A power generation system based on water floating island

Abstract

The utility model discloses a kind of power generation systems based on water floating island, belong to wave energy generation field, including floating island, power conversion component, storage tank, impeller and generator set. Power conversion component is installed to floating island, can adopt "rocker arm-connecting rod-piston cylinder" or "push arm-piston cylinder" structure, through inverted conical platform shape floating ball capture wave reciprocating motion conversion into high-pressure fluid;Storage tank is equipped with discharge pressure control valve to realize pressure stabilization, discharge outlet spouts fluid and drives impeller rotation, and then drives generator set to generate electricity. The system can maximize the use of platform space by optimizing the layout of storage tank. The electricity generated meets the needs of floating island, and the surplus electricity can also be transmitted to land. The floating island is a detachable wave floating island with a wave-releasing chamfer at the bottom, and has strong stability. The system is suitable for different wave conditions, with efficient energy conversion, stable power supply, low cost per kilowatt-hour, and no dependence on external power grid. It is suitable for multiple scene applications and has significant practical value and economic benefits.

Description

Technical Field

[0001] This utility model belongs to the field of wave energy power generation technology, specifically relating to a power generation system based on a floating island on water. Background Technology

[0002] Currently, there are already floating structures based on floating islands on the market, such as the utility model patent with Chinese patent announcement number CN216468353U entitled "A Floating Structure Chassis" and the utility model patent with Chinese patent announcement number CN213677072U entitled "A Demountable Assembled Floating Structure Chassis", both of which are used for constructing floating structures.

[0003] However, electricity supply has become a major challenge for the development of floating islands. Relying on land-based power lines would severely limit the mobility and flexibility of these islands; while relying solely on battery storage cannot meet long-term, continuous power demands, and battery replacement is inconvenient. Although solar power generation devices can compensate for the power shortage to some extent, they are greatly affected by weather and day / night cycles, resulting in unstable power generation and difficulty in meeting the needs of high-power equipment.

[0004] Therefore, how to fully and stably utilize the inexhaustible wave energy for power generation on floating islands has become a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of existing floating islands in terms of power supply, such as dependence on external power grids, insufficient energy storage, and single energy source. It provides a power generation system based on floating islands that can efficiently convert wave energy into electrical energy, providing stable and continuous power support for floating islands, thereby enhancing their autonomy and application scope.

[0006] The above-mentioned objective of this utility model is achieved through the following technical solution: a power generation system based on a floating island, characterized in that: it includes a floating island, a power conversion component, a storage tank, an impeller, and a generator set; the power conversion component is installed on the floating island and is used to convert the reciprocating motion of waves into high-pressure fluid; the output end of the power conversion component is connected to the storage tank; the storage tank is provided with a discharge port, which is located above the impeller and aligned with its blades; the power output shaft of the impeller is connected to the generator set.

[0007] Furthermore, the power conversion component is at least one set.

[0008] Furthermore, the power conversion assembly includes a rocker arm, a connecting rod, and a piston cylinder; one end of the rocker arm is hinged to the floating island, and the other end is fixed with a float; one end of the connecting rod is hinged to the inner side of the rocker arm, and the other end of the connecting rod is hinged to the piston of the piston cylinder; the working chamber of the piston cylinder is provided with an inlet and an outlet, both of which are connected to a check valve, and the outlet is connected to a storage tank.

[0009] Furthermore, the power conversion assembly includes a push arm and a piston cylinder. The piston cylinder is fixed above the water surface by a bracket. The piston of the piston cylinder is connected to a push arm, and a float is connected to the bottom of the push arm.

[0010] Furthermore, the float is shaped like an inverted frustum.

[0011] Furthermore, the storage tank is equipped with a discharge pressure control valve and a safety valve.

[0012] Furthermore, the floating island is a detachable floating island. For example, the chassis structure disclosed in Chinese Utility Model Patent Publication No. CNU entitled "A Chassis for a Floating Structure" and Chinese Utility Model Patent Publication No. CNU entitled "A Demountable Assembled Offshore Structure Chassis" can be adopted.

