Wave power generation system

Abstract

The present invention provides a wave power generation system that makes it possible to properly pump fluid upward even when a change in the water surface such as the tide level is large.　A tower structure-type wave power generation system S is configured so as to be capable of removing a transverse wave component from a wave (wave power) that vertically moves a floating body 10, thereby extracting a longitudinal wave component, and of causing stable vertical motion of the floating body 10 on the basis of the water pressure difference based on the longitudinal wave component.

Description

Wave power generation system

[0001] The present invention relates to a wave power generation system.

[0002] Conventionally, a wave power generation system has been proposed that generates electricity by rotating a turbine or a motor based on the energy generated by the up-and-down movement of waves.

[0003] Such a wave power generation system is one of the renewable energies, and has a large power generation amount per unit compared to other renewable energies such as solar power generation or wind power generation, and enables stable power generation.

[0004] Also, recently, in such a wave power generation system, in order to increase the power generation amount while reducing the running cost, there is known one that converts the potential energy of a fluid transported to a predetermined height by wave power into electricity through a power generation unit (for example, Japanese Patent Application Laid-Open No. 2018-066367).

[0005] However, in the wave power generation system described in Patent Document 1, since the fluid is pumped up in accordance with the up-and-down movement of the waves and transported to a predetermined height, when the change in the water surface such as the tide level is large, the difference in the up-and-down stroke when pumping up the fluid accordingly also becomes large. Depending on the structure of the pumping-up mechanism such as the pumping-up mechanism being fixed, the stroke becomes unstable, and there may be a case where the fluid cannot be properly pumped up to a predetermined height.

[0006] The present invention has been made to solve the above problems, and an object thereof is to provide a wave power generation system capable of properly pumping up a fluid even when the change in the water surface such as the tide level is large.

[0007] To solve the above problems, the wave power generation system according to the present invention is a wave power generation system that converts the potential energy of a fluid carried to a predetermined height by wave force into electricity via a power generation means, and comprises: a floating body that floats on the water surface and whose vertical position changes due to the wave force; a limiting means that limits the lateral swaying of the floating body caused by the wave force; a transporting means that transports the fluid to the predetermined height in accordance with the position change of the floating body; a dispensing means that sends out the fluid transported by the transporting means downward; and a power generation means that generates electricity using the potential energy of the fluid sent out by the dispensing means.

