A hull and a self-propelled three-body wave energy power generation platform

Abstract

The present invention discloses a hull and a self-propelled three-body wave energy power generation platform. The hull includes a main hull section for serving as a buoyancy chamber; auxiliary hull sections for serving as auxiliary buoyancy chambers, with a thruster installed at the bottom; there are two of the auxiliary hull sections, which are installed in parallel facing each other on both sides of the rear of the main hull section; and a deck for connecting the main hull section and the two auxiliary hull sections so that a hull is formed among the four. Since the hull adopts two auxiliary hull sections to install the thruster, the thruster can play its role with the highest efficiency. At the same time, the two hull sections can compensate for the unbalanced buoyancy of the main hull section, and can also increase the deck area to expand the space for production activities. The volume of the middle hull section is much larger than that of the two side hull sections, mainly undertaking the task of wave energy conversion. The three hull sections share a main deck and the superstructure, and compared with a single-body wave energy power generation ship, it has the advantages of a large deck space and good stability performance.

Description

Technical Field

[0001] The present invention relates to the technical field of wave energy power generation, and particularly to a hull and a self-propelled three-body wave energy power generation platform. Background Art

[0002] Wave energy resources are abundant, widely distributed, and have great potential for development and utilization. Although there are many current wave energy utilization technologies, the progress in this field is difficult and costly, and the commercialization process is slow.

[0003] There are many types of wave energy utilization technologies, and the floating technology is the mainstream of development. Most floating technologies can be classified into three categories: oscillating water column technology, overtopping technology, and oscillating buoy technology. The floating oscillating buoy technology uses waves to push a floating body to translate or rotate relative to another floating body (support platform) to convert energy. It is the mainstream of the current wave energy technology development. The devices developed based on this technology must be double (multi)-floating bodies and are submerged or semi-submerged in seawater. This feature means low material utilization rate (double or multi-floating bodies), inevitable problems of interaction between floating bodies, great influence of marine organism attachment, long deployment time (floating state adjustment requires time and equipment), easy occurrence of mechanical failures, and difficult maintenance. Its cost performance is limited by the technical route. The floating overtopping technology uses the climbing action of waves to convert wave energy into the potential energy of seawater. The characteristics of the devices developed based on this technology are single floating body (carrying platform). The device has to bear the weight of the conversion carrier (seawater). Therefore, its structure is large-scale, with high strength requirements. Under the combined action of wind, waves, and currents, the mooring system is complex and the investment is large. The water turbine is in contact with seawater and is greatly affected by marine organism attachment, so its development is slow. The floating oscillating water column technology sets a cavity in the structure. The cavity forms are straight pipes, bent pipes, or inclined pipes, etc. One end of the pipe is in contact with seawater, and the other end is installed with an air turbine and a generator after contraction. There is an air chamber between the air turbine and the seawater. Wave energy is converted into pneumatic energy in the air chamber through the reciprocating motion of the water column in the cavity, and then the pneumatic energy is converted into electrical energy through the air turbine and the generator. Its characteristics are simple structure, no problem of structure collision, strong survivability, the air turbine and the generator are located above the water surface and are not affected by seawater and marine organisms, and it is convenient to maintain. There are various forms of the floating oscillating water column technology. Among them, there is a form of rear bent pipe. With the efforts of the patent application team, the small-scale power generation prototype was tested in a pool by a third party (National Ocean Technology Center). The test results show that the wave-to-electricity conversion efficiency reaches up to 50.73% under regular wave battery load, and the highest average wave-to-electricity efficiency reaches 24.5% under random wave battery load, reaching the international leading level.

[0004] At present, the reasons for the slow development of wave energy utilization technology are manifold, mainly manifested in the following aspects: 1. The marine environment is harsh. The supporting structure is easily damaged by large wave forces, the safety is uncontrollable, and the lifespan of the entire system is short; 2. The conversion efficiency is low and the power generation is small; 3. The current mainstream technology adopts a multi-float scheme, which is costly; 4. The current technology solutions require large marine engineering equipment (tugboats, crane ships, etc.) for deployment and recovery operations, with high costs; 5. When the subsystems malfunction, due to the marine environment, the system cannot be naturally approached for timely maintenance, which may lead to the collapse of the entire system, and the holding cost is high.

