A back-bent pipe wave energy power generation ship body

Abstract

The present application relates to a kind of back elbow pipe wave energy generation hull, including two ends open back elbow pipe, the back elbow pipe includes horizontal pipe and elbow pipe;The air chamber is arranged on the upper end of elbow pipe;The buoyancy cabin is arranged in the upper portion of horizontal pipe;Symmetrical two groups of wing plates are located on the two sides of ship respectively, and the lower surface of the wing plate presents smooth curved surface extending downward from bow to stern direction;The present application has compact spatial topology structure, has greater capture width ratio, ensures that wave energy generation device keeps larger pitch movement response under the action of sea state in working sea area, so that the device always keeps high power generation efficiency state.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of back elbow pipe wave energy generation hull, belong to wave energy generation technical field. BACKGROUND

[0002] Due to the huge storage of ocean wave energy resources, the development prospect is broad, and in recent years, the use of wave energy generation has been widely concerned by researchers. The working principle of common wave energy generation device mainly includes oscillating float type, oscillating water column type and overtopping wave type.

[0003] Among them, the back elbow pipe technology is a kind of mainstream technology of oscillating water column type in recent years, with good capture width ratio, can capture wave energy under the action of wave, obtain mechanical energy by using its own oscillation movement, and convert wave energy into electric energy by using pipeline, air chamber, turbine and the like.

[0004] And in order to better produce larger amplitude pitch motion response, the hull needs to be improved to improve the power generation efficiency of the device, while not hindering the attitude stability of the wave energy generation device. SUMMARY

[0005] The purpose of the present application is to provide a kind of back elbow pipe wave energy generation hull to solve the problems raised in the above background.

[0006] The technical scheme of the present application is as follows:

[0007] A kind of back elbow pipe wave energy generation hull, comprising:

[0008] The back elbow pipe with two open ends, the back elbow pipe includes horizontal pipeline and elbow pipeline;

[0009] Air chamber, the air chamber is arranged on the upper end of the elbow pipeline;

[0010] Buoyancy cabin, the buoyancy cabin is arranged on the upper part of the horizontal pipeline;

[0011] Wing plate, two groups of symmetrical wing plates are respectively located on both sides of the ship body, and the lower surface of the wing plate is a smooth curved surface extending downward from the bow to the stern direction.

[0012] Preferably, the cross-sectional shape of the horizontal pipeline is "gyroscopic", which can effectively reduce the water resistance when oscillating, increase the motion amplitude, and improve the wave capture performance of the power generation device;The transition surface between the horizontal pipeline inner flow channel and the vertical air chamber is a streamline curved surface, so that the water column height in the vertical air chamber will not be reduced due to the energy loss of wave in the back elbow pipe from horizontal to vertical direction during movement, to ensure the power generation efficiency of the wave energy generation device.

[0013] Preferably, the inlet cross-sectional area of the curved pipe is larger than the horizontal cross-sectional area of the air chamber, so that the fluid flow speed in the air chamber is greater than the fluid flow speed in the horizontal pipe, improving the aerodynamic efficiency.

[0014] Preferably, the bottom wall of the horizontal pipe is provided with a single-point mooring system near the bow front.

[0015] Preferably, the wing plate is hollow inside.

[0016] Preferably, the smooth curved surface of the lower surface of the wing plate is arc-shaped or quarter-period regular wave-shaped.

[0017] Preferably, the wing plate is arranged at the stern position and extends from the middle of the hull to the stern in the longitudinal direction. If the length of the wing plate in the length direction is too long to provide buoyancy in the length direction to suppress the pitch motion, the wing plate should be closer to the stern. The stern can quickly submerge by the buoyancy of the wing plate, and the pitch motion amplitude is increased together with the bow water pressure plate. The wing plate provides sufficient buoyancy to provide a large restoring force in the width direction to suppress the roll motion.

[0018] Preferably, the wing plate is installed on the side wall of the buoyancy tank and above the horizontal pipe.

[0019] Preferably, the interior of the buoyancy tank is divided into several ballast water compartments.