[0008] Figure 1 is a schematic diagram of the tower-type wave power generation system of the first embodiment (including upward or downward movement of the floating body and movement of fluid F). Figure 2 is a diagram illustrating the structure of the tower-type wave power generation system of the first embodiment. Figure 3A is a perspective view showing the structure of the floating body of the first embodiment. Figure 3B is a top view showing the structure of the floating body of the first embodiment. Figure 3C is a side view showing the structure of the floating body of the first embodiment. Figure 4A is a perspective view showing the bonding membrane of the pump-up mechanism of the first embodiment. Figure 4B is a diagram illustrating the change in state in the bonding membrane of the pump-up mechanism of the first embodiment due to the vertical movement of the push-up mechanism. Figure 5A is a side view of the structure including the upward-facing slit-shaped wave power adjustment mechanism of the first embodiment. Figure 5B is a side view of the structure including the downward-facing slit-shaped wave power adjustment mechanism of the first embodiment. Figure 6A is a diagram illustrating a modified example of the wave power adjustment mechanism of the first embodiment, and is a front view of the structure including the wave power adjustment mechanism. Figure 6B is a diagram illustrating a modified example of the wave force adjustment mechanism of the first embodiment, and is a side view of the structure including the wave force adjustment mechanism. Figure 7A is a diagram illustrating a modified example of the wave force adjustment mechanism of the first embodiment, and is a side view of the structure including the wave force adjustment mechanism composed of two wall members having slits. Figure 7B is a diagram illustrating a modified example of the wave force adjustment mechanism of the first embodiment, and is a side view of the structure including the wave force adjustment mechanism formed by three wall members having slits. Figure 8 is a diagram illustrating a modified example of the wave force adjustment mechanism of the first embodiment, and is a perspective view of the structure including the wave force adjustment mechanism formed by rectangular linear step-shaped members. Figure 9A is a diagram illustrating a modified example of the wave force adjustment mechanism of the first embodiment, and is a perspective view of the structure including the wave force adjustment mechanism formed by circular spiral step-shaped members. Figure 9B is a diagram illustrating a modified example of the wave force adjustment mechanism of the first embodiment, where (B) is a top view of the structure including the wave force adjustment mechanism.Figure 9C is a diagram illustrating a modified example of the wave power adjustment mechanism of the first embodiment, and is a side view of the structure including the wave power adjustment mechanism. Figure 10A is a perspective view of a tower-type wave power generation system in a modified example of the first embodiment. Figure 10B is a diagram illustrating the slit shape of a tower-type wave power generation system in a modified example of the first embodiment. Figure 11A is a top view of the shape (1) of the floating body in a tower-type wave power generation system in a modified example of the first embodiment. Figure 11B is a top view of the shape (2) of the floating body in a tower-type wave power generation system in a modified example of the first embodiment. Figure 12 is a diagram illustrating the change in state accompanying the vertical movement of the bonding membrane push-up mechanism in a modified example of the tower-type wave power generation system of the first embodiment. Figure 13 is a diagram illustrating the structure of the push-up mechanism and the storage section in a modified example of the tower-type wave power generation system of the first embodiment. Figure 14 shows an example of a modified version of the tower-structured wave power generation system of the first embodiment, in which the storage section is formed by a bonding membrane. Figure 15 shows an example of a modified version of the tower-structured wave power generation system of the first embodiment, in which the return channel is connected below the storage section. Figure 16A is an example of a side view of a cylindrical floating body in a modified version of the tower-structured wave power generation system of the first embodiment. Figure 16B is an example of a side view of a mortar-shaped floating body in a modified version of the tower-structured wave power generation system of the first embodiment. Figure 17 is a schematic diagram of the tower-structured wave power generation system of the second embodiment. Figure 18 is a diagram for explaining modified versions of the tower-structured wave power generation system of the second embodiment. Figure 19A is a diagram for explaining another embodiment 1 of the wave power adjustment mechanism in each embodiment. Figure 19B is a diagram for explaining another embodiment 1 of the wave power adjustment mechanism in each embodiment. Figure 19C is a diagram for explaining another embodiment 1 of the wave power adjustment mechanism in each embodiment. Figure 20A is a diagram illustrating another embodiment 1 of the wave force adjustment mechanism in each embodiment. Figure 20B is a diagram illustrating another embodiment 1 of the wave force adjustment mechanism in each embodiment.Figure 21A is a diagram illustrating another embodiment 2 of the structure of the floating body in each embodiment. Figure 21B is a diagram illustrating another embodiment 2 of the structure of the floating body in each embodiment. Figure 22A is a diagram illustrating another embodiment 2 of the structure of the floating body in each embodiment. Figure 22B is a diagram illustrating another embodiment 2 of the structure of the floating body in each embodiment. Figure 23 is a diagram illustrating another embodiment 2 of the structure of the floating body in each embodiment. Figure 24A is a diagram illustrating another embodiment 2 of the wheel provided on the floating body in each embodiment. Figure 24B is a diagram illustrating another embodiment 2 of the wheel provided on the floating body in each embodiment. Figure 24C is a diagram illustrating another embodiment 2 of the wheel provided on the floating body in each embodiment. Figure 25A is a diagram illustrating a structure in which the wheel and arm portion are formed on only one side in another embodiment 2 of the floating body in each embodiment. Figure 25B is a diagram illustrating a structure in which the wheel and arm portion are formed on only one side in another embodiment 2 of the floating body in each embodiment. Figure 26 is a diagram showing an example of the shape of the bottom surface in another embodiment 2 of the floating body of each embodiment. Figure 27A is a diagram for explaining another embodiment 3 of the slider provided on the floating body of each embodiment. Figure 27B is a diagram for explaining another embodiment 3 of the slider provided on the floating body of each embodiment. Figure 28 is a diagram showing an example of a stopper that restricts vertical movement in another embodiment 4 of the floating body of each embodiment. Figure 29A is a perspective view of a structure 1 including a wave force adjustment mechanism formed on the structure in another embodiment 5 of each embodiment. Figure 29B is a left side view of a structure 1 including a wave force adjustment mechanism formed on the structure in another embodiment 5 of each embodiment. Figure 29C is a right side view of a structure 1 including a wave force adjustment mechanism formed on the structure in another embodiment 5 of each embodiment. Figure 30 is a diagram showing an example of a wave force adjustment mechanism formed on the structure in another embodiment 5 of each embodiment, where the wave force adjustment mechanism is formed by a laminated swash plate structure.Figure 31A is a diagram showing an example of a wave force adjustment mechanism formed on two adjacent sides (wall members) of a structure (rectangular column structure) in another embodiment 5 of each embodiment. Figure 31B is a diagram showing an example of a wave force adjustment mechanism formed on two adjacent sides (wall members) of a structure (triangular prism structure) in another embodiment 5 of each embodiment. Figure 32A is a diagram for explaining the relationship between the rail section and slider and the floating body 10 in the structure (rectangular column structure) of another embodiment 5 of each embodiment. Figure 32B is a diagram for explaining the relationship between the rail section and slider and the floating body 10 in the structure (triangular prism structure) of another embodiment 5 of each embodiment. Figure 33 is a diagram showing an example of a first slit forming section and a second slit forming section having a laminated slanted plate structure in a structure having a triangular prism structure with a top surface formed from a triangle in another embodiment 5 of each embodiment. Figure 34A is a diagram showing an example of a V-shaped slit in another embodiment 6 of each embodiment. Figure 34B shows an example of a slit shape having an inverted V shape in another embodiment 6 of each embodiment. Figure 34C shows an example of a slit shape formed from two or more channels with different inclines in another embodiment 6 of each embodiment. Figure 35A shows an example of a structure in another embodiment 7 of each embodiment, in which the top surface is formed by a rectangular column using port facilities such as breakwaters. Figure 35B shows an example of a structure in another embodiment 7 of each embodiment, in which the top surface is formed by a triangular prism using port facilities such as breakwaters.

[0009] (1) In order to solve the above problems, an embodiment of the present invention is a wave power generation system that converts the potential energy of a fluid carried to a predetermined height by wave force into electricity via a power generation means, comprising: a floating body that floats on the water surface and whose vertical position changes due to the wave force; a limiting means that limits the lateral swaying of the floating body caused by the wave force; a transport means that transports the fluid to the predetermined height in accordance with the position change of the floating body; a discharge means that discharges the fluid transported by the transport means downward; and a power generation means that generates electricity using the potential energy of the fluid discharged by the discharge means.

[0010] With this configuration, the embodiment of the present invention can eliminate the influence of transverse waves on a floating body caused by wave force and extract only the longitudinal wave component (i.e., the vertical component) on the floating body, thereby enabling the floating body to move stably up and down based on the water pressure difference based on the longitudinal component of the wave.