[0013] Furthermore, the bottom of the floating island is provided with a wave-dissipating chamfer.

[0014] The advantages of this utility model compared with the prior art are: 1. High wave energy utilization: By using two different power conversion components, it can adapt to different wave conditions (such as wave height and frequency), flexibly capturing the kinetic energy of the reciprocating motion of waves and converting it into high-pressure fluid. The energy conversion path is clear and efficient, solving the problem of poor adaptability of traditional wave power generation devices. The inverted truncated cone-shaped float can reduce wave impact resistance and improve energy capture efficiency.

[0015] 2. Stable and continuous power supply: By using a storage tank to temporarily store and buffer high-pressure fluid, and in conjunction with a discharge pressure control valve to precisely regulate the fluid discharge pressure and timing, the energy fluctuations caused by wave undulations can be balanced, providing a stable power input to the impeller, thereby ensuring that the generator set outputs a continuous and stable power, effectively compensating for the shortcomings of new energy sources such as solar energy that are affected by the environment.

[0016] 3. Strong modularity: The power conversion components adopt a modular design, and both structures can be installed independently on the floating island. They are easy to disassemble, replace and maintain. The number of components can be flexibly configured according to the size of the floating island and the power generation needs, making them highly adaptable.

[0017] 4. Enhance the autonomy of floating islands: Provide independent power sources for floating islands, freeing them from dependence on land-based power grids, significantly enhancing their mobility and flexibility, and expanding their application scope in remote waters, emergency rescue, marine aquaculture, and other scenarios.

[0018] 5. Excellent adaptability and stability: The floating island adopts a wave-dissipating design and has a wave-dissipating chamfer at the bottom, which can effectively weaken the impact of waves and reduce the swaying amplitude of the floating island, providing a basic guarantee for the stable operation of power conversion components and other equipment.

[0019] 6. Wide range of applications and significant economic benefits: In addition to meeting the electricity needs of the floating island for lighting, communication, and aquaculture equipment, the system generates surplus electricity which can be transmitted to the land-based power grid via submarine cables or dedicated transmission equipment for commercial electricity sales. Furthermore, by optimizing the installation layout of the storage tanks (placing them at higher elevations when the fluid is water and on the platform surface when the fluid is air), the space above the floating island platform can be maximized for other commercial operations, thereby increasing overall profitability. Attached Figure Description

[0020] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with their description, serve to explain the present invention, but do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a three-dimensional structural diagram of Embodiment 1 of this utility model.

[0021] Figure 2 This is a top view of Embodiment 1 of this utility model.

[0022] Figure 3 yes Figure 2 Sectional view at point AA.

[0023] Figure 4 This is a partial structural schematic diagram of the power conversion component in Embodiment 1 of this utility model.

[0024] Figure 5 This is a three-dimensional structural diagram of Embodiment 2 of this utility model.

[0025] Figure 6 This is a top view of Embodiment 2 of this utility model.

[0026] Figure 7 yes Figure 6 Sectional view at point BB.

[0027] Figure 8 This is a partial structural schematic diagram of the power conversion component in Embodiment 2 of this utility model.

[0028] Explanation of reference numerals in the attached diagram: 1-Floating island; 11-Wave-discharging chamfer; 2-Power conversion component; 21-Rocker arm; 22-Connecting rod; 23-Piston cylinder; 231-Piston; 232-Inlet; 233-Outlet; 234-Check valve; 24-Float; 25-Push arm; 3-Storage tank; 31-Discharge port; 32-Discharge pressure control valve; 33-Safety valve; 4-Impeller; 5-Generator set; 6-Support; 7-Water pipe. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.

[0030] Example 1: Rocker arm-linkage type power conversion assembly.

