Oscillating water column wave energy conversion system based on magneto-hydrodynamic power generation

Abstract

The present application relates to wave energy power generation technical field, provide a kind of oscillating water column wave energy conversion system based on magneto-hydrodynamic power generation, at least includes: float, including sealed end and open end, open end is suitable for extending into water body, to make the region between water surface and sealed end in the interior of float form air chamber, air chamber has with the gas passage of outside communication, air chamber is provided with magnetic field;Oscillating space is arranged in air chamber, and can be deformed;Oscillating space is filled with liquid metal, and oscillating space is suitable for deforming to make liquid metal flow cutting magnetic field to generate current when being impacted by airflow.The conversion system, oscillating space can be deformed to make liquid metal flow cutting magnetic field to generate current when being impacted by airflow upward or downward.Compared with traditional rotary turbine generator, without setting one-way valve rectification system, structure is more simple, more easily maintained, cost is lower, it is conducive to wide range of popularization and use.

Description

Technical Field

[0001] The present invention relates to the technical field of wave energy power generation, and in particular to an oscillating water column wave energy conversion system based on magnetohydrodynamic power generation. Background Art

[0002] Figure 1 Schematic diagram of a conventional oscillating water column wave energy conversion system; Figure 1 As shown, a conventional oscillating water column wave energy conversion system primarily consists of a floating body 2 and a rotating turbine generator 1. The lower portion of the floating body 2 is connected to the seawater, and the upper portion is connected to the atmosphere. The water column within the floating body 2 generates an oscillating water column as the waves move, compressing the air within the floating body 2 to form a reciprocating airflow. This reciprocating airflow drives the rotating turbine generator 1, converting the airflow energy into electrical energy.

[0003] However, under the action of reciprocating airflow, the traditional rotary turbine generator 1 cannot maintain its unidirectional rotation characteristics, and generally requires a one-way valve rectification system. However, its structure is complex and maintenance is difficult. The one-way valve rectification system required for large-scale equipment is relatively large and costly, which is not conducive to large-scale promotion and use. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is that the conventional oscillating water column wave energy conversion system in the prior art needs to be equipped with a one-way valve rectification system, but its structure is complex and maintenance is difficult. The one-way valve rectification system required for large-scale equipment is relatively large and the cost is high, which is not conducive to large-scale promotion and use. Thus, an oscillating water column wave energy conversion system based on magnetohydrodynamic power generation is provided.

[0005] In order to solve the above technical problems, the technical solutions of the present invention are as follows:

[0006] An oscillating water column wave energy conversion system based on magnetohydrodynamic power generation comprises at least: a float, comprising a sealed end and an open end, the open end being adapted to extend into the water body so as to form an air chamber in the area inside the float between the water surface and the sealed end, the air chamber having a gas channel connected to the outside, and a magnetic field being arranged in the air chamber; an oscillation space being arranged in the air chamber and capable of deformation; the oscillation space being filled with liquid metal, the oscillation space being adapted to deform when impacted by airflow so that the liquid metal flows and cuts the magnetic field to generate current.

[0007] Furthermore, the oscillation space is formed by a bellows, the expansion and contraction direction of the bellows is consistent with the movement direction of the airflow; and the end surface of the bellows impacted by the airflow is a sealing structure.

[0008] Further, two electrodes are arranged on the cavity wall of the oscillation space, and the liquid metal and the two electrodes are adapted to be connected to an external power storage device to form a power generation circuit.

[0009] Further, the oscillating water column wave energy conversion system based on the magneto-hydrodynamic power generation further comprises a fixing member arranged in the air chamber, and at least one flow channel is arranged on the fixing member; the oscillation space passes through the flow channel and is fixed on the fixing member; the fixing member divides the air chamber into a first air chamber and a second air chamber along the movement direction of the airflow, and at least one air hole adapted to communicate the first air chamber and the second air chamber is arranged on the fixing member.

[0010] Further, the two electrodes are arranged on the inner wall of the flow channel; the bellows comprise an upper bellows and a lower bellows; the upper bellows is connected to the end face of the first air chamber with the fixing member, and the lower bellows is connected to the end face of the second air chamber with the fixing member; the upper bellows, the lower bellows, the inner wall of the flow channel and the two electrodes form the oscillation space.