[0011] Therefore, the embodiments of the present invention can appropriately transport fluid to a predetermined height (i.e., pump it up) even when the reference water level, such as changes in tide, fluctuates and the magnitude of the fluctuation is large.

[0012] In particular, the embodiments of the present invention allow for the reduction of the floating material, making it possible to generate electricity even with small waves.

[0013] Furthermore, "a specified height" refers to any height that allows for the securing of the potential energy necessary for generating electricity.

[0014] In other words, the "predetermined height" is the position where the frictional resistance (so-called frictional loss) generated when the fluid flows through the upward channel can be minimized as much as possible, and where the power generation unit can generate the desired amount of power using the potential energy of the fluid F raised by the upward channel.

[0015] Furthermore, "fluid" refers to any substance that has fluidity, and for example, "fluid" includes liquids such as water or oil, and semi-solids or solids such as polymer gels.

[0016] Furthermore, "power generation using potential energy" refers to methods that convert potential energy into electricity, such as generating electricity through hydroelectric power generation using a dynamo.

[0017] (2) Furthermore, an embodiment of the present invention has a configuration in which the limiting means comprises a member disposed near the side surface of the floating body and formed along the same direction as the direction in which the floating body moves up and down, and a structure formed perpendicular to waves arriving from the side, and one or more inlets formed on the surface of the structure from which the waves arrive, for allowing water to flow into the floating body side of the structure.

[0018] With this configuration, the embodiment of the present invention can limit the lateral force generated by waves and extract the vertical force generated by waves, thereby enabling the floating body to move up and down stably.

[0019] Furthermore, while it is preferable that the "structure" is integrally formed with a structure that encloses the floating object, such as a circular or box-shaped structure, it is not limited to such a structure as long as it has a surface that can withstand waves coming from the side.

[0020] Furthermore, a "structure" must have a height greater than or equal to the wave height from the water surface (including changes due to the water level, such as tides), but due to the relationship of water pressure generated by wave forces (because water pressure is less likely to be generated at depths greater than twice the wave height), it is not necessary for the structure to have a length that reaches the seabed or other bottom, but rather it is sufficient for it to have a length that reaches a depth of more than twice the wave height.

[0021] Furthermore, the "inlet" is provided to limit the amount of water flowing into the cylindrical member, as well as the force of waves generated laterally.

[0022] (3) Furthermore, an embodiment of the present invention has a structure in which a plurality of inlets are formed in the structure, and the plurality of inlets are arranged along the direction in which the height of the water surface where waves are generated changes.

[0023] With this configuration, the embodiment of the present invention can limit the lateral force generated by waves and extract the vertical force generated by the waves, thereby enabling stable vertical movement of the floating object.

[0024] Furthermore, "the direction in which the height of the water surface where waves are generated changes" basically refers to the same direction as the vertical direction in which the position of the floating object changes.

[0025] (4) Furthermore, an embodiment of the present invention has an inlet having an outer opening that opens on the outer surface of the structure and an inner opening that opens on the inner surface of the structure and is located at a different position in the vertical direction from the outer opening where the position of the floating body changes, and the inlet is arranged to be inclined from the outer opening toward the inner opening.

[0026] With this configuration, the embodiment of the present invention allows the incoming water to flow around the underside of the floating body, thereby limiting the lateral force generated by the waves and extracting the vertical force generated by the waves.

[0027] Furthermore, "arranged at an incline from the outer opening toward the inner opening" means that the position of the inner opening may be higher or lower than the outer opening. However, even if the water level fluctuates over time (for example, changes in tidal levels at sea level), at least one or more inner openings must be lower than the water level.

[0028] Furthermore, "an inner opening provided at different positions in the vertical direction where the position of the outer opening and the floating body change occur" means that the inlet should be inclined from the outer opening towards the inner opening. However, if the inlet is inclined downward from the outer opening towards the inner opening in the vertical direction where the position of the floating body changes, it is preferable that the upper end of the inner opening be lower than the lower end of the outer opening, and if it is inclined upward from the outer opening towards the inner opening, it is preferable that the lower end of the inner opening be higher than the upper end of the outer opening.

[0029] (5) Furthermore, an embodiment of the present invention is provided with one or more wall members on the outside of the surface of the structure where the inlet is formed, which exclude the lateral oscillation component of the wave force, and each wall member has one or more second inlets formed at a different height in the vertical direction from the plurality of first inlets formed on the surface of the structure or other adjacent wall members.

[0030] With this configuration, the embodiment of the present invention allows incoming waves (e.g., water or seawater) to wrap around the underside of the floating body, thereby limiting the lateral force generated by the waves and extracting the vertical force generated by the waves.

[0031] (6) Another embodiment of the present invention is provided in which a staircase member is provided having a staircase shape with a plurality of steps on the outside of the surface in which the inlet is formed, and the top surface of each step is open, and an opening is provided on the top surface of each step of the staircase member for allowing water to flow into the interior of the structure.

[0032] With this configuration, the embodiment of the present invention allows the incoming water to flow around the underside of the floating body, thereby limiting the lateral force generated by the waves and extracting the vertical force generated by the waves.

[0033] (7) Furthermore, an embodiment of the present invention has a configuration in which the stair member is configured to have a shape that extends in one direction or a shape that is formed along the periphery of the structure.

[0034] With this configuration, the embodiment of the present invention allows the incoming water to flow around the underside of the floating body, thereby limiting the lateral force generated by the waves and extracting the vertical force generated by the waves.

[0035] (8) Furthermore, an embodiment of the present invention further comprises a structure that surrounds the floating body with a wall surface, the floating body has one or more parallel surfaces that are parallel to the wall surface of the structure, and the parallel surfaces are provided with sliding means that slide along the wall surface.