[0031] like Figures 1 to 4 As shown, the power generation system based on a floating island in this embodiment consists of a floating island 1, a power conversion assembly 2 with a "rocker arm-connecting rod-piston cylinder" structure, a storage tank 3, an impeller 4, and a generator set 5. The rocker arm-connecting rod power conversion assembly 2 serves as the core of energy capture. Through the coordinated transmission of the rocker arm and connecting rod, it converts the reciprocating motion of the wave-driven inverted cone-shaped float into the linear motion of the piston, thereby generating high-pressure fluid. The storage tank 3 is equipped with a discharge pressure control valve 32 and a safety valve 33 to achieve temporary storage and pressure stabilization of the high-pressure fluid. The impeller 4 converts the fluid pressure energy into mechanical energy, which is ultimately output as electrical energy through the generator set 5, forming a power generation link adapted to low- and medium-frequency waves. The floating island 1 is a wave-dischargeable floating island with a wave-discharge chamfer 11 at the bottom to ensure the overall stability of the system.

[0032] I. Component Preparation and Assembly: Floating Island 1: It adopts a wave-dissipating structure with a wave-dissipating chamfer 11 at the bottom. It is made of metal or composite material with excellent corrosion resistance to ensure good stability and wave resistance in water. Power conversion assembly 2 includes a rocker arm 21, a connecting rod 22, a piston cylinder 23, and a float 24. The rocker arm 21 is made of high-strength, lightweight material, with one end hinged to a mounting base on the side of the floating island 1, and the other end extending to the water surface. The float 24 is shaped like an inverted truncated cone, employing a corrosion-resistant, high-strength, sealed structure, and is fixed to the end of the rocker arm 21 away from the floating island, allowing it to rise and fall freely with the waves. The connecting rod 22 is made of rigid transmission material, with both ends connected to the inner side of the rocker arm 21 and the piston 231 of the piston cylinder 23 via hinges. The piston cylinder 23 is a pressure-resistant cylinder structure, with an inlet 232 and an outlet 233 on its working chamber. Both ports are equipped with check valves 234. The inlet 232 connects to an external fluid source such as water or air. When the fluid is air, the inlet 232 can be suspended. When the fluid is water, the inlet 232 extends underwater through a water pipe 7. The outlet 233 is connected to a storage tank 3 via a pipeline. Storage tank 3: A pressure-resistant, sealed container used to store the high-pressure fluid transported by power conversion assembly 2. Its installation location is optimized based on the fluid source type: when the fluid is water, the storage tank should be installed at a high point on the floating platform (e.g., Figure 1 As shown in the figure, gravitational potential energy can be used to assist drainage; when the fluid is air, the air tank and air pipe can be installed on the platform ground (not shown), and the upward air jet drives the impeller located on the platform, thereby making full use of the space above the platform for other commercial purposes. The storage tank 3 is provided with a discharge port 31 on the side wall, top or bottom (when the fluid is water, the storage tank 3 is at a high position, and the discharge port 31 is generally located at the bottom of the storage tank 3; when the fluid is air, the storage tank 3 is at a low position, and the discharge port 31 is generally located on the side wall or top of the storage tank 3). A discharge pressure control valve 32 is installed at the discharge port 31 to adjust the timing and rate of fluid discharge. A safety valve 33 is provided on the top of the storage tank 3. Impeller 4 and generator set 5: Impeller 4 is installed directly below the outlet 31, and its blade structure is adapted to the impact force of high pressure fluid; generator set 5 is connected to the power output shaft of impeller 4, which can convert the mechanical energy generated by the rotation of impeller into electrical energy.

[0033] II. Working Principle: When the waves rise, the truncated cone-shaped float 24 moves upward under the action of buoyancy, causing the rocker arm 21 to swing around the hinge point away from the floating island. The rocker arm 21 pushes the piston 231 in the piston cylinder 23 to move into the cylinder body through the connecting rod 22, compressing the fluid in the working chamber. At this time, the check valve of the inlet 232 is closed due to the pressure difference, and the check valve of the outlet 233 is opened, and the high-pressure fluid enters the storage tank 3 through the outlet 233. When the waves fall, the float 24 falls with the water level, causing the rocker arm 21 to swing towards the floating island. The connecting rod 22 pulls the piston 231 to reset to the outside of the cylinder body, and a negative pressure is formed in the working chamber. The check valve of the outlet 233 is closed, and the check valve of the inlet 232 is opened, and the external fluid is sucked into the working chamber, completing one fluid suction and discharge cycle.