[0011] Further, two magnetic bodies with opposite magnetic properties are arranged on the inner wall of the flow channel, and the two magnetic bodies are arranged to face each other to form the magnetic field in the region between the two magnetic bodies; the direction of the magnetic field is perpendicular to the length direction of the flow channel.

[0012] Further, the flow channel comprises two, and each flow channel corresponds to one oscillation space; different two oscillation spaces are communicated with each other.

[0013] Further, the flow channel comprises two, and each flow channel corresponds to one oscillation space; different two oscillation spaces are communicated with each other.

[0014] Further, the oscillating water column wave energy conversion system based on the magneto-hydrodynamic power generation further comprises a nozzle arranged at the sealed end of the floating body, and the nozzle and the air hole form the gas passage.

[0015] Further, when the air hole is multiple, the multiple air holes are circularly arranged in an array along the circumference of the flow channel.

[0016] The technical scheme of the present application has the following advantages:

[0017] The oscillating water column wave energy conversion system based on the magnetohydrodynamic power generation provided by the application is provided with an oscillating space capable of deforming in the air chamber, which can deform to make the liquid metal flow to cut the magnetic field to generate current when impacted by upward or downward airflow. Compared with the traditional rotary turbine generator, the oscillating water column wave energy conversion system based on the magnetohydrodynamic power generation does not need to be provided with a one-way valve rectification system, has a more compact structure, is easier to maintain and has a lower cost, and is conducive to wide promotion and use. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the specific embodiments of the application or the technical solutions in the prior art, the drawings needed to be used in the specific embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can also be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0019] Figure 1 It is a schematic diagram of a conventional oscillating water column wave energy conversion system.

[0020] Figure 2 It is a schematic diagram of the oscillating water column wave energy conversion system based on the magnetohydrodynamic power generation in one embodiment of the application.

[0021] Figure 3 It is a schematic diagram of the oscillating water column wave energy conversion system based on the magnetohydrodynamic power generation in one embodiment of the application. Figure 2 It is a sectional view of the fixing part in the oscillating water column wave energy conversion system based on the magnetohydrodynamic power generation in one embodiment of the application.

[0022] Figure 4 It is a schematic diagram of the oscillating water column wave energy conversion system based on the magnetohydrodynamic power generation in another embodiment of the application.

[0023] Figure 5 It is a schematic diagram of the oscillating water column wave energy conversion system based on the magnetohydrodynamic power generation in another embodiment of the application.

[0024] Figure 6 It is a schematic diagram of the oscillating water column wave energy conversion system based on the magnetohydrodynamic power generation in another embodiment of the application. Figure 5 It is a sectional view of the fixing part in the oscillating water column wave energy conversion system based on the magnetohydrodynamic power generation in another embodiment of the application.

[0025] Figure 7 It is a schematic diagram of the oscillating water column wave energy conversion system based on the magnetohydrodynamic power generation in another embodiment of the application.

[0026] Figure 8 It is a schematic diagram of the oscillating water column wave energy conversion system based on the magnetohydrodynamic power generation in another embodiment of the application.

[0027] Figure 9 It is a schematic diagram of the oscillating water column wave energy conversion system based on the magnetohydrodynamic power generation in another embodiment of the application.

[0028] 1, rotary turbine generator; 2, floating body; 3, water surface;

[0029] 4, oscillation space; 5, liquid metal; 6, fixing member;

[0030] 7, first air chamber; 8, second air chamber; 9, electrode;

[0031] 10, magnetic field; 11, air hole; 12, nozzle;

[0032] 13, magnet; 14, upper corrugated pipe; 15, lower corrugated pipe. DETAILED DESCRIPTION

[0033] The technical solutions of the present application will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0034] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0035] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through intermediate medium, or internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0036] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as there is no conflict between them.

