enters the light-guiding transmission component, is transmitted downward through total internal reflection, and is then evenly scattered into the water body by the light-emitting diffuser component, and finally diffused to the underwater aquaculture area to enhance the light in the underwater aquaculture area.

[0015] During the aforementioned light propagation process, the direction of light changes from horizontal or oblique incidence to vertical downward propagation, ensuring that the light effectively enters the deep water; the form of light changes from a concentrated beam to a diffuse and uniform light field, avoiding excessively strong or weak underwater light spots; and the spectral composition remains consistent with sunlight, which is beneficial to the photosynthesis of aquatic plants and the growth of aquatic organisms.

[0016] This embodiment optimizes the structure and light guide design of the floating components to maximize the introduction of sunlight into the underwater aquaculture area while ensuring the buoyancy, structural strength, and installation requirements of the photovoltaic components. This meets the light requirements of high-economic-value aquaculture species and avoids the decrease in power generation and increase in cost caused by increasing the spacing between the floating components. This achieves synergistic, efficient, and low-cost operation of marine photovoltaic power generation and aquaculture.

[0017] In one embodiment of the present invention, The photovoltaic modules are installed inside the mounting groove at a preset tilt angle; The preset tilt angle represents the acute angle between the photovoltaic module and the plane containing the upper surface of the floating module. The numerical range of the preset tilt angle is [15°, 30°].

[0018] In this embodiment, in order to ensure the power generation efficiency of the photovoltaic module while providing sufficient installation space for the light transmission component below, the preset tilt angle is set to a range of 15° to 30°. When the tilt angle is 15°, the power generation efficiency of the photovoltaic module is better in the morning and evening; when the tilt angle is 30°, the power generation efficiency reaches its best at noon.

[0019] In practical engineering, the optimal angle can be selected within this range, such as 15°, 20°, 25°, or 30°, based on the latitude of the project site, sunlight conditions, and the sunlight requirements of the aquaculture species. By installing the photovoltaic modules at the aforementioned preset tilt angle, the photovoltaic modules can obtain a better incident light angle, thereby increasing power generation.

[0020] In one embodiment of the present invention, the light-collecting component includes: A light-transmitting cover, which is a hemispherical or arc-shaped structure, is installed in the gap on the front of the photovoltaic module. A solar tracker, connected to the sunshade, is used to compensate for the angle of the sunshade based on changes in the sun's position.

[0021] In this embodiment, the light-collecting cover is a hemispherical or arc-shaped structure, installed in the gap on the front of the photovoltaic modules. Specifically, the light-collecting cover is embedded in the gap between the photovoltaic modules on the upper surface of the floating module, avoiding the shadow area of ​​the photovoltaic modules to ensure maximum reception of direct and diffused light. To obtain better light-gathering effect, the radius of curvature of the light-collecting cover is preferably 80mm to 150mm. The light-collecting cover is made of optical-grade polycarbonate (PC) material, which has excellent light transmittance and impact resistance. The surface of the light-collecting cover is coated with an anti-salt spray anti-reflection film, with a light transmittance of over 92%, which can effectively resist the corrosion of the marine salt spray environment and reduce light reflection loss. A solar tracker is connected to the light-collecting cover to compensate for the angle of the light-collecting cover according to the change of the sun's position. Specifically, the solar tracker is a small single-axis or dual-axis solar tracker with a tracking accuracy of ±2°. When the solar altitude angle is below 30°, the solar tracker drives the light-collecting cover to rotate, so that the light-collecting cover faces the sun, thereby improving the collection efficiency of low-angle light and diffused light. Tests showed that adding a solar tracker can improve light collection efficiency by 20% to 40% under low-angle illumination conditions. Through the combination of the aforementioned light-collecting cover and solar tracker, this embodiment can efficiently collect natural light from the gaps between photovoltaic modules, including direct light, diffused light, and reflected light from the photovoltaic module surface, providing sufficient light energy for subsequent light transmission.

[0022] In one embodiment of the present invention, the surface of the light-collecting cover is coated with a photocatalytic self-cleaning coating, which includes nano-titanium dioxide and nano-silver.

[0023] In this embodiment, the surface of the light-transmitting dome is coated with a photocatalytic self-cleaning coating. The photocatalytic self-cleaning coating comprises nano-titanium dioxide and nano-silver. This coating exhibits superhydrophilic properties, with a contact angle with water of less than 10°. When rainwater or seawater flows over the surface of the light-transmitting dome, water droplets quickly spread across the coating surface to form a water film, carrying away contaminants adhering to the surface and achieving a self-cleaning effect. Under sunlight, the photocatalytic self-cleaning coating can generate a photocatalytic reaction, decomposing organic contaminants such as oil stains and algal secretions adhering to the surface of the light-transmitting dome. This coating also effectively prevents marine organisms such as barnacles and algae from adhering and growing on the surface of the light-transmitting dome, thereby avoiding a decrease in light transmittance due to biological adhesion, reducing the frequency of manual cleaning and maintenance, and extending the effective service life of the light-transmitting dome in the marine environment.