[0020] The present application has the following beneficial effects:

[0021] The hollow structure of the wing plate on both sides of the hull can provide a large buoyancy for the device, ensure that the power generation device does not have a large amplitude of roll motion in the horizontal direction, and maintain the attitude stability during the movement of the device. When the wave flows below the wing plate, the curved surface below the wing plate first interacts with the wave, first moves downward along the lower curved surface, and the smooth curved surface of the lower part of the wing plate can effectively reduce the wave energy loss caused by the downward movement of the wave. The wave interacts with the wing plate during the downward movement, generates an upward force on the stern, and the hollow structure of the wing plate also provides an upward buoyancy for the tail of the device. The tail of the device is quickly lifted under the action of the two forces, so that the device generates a large amplitude of pitch motion response, and the power generation efficiency of the device is improved.

[0022] The above arrangement maintains a large pitch motion response, so it has a large capture width ratio, which ensures that the wave energy power generation device always maintains a high power generation efficiency state under the action of the sea conditions in the working sea area. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 The figure is a schematic diagram of the bow structure of the present application;

[0024] Figure 2is a front view of the ship of the present application;

[0025] Figure 3 is a side view of the ship of the present application;

[0026] Figure 4 is a top view of the ship of the present application;

[0027] Figure 5 is a curve of regular wave of the present application;

[0028] Figure 6 is a perspective view of the wave energy power generation device of the present application from the first angle;

[0029] Figure 7 is a perspective view of the wave energy power generation device of the present application from the second angle;

[0030] Figure 8 is a side view of the wave energy power generation device of the present application;

[0031] Figure 9 is a side view of the wing of the present application;

[0032] Figure 10 is a flow chart of the ballast water system of the present application.

[0033] The reference signs in the drawings represent:

[0034] 1, wave breaking cone head; 2, water pressure plate; 3, horizontal pipe; 4, elbow pipe; 5, air chamber; 6, buoyancy cabin; 7, single point mooring system; 8, wing. DETAILED DESCRIPTION

[0035] The present application will be described in detail below in conjunction with the drawings and specific embodiments.

[0036] Embodiment: as shown in the drawings: Figures 1-5

[0037] The water pressure plate 2 is horizontally arranged at the upper end of the wave breaking cone head 1 and is integrally formed. The water pressure plate 2 and the wave breaking cone head 1 are hollow inside to provide buoyancy for the wave energy power generation device of the present application, so that the front part of the power generation device is higher than the rear part, and the wave can better act on the front part. The wave breaking cone head 1 is located at the middle part of the water pressure plate 2.

[0038] ​In the process of wave propagation, the wave passes through the breaking wave cone head 1 along the streamlined structure of the bow, and the conical structure of the breaking wave cone head 1 facilitates cutting the wave, so that the water plane plate 2 of the bow moves downward. Since the lower part of the water plane plate 2 is a smooth curved surface, the loss of wave energy during the downward movement of the bow is reduced, the bow continues to move downward, and the wave and the horizontal part of the water plane plate 2 strike each other, which has a large wave force on the bow part. At the same time, the hollow breaking wave cone head 1 and the water plane plate 2 can provide a large buoyancy to the bow, and under the combined action of the buoyancy and the wave force on the bow, the bow part moves upward rapidly, so that the device generates a large amplitude of pitch motion response, and the power generation efficiency of the device is improved.

[0039] At the same time, the water plane plate 2 extends horizontally from the upper end of the breaking wave cone head 1 to the opposite sides, and the left and right parts of the water plane plate 2 on the opposite sides of the breaking wave cone head 1 are symmetrically arranged. The water plane plate 2 will not have a large amplitude of roll motion in the horizontal direction, and the posture of the power generation device during movement is kept stable, which also ensures the posture stability of the wave energy power generation device in different sea conditions.

[0040] Regarding the curved surface shape of the lower surface of the bow water plane plate 2, it is not limited to a certain specific curved surface shape when selected, and various shapes can be considered, but regardless of the shape selected, the ultimate goal is to reduce the energy loss in the wave propagation process. For example, a part of a circular arc or a certain segment of an elliptical curve can be selected as the cross-sectional shape of the curved surface below the water plane plate 2, which can ensure that the energy loss during the interaction between the wave and the curved surface of the bow water plane plate 2 is reduced, and such shapes are also convenient for production and manufacturing.