[0036] With this configuration, the embodiment of the present invention allows the floating body to move smoothly up and down, thus enabling stable vertical movement of the floating body.

[0037] The "sliding means" may be, for example, wheels (including those with and without rails on the wall surface), or a shape that slides along a guide such as a groove or protrusion formed on the wall surface.

[0038] (9) Furthermore, an embodiment of the present invention comprises: a storage member having a cylindrical shape and hollow shape in which the fluid is stored inside; an upward passage for raising the fluid from the storage member to a predetermined height; a fixed member connecting the storage member and the upward passage, having an introduction pipe shaped for introducing the fluid stored in the storage member into the upward passage; and a push-up member that pushes the fluid stored in the storage member upward in accordance with the change in position of the floating body, and pushes the fluid from the storage member to the upward passage via the introduction pipe, wherein the push-up member has a push-up surface that is smaller in size than the diameter of the storage member, and has a tapered shape from the push-up surface downward.

[0039] With this configuration, the embodiment of the present invention can appropriately push the fluid in the storage section up to the inlet pipe using a floating body that moves stably up and down, thereby enabling efficient and stable power generation.

[0040] (10) Further, in the embodiment of the present invention, the conveying means includes a cylindrical and hollow storage member in which the fluid is stored, an upward flow path for raising the fluid from the storage member to the predetermined height, and a fixedly installed member for connecting the storage member and the upward flow path, the introduction pipe having a shape for introducing the fluid stored in the storage member into the upward flow path, and a pressing member for pushing the fluid stored in the storage member upward according to the change in the position of the floating body and pushing the fluid from the storage member into the upward flow path through the introduction pipe. The pressing member has a pressing surface larger than the diameter of the storage member and has a tapered shape upward from the pressing surface.

[0041] With this configuration, in the embodiment of the present invention, the fluid in the storage portion can be appropriately pushed up into the introduction pipe by using the floating body that moves up and down stably, so that power generation can be performed efficiently and stably.

[0042] (11) Further, the embodiment of the present invention further includes a deformable joining member that joins the storage member and the pressing member and accommodates the fluid leaking from the storage member and the introduction pipe when the storage member is pushed up by the pressing member. The joining member has a tapered shape that tapers from the storage member toward the pressing member, and when the pressing member moves up and down, it has a configuration of rolling up inward from the bottom to the top or rolling down from the top to the bottom while maintaining the joining of the storage member and the pressing member.

[0043] With this configuration, in the embodiment of the present invention, even when the gap formed by the pressing member and the storage portion is deformed based on the relative position change between the lower end of the storage portion and the upper surface of the pressing member due to the up and down movement of the pressing member, it is possible to prevent the fluid stored in the storage portion from leaking out through the gap.

[0044] Therefore, in the embodiment of the present invention, the pressing member can be moved up and down stably, and accordingly, the fluid in the storage portion can be accurately pushed up into the introduction pipe.

[0045] (12) Further, an embodiment of the present invention is a structure in which at least the floating body, the conveying means, the sending-out means, and the power generation means are incorporated, having a multilayer structure in which a plurality of layers are stacked in the vertical direction, and each layer is assembled without being fixed to the lower layer and has a structure independent for each layer.

[0046] With this configuration, in an embodiment of the present invention, in a structure that tends to be long in the upward direction, when an earthquake or the like occurs, each layer can sway alternately and absorb vibrations, so that the entire facility can be protected, and as a result, power generation can be stably performed.

[0047] (13) Further, an embodiment of the present invention is a structure in which at least the floating body, the conveying means, the sending-out means, and the power generation means are incorporated, and further includes a structure in which the conveying means, the sending-out means, and the power generation means are integrally suspended from the top surface of the structure in a columnar manner.

[0048] With this configuration, a column structure and a pendulum structure can be formed, so that the rolling of a wave power generation system that tends to be structurally high can be suppressed by using potential energy, and as a result, seismic strengthening can be achieved.

[0049] (14) Further, an embodiment of the present invention further includes a structure that surrounds the floating body with a wall surface, and floating means for floating the structure formed on a surface different from the wave-facing surface where the waves arrive around the structure.

[0050] With this configuration, in an embodiment of the present invention, in a sea area at a distance from the shore, a deep sea area, a sea area with a coral reef, or a sea area having a soft seabed ground, etc., where there is no fixed installation building or the foundation cannot be driven, a structure can be installed, so that a wave power generation system can be formed even in such a sea area.

[0051] (15) In another embodiment of the present invention, the transport means is formed as a plurality of means for transporting the fluid to the predetermined height in response to a change in the position of a single floating body, or in response to a change in the position of each of the floating bodies in a plurality of floating bodies, the discharge means collects the fluid transported by the plurality of transport means and discharges it downward, and the power generation means generates electricity using the potential energy of the fluid discharged by the discharge means.

[0052] With this configuration, the embodiment of the present invention can pump up and collect more fluid to a predetermined height compared to using a single transport means by using multiple transport means, thus enabling more efficient power generation.

[0053] (16) In addition, an embodiment of the present invention is provided in which a plurality of the power generation means are provided, and when the discharge means discharges downward, the collected fluid is discharged to each of the power generation means.

[0054] With this configuration, the embodiment of the present invention can also distribute power generation, thus eliminating the need to excessively enlarge the power generation means and reducing manufacturing costs.

[0055] (17) In addition, an embodiment of the present invention has a configuration in which the floating body has a shape in which the bottom area increases upward from the surface that receives the wave force.

[0056] With this configuration, in the embodiment of the present invention, when the floating body 10 rises due to wave force, it moves upward at an accelerating rate, and the fluid can be raised based on the energy obtained by this movement.