[0034] As the cycle continues, the fluid pressure in storage tank 3 gradually increases. When it reaches the upper limit threshold of the discharge pressure control valve 32, the valve opens, and the high-pressure fluid is ejected at high speed, impacting the blades of impeller 4 and driving it to rotate at high speed. Impeller 4 transmits mechanical energy to generator set 5 through the power output shaft, and generator set 5 starts the power generation process, converting mechanical energy into electrical energy. Part of the electrical energy generated by generator set 5 is supplied via cables to lighting, communication, monitoring, and aquaculture aerators on floating island 1. The surplus electrical energy is transmitted to the land power grid via a step-up device and submarine cables for grid-connected power generation. When the pressure in storage tank 3 drops to the lower limit threshold of discharge pressure control valve 32, the valve closes, and the system continues to store high-pressure fluid, achieving a continuous and stable power generation process. The wave-dissipating chamfer 11 at the bottom of floating island 1 diverts water during wave impact, reducing the impact of floating island swaying on power conversion component 2.

[0035] III. Verification of Wave Energy Utilization Performance and Economy: The power generation efficiency and economy of this embodiment can be quantitatively verified through the core formula of wave energy power generation: Wave energy theoretical power calculation formula: P = 0.5 × ρ × g 2 ×T×H 2 / (64π) Where ρ is the density of seawater (1025 kg / m³), g is the gravitational acceleration (9.8 m / s²), T is the wave period, and H is the wave height, this formula is used to estimate the theoretical power of a wave per unit width (1 meter).

[0036] Using the parameters of "a common 2-meter wave height (H) and 8-second wave period (T) in a certain sea area" adapted in this embodiment, the calculation process is as follows: 1. Substitute the fixed parameter: 0.5×1025×(9.8) 2 ×8×(2) 2 / (64π); 2. Calculation results: The theoretical power of a wave per unit width (1 meter) is approximately 7.5 kilowatts.

[0037] If, in this embodiment, a 100-meter-wide rocker-linkage power conversion assembly 2 is arranged on one side of the floating island 1 (i.e., the equipment capture width is 100 meters), then the theoretical total power is approximately 7.5 kW / m × 100 meters = 750 kW. Combined with the system's energy conversion efficiency of approximately 60% (the combined efficiency of piston compression, fluid energy storage, and impeller drive), the actual output power is approximately 450 kW, which can meet the daily electricity needs of approximately 200 households. The economic benefits are significant after the surplus power is connected to the grid.

[0038] Compared with solar and wind power, the core advantages of this embodiment are: (1) Stronger stability: The ocean waves are driven by the moon's gravity and are not affected by day and night or weather. This system continuously outputs electricity 24 hours a day with a fluctuation range of less than 5%; while solar power shuts down at night and wind power output fluctuations can reach more than 30% due to wind speed.

[0039] (2) Higher energy density: The wave energy power (750 kW) with a capture width of 100 meters in this embodiment is equivalent to 3-5 times that of a solar panel of the same area (about 1,000 square meters) or 2-3 times that of a wind farm of the same area (about 5,000 square meters), and it only occupies ocean space and does not consume land resources.

[0040] (3) Better economic efficiency: Based on a theoretical power of 750 kW and 300 days of operation per year, the annual power generation is about 5.4 million kWh. After deducting maintenance costs such as piston and piston cylinder replacement, the cost per kWh can be controlled within 5 cents, which is much lower than solar power (about 0.3 yuan / kWh) and wind power (about 0.2 yuan / kWh).

[0041] Example 2: Push-arm type power conversion component.

[0042] like Figures 5 to 8 As shown, the power generation system based on a floating island in this embodiment consists of a floating island 1, a power conversion component 2 with a "push-arm-piston cylinder" structure, a storage tank 3, an impeller 4, and a generator set 5. The push-arm power conversion component 2 is the core of energy capture. Through the vertical transmission of the push arm, the rising and falling motion of the wave-driven inverted cone-shaped float is directly converted into the reciprocating motion of the piston, generating high-pressure fluid. The storage tank 3 is equipped with a discharge pressure control valve 32 to stabilize the pressure. The impeller 4 and the generator set 5 complete the energy conversion, together forming a compact power generation link adapted to high-frequency waves. The floating island 1 is a wave-dischargeable floating island with a wave-discharge chamfer 11 at the bottom to ensure stable system operation.