[0041] Further, as shown by the thick line in Figure 3 and 5 , a curve within a quarter period of a regular wave can also be selected as the cross-sectional shape of the curved surface below the water plane plate 2. In the process of wave propagation, the wave surface energy of the wave can exactly fit the curved surface below the bow water plane plate 2, thereby minimizing the loss of wave energy. For the selection of regular wave parameters, the significant wave height and the wave period corresponding to the sea state can be selected as the wave height and the period of the regular wave according to the specific sea state of the working sea area. The significant wave height can be the average value of the historical sea state wave height data.

[0042] Although the lower surface of the wing plate 8 and the water plane plate 2 are both from "a curve within a quarter period of a regular wave", when the wave propagates from the bow to the stern, it interacts with the structure and then changes.

[0043] As shown in Figures 6-8As shown, it is a back-bent pipe wave energy power generation device, including a hull, a bow and wings 8 installed on both sides of the hull, the hull is composed of a gas chamber 5, a back-bent pipe structure with open ends and a buoyancy cabin 6, the back-bent pipe structure includes a horizontal pipe 3 and a bent pipe 4, the horizontal pipe 3 of the bent pipe is connected to the buoyancy cabin 6 at the upper part, the gas chamber 5 is located above the bent pipe 4, and the air turbine device above the pipe of the gas chamber 5 can be used to convert mechanical energy into electrical energy. In addition, the single-point mooring system 7 of the device is located on the front side of the longitudinal length of the hull near the center of gravity, which can ensure the safety of the wave energy power generation device in dangerous sea conditions, and the position of the single-point mooring system 7 will not limit the pitch motion response of the wave energy power generation device, so that the device always maintains a high power generation efficiency state to ensure the safety of the device in dangerous sea conditions. Two curved trapezoidal wings 8 are placed on both sides of the hull to ensure the stability of the wave energy power generation device under the action of working sea conditions, and to provide buoyancy in the width direction of the device to suppress the rolling motion.

[0044] The cross-sectional shape of the horizontal pipe 3 is "gyroscopic", which is adopted to ensure that the internal curved surface of the flow channel is relatively smooth, reduce the energy loss caused by mutual friction between the fluid and the flow channel during the flow process, effectively reduce the water resistance of the device during oscillation, increase the motion amplitude, and improve the capture performance of the device. In addition, the flow channel in the horizontal pipe 3 is a streamline curved surface, which reduces the energy loss of wave motion. The inlet cross-sectional area of the bent pipe 4 is greater than the horizontal cross-sectional area of the gas chamber 5, so that the flow speed of the fluid in the gas chamber is greater than the fluid speed of the horizontal pipe 3, and the aerodynamic efficiency is improved. The gas chamber 5 is located above the bent pipe 4, and the flow of fluid in the back-bent pipe causes the pressure in the gas chamber to change to form a pressure difference.

[0045] The buoyancy cabin 6 is located above the horizontal pipe 3, which provides buoyancy for the device to ensure the stability of the device during motion, and on the other hand, divides the interior of the buoyancy cabin 6 into a plurality of small ballast water compartments distributed in multiple layers, according to the sea condition investigation of the working sea area, different ballast water schemes are preset in advance, so that the device can adjust the ballast condition of the cabin according to different levels of working sea conditions, change the center of gravity position and mass distribution of the device, and thus adjust the natural period of pitch motion of the device. The natural period of pitch motion of the wave energy power generation device after adjustment is close to the wave period of the sea condition where the working sea area is located, so that the wave energy power generation device and the wave resonate as much as possible to obtain a larger pitch motion response, so that the device can maintain a high power generation efficiency.

[0046] Two symmetrical curved trapezoidal wing plates 8 are located on either side of the hull. Both wing plates 8 have hollow interiors, providing significant buoyancy in the width direction and a strong restoring force during roll, ensuring the device remains stable and preventing large-amplitude rolls. The wing plates 8 are positioned near the stern, for example, extending from mid-hull to stern. As waves propagate from bow to stern, the curved surface beneath the wing plates 8 interacts with the waves first. The smooth surface of the lower part of the wing plate 8 effectively reduces wave energy loss during downward movement. The interaction between the waves and the wing plates 8 generates an upward force on the stern, while the hollow structure of the wing plates 8 provides upward buoyancy to the stern. Under the combined action of these two forces, the stern of the device rapidly rises, resulting in a larger-amplitude pitch response and improved power generation efficiency. If the wing plate 8 extends from the bow, the buoyancy provided by the hollow wing plate 8 will also provide a large restoring force in the length direction of the ship, which will suppress the pitching motion related to power generation efficiency.