[0037] Figure 2 Fig. 1 is a schematic diagram of an oscillating water column type wave energy conversion system based on magnetic fluid power generation in an embodiment of the present application; Fig. 2 is a schematic diagram of a wave energy conversion system based on magnetic fluid power generation in another embodiment of the present application; and Figure 2As shown, the embodiment provides an oscillating water column type wave energy conversion system based on magneto-hydrodynamic power generation, at least comprising: a floating body 2, which can be composed of two pipes with different diameters, wherein the end of the pipe with larger diameter is an open end, and the end of the pipe with smaller diameter is a sealed end, the pipe with larger diameter is adapted to extend into the water body, and the pipe with smaller diameter is located above the water surface 3. After the open end is adapted to extend into the water body, an air chamber can be formed in the area between the water surface 3 and the sealed end inside the floating body 2, and the air chamber has a gas passage connected with the outside. A magnetic field 10 is arranged in the air chamber; an oscillating space 4 is arranged in the air chamber and can be deformed; the oscillating space 4 is filled with liquid metal 5, and the oscillating space 4 is adapted to be deformed to make the liquid metal 5 flow to cut the magnetic field 10 to generate current when the oscillating space 4 is impacted by airflow. The oscillating space 4 can be made of elastic material or a telescopic pipe.

[0038] The filling amount of the liquid metal 5 can be designed according to the volume of the oscillating space 4. When the airflow impacts the oscillating space 4 upward, the bottom of the oscillating space 4 is compressed, and the volume is reduced, so as to force the liquid metal 5 in the oscillating space 4 to move upward to cut the magnetic field 10 to generate current, and at this time, the liquid metal 5 forces the volume of the top of the oscillating space 4 to increase. The specific deformation process of the oscillating space 4 is as follows: when the airflow impacts the oscillating space 4 downward, the top of the oscillating space 4 is compressed, and the volume is reduced, so as to force the liquid metal 5 in the oscillating space 4 to move downward to cut the magnetic field 10 to generate current, and at this time, the liquid metal 5 forces the volume of the bottom of the oscillating space 4 to increase. Such a cycle can continuously generate current no matter the airflow moves upward or downward.

[0039] The oscillating water column type wave energy conversion system based on magneto-hydrodynamic power generation provided by the embodiment sets the oscillating space 4 which can be deformed in the air chamber, and the oscillating space 4 can be deformed to make the liquid metal 5 flow to cut the magnetic field 10 to generate current no matter the airflow impacts upward or downward. Compared with the traditional rotary turbine generator 1, the oscillating water column type wave energy conversion system does not need to set a one-way valve rectification system, and has a more compact structure, is easier to maintain, has a lower cost, and is conducive to wide promotion and use.

[0040] The oscillating space 4 is formed by a bellows, and the telescopic direction of the bellows is consistent with the movement direction of the airflow; the end surface of the bellows impacted by the airflow is a sealed structure. That is, the upper and lower end surfaces of the bellows are both sealed structures, and when the bellows is impacted by the airflow, the end impacted by the airflow is compressed, the volume is reduced, and the other end is stretched, and the volume is increased.

[0041] Figure 3 For Figure 2 the sectional view of the fixing member; as Figure 3As shown in the drawings, the oscillating water column wave energy conversion system based on the magnetohydrodynamic power generation further comprises a fixing member 6 arranged in the air chamber, and at least one flow channel is arranged on the fixing member 6. For example, the fixing member 6 can have a cylindrical structure, the diameter of the fixing member 6 is the same as the inner diameter of the smaller-diameter pipe at the upper portion of the floating body 2, the fixing member 6 is coaxially arranged with the floating body 2, and the fixing member 6 and the inner wall of the floating body 2 can be connected by bonding or welding, or the fixing member 6 can be mounted on the inner wall of the floating body 2 through a flange. For example, when there is only one flow channel on the fixing member 6, the flow channel can be located at the center of the fixing member 6, the oscillating space 4 passes through the flow channel and is fixed on the fixing member 6. For example, the oscillating space 4 and the inner wall of the flow channel can be connected by bonding.

[0042] The cavity wall of the oscillating space 4 is provided with two electrodes 9, which can be flat electrodes 9 or curved electrodes 9, and the two electrodes 9 are arranged at a distance from each other. The liquid metal 5 and the two electrodes 9 are adapted to be connected to an external power storage device to form a power generation circuit. For example, the electrodes 9 can be connected to the bellows as a whole first, and then fixed in the flow channel. For example, the electrodes 9 can be fixed on the inner wall of the flow channel first, and then the bellows is connected to the flow channel and the electrodes 9 to form the oscillating space 4. The rest of the flow channel except the electrodes 9 can be made of insulating materials.