[0057] Therefore, the embodiments of the present invention can transport a large amount of fluid to the power generation means in a short time, thereby increasing the power generation efficiency.

[0058] (18) In addition, an embodiment of the present invention has a structure comprising: a first surface on which the waves arrive and on which the outer opening is formed; a second surface provided opposite to the first surface and on which the inner opening is formed; and an inflow control means for changing the positional relationship between the first surface and the second surface and controlling the inflow of water into the inlet.

[0059] With this configuration, the embodiment of the present invention can suppress the amount of water flowing in from the inlet (including the case where the amount of water flowing in is 0) if (A1) the distance between the first surface and the second surface is increased and the slope of the inlet is reduced, (A2) the distance between the first surface and the second surface is reduced (when they are in contact (distance = 0)), or (A3) the height of the inner opening or outer opening.

[0060] Therefore, the embodiments of the present invention can also reduce the vertical force generated by wave force (including reducing wave force to zero), so when it is desired to suppress the output of power generation, such as during maintenance, the operation of the power source that generates power can be suppressed (including stopping).

[0061] (19) In another embodiment of the present invention, the structure has a laminated inclined plate structure in which at least the inclined portion of the inlet is formed by a plurality of plate-like members that are stacked with a predetermined gap in between, having an inclination in the height direction in which the height of the water surface changes, and the inflow control means controls the inflow of water into the inlet by changing the positional relationship between the first surface and the second surface, thereby adjusting at least the inclination angle of the inclined portion of each plate-like member.

[0062] With this configuration, the embodiment of the present invention can suppress the amount of water flowing in from the inlet, or slow down the inflow velocity of the water. Therefore, when it is desired to suppress the output of power generation, such as during maintenance, the vertical movement of the floating body 10 can be reduced or stopped, thereby suppressing (including stopping) the operation of the power that generates electricity.

[0063] Therefore, in the embodiment of the present invention, when it is desired to stop power generation, such as during maintenance, the operation of the entire system can be stopped from the power source.

[0064] (20) Furthermore, an embodiment of the present invention has a configuration in which the plurality of inlets include: a first inlet in which the inner opening is formed at a first inclination angle that is higher in the height direction than the outer opening; and a second inlet in which the outer opening is formed at a second inclination angle that is different from the first inclination angle and is higher in the height direction than the inner opening.

[0065] With this configuration, the embodiment of the present invention can suppress transverse waves for all types of waves, including wind waves (triangular waves), swells (rounded waves), irregular waves, breaking waves that change as the water depth decreases, or rocky shore waves, while also appropriately generating wave force on the underside of the floating body.

[0066] (21) Furthermore, an embodiment of the present invention has a configuration in which the inlet is formed from at least two or more flow paths having different inclination angles.

[0067] With this configuration, the embodiment of the present invention, as described above, can suppress transverse waves for all types of waves, such as wind waves (triangular waves), swells (rounded waves), irregular waves, breaking waves or shore waves that change as the water depth decreases, while also appropriately generating wave force on the underside of the floating body.

[0068] (22) Furthermore, an embodiment of the present invention has a configuration in which, of the two or more flow paths constituting the inlet, the inclination angle of one flow path is smaller than or zero than the inclination angles of the other flow paths.

[0069] With this configuration, the embodiment of the present invention can improve the rigidity of each inlet against wave forces and the like that generated when water flows into each inlet.

[0070] (23) In addition, an embodiment of the present invention has a configuration in which the sliding means is formed by wheels that roll on the wall surface.

[0071] With this configuration, the embodiment of the present invention allows the floating body to move smoothly up and down by the wheels, thus enabling stable vertical movement of the floating body.

[0072] (24) Furthermore, an embodiment of the present invention has a configuration in which the sliding means is formed at a position higher than the water surface.

[0073] This configuration eliminates the causes of failure due to water pressure or water-related issues such as rust and corrosion, by preventing sliding means such as wheels from being submerged in water.

[0074] (25) Furthermore, an embodiment of the present invention has a configuration in which a stopper member is formed in the structure to suppress the vertical movement of the floating body.

[0075] With this configuration, the embodiment of the present invention can suppress excessive vertical movement of the floating body, thereby preventing damage to structures and other components when the floating body moves up and down more than expected due to rough weather or other reasons.

[0076] Embodiments of the present invention will be described below with reference to the drawings.

[0077] The embodiments described below are examples of applying the wave power generation system of the present invention to a wave power generation system with a tower structure installed in a coastal area (hereinafter referred to as the "tower-structured wave power generation system"). However, the present invention is not limited to the following forms, within the scope of its technical concept.

[0078] [A1] First Embodiment [A1.1] Outline Configuration of the Tower-Type Wave Power Generation System First, the outline configuration of the first embodiment of the tower-type wave power generation system S1 according to the present invention will be described using Figure 1.

[0079] Figure 1 is a schematic diagram of the tower-type wave power generation system S1 of this embodiment (including the upward or downward movement of the floating body and the movement of the fluid F).

[0080] The tower-type wave power generation system S of this embodiment is a wave power generation system that is fixedly installed on a breakwater or other structure on the outside of the breakwater, or fixedly installed on a foundation fixed to the seabed, and generates electricity using the energy of waves (i.e., wave power) generated on the ocean surface.

[0081] In particular, the tower-type wave power generation system S is a wave power generation system (for example, a wave-type hydroelectric power generation system that generates electricity such as hydroelectric power generation using a dynamo, etc.) that converts the potential energy of a fluid F carried to a predetermined height by wave force into electricity, and has a configuration that allows for the circulation and reuse of the fluid F.