[0005] In order to break through many dilemmas such as high construction and marine engineering costs, low conversion efficiency and safety, difficult maintenance, and limited application scenarios, people have invented self-propelled wave energy power generation systems using single-float, double-float, and multi-float methods. However, the current inventions have the following deficiencies:

[0006] 1. The single-float wave energy power generation system with self-propulsion uses the oscillating water column technology to generate wave energy. In order to achieve efficient conversion, the float has a special shape. The propulsion mechanism generally adopts a dual-propeller method. Due to the special shape limitation of the float for efficient wave energy conversion, the installation of its propellers can only be close to the float and installed on both sides or the bottom of the float. When entering the port and berthing, it may collide with the seabed, other hulls, or the dock, and safety accidents are likely to occur. Moreover, the propulsion efficiency of the propellers is affected by the float shape and is not high; The deck area and cabin volume of the self-propelled power generation system with a single-body structure are small, and production activities are restricted; The stability of the self-propelled power generation system with a single-body structure is poor;

[0007] 2. The double-float wave energy power generation system with self-propulsion also uses the oscillating water column technology to generate wave energy. Similarly, in order to achieve efficient wave energy conversion, its shape also has special requirements. The propulsion mechanism generally also adopts a dual-propeller method. The self-propelled wave energy power generation system with a double-body structure overcomes the shortcomings of small deck area and cabin volume and poor ship stability in the single-body technology form. However, the installation of the propellers can only be close to the float and installed on both sides or the bottom of the float or the middle and lower part of the float tail. The propulsion efficiency of the propellers is greatly affected by the float;

[0008] 3. The multi-float wave energy power generation system with self-propulsion has a technical form in which multiple groups of floats are symmetrically arranged on both sides of a hull. These floats are used to absorb wave energy, that is, the oscillating float technology is used to generate wave energy. When the ship is sailing, the floats are retracted from the water surface and do not form resistance to navigation. When berthing to absorb wave energy, the floats are put into the water body, and the floats absorb wave energy. This technical form requires multiple sets of lifting mechanisms, with high costs. The floats are greatly affected by the hull and the floats, and the wave energy conversion efficiency is low. This technical form has a small deck area and cabin volume, and production activities are restricted, and the stability of the ship is also poor. Summary of the Invention

[0009] An object of the present invention is to overcome at least one of the technical problems existing in the above-mentioned background art, and to provide a hull and a self-propelled three-body wave energy power generation platform.

[0010] To achieve the above object, the technical solution of the present invention is as follows:

[0011] In a first aspect, an embodiment of the present invention provides a hull for a self-propelled three-body wave energy power generation platform, and the hull includes:

[0012] A main sheet body for serving as a buoyancy chamber;

[0013] An auxiliary sheet body for serving as an auxiliary buoyancy chamber, and a thruster is installed at the bottom; there are two auxiliary sheet bodies, which are installed in parallel facing each other on both sides of the rear part of the main sheet body;

[0014] A deck for connecting the main sheet body and the two auxiliary sheet bodies so that a hull is formed among the four.

[0015] Further, a superstructure is provided on the deck.

[0016] Further, the hull further includes an anchor, which is respectively installed at the tail of the auxiliary sheet body and the front of the main sheet body.

[0017] In a second aspect, an embodiment of the present invention provides a self-propelled three-body wave energy power generation platform, including a hull and a pneumatic wave energy power generation device installed on the hull;

[0018] The hull includes:

[0019] A main sheet body for serving as a buoyancy chamber;

[0020] An auxiliary sheet body for serving as an auxiliary buoyancy chamber, and a thruster is installed at the bottom; there are two auxiliary sheet bodies, which are installed in parallel facing each other on both sides of the rear part of the main sheet body;

[0021] A deck for connecting the main sheet body and the two auxiliary sheet bodies so that a hull is formed among the four.

[0022] Further, the pneumatic wave energy power generation device includes a horizontal pipe, a vertical cavity, an air turbine and a generator;

[0023] The vertical cavity includes an oscillating water column, an air chamber and an air inlet and outlet hole;

[0024] The air chamber is located above the oscillating water column in the vertical cavity, the air inlet and outlet hole is located at the top of the air chamber, and is formed by the contraction of the upper part of the vertical cavity. An air turbine and a generator are installed on the air inlet and outlet hole.