[0043] I. Component Preparation and Assembly: Floating Island 1: Similar to Embodiment 1, it adopts a wave-relief structure and has a wave-relief chamfer 11 at the bottom to ensure overall stability; Power conversion assembly 2 includes a push arm 25, a piston cylinder 23, and a float 24. The piston cylinder 23 is fixed to the floating island 1 by a bracket 6, the height of which ensures the piston cylinder 23 is in a safe position above the water surface. The piston cylinder 23 uses a pressure-resistant cylinder body, and the end of its piston 231 is connected to the upper end of the push arm 25. The push arm 25 is a rigid long rod structure that extends vertically, with its lower end passing through the water surface and connecting to the inverted truncated cone-shaped float 24. The working chamber of the piston cylinder 23 also has an inlet 232 and an outlet 233, both equipped with check valves 234. The inlet 232 is connected to an external fluid source. When the fluid is air, the inlet 232 can be suspended in the air. When the fluid is water, the inlet 232 extends underwater through a water pipe 7. The outlet 233 is connected to the storage tank 3 through a pipeline. Storage tank 3, impeller 4, and generator set 5: The structure and layout principles are consistent with those of Embodiment 1. Storage tank 3 is equipped with a discharge pressure control valve 32 and a safety valve 33 for temporarily storing high-pressure fluid and regulating the discharge pressure. Its installation position also follows the principle of "water on top, air on the bottom" to optimize space utilization. Impeller 4 is adapted to fluid impact, and generator set 5 completes the conversion of mechanical energy into electrical energy, possessing the ability to meet the floating island's own power needs and transmit power to the land.

[0044] II. Working Principle: When the waves rise, the buoy 24, shaped like an inverted truncated cone, moves upward under buoyancy, pushing the push arm 25 to move vertically upward. The push arm 25 drives the piston 231 in the piston cylinder 23 to compress the fluid into the cylinder. At this time, the check valve at the inlet 232 is closed, and the check valve at the outlet 233 is open, allowing the high-pressure fluid to be discharged into the storage tank 3 through the outlet 233. When the waves fall, the buoy 24 falls with the water level, pulling the push arm 25 to return to its vertical position. The piston 231 moves out of the cylinder, creating a negative pressure in the working chamber. The check valve at the outlet 233 is closed, and the check valve at the inlet 232 is open, allowing external fluid to be drawn into the working chamber, completing the fluid suction and discharge cycle.

[0045] The subsequent energy release and power generation process is the same as in Example 1: After the pressure inside the storage tank 3 reaches the set upper limit threshold of the discharge pressure control valve 32, the discharge pressure control valve 32 opens, and the high-pressure fluid drives the impeller 4 to rotate, thereby driving the generator set 5 to generate electricity, realizing the conversion of wave energy into electrical energy. The wave-dissipating chamfer 11 at the bottom of the floating island 1 diverts the wave water, reduces the swaying amplitude of the floating island, and ensures the stable transmission of the power conversion component 2.

[0046] III. Verification of Wave Energy Utilization Performance and Economy: This embodiment is adapted to nearshore high-frequency wave scenarios with a wave height of 1.5 meters and a wave period of 6 seconds, and uses the same theoretical wave energy power formula for calculation: Substituting parameters: 0.5×1025×(9.8) 2 ×6×(1.5)2 / (64π), we can deduce that the theoretical power of a wave with a unit width (1 meter) is approximately 3.2 kilowatts.

[0047] If, in this embodiment, an 80-meter-wide push-arm power conversion assembly 2 is arranged around the floating island 1 (equipment capture width 80 meters), the theoretical total power is approximately 3.2 kW / m × 80 m = 256 kW. Combined with an energy conversion efficiency of approximately 65% ​​(the push-arm direct drive structure has lower losses), the actual output power is approximately 166 kW, which can meet the power needs of the floating island's own scientific research equipment, communication base stations, and surrounding small aquaculture areas. The surplus power is transmitted to the near-shore fishing village through low-voltage cables.