[0024] In one embodiment of the present invention, the light transmission component is a light guide tube, one end of which is connected to the light collection component and the other end is connected to the light emission and diffusion component. The light guide tube is made of flexible aluminum-plastic composite material, which includes an outer layer, a middle layer and an inner layer. The outer layer is a polyethylene material layer, the middle layer is an aluminum foil layer and the inner layer is a silver film layer.

[0025] In this embodiment, the light transmission component is a light guide tube. One end of the light guide tube is connected to the light-collecting component, and the other end is connected to the light-emitting diffuser component. The light guide tube is made of flexible aluminum-plastic composite material, including an outer layer, a middle layer, and an inner layer: the outer layer is a polyethylene material layer, the middle layer is an aluminum foil layer, and the inner layer is a silver film layer. The outer diameter of the light guide tube is 20-50 mm, and the wall thickness is 2-4 mm. The reflectivity of the inner silver film layer is ≥95%, and the light transmission efficiency is ≥85%. The light guide tube can be bent at 90°, which can adapt to the dynamic deformation of the floating body's wave sway ±15° and tidal rise and fall ±2 m. A sealing structure is provided where the light guide tube passes through the light-guiding cavity, with a sealing rating of IP68, to prevent seawater infiltration. The unit length weight of the light guide tube is ≤0.5 kg / m. With the above structure, the light guide tube can achieve efficient and stable transmission of natural light in a dynamic marine environment.

[0026] In one embodiment of the present invention, the light-emitting diffuser component is a diffuser; The diffuser is a microstructured diffuser plate or a porous scattering structure used to convert a concentrated beam of light into a uniform diffuse light field. The diffuser is equipped with flow guide fins on its exterior.

[0027] In this embodiment, the light-emitting diffuser component is a diffuser. The diffuser is positioned 0.5-1.5m below the water surface below the floating assembly. The diffuser is a microstructured diffuser plate or a porous scattering structure, made of PC anti-salt spray material. The diffuser surface has an array of microlenses or V-grooves, with a microstructure period of 0.2-1mm. The diffuser is used to convert the concentrated light beam into a uniform diffused light field. Specifically, the diffuser's light emission half-angle is 40°-60°, covering an area with a diameter of 3-6m below the device, and the illumination uniformity (ratio of minimum to maximum illuminance) is ≥0.6. Through multiple refractions and reflections of the microstructure, the glare effect caused by direct strong light can be eliminated, avoiding photostress to aquaculture organisms. The diffuser is externally equipped with guide fins. These fins reduce the impact of waves on the diffuser and guide water flow uniformly through the light emission area. The diffuser surface is coated with a coating to prevent marine organism adhesion. Specifically, the coating is a nano self-cleaning coating that can prevent marine organisms such as barnacles and algae from adhering to the surface of the diffuser, thereby extending the maintenance cycle to 6-12 months.

[0028] In one embodiment of the present invention, there are multiple floating components, which are spaced apart and connected to adjacent floating components by flexible connectors.

[0029] In this embodiment, multiple floating components are used. These components are arranged at intervals along the photovoltaic array direction, forming a continuous or intermittent underwater illumination band. The spacing between adjacent floating components is 3-8m, which can be adjusted according to the light requirements of the aquaculture species. For example, for aquaculture species that prefer strong light, the spacing can be appropriately reduced to enhance underwater light intensity; for aquaculture species that are more shade-tolerant, the spacing can be appropriately increased to reduce system costs. Adjacent floating components are connected by flexible connectors. The flexible connectors allow for ±10° relative rotation between adjacent floating components, effectively adapting to array deformation caused by waves and avoiding stress concentration and structural damage caused by rigid connections.

[0030] The system also includes an anchoring system. This system employs multi-point anchoring, with the anchor chain pretension set to 1.2-1.5 times the maximum horizontal load of the floating body, ensuring system stability under wind and wave conditions and preventing excessive drifting or collisions of the floating array. Additionally, an electrical system is included. Photovoltaic modules are connected in series or parallel via waterproof cables. These cables are arranged along the edges of the floating modules to avoid interference with the light-guiding components, ensuring electrical safety without affecting the light-guiding path.