[0043] The fixing member 6 divides the air chamber into a first air chamber 7 and a second air chamber 8 along the movement direction of the airflow, and the fixing member 6 is provided with at least one air hole 11 adapted to communicate the first air chamber 7 and the second air chamber 8.

[0044] For example, when the two electrodes 9 are arranged on the inner wall of the flow channel, the length of the electrodes 9 can be the same as or less than the length of the flow channel. The bellows includes an upper bellows 14 and a lower bellows 15. The upper bellows 14 can be connected to the end face of the fixing member 6 in the first air chamber 7 by bonding, and the lower bellows 15 can be connected to the end face of the fixing member 6 in the second air chamber 8 by bonding. At this time, the upper bellows 14, the lower bellows 15, the inner wall of the flow channel and the two electrodes 9 form the oscillating space 4.

[0045] The inner wall of the flow channel is provided with two magnets 13 with opposite magnetic properties, and the two magnets 13 are arranged to face each other to form a magnetic field 10 in the region between the two magnets 13. The direction of the magnetic field 10 is perpendicular to the length direction of the flow channel. For example, the direction of the line connecting the two magnets 13 can be perpendicular to the direction of the line connecting the two electrodes 9. For example, the magnets 13 can be permanent magnets 13, and a uniform magnetic field 10 in a single direction is formed in the region between the two magnets 13.

[0046] Wherein, the oscillating water column wave energy conversion system based on magneto-hydrodynamic power generation further comprises a nozzle 12 arranged at the sealed end of the floating body 2, and the nozzle 12 and the air hole 11 form a gas passage. The gas flow in the second air chamber 8 can reach the first air chamber 7 through the air hole 11, and then be discharged out of the floating body 2 through the nozzle 12. Similarly, the external gas flow can enter the first air chamber 7 through the nozzle 12, and then enter the second air chamber 8 through the air hole 11.

[0047] Wherein, when the air hole 11 has multiple air holes, the multiple air holes 11 are arranged in a circular array along the circumference of the flow channel. For example, there can be four air holes 11, and each air hole 11 is arranged at an interval of 90°. In this way, the gas flow is uniformly distributed, and the impact on the oscillation space 4 is more stable, which is beneficial to improve the power generation effect.

[0048] When the water column in the air chamber oscillates with the wave motion, the air in the air chamber is compressed to form reciprocating gas flow and pass through the air hole 11 and the nozzle 12, so as to convert the wave energy into gas flow energy; the oscillating gas flow drives the corrugated pipe to move, and then drives the liquid metal 5 to cut the magnetic force line to generate induced electromotive force, and connects the load to output electric energy.

[0049] Figure 4 FIG. 2 is a schematic diagram of the oscillating water column wave energy conversion system based on magneto-hydrodynamic power generation in another embodiment of the present application; Figure 5 FIG. 2 is a schematic diagram of the oscillating water column wave energy conversion system based on magneto-hydrodynamic power generation in another embodiment of the present application; Figure 6 FIG. 2 is a schematic diagram of the oscillating water column wave energy conversion system based on magneto-hydrodynamic power generation in another embodiment of the present application; Figure 5 FIG. 2 is a schematic diagram of the oscillating water column wave energy conversion system based on magneto-hydrodynamic power generation in another embodiment of the present application; Figure 4 FIG. 2 is a schematic diagram of the oscillating water column wave energy conversion system based on magneto-hydrodynamic power generation in another embodiment of the present application; Figure 5 FIG. 2 is a schematic diagram of the oscillating water column wave energy conversion system based on magneto-hydrodynamic power generation in another embodiment of the present application; Figure 6 In some embodiments, the flow channel on the fixing member 6 can have two, three or even more, and the specific number can be designed according to actual needs. For example, the shape of each flow channel can be cylindrical, and correspondingly, the oscillation space 4 can be cylindrical. For example, the shape of each flow channel can also be annular, and correspondingly, the oscillation space 4 can also be annular or cylindrical. For example, when the flow channel has two, one oscillation space 4 is arranged for each flow channel, and the two oscillation spaces 4 can be connected with each other or independent of each other.