[0082] In other words, the tower-type wave power generation system S of this embodiment uses wave power as the power source to transport the fluid F to a predetermined height, and therefore does not require the use of electricity as the power source as in the conventional technology. As a result, it has a configuration that can reduce electricity costs and lower running costs.

[0083] Furthermore, the tower-type wave power generation system S of this embodiment is a wave power generation system as described above, which has a configuration that removes the transverse wave component from the waves (wave force) that move the floating body 10 up and down to extract the longitudinal wave component, and is capable of stably moving the floating body 10 up and down based on the water pressure difference based on the longitudinal wave component.

[0084] Specifically, the tower-type wave power generation system S of this embodiment, as shown in Figure 1, has the following configuration: (A1) a floating body 10 that floats on the water surface and whose vertical position changes due to wave force; (A2) a wave force adjustment mechanism 400 that limits the lateral swaying of the floating body 10 caused by wave force; (A3) a pump-up mechanism 100 that transports fluid F to a predetermined height in accordance with the position change of the floating body 10; (A4) a power generation channel 200 that sends the fluid F transported by the pump-up mechanism 100 downwards; and (A5) a power generation unit 300 that generates electricity using the potential energy of the fluid F sent out by the power generation channel 200.

[0085] In this embodiment, an example using water as the fluid F will be described, but any fluid with fluidity is acceptable. For example, in addition to water, liquids such as oil, and semi-solids or solids such as polymer gels may also be used.

[0086] In particular, compared to the case where the fluid F is water, the frictional resistance can be reduced, and the wave power generation system can be operated efficiently. Therefore, a mixture containing an additive that can reduce the frictional resistance that occurs when the fluid flows through various channels (an additive that produces the so-called TOMS effect) may be used (for example, a mixture of water containing a chain polymer, soapy water, etc.).

[0087] [A1.2] Structure Next, the structure 1 in the tower-type wave power generation system S1 of this embodiment will be described with reference to Figure 2.

[0088] Figure 2 is a diagram illustrating the structure of the structural element 1 of the tower-type wave power generation system S1 of this embodiment.

[0089] As shown in Figure 1, structure 1 is a tower structure made of steel or the like, and has a cylindrical shape that surrounds the floating body 10. It is fixed to a breakwater set up on the sea or a foundation driven into the seabed by fasteners (not shown).

[0090] Furthermore, structure 1 is constructed such that a portion of it is below the water surface (i.e., below sea level) and the other portion is above the water surface (i.e., above sea level).

[0091] In particular, the floating body 10, the pump-up mechanism 100, the power generation channel 200, and the power generation unit 300 are formed inside the tower of structure 1, and are integrally formed with the wave force adjustment mechanism 400.

[0092] Furthermore, the structure 1 has a cylindrical shape that surrounds the floating body 10, and this shape restricts the lateral movement of the floating body 10 while restricting its vertical movement.

[0093] On the other hand, structure 1, like a five-story or three-story pagoda, has a multi-layered structure in which multiple layers are stacked vertically, and each layer is assembled without being fixed to the layer below, and each layer is an independent structure (i.e., a structure in which each layer is not connected by continuous pillars), forming a cylindrical shape.

[0094] In other words, as shown in Figure 2, structure 1 has a cylindrical structure in which each layer shakes alternately to absorb vibrations when an earthquake or other event occurs.

[0095] Furthermore, the structure 1 may have a structure (pendulum structure) in which the pump-up mechanism 100, the power generation flow path 200, and the power generation unit 300 are integrally suspended from the top surface 5 in a central column-like manner, as a structure to further enhance earthquake resistance.

[0096] In other words, the structure 1 has a configuration that can suppress long-period ground motion by having the pump-up mechanism 100, power generation channel 200, and power generation unit 300 suspended from the top surface function as a central column and a pendulum.

[0097] On the other hand, as shown in Figure 1, a wave force adjustment mechanism 400 is formed on the side surface of the cylindrical structure 1, near the water surface (for example, the sea surface), to limit the lateral swaying of the floating body 10 caused by wave forces.

[0098] In particular, the wave force adjustment mechanism 400 of this embodiment is configured to eliminate the influence of transverse waves on the floating body 10 generated by wave force and to extract only the longitudinal wave component (i.e., the vertical component) on the floating body 10, and has a configuration that enables the floating body to move up and down stably based on the water pressure difference based on the longitudinal component of the wave.

[0099] Further details of the wave force adjustment mechanism 400 in this embodiment will be described in a later section.

[0100] [A1.3] Floating Body Next, the floating body 10 of this embodiment will be described using Figures 3A and 3B.

[0101] Figure 3A is a diagram illustrating the structure of the floating body 10 in this embodiment, and is a perspective view of the floating body 10, Figure 3B is a top view of the floating body 10, and Figure 3C is a side view of the floating body 10.

[0102] The floating body 10 is an object that floats on the water surface inside the structure 1, and has a configuration that allows it to move up and down in response to the wave force it receives, while its vertical movement is restricted within the structure 1.

[0103] In particular, the floating body 10 is formed from, for example, a resin material, a rubber material, or a rust-proofed metal material, and has a hollow, roughly box-shaped form (rectangular in Figure 1). As shown in Figure 1, at least a portion of the floating body 10 is formed to float on the water surface.

[0104] Furthermore, as shown in Figures 3A, 3B, and 3C, the floating body 10 has a central portion that is recessed downwards, forming a rectangular recess 12, and surrounding it are wall surfaces 13 that are parallel to each wall surface 7 that constitute the structure 1, and the pump-up mechanism 100 is placed in the recess 12.