[0031] Furthermore, the present invention provides an application method for a light-guiding floating photovoltaic system, applicable to a light-guiding floating photovoltaic system used in underwater aquaculture, the method comprising: Natural light is collected from the gaps between photovoltaic modules using light-collecting components; The collected natural light is transmitted to the underwater aquaculture area using a light guide transmission component; The light-emitting diffuser is used to evenly diffuse the transmitted natural light into the underwater aquaculture area.

[0032] In this embodiment, an application method for a light-guiding floating photovoltaic system is provided. The method includes: a light-collecting component collecting natural light, a light-guiding transmission component transmitting the natural light to an underwater aquaculture area, and a light-emitting diffusion component uniformly diffusing the natural light to the underwater aquaculture area.

[0033] In one embodiment of the present invention, solar altitude angle information is collected in real time; When the sun's altitude angle is less than a preset angle threshold, the solar tracker drives the light-collecting dome to rotate, so that the light-collecting dome faces the sun. When the sun's altitude angle is greater than or equal to a preset angle threshold, the light-collecting cover is kept in its initial position.

[0034] In this embodiment, when the sun's altitude angle is less than a preset angle threshold, it indicates that the sun is at a low angle (e.g., in the morning or evening), and the light is obliquely incident, resulting in low reception efficiency of the light-collecting dome. In this case, a solar tracker is used to drive the light-collecting dome to rotate, orienting it towards the sun, thereby improving the collection efficiency of low-angle and diffused light. When the sun's altitude angle is greater than or equal to the preset angle threshold, it indicates that the sun is at a high angle (e.g., around noon), and the light is nearly perpendicularly incident, resulting in higher reception efficiency of the light-collecting dome. In this case, the light-collecting dome remains in its initial position without rotation, saving energy. In practical applications, the preset angle threshold can be set according to the latitude of the project location, the season, and the light requirements of the aquaculture species.

[0035] In one embodiment of the present invention, it further includes: When the solar altitude angle is less than a preset angle threshold, the power generation of the photovoltaic module is collected; When the power generation is greater than or equal to the power threshold required to drive the solar collector, the solar tracker is powered by the photovoltaic modules, which drive the solar collector to rotate toward the sun. When the power generation is less than the power threshold required to drive the solar collector, the solar tracker is powered by energy storage devices or an external power source, driving the solar collector to rotate toward the sun.

[0036] In this embodiment, the power supply control method for the solar tracker is further defined. When the sun's altitude angle is less than a preset angle threshold, it indicates that the solar collector needs to be rotated to improve light collection efficiency. At this time, the current power generation of the photovoltaic module is collected. The collected current power generation is compared with the power threshold required to drive the solar collector. When the current power generation is greater than or equal to the power threshold required to drive the solar collector, it indicates that the photovoltaic module has sufficient power generation capacity. In this case, the solar tracker is powered by the photovoltaic module, and the solar collector is driven to rotate towards the sun using the electricity generated by the photovoltaic module itself. When the current power generation is less than the power threshold required to drive the solar collector, it indicates that the photovoltaic module's power generation capacity is insufficient to drive the solar collector to rotate (e.g., under weak light conditions such as early sunrise, late sunset, or cloudy days). In this case, the solar tracker is powered by an energy storage device or an external power source, and the solar collector is driven to rotate towards the sun using the electricity stored in the energy storage device or the electricity provided by the external power source, ensuring that the angle adjustment of the solar collector can be completed under any lighting conditions.

[0037] In summary, this invention provides a light-guiding floating photovoltaic system and its application method for underwater aquaculture. It enables the installation of photovoltaic modules via mounting slots on a floating component, forming a light-guiding cavity between the back of the photovoltaic module and the floating component. A light-collecting component is positioned at the gaps between the photovoltaic modules, a light-guiding transmission component is positioned within the light-guiding cavity, and a light-diffusing component is positioned within the underwater aquaculture area, forming a complete "collection-transmission-diffusing" light-guiding path. This efficiently collects natural light from the gaps between the photovoltaic modules and guides it into the underwater aquaculture area, achieving uniform diffused illumination and effectively solving the problem of insufficient underwater lighting caused by shading from the floating body in existing floating photovoltaic systems. It does not require reducing the number of photovoltaic modules installed, ensuring the installed capacity and power generation of the photovoltaic system, while avoiding increased construction and operating costs due to the addition of anchoring devices and connection structures. While ensuring the buoyancy and structural strength of the floating body, the system achieves synergistic and efficient operation of photovoltaic power generation and aquaculture. It provides a suitable lighting environment for high-value aquaculture species (such as whiteleg shrimp, salmon, and oysters), which is beneficial for improving the survival rate, growth rate, and product quality of farmed organisms, resulting in significant economic and ecological benefits. The photovoltaic modules are installed at a 15°-30° angle, which increases power generation and provides suitable installation space for the light transmission components while ensuring the stability of the floating body. A hemispherical light-collecting dome, combined with a solar tracker, enhances light collection efficiency under low-angle lighting conditions. The photocatalytic self-cleaning coating (nano-titanium dioxide + nano-silver) on the surface of the light-collecting dome has super-hydrophilic properties, preventing the adhesion of barnacles, algae, and other organisms, reducing maintenance frequency.

