Floating double-chamber oscillating water column wave energy power generation device with an external hollow structure

Abstract

The present invention belongs to the field of new energy technology utilization, and provides a floating double-chamber oscillating water column wave energy power generation device equipped with an external open structure, including an open structure, an oscillating water column system, and a mooring and fixing system. The present invention effectively combines a floating double-chamber oscillating water column wave energy conversion device and an open structure, which can not only improve the energy conversion efficiency of the device and broaden the effective frequency band width of the device; at the same time, the open structure can also dissipate a certain amount of energy from the waves, especially short waves, reduce the wave loads received by the device, and improve the survivability of the device.

Description

Technical Field

[0001] The present invention relates to a floating double - chamber oscillating water column wave energy conversion device with an external open - structure, belonging to the field of new energy technology utilization. Background Art

[0002] The vast ocean has abundant renewable energy. As one of the renewable energy sources of ocean energy, wave energy has huge reserves. Developing and utilizing wave energy resources can effectively alleviate the shortage of traditional fossil energy and the environmental pollution problems caused by the use of fossil energy. Therefore, wave energy power generation has broad application prospects. Wave energy power generation devices are mainly divided into three types according to the working principle: oscillating water column type, over - topping type, and oscillating body type. Among them, the oscillating water column wave energy device is widely studied and applied at present because its air turbine does not directly contact seawater, is not easily corroded, and the device has the advantages of simple structure and high reliability. Generally, three energy conversions are required from wave energy to electrical energy: that is, when the wave enters the air chamber to form an oscillating water column, it forces the air in the air chamber to form a reciprocating air flow at the air hole, converting wave energy into air kinetic energy and completing the first energy conversion; the air flow drives the air turbine to rotate, converting air kinetic energy into the mechanical energy of the turbine and completing the second energy conversion; finally, the turbine drives the generator to work, converting mechanical energy into electrical energy and completing the third energy conversion.

[0003] Early oscillating water column wave energy power generation devices were mostly shore - based fixed - type structures. Due to the relatively low wave energy density near the shore, the power generation power of the device was thus limited to a certain extent, which was not conducive to the large - scale commercialization of the device. The floating oscillating water column wave energy device can overcome the above problems and can develop and utilize the wave energy in the deep - sea area with richer wave energy resources. The oscillating water column wave energy device has a larger energy conversion efficiency when the wave frequency is close to the device frequency. Therefore, in order to improve the energy conversion efficiency of the device and broaden the effective frequency band width of the device, the present invention adopts an oscillating water column wave energy device with a double - chamber structure.

[0004] When the wave energy device is working, it needs to withstand the action of various environmental loads such as waves, ocean currents, and winds, and the survival environment is harsh. Especially under the action of short - waves, due to its weak transmission ability, a large reflection will be generated in front of the device, which will not only lead to a low energy conversion efficiency of the device, but also generate a large wave load, threatening the safe operation of the device. The open - structure has a good wave energy dissipation effect and is widely used in ocean engineering structures that require wave dissipation. Therefore, the present invention proposes to add an open - structure around the double - chamber oscillating water column wave energy device, which can not only improve the energy conversion efficiency of the device, broaden the effective frequency band width of the device, but also dissipate a certain amount of wave energy, especially short - waves, reduce the wave load received by the device, and improve the survival ability of the device. Summary of the Invention

[0005] In view of the above existing problems, the present invention designs a floating double-chamber oscillating water column wave energy conversion device with an external open structure. The double-chamber structure can capture waves with a wider frequency range and improve the power generation efficiency of the device; the external open structure can effectively reduce the wave loads on the conversion device, thereby enhancing the survival ability of the device.

[0006] The technical solution of the present invention:

[0007] A floating double-chamber oscillating water column wave energy power generation device with an external open structure, comprising an open structure, a double-chamber oscillating water column system, and an anchoring and fixing system;

[0008] The open structure 1 is a circular cylinder structure fixed to the outside of the outer circular cylinder 3, with its inner radius being the same as the outer radius of the outer circular cylinder, and circular holes are evenly distributed on its surface. The size and distribution density of the holes are determined according to the actual sea conditions in the target sea area;