[0025] Further, the cross-section of the horizontal pipe 8 is a "concave" trumpet-shaped opening, formed by attaching a triangular pyramid of the same length as the pipe to an equilateral pentagon pipe. The sides of the pentagon are parallel to each other, and the inner angle between the two bottom surfaces is 120° ± 30°. One side of the triangular pyramid is attached to the top surface of the pentagon, and the included angle between the other two sides is 120° ± 30°. Finally, the shape of the vertical cross-section of the horizontal pipe gradually changes from a hexagon to an octagon, and the final port is a pentagon. The area of the pentagon at the pipe port is larger than the area of the hexagon at the port.

[0026] Further, the horizontal cross-section of the vertical cavity is a quadrilateral, and the cross-sectional area of the hexagonal cross-section of the horizontal pipe and the horizontal cross-section of the vertical cavity are equal or unequal.

[0027] Further, the self-propelled trimaran wave energy power generation platform further includes moorings, which are respectively installed at the tail of the auxiliary hull and the front of the main hull.

[0028] Further, the self-propelled trimaran wave energy power generation platform further includes a gate; when collecting wave energy, the 3 moorings are arranged radially, the tail of the power generation platform faces the incident wave direction, the gate is closed, the horizontal pipe and the vertical cavity are connected to form a bent pipe, and the wave action causes the water column to move in the air chamber, driving the air movement in the air chamber. The moving air will drive the air turbine and the generator to output electric energy, and the wave energy is converted into electric energy; when reducing the conversion efficiency, the gate is opened, and part of the wave energy passes through the horizontal pipe through the device; when moving, the 3 moorings are retracted, the gate is opened, and the power generation platform sails under the action of the thruster.

[0029] Further, a superstructure is provided on the deck.

[0030] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0031] The hull provided in this embodiment can maximize the efficiency of the thruster by using two auxiliary hulls to install thrusters. At the same time, the two hulls can compensate for the unbalanced buoyancy of the main hull structure, and can increase the deck area to expand the space for production activities. The volume of the middle hull is much larger than that of the two side hulls, and it mainly undertakes the task of wave energy conversion. The three hulls share a main deck and a superstructure, and compared with a single-hull wave energy power generation ship, it has the advantages of a large deck space and good stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a schematic structural diagram of the hull provided by the embodiment of the present invention;

[0033] Figure 2 is a schematic structural diagram of the pneumatic wave energy power generation device provided by the embodiment of the present invention;

[0034] Figure 3 isFigure 2 Schematic structure of A - D;

[0035] Figure 4 It is a schematic diagram of the composition of the self - propelled three - body wave energy power generation platform provided by the embodiment of the present invention;

[0036] In the figure: 1 - main hull; 2 - auxiliary hull; 3 - deck; 4 - superstructure; 5 - mooring; 6 - thruster; 7 - equipment; 8 - horizontal pipe; 9 - vertical cavity; 10 - oscillating water column; 11 - air chamber; 12 - air inlet and outlet; 13 - air turbine; 14 - generator; 15 - gate; 16 - gate lifting rod; 17 - lifting and rotating disc. Specific embodiments

[0037] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installation" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a signal connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be said that the interiors of two components are connected. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations. The technical solutions of the present invention will be further described below with reference to the drawings and embodiments.

[0038] Embodiment 1:

[0039] Refer to Figure 1 As shown, the hull provided in this embodiment mainly includes a main hull 1, two auxiliary hulls 2, a deck 3, a superstructure 4, three mooring systems 5, and two thrusters 6. Among them, the superstructure 4 is provided with passenger cabins, a cockpit, living facilities, etc. The deck 3 connects the main hull 1 and the auxiliary hulls 2. That is to say, the three hulls share a main deck and an upper structure. Compared with a single - hull ship, it has the advantages of a large deck space and good stability. The main hull 1 is a buoyancy tank, mainly undertaking the task of wave energy conversion. Its volume is much larger than that of the two side hulls. It is provided with equipment 7 such as a power system and an energy storage system. The two auxiliary hulls 2 are small buoyancy tanks with the same shape. Each is equipped with a thruster 6 at the bottom and is arranged in parallel on both sides of the rear of the main hull. The two side hulls provide good stability for the three - body wave energy power generation system, can improve the wave - resistance performance of the power generation ship in high sea conditions, and the existence of the two side hulls can balance the buoyancy lost by the cavity provided for the oscillating water column of the following pneumatic wave energy power generation device, reducing the counterweight.