[0048] The advantages of this embodiment also align with the core characteristics of wave power generation: 1. Good predictability: Wave parameters of the sea area can be accurately predicted 3-5 days in advance through marine observation data, which facilitates advance scheduling of power allocation (such as reserving power for aerators in aquaculture areas); while the short-term prediction error of solar and wind power often exceeds 20%.

[0049] 2. Significant advantage in energy density: The wave energy power (256 kW) with an 80-meter capture width only requires about 100 square meters of ocean space around the floating island, while solar panels with the same power require about 800 square meters of land and wind power requires about 3,000 square meters of land, making it more suitable for scenarios where nearshore land resources are scarce.

[0050] 3. Controllable cost: The push-arm structure eliminates linkage transmission losses, extends piston cylinder life by 20% compared to the rocker arm-connecting rod type, further reduces annual maintenance costs, and lowers the cost per kilowatt-hour to less than 4.5 cents.

[0051] General compatibility instructions for this utility model: In both embodiments, the selection of the power conversion component 2 can be flexibly determined according to the actual wave environment: in waters with large wave amplitude and low frequency, the rocker arm-linkage type component is preferred, as its transmission structure can more efficiently capture large-stroke wave energy; in waters with high wave frequency and small wave amplitude, the pusher arm type component is more advantageous, as its compact direct-drive structure has a faster response speed. In addition, multiple identical or different types of power conversion components can be arranged around the floating island 1 according to power generation needs, and connected to the same storage tank 3 through a junction pipe to increase the total power generation.

[0052] All designs that adopt the core concept of "power conversion component capturing wave energy - storage tank stabilization - impeller drive power generation" are within the protection scope of this utility model.

[0053] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A power generation system based on a floating island, characterized in that: The system includes a floating island (1), a power conversion assembly (2), a storage tank (3), an impeller (4), and a generator set (5). The power conversion assembly (2) is installed on the floating island (1) and is used to convert the reciprocating motion of waves into high-pressure fluid. The output end of the power conversion assembly (2) is connected to the storage tank (3). The storage tank (3) is provided with a discharge port (31), which is located above the impeller (4) and aligned with its blades. The power output shaft of the impeller (4) is connected to the generator set (5).

2. The power generation system based on a floating island according to claim 1, characterized in that: The power conversion component is at least one set.

3. A power generation system based on a floating island according to claim 1, characterized in that: The power conversion assembly (2) includes a rocker arm (21), a connecting rod (22), and a piston cylinder (23); one end of the rocker arm (21) is hinged to the floating island (1), and the other end is fixed with a float (24); one end of the connecting rod (22) is hinged to the inner side of the rocker arm (21), and the other end of the connecting rod (22) is hinged to the piston (231) of the piston cylinder (23); the working chamber of the piston cylinder (23) is provided with an inlet (232) and an outlet (233), and both the inlet (232) and the outlet (233) are connected to a check valve (234), and the outlet (233) is connected to a storage tank (3).

4. A power generation system based on a floating island according to claim 1, characterized in that: The power conversion assembly (2) includes a push arm (25) and a piston cylinder (23). The piston cylinder (23) is fixed above the water surface by a bracket (6). The piston (231) of the piston cylinder (23) is connected to a push arm (25), and a float (24) is connected to the bottom of the push arm (25).

5. A power generation system based on a floating island according to claim 3 or 4, characterized in that: The float (24) is in the shape of an inverted frustum.

6. A power generation system based on a floating island according to claim 1, characterized in that: The storage tank (3) is equipped with a discharge pressure control valve (32) and a safety valve (33).

7. A power generation system based on a floating island according to claim 1, characterized in that: The floating island (1) is a detachable floating island.

8. A power generation system based on a floating island according to claim 1, characterized in that: The bottom of the floating island (1) is provided with a wave-relief chamfer (11).

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