[0009] The double-chamber oscillating water column system mainly consists of an outer hemispherical ring 2, an outer circular cylinder 3, an inner circular cylinder 4, an inner hemispherical ring 5, an inner cylinder 6, an outer air chamber 7, an inner air chamber 8, a cross support beam 9, a first air hole channel 11, a first turbine power generation system 12, a second air hole channel 13, and a second turbine power generation system 14; among them, the outer air chamber 7 is a cavity jointly formed by the outer hemispherical ring 2, the outer circular cylinder 3, the inner circular cylinder 4, and the inner hemispherical ring 5, and the outer circular cylinder 3 is connected to the outer hemispherical ring 2; the inner air chamber 8 is a cavity formed by the inner circular cylinder 4, the inner hemispherical ring 5, and the inner cylinder 6, and the inner circular cylinder 4 is connected to the inner hemispherical ring 5; the top of the inner cylinder 6 is located inside the inner air chamber 8 and has a distance from the inner hemispherical ring 5 above the water surface; the cross support beam 9 is fixed to the top of the inner cylinder 6 for supporting and fixing the outer cylindrical ring 3 and the inner circular cylinder 4; the top of the outer hemispherical ring 2 is provided with a first air hole channel 11 and a second air hole channel 13, and the two air hole channels correspond to the inner air chamber 8 and the outer air chamber 7 respectively. The first turbine power generation system 12 is located in the first air hole channel 11, and the second turbine power generation system 14 is located in the second air hole channel 13;

[0010] The anchoring and fixing system consists of multiple anchor chains 10. One end of the anchor chain 10 is connected to the inner cylinder 6, and the other end is fixed to the seabed.

[0011] The beneficial effects of the present invention:

[0012] Adopting a floating structure, it can be applied to the deep sea area with a greater wave energy density.

[0013] Adopting an oscillating water column system with a double-chamber structure can capture waves with a wider frequency band and improve the power generation efficiency of the device.

[0014] Adopting an external open structure can reduce the wave load on the device, thereby improving the survivability of the device, and further ensuring that the oscillating water column wave energy conversion device system can operate stably and efficiently in the long term. Description of the Drawings

[0015] Figure 1 This is a schematic structural diagram of the floating double-chamber oscillating water column wave energy conversion device with an external open structure according to the present invention.

[0016] Figure 2 It is a schematic structural diagram of an outer circular cylinder, an inner circular cylinder and an inner cylinder.

[0017] Figure 3 It is a schematic structural diagram of an outer hemispherical ring.

[0018] Figure 4 It is a schematic diagram of the open structure.

[0019] Figure 5 It is a horizontal cross-sectional view of the structures of the outer circular cylinder, the inner circular cylinder, the inner cylinder and the cross support beam.

[0020] In the figure: 1 open structure; 2 outer hemispherical ring; 3 outer circular cylinder; 4 inner circular cylinder; 5 inner hemispherical ring; 6 inner cylinder; 7 outer air chamber; 8 inner air chamber; 9 cross support beam; 10 anchor chain; 11 first air hole channel; 12 first turbine power generation system; 13 second air hole channel; 14 second turbine power generation system. Detailed Embodiment

[0021] The following further describes the detailed embodiments of the present invention in conjunction with the drawings and technical solutions.

[0022] As Figure 1 : A floating double-chamber oscillating water column wave energy conversion device equipped with an external open structure, including an open structure, a double-chamber oscillating water column system and an anchoring and fixing system. The main component structures include an open structure 1, an outer hemispherical ring 2, an outer circular cylinder 3, an inner circular cylinder 4, an inner hemispherical ring 5, an inner cylinder 6, an outer air chamber 7, an inner air chamber 8, a cross support beam 9, an anchor chain 10, a first air hole channel 11, a first turbine power generation system 12, a second air hole channel 13, and a second turbine power generation system 14.

[0023] The open structure 1 is located on the outermost side of the device. The inner surface is closely attached to the outer surface of the outer circular cylinder 3. The top surface is at the same height as the outer circular cylinder 3, and the bottom surface is lower than the outer circular cylinder 3, which can dissipate a certain amount of energy from short waves and reduce the wave load on the device.