[0105] The size of the floating body 10 is not particularly limited. However, the length of the floating body 10 in the direction along the wave propagation direction (wave direction) (in Figure 1, the length of the floating body 10 in the left-right direction) is preferably shorter than the wavelength of the wave (for example, shorter than half a wavelength).

[0106] Furthermore, by having such a length, the floating body 10 can effectively pump up the fluid F stored in the storage section 120, compared to, for example, the case where the length of the floating body 10 in the wave direction is longer than the wavelength of the wave.

[0107] Furthermore, each wall surface 13 may be provided with wheels (trolleys) 14 that roll along the wall surface 7 to facilitate the vertical movement of the floating body 10.

[0108] In particular, the wheels 14 do not necessarily have to be provided on each of the wall surfaces 13 that correspond to each of the wall surfaces 7 that constitute the structure 1; at least one wheel 14 is sufficient, but it is preferable that they be provided corresponding to a pair of opposing wall surfaces 7.

[0109] Furthermore, in this embodiment, there are no restrictions on the number or placement of the wheels 14 formed on the wall surface 13.

[0110] For example, it is preferable to arrange an appropriate number of wheels 14 in positions such that the distance between the wall 7 and the wall 13 remains constant when the floating body 10 moves up and down, such as by arranging four wheels 14 on each wall 13 at positions that are symmetrical with respect to the center of gravity or center of each wall 13.

[0111] The wheels 14 may be arranged in pairs on the upper part of the wall surface 13, or, as described above, if four wheels 14 are arranged, two on the upper part of the wall surface 13 may be arranged on the upper part of the wall surface 13, and a bottom plate member may be formed on the bottom surface of the floating body 10 parallel to the wave-facing surface, with a total of four wheels provided at the position where the ends of the bottom plate member face the wall surface 7.

[0112] Furthermore, for example, the four wheels 14 may be provided on the upper part of the wall surface 13 and on arm members extending from the bottom surface of the floating body 10 to the wall surface 13, respectively.

[0113] [A1.4] Pump-up mechanism Next, the pump-up mechanism 100 of this embodiment will be described with reference to Figures 4A and 4B.

[0114] Figure 4A is a diagram illustrating the bonding membrane 121 of the pump-up mechanism 100 of this embodiment, and is a perspective view of the bonding membrane 121 itself. Figure 4B is a diagram illustrating the change in state of the bonding membrane 121 due to the vertical movement of the push-up mechanism 110.

[0115] (Outline of structure) The pump-up mechanism 100 is formed approximately in the center of the structure 1 and has a configuration that transports the fluid F to a predetermined height by wave force when the floating body 10 is subjected to wave force, and also constitutes a central column-like part of the structure 1.

[0116] In particular, the pump-up mechanism 100 is made of, for example, a resin material or a rust-proofed metal material, and is provided on the upper surface of the floating body 10 and fixed to the top surface 5 of the structure 1 with respect to a fixing member (not shown).

[0117] Furthermore, as shown in Figure 1, the pump-up mechanism 100 includes a push-up mechanism 110, a storage section 120, an introduction pipe 130, an upward flow path 140, and a first valve 150.

[0118] In particular, the pump-up mechanism 100 includes: (A1) a hollow, cylindrical storage section 120 in which fluid F is stored; (A2) an upward flow path 140 for raising the fluid F from the storage section 120 to a predetermined height; (A3) a fixed member connecting the storage section 120 and the upward flow path 140, having a shape for introducing the fluid F stored in the storage section 120 into the upward flow path 140; and (A4) an upward pushing mechanism 110 that pushes the fluid F stored in the storage section 120 upward in accordance with the change in position of the floating body 10, and pushes the fluid F from the storage section 120 to the upward flow path 140 via the introduction path 130.

[0119] Furthermore, the push-up mechanism 110 has a push-up surface that is smaller in size than the diameter of the storage section 120, and has a tapered shape that extends downward from the push-up surface.

[0120] (Push-up mechanism) The push-up mechanism 110 is formed by joining it to the floating body 10 at approximately the center of the upper surface of the floating body 10, has a convex shape that points upward, and is sized to fit inside the storage section 120 and the introduction pipe 130.

[0121] In particular, the push-up mechanism 110 has a cylindrical upper section that tapers towards the inside of the storage section 120 and the introduction pipe 130, and the upper part of the push-up mechanism 110 is configured to be housed inside the storage section 120 and the introduction pipe 130.

[0122] The size of the push-up mechanism 110 is not particularly limited, as long as it can transport the fluid F in the storage section 120 to a predetermined height via the upward passage 140.

[0123] (Storage section) The storage section 120 is located below the introduction pipe 130 and above the push-up mechanism section 110, and is configured to house the push-up mechanism section 110 inside when the floating body 10 moves upward in response to wave force.

[0124] In particular, the storage section 120 is formed of, for example, a resin material or a rust-proofed metal material, and has a hollow shape (for example, a hollow cylindrical closed space) and is formed in a cylindrical shape, and has a configuration that stores the fluid F that is sent out from the power generation flow channel section 200 and flows into it.

[0125] Furthermore, the storage unit 120 is configured to house the lifting mechanism 110 inside while simultaneously sending the fluid F stored inside to the introduction pipe 130 when the lifting mechanism 110 is pushed up from below due to the upward movement of the floating body 10 generated in response to the wave force.

[0126] In other words, the storage section 120 has an inner diameter larger than the outer diameter of the push-up mechanism section 110 (i.e., the outer diameter of the hollow shape formed inside), and when the push-up mechanism section 110 is pushed upward in response to the wave force generated by the floating body 10, the hollow bottom surface is pushed up from below as the push-up mechanism section 110 rises, and the fluid F stored inside is sent upward by this pushing action, while the push-up mechanism section 110 is simultaneously housed inside.