[0050] Figure 7 FIG. 2 is a schematic diagram of the oscillating water column wave energy conversion system based on magneto-hydrodynamic power generation in another embodiment of the present application, Figure 8 FIG. 2 is a schematic diagram of the oscillating water column wave energy conversion system based on magneto-hydrodynamic power generation in another embodiment of the present application; Figure 7 FIG. 2 is a schematic diagram of the oscillating water column wave energy conversion system based on magneto-hydrodynamic power generation in another embodiment of the present application; Figure 8

[0051] Figure 9 ​A schematic diagram of the oscillating water column wave energy conversion system based on the magneto-hydrodynamic power generation in another embodiment of the present application is shown in FIG. 13, in which the floating body 2 can have a U-shaped structure in this embodiment. Figure 9

[0052] In summary, the oscillating water column wave energy conversion system based on the magneto-hydrodynamic power generation in the present application uses the liquid metal 5 magnetic fluid as the power generation working medium reciprocating flow in the generator, has no rotating mechanical moving parts, and matches the reciprocating air flow movement characteristics well. The liquid metal 5 magnetic fluid generator is coupled with the oscillating water column capturing system, and the problems of the poor reliability of bearings, couplings and rotors caused by the multi-dimensional movement of the turbine generator set are solved.

[0053] Obviously, the above embodiments are only examples for clearly illustrating the present application, and are not intended to limit the embodiments. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, it is not necessary and impossible to enumerate all the embodiments. The obvious changes or variations derived therefrom are still within the protection scope of the present application.​

Claims

1. An oscillating water column wave energy conversion system based on magnetohydrodynamic power generation, characterized in that: At least: A float, comprising a sealed end and an open end, wherein the open end is adapted to extend into the water body so that an air chamber is formed in an area inside the float between the water surface and the sealed end, the air chamber having a gas passage communicating with the outside world, and a magnetic field being provided in the air chamber; an oscillation space, disposed within the air chamber and capable of deformation; the oscillation space is filled with liquid metal, and the oscillation space is adapted to deform when impacted by airflow so that the liquid metal flows and cuts the magnetic field to generate current; The oscillation space is formed by a bellows, and the expansion and contraction direction of the bellows is consistent with the movement direction of the airflow; The end surface of the bellows impacted by the airflow is a sealing structure; It also includes a fixing member, which is arranged in the air chamber, and at least one flow channel is provided on the fixing member; the oscillation space passes through the flow channel and is fixed on the fixing member; The fixing member divides the air chamber into a first air chamber and a second air chamber along the direction of air flow, and the fixing member is provided with at least one air hole adapted to connect the first air chamber and the second air chamber; It also includes a nozzle disposed at the sealed end of the float, wherein the nozzle and the air hole form the gas channel; Two electrodes are provided on the cavity wall of the oscillation space, and the two electrodes are spaced apart from each other. The liquid metal and the two electrodes are suitable for being connected to an external power storage device to form a power generation circuit; The two electrodes are both arranged on the inner wall of the flow channel; The bellows includes an upper bellows and a lower bellows; The upper bellows is connected to the end surface of the fixing member located in the first air chamber, and the lower bellows is connected to the end surface of the fixing member located in the second air chamber. The upper bellows, the lower bellows, the inner wall of the flow channel and the two electrodes form the oscillation space; Two magnets with opposite magnetic properties are arranged on the inner wall of the flow channel, and the two magnets are arranged facing each other to form the magnetic field in the area between the two magnets; The direction of the magnetic field is perpendicular to the length direction of the flow channel.

2. The oscillating water column wave energy conversion system based on magnetohydrodynamic power generation according to claim 1 is characterized in that: The flow channels include two, and each flow channel is correspondingly provided with one oscillation space; The two different oscillation spaces are communicated with each other.

3. The oscillating water column wave energy conversion system based on magnetohydrodynamic power generation according to claim 1 is characterized in that: The flow channels include two, and each flow channel is correspondingly provided with one oscillation space; The two different oscillation spaces are independent of each other.

4. The oscillating water column wave energy conversion system based on magnetohydrodynamic power generation according to any one of claims 1 to 3, characterized in that: When there are multiple air holes, the multiple air holes are distributed in a circular array along the circumference of the flow channel.

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