[0038] It should be noted that, in this invention, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0039] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is only used to illustrate the technical solution of the present invention, and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention are included within the scope of protection of the present invention.

Claims

1. A light-guiding floating photovoltaic system for underwater aquaculture, characterized in that, include: Floating modules, photovoltaic modules, light-collecting modules, light-guiding and transmission modules, and light-emitting and diffusing modules; The floating component is provided with a mounting groove, the photovoltaic component is installed in the mounting groove, and a light guiding cavity is formed between the back of the photovoltaic component and the floating component. The light-collecting component is mounted on the floating component and located at the gap between the photovoltaic components, and is used to collect natural light at the gap between the photovoltaic components; The light guiding transmission component is disposed in the light guiding cavity and connected to the light collecting component, and is used to transmit the natural light collected by the light collecting component to the underwater aquaculture area. The light-emitting diffuser is installed in the underwater aquaculture area and connected to the light-guiding transmission component, and is used to uniformly diffuse the natural light transmitted by the light-guiding transmission component into the underwater aquaculture area.

2. The system according to claim 1, characterized in that, The photovoltaic module is installed inside the mounting slot at a preset tilt angle; The preset tilt angle represents the acute angle between the photovoltaic module and the plane containing the upper surface of the floating module, and the numerical range of the preset tilt angle is [15°, 30°].

3. The system according to claim 1, characterized in that, The light-collecting component includes: A light-collecting cover, which is a hemispherical or arc-shaped structure, is installed in the gap on the front of the photovoltaic module; A solar tracker, connected to the light-collecting dome, is used to compensate the angle of the light-collecting dome according to changes in the position of the sun.

4. The system according to claim 3, characterized in that, The surface of the light-collecting cover is coated with a photocatalytic self-cleaning coating, which includes nano-titanium dioxide and nano-silver.

5. The system according to claim 1, characterized in that, The light transmission component is a light guide tube, one end of which is connected to the light collection component and the other end of which is connected to the light emission and diffusion component. The light guide tube is made of flexible aluminum-plastic composite material, which includes an outer layer, a middle layer and an inner layer. The outer layer is a polyethylene material layer, the middle layer is an aluminum foil layer and the inner layer is a silver film layer.

6. The system according to claim 1, characterized in that, The light-emitting diffuser component is a diffuser; The diffuser is a microstructured diffuser plate or a porous scattering structure, used to convert a concentrated beam of light into a uniform diffused light field. The diffuser is provided with flow guide fins on its exterior.

7. The system according to claim 1, characterized in that, The number of floating components is multiple, and the multiple floating components are arranged at intervals. Adjacent floating components are connected by flexible connectors.

8. An application method for a light-guiding floating photovoltaic system, characterized in that, Applied to the system according to any one of claims 1-7, the method comprises: Natural light is collected from the gaps between photovoltaic modules using light-collecting components; The collected natural light is transmitted to the underwater aquaculture area using a light guide transmission component; The light-emitting diffuser is used to evenly diffuse the transmitted natural light into the underwater aquaculture area.

9. The method according to claim 8, characterized in that, Also includes: Real-time acquisition of solar altitude angle information; When the sun's altitude angle is less than a preset angle threshold, the solar tracker drives the light-collecting dome to rotate, so that the light-collecting dome faces the sun. When the sun's altitude angle is greater than or equal to a preset angle threshold, the light-collecting cover is kept in its initial position.

10. The method according to claim 9, characterized in that, Also includes: When the solar altitude angle is less than a preset angle threshold, the power generation of the photovoltaic module is collected; When the power generation is greater than or equal to the power threshold required to drive the solar collector, the solar tracker is powered by the photovoltaic modules, which drive the solar collector to rotate toward the sun. When the power generation is less than the power threshold required to drive the solar collector, the solar tracker is powered by energy storage devices or an external power source, driving the solar collector to rotate toward the sun.

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