[0024] In the described oscillation system, the axes of the outer hemispherical ring body 2, the outer circular cylindrical body 3, the inner circular cylindrical body 4, the inner hemispherical ring body 5, and the inner cylindrical body 6 coincide. Among them, the lower end of the outer hemispherical ring body 2 is open, and its inner and outer radii are equal to those of the outer circular cylindrical body 3. Their axes coincide and they are tightly combined up and down. At the center position of the top of the outer hemispherical ring body 2, there are two cylindrical first air hole channels 11 and air channels 213. The radii of the first air hole channel 11 and the second air hole channel 13 are determined according to the actual sea conditions. The first air hole channel 11 is equipped with a first turbine power generation system 12, and the second air hole channel 13 is equipped with a second turbine power generation system 14. Both the first turbine power generation system 12 and the second turbine power generation system 14 can rotate under the action of bidirectional airflows, enabling the device to generate electricity during both the air intake and exhaust processes. The outer air chamber 7 and the inner air chamber 8 are respectively equipped with turbine power generation systems. It is designed that the inner hemispherical ring body 5 separates the outer air chamber 7 and the inner air chamber 8. The inner hemispherical ring body 5 is located inside the outer hemispherical ring body 2, and their axes coincide. The lower part of the inner hemispherical ring body 5 is open and fits with the circular cylindrical body 4 with the same inner and outer radii up and down, and their axes coincide. There is a cylindrical channel left at the top of the inner hemispherical ring body 5 connected to the first air hole channel 11. The outer air chamber 7 is connected to the second air hole channel 13 and the second turbine power generation system 14. The inner air chamber 8 is connected to the first air hole channel 11 and the first turbine power generation system 12. The inner cylindrical body 6 is composed of two cylindrical bodies with different radii. The axes of the two cylindrical bodies coincide and are located at the center of the structure. The upper cylinder has a smaller radius and the lower cylinder has a larger radius, providing buoyancy for the entire device. The top surface height of the upper cylinder is equal to that of the inner circular cylindrical body 4, and the bottom surface is lower than the inner circular cylindrical body 4. At the top of the upper cylinder, it is connected to the inner circular cylindrical body 4 and the outer circular cylindrical body 3 through a cross support beam 9. The cross support beam 9 penetrates the upper cylinder and the inner circular cylindrical body 4 and is connected to the outer circular cylindrical body 2 to support and fix the structure. The radius of the lower cylinder is larger than that of the upper cylinder but smaller than that of the inner circular cylindrical body 4. At the bottom of the lower cylinder, it is fixed to the seabed through multiple anchor chains 10.

[0025] During use, the device is fixed by anchor chains. Under the action of ocean waves, the water columns in the two air chambers oscillate up and down to perform piston motion, forcing external air to flow in and out of the air chambers through their respective ventilation holes, driving the turbine power generation system to work, thereby generating electricity. Moreover, when the air flows in and out of the air chambers, the turbines can all generate electricity.

[0026] In addition to the above embodiments, the present invention can also have other embodiments. All technical solutions formed by equivalent substitution or equivalent means fall within the protection scope required by the present invention.

Claims

1. A floating double-chamber oscillating water column wave energy power generation device with an external open structure, characterized in that, the floating double-chamber oscillating water column wave energy power generation device with an external open structure comprises an open structure, a double-chamber oscillating water column system and an anchoring and fixing system; The open structure (1) is a circular cylindrical structure fixed to the outside of the outer circular cylinder (3), with its inner radius being the same as the outer radius of the outer circular cylinder, and circular holes are evenly distributed on its surface, and the size and distribution density of the holes are determined according to the actual sea conditions of the target sea area; The double-chamber oscillating water column system mainly consists of an outer hemispherical ring body (2), an outer circular cylinder (3), an inner circular cylinder (4), an inner hemispherical ring body (5), an inner cylinder (6), an outer air chamber (7), an inner air chamber (8), a cross support beam (9), a first air hole channel (11), a first turbine power generation system (12), a second air hole channel (13) and a second turbine power generation system (14); among them, the outer air chamber (7) is a cavity jointly formed by the outer hemispherical ring body (2), the outer circular cylinder (3), the inner circular cylinder (4) and the inner hemispherical ring body (5), and the outer circular cylinder (3) is connected to the outer hemispherical ring body (2); the inner air chamber (8) is a cavity formed by the inner circular cylinder (4), the inner hemispherical ring body (5) and the inner cylinder (6), and the inner circular cylinder (4) is connected to the inner hemispherical ring body (5); the top of the inner cylinder (6) is located inside the inner air chamber (8) and has a distance from the inner hemispherical ring body (5) above the water surface; the cross support beam (9) is fixed to the top of the inner cylinder (6) and is used to support and fix the outer cylindrical ring body (3) and the inner circular cylinder (4); the top of the outer hemispherical ring body (2) is provided with a first air hole channel (11) and a second air hole channel (13), the two air hole channels respectively correspond to the inner air chamber (8) and the outer air chamber (7), the first turbine power generation system (12) is located in the first air hole channel (11), and the second turbine power generation system (14) is located in the second air hole channel (13); The anchoring and fixing system consists of multiple anchor chains (10), one end of the anchor chain (10) is connected to the inner cylinder (6), and the other end is fixed to the seabed.

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