[0047] Compared with the multiple small wing plates of the distributed structure, the large wing plate of the integral hull sidewall structure has the following advantages: First, fewer components can better ensure the consistency of the structure of the two wing plates and prevent the device from tilting. Second, the integral structure has fewer components, higher reliability, and is easier to maintain in case of failure.

[0048] Regarding the surface shape of the lower surface of the airfoil 8, the selection is not limited to a specific surface shape; various airfoil shapes can be considered. However, regardless of the shape chosen, the ultimate goal is to reduce energy loss during wave propagation. For example, choosing a circular arc or a segment of an ellipse as the cross-sectional shape of the lower surface of the airfoil 8 can ensure reduced energy loss during the interaction between waves and the surface of the airfoil 8. At the same time, such shapes are also easy to manufacture.

[0049] like Figure 3 and 9 As shown by the thick line, the curve within a quarter period of the regular wave can also be selected as the cross-sectional shape of the lower curved surface of the curved airfoil 8. During wave propagation, the wave surface can fit precisely with the lower curved surface of the airfoil 8, minimizing wave energy loss. Regarding the selection of regular wave parameters, the significant wave height and wave period corresponding to the specific sea conditions of the working area can be selected as the wave height and period of the regular wave. The significant wave height can be taken as the average value from historical sea condition wave height data.

[0050] The sea conditions of the working sea area of the wave energy power generation device change in real time with the seasons and the climate, but in marine engineering, it is considered that the short-term sea conditions in the same sea area do not change within three hours. Different sea conditions correspond to different wave periods, and if the wave energy power generation device wants to achieve high power generation, it needs to make the inherent period of the power generation device itself, especially the inherent period of the pitch related to the power generation, as close as possible to the wave inherent period corresponding to the sea conditions. In marine engineering, the inherent period of the floating body is affected by the position of the center of gravity of the floating body and the weight distribution, so the buoyancy tank 6 of the wave energy power generation device can be divided into a plurality of small ballast water compartments. By changing the state of the small ballast water compartments, the center of gravity of the wave energy power generation device and the weight distribution are changed, and then the inherent period of the pitch motion of the wave energy power generation device is changed. When the adjusted inherent period of the pitch motion is the same as or close to the wave period of the current sea conditions, the wave energy power generation device will resonate violently in the pitch direction under the action of the wave, so that the pitch motion always maintains a large motion amplitude, and the wave energy power generation device maintains a high power generation efficiency.

[0051] As shown in Figure 10 , it can be divided into the following steps:

[0052] 1. Sea condition investigation of working sea area

[0053] First, it is necessary to understand the n sea conditions that the wave energy power generation device may encounter during operation in the working sea area. The relevant data can be obtained by analyzing the short-term sea condition history data of the working area, or by previously deploying a buoy to estimate the n sea conditions that may exist in the sea area through the motion data of the buoy under the long-term action of the wave in the working sea area.

[0054] 2. Design corresponding ballast scheme according to sea conditions

[0055] After the n sea conditions that the wave energy power generation device may encounter during operation are determined, the buoyancy tank 6 of the wave energy power generation device is divided into a plurality of small ballast water compartments according to the possible sea conditions. The small ballast water compartments are mutually sealed, and a ballast water pipe is arranged in each small ballast water compartment. By controlling the electric pump through the control system, the ballast water pipe can pump or drain water, so that each small ballast water compartment is in a full load (full of water) or empty load (completely without water) state. By coordinating the two states of the different ballast water compartments being full of water or completely without water, the center of gravity of the wave energy power generation device and the weight distribution are changed, and then the inherent period of the pitch motion of the device is changed.