[0040] It can be seen that the hull provided in this embodiment can maximize the efficiency of the thruster by using two auxiliary sheets to install the thruster. At the same time, the two sheets can compensate for the buoyancy imbalance of the main sheet structure, and can increase the deck area to expand the space for production activities. The volume of the middle sheet is much larger than that of the two side sheets, and it mainly undertakes the task of wave energy conversion. The three sheets share a main deck and superstructure, and compared with a single-hull wave energy power generation ship, it has the advantages of a large deck space and good stability.

[0041] In addition, the above-mentioned hull also includes 3 sets of mooring systems 5, which are respectively installed at the tail of the auxiliary sheet 2 and the front of the main sheet 1.

[0042] Embodiment 2:

[0043] Refer to Figures 2 - 4 As shown, the self-propelled trimaran wave energy power generation platform provided in this embodiment ( Figure 4 ) is mainly composed of the hull ( Figure 1 ) described in Embodiment 1 and a pneumatic wave energy power generation device ( Figure 2 ) assembled on the hull.

[0044] As Figure 2 shown, the pneumatic wave energy power generation device includes a horizontal pipe 8, a vertical cavity 9, an air turbine 13 and a generator 14.

[0045] Among them, the vertical cavity 9 includes an oscillating water column 10, an air chamber 11 and an air hole 12; the air chamber 11 is located above the oscillating water column 10 in the vertical cavity 9, and the air inlet and outlet hole 12 is located at the top of the air chamber 11, which is formed by the contraction of the upper part of the vertical cavity. An air turbine 13 and a generator 14 are installed on the air inlet and outlet hole 12.

[0046] As Figure 2 and 3 shown, the length of the horizontal pipe 8 is from Figure 2From the surface where the hexagon A is located to the surface where the pentagon C is located, the vertical cross-section of the horizontal pipe 8 is a "concave" trumpet-shaped opening, which is formed by attaching an isosceles pentagon C pipe to a triangular pyramid with the same length as the pipe. The sides of the pentagon C are parallel to each other, and the inner angle between the two bottom surfaces of the pentagon C is 120° ± 30°. One side of the triangular pyramid is attached to the top surface of the pentagon, and the included angle between the other two sides is 120° ± 30°. Finally, the shape of the vertical cross-section of the horizontal pipe gradually changes from the hexagon A to the octagon B, and the final port is the pentagon C. The area of the pentagon C at the pipe port is larger than the area of the hexagon A at the port. The horizontal cross-section of the vertical cavity is the quadrilateral D, and the area of the hexagon A of the horizontal pipe is greater than or equal to the area of the quadrilateral D of the horizontal cross-section of the vertical cavity. This kind of horizontal pipe has a "concave" hexagon at the front and finally transitions to a pentagon, which can make the resistance of the moving water at the front of the platform smaller, resulting in a larger movement amplitude at the front. On the contrary, the resistance of the moving water at the tail is larger, so the movement amplitude is smaller, which will increase the rocking amplitude of the platform and the movement amplitude of the water column in the vertical pipe, increase the pneumatic energy, and thus improve the conversion efficiency. According to the principle of fluid mechanics, the trumpet-shaped structure of the horizontal pipe will also increase the movement amplitude and movement speed of the water column liquid level in the vertical pipe, thereby increasing the pneumatic energy and improving the energy conversion efficiency from waves to gas.

[0047] In addition, the self-propelled three-body wave energy power generation platform further includes a gate 15, which is driven by a gate lifting rod 16 and a lifting rotary disk 17 to move. When it is necessary to efficiently collect wave energy, the three moorings 5 are arranged radially, so that the tail of the power generation platform faces the incident wave direction, the gate is closed, the horizontal pipe 8 and the vertical cavity 9 are connected to form a backward-bent pipe, and the wave causes the water column to move in the air chamber 11, driving the air in the air chamber 11 to move. The moving air will drive the air turbine 13 and the generator 14 to output electric energy, and the wave energy is converted into electric energy. When it is necessary to reduce the conversion efficiency, the gate 15 is opened, and part of the wave energy passes through the horizontal pipe 8 and transmits through the power generation device. When it is necessary to move, the three mooring systems 5 are retracted, the gate 15 is opened, and the power generation platform sails under the action of the thruster 6.