[0056] It should be noted that the wave energy generation device in this scheme does not need to adjust the inherent period of the pitch motion of the device in real time through the intelligent ballast water system. It only needs to preset j kinds of schemes for the n sea conditions that the wave energy generation device may encounter. For these n sea conditions, the wave energy generation device can adjust its inherent period of pitch motion through the intelligent ballast water system, so that its inherent period of pitch motion is the same as or close to the wave period of the real-time sea condition. The j kinds of ballast schemes preset by the device correspond to the n sea conditions, i.e. n = j.

[0057] 3. Intelligent ballast adjustment according to sea conditions

[0058] (1) Sea condition monitoring.

[0059] After the wave energy generation device is put into the working sea area, the working condition of the sea area is monitored every T time to determine which of the n sea conditions the current sea area belongs to.

[0060] The working condition can be monitored by setting a monitoring buoy in the sea area. The sea condition level of the current sea area is determined by monitoring the movement data of the monitoring buoy. The sea condition in the sea area is fed back to the wave energy generation device through data transmission. The sea condition analysis device can also be installed directly on the wave energy generation device to determine the sea condition level of the current wave energy generation device.

[0061] (2) Intelligent ballast adjustment

[0062] After the wave energy generation device obtains the real-time sea condition of the current working sea area, the intelligent ballast system determines which of the j kinds of ballast water schemes should be used in the wave energy generation device according to the current sea condition. The intelligent ballast water system controls the electric pump to pump or drain water through the ballast water pipe, so that each small ballast water cabin is in a full load (full of water) or empty load (completely without water) state, achieving the preset scheme. The adjusted inherent period of pitch motion is the same as or close to the wave period of the current sea condition. At this time, the wave energy generation device will have a violent resonant motion in the pitch direction, so that the pitch motion always maintains a large motion amplitude, and the wave energy generation device maintains a high power generation efficiency.

[0063] The information is returned to the sea state every T time (three hours) to determine whether the sea state level changes, and the corresponding ballast scheme is adjusted after the sea state level changes. Compared with the continuous operation scheme, the present scheme adopts a periodic working mode, and the operation is performed every three hours. This way simplifies the entire system workflow and is beneficial to prolong the service life of the equipment. In addition, using the preset ballast scheme also reduces the demand for processor computing power, and there is no need to calculate and adjust the ballast scheme in real time to cope with different sea states. Only periodic adjustment according to the previously evaluated sea state level is required. This design makes the entire system more simple and efficient. The center of gravity of the ship body in the ballast water scheme is distributed relative to the length direction of the ship body.

[0064] The above only describes the embodiments of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation using the content of the present application specification and drawings, or direct or indirect application in other related technical fields, is also included in the patent protection scope of the present application.

Claims

1. A wave energy generating vessel with a curved back, comprising a bow and a hull, characterized in that: The bow includes a wave-breaking cone (1) and a water-pressing plate (2) horizontally set on the upper end of the wave-breaking cone (1). The hull includes: A back bend pipe with openings at both ends, the back bend pipe comprising a horizontal pipe (3) and a bend pipe (4). Air chamber (5), the air chamber (5) is located at the upper end of the curved pipe (4); A buoyancy chamber (6) is located above the horizontal pipe (3); Wings (8), two sets of symmetrical wings (8) are located on both sides of the hull; The smooth curved surface of the lower surface of the wing plate (8) has a regular wave shape with a quarter period; The wing plate (8) is located at the stern; A single-point mooring system (7) is installed on the bottom wall of the horizontal pipe (3) near the bow.

2. The wave energy generating vessel hull with a curved tube as described in claim 1, characterized in that: The cross-sectional shape of the horizontal pipe (3) is "gyroscope-shaped"; the internal flow channel of the horizontal pipe (3) is a streamlined curved surface.

3. The wave energy generating vessel hull with a curved tube as described in claim 1, characterized in that: The inlet cross-sectional area of ​​the curved pipe (4) is larger than the horizontal cross-sectional area of ​​the air chamber (5).

4. The wave energy generating vessel hull with a curved tube as described in claim 1, characterized in that: The wing plate (8) is hollow inside.

5. The wave energy generating vessel hull with a curved tube as described in claim 1, characterized in that: The wing plate (8) is installed on the side wall of the buoyancy chamber (6) and is located above the horizontal pipe (3).

6. The wave energy generating vessel hull with a curved tube as described in claim 1, characterized in that: The buoyancy chamber (6) is divided into several ballast water chambers.

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