[0048] In summary, for the hull of the self-propelled trimaran wave energy power generation platform provided in this embodiment, two auxiliary hulls are installed with thrusters, which can maximize the role of the thrusters. At the same time, the two hulls can compensate for the unbalanced buoyancy of the main hull structure, and can increase the deck area to expand the space for production activities. The volume of the middle hull is much larger than that of the two side hulls, mainly undertaking the wave energy conversion task. The three hulls share a main deck and superstructure, which has the advantages of large deck space and good stability performance compared with the single-hull wave energy power generation ship. When the device based on this technology is in the wave power generation state, the horizontal pipe and the vertical cavity form a bent pipe wave energy power generation device with high conversion efficiency when the gate is closed; when in the navigation state, the through horizontal pipe reduces the resistance during self-navigation of the power generation platform, reduces the energy loss during navigation, saves energy and protects the environment, laying a foundation for the low-cost, high-efficiency and wide-field utilization of wave energy.

[0049] The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose is to enable those of ordinary skill in the art to understand the content of the present invention and implement it accordingly, and it should not be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the essence of the content of the present invention should be covered within the protection scope of the present invention.

Claims

1. A self-propelled three-body wave energy power generation platform, characterized in that It includes a hull and a pneumatic wave energy power generation device installed on the hull; The hull includes: A main sheet body, which is used as a buoyancy chamber; Auxiliary sheet bodies, which are used as auxiliary buoyancy chambers, and a thruster is installed at the bottom; there are two auxiliary sheet bodies, which are installed in parallel facing each other on both sides of the rear of the main sheet body; A deck, which is used to connect the main sheet body and the two auxiliary sheet bodies so that a hull is formed among the four; The pneumatic wave energy power generation device includes a horizontal pipe, the cross-section of the horizontal pipe is a "concave" trumpet-shaped opening, which is formed by pasting an equilateral pentagon pipe with a triangular pyramid of the same length as the pipe. The sides of the pentagon are parallel to each other, and the inner angle between the two bottom surfaces is 120°±30°. One side of the triangular pyramid is pasted on the top surface of the pentagon, and the included angle between the other two sides is 120°±30°. Finally, the shape of the vertical cross-section of the horizontal pipe gradually changes from a hexagon to an octagon, and the final port is a pentagon. The area of the pentagon at the pipe port is larger than the area of the hexagon at the port; A superstructure is arranged on the deck.

2. The self-propelled three-body wave energy power generation platform according to claim 1, characterized in that, The pneumatic wave energy power generation device also includes a vertical cavity, an air turbine and a generator; The vertical cavity includes an oscillating water column, an air chamber and an air inlet and outlet; The air chamber is located above the oscillating water column in the vertical cavity, and the air inlet and outlet is located at the top of the air chamber, which is formed by the upper part of the vertical cavity shrinking. An air turbine and a generator are installed on the air inlet and outlet.

3. The self-propelled three-body wave energy power generation platform according to claim 2, wherein, The horizontal cross-section of the vertical cavity is a quadrilateral, and the cross-sectional area of the hexagon of the horizontal pipe and the horizontal cross-sectional area of the vertical cavity are equal or not equal.

4. The self-propelled trimaran wave energy power generation platform according to claim 1, wherein, It also includes moorings, which are respectively installed at the tail of the auxiliary sheet body and the front of the main sheet body.

5. The self-propelled trimaran wave energy power generation platform according to claim 4, wherein, It also includes a gate; when wave energy needs to be collected, the 3 moorings are arranged radially, the tail of the power generation platform faces the incident wave direction, the gate is closed, the horizontal pipe and the vertical cavity are connected to form a rear-bent pipe, and the wave action causes the water column to move in the air chamber, driving the air movement in the air chamber. The moving air will drive the air turbine and the generator to output electric energy, and the wave energy is converted into electric energy; when the conversion efficiency needs to be reduced, the gate is opened, and part of the wave energy passes through the horizontal pipe and transmits through the device; When it needs to move, the 3 moorings are retracted, the gate is opened, and the power generation platform sails under the action of the thruster.

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