[0127] On the other hand, as shown in Figures 1, 4A, and 4B, the storage section 120 has a bonding membrane 121 that connects the periphery of the upper surface of the push-up mechanism section 110 to the lower end of the storage section 120.

[0128] In particular, the bonding film 121 is provided to seal the gap formed by having an inner diameter larger than the outer diameter of the push-up mechanism 110, as shown in Figure 1.

[0129] In other words, the bonding membrane 121 is provided to prevent the fluid F stored in the storage portion 120 from leaking out of the gap even if the gap formed between the lifting mechanism 110 and the storage portion 120 deforms due to the relative positional change between the lower end of the storage portion 120 and the upper surface of the lifting mechanism 110 caused by the vertical movement of the lifting mechanism 110.

[0130] Specifically, the bonding film 121 is formed to be deformable by a deformable cloth, rubber, or a laminate of these (for example, a three-layer structure of rubber, cloth, rubber from the outside to the inside, or similarly a five-layer structure of rubber, cloth, rubber, cloth, rubber).

[0131] Furthermore, as shown in Figures 4A and 4B, the bonding membrane 121 has flanges 122 and 123 at both ends and is fixed in a deformable manner by being joined to the flange 125 provided on the periphery of the opening side of the storage section 120 and the flange 115 provided on the periphery of the upper surface 111 of the push-up mechanism section.

[0132] In other words, the bonding membrane 121 is formed to be deformable by joining the storage portion 120 and the push-up mechanism portion 110, and it contains the fluid F that leaks out from the storage portion 120 and the introduction pipe 130 when the storage portion 120 is pushed up by the push-up mechanism portion 110.

[0133] Furthermore, as shown in Figures 4A and 4B, the bonding membrane 121 has a tapered shape that narrows from the storage portion 120 towards the push-up mechanism portion 110, and when the push-up mechanism portion 110 moves up and down, it has a configuration that allows it to curl up inward from bottom to top or curl down from top to bottom while maintaining the bond between the push-up mechanism portion 110 and the storage portion 120.

[0134] On the other hand, as shown in Figures 1, 4A, and 4B, the storage portion 120 is formed along the circumference of the bonding membrane 121 and has a guide member 127 formed at the lower end of the storage portion 120 (i.e., the periphery of the bottom surface of the storage portion 120).

[0135] In particular, the guide member 127 has the function of guiding the deformation direction of the bonding film 121 so that the bonding film 121 does not spread radially outward when the bonding film 121 is pushed up by the push-up mechanism 110.

[0136] (Inlet pipe) The inlet pipe 130 is formed in a hollow shape and constitutes a flow channel that sends the fluid F discharged from the storage section 120 to the rising flow channel 140. The upper periphery is joined to the rising flow channel 140, and as described above, the lower periphery is joined to the storage section 120.

[0137] In particular, the inlet pipe 130 is made of, for example, a resin material or a rust-proofed metal material, and in order to reduce the frictional resistance (so-called reduction loss) that occurs when the fluid F is sent from the storage section 120 to the rising channel 140, the diameter at the joint with the rising channel 140 is the same as that of the rising channel 140, and the channel has a trumpet shape in which the diameter of the channel increases as it goes downwards.

[0138] Furthermore, although the method of installing the inlet pipe 130 is arbitrary, it is preferable to install the inlet pipe 130 near the water surface, as shown in Figure 1, in order to facilitate the movement of the housing push-up mechanism 110 in accordance with the long-period vibrations of the waves.

[0139] Furthermore, compared to the case where the inlet pipe 130 is installed at a relatively deep position below the water surface, it is possible to easily allow the fluid F inside the inlet pipe 130 and the rising channel 140 to flow, and the pump-up mechanism 100 can be operated effectively.

[0140] (Upward flow path) The upward flow path 140 is a flow path that sends the fluid F discharged from the introduction pipe 130 to a predetermined height, and has an open end at the upper end 142 and the lower end 141, and has a pipe shape (for example, a circular pipe shape) that extends linearly in the vertical direction.

[0141] In particular, the upward channel 140 stores the fluid F formed at the predetermined height and sends the fluid F to the power generation channel section 200 (specifically, the upper pool 210) for use in power generation.

[0142] Furthermore, the upward flow path 140 has a lower end 141 that is connected to the introduction pipe 130, and an upper end 142 that outputs fluid F to the power generation flow path section 200.

[0143] In particular, the upper end 142 is formed in a slope shape having a predetermined length, extending from a predetermined height toward the power generation flow channel 200 (specifically, the upper pool 210) located at a lower position from the upper end 142.

[0144] The predetermined height is a position that minimizes frictional resistance (so-called friction loss) generated when the fluid F flows through the upward channel 140, and is a position in which the power generation unit 300 can generate a desired amount of power using the potential energy of the fluid F raised by the upward channel 140.

[0145] For example, the length from the lower end 141 to the upper end 142 is set to approximately 10 m to 100 m, and the upward flow path 140 is configured to push the fluid F up to the power generation flow path section 200 (specifically, the upper pool 210) formed at the upper end 142.

[0146] The upward flow path 140 may have the same flow path diameter as the flow path diameter at the upper end of the inlet pipe 130, but it is preferable that the flow path diameter be smaller than the flow path diameter at the upper end of the inlet pipe 130.

[0147] (First valve) The first valve 150 is a valve that restricts the backflow of fluid F from the rising passage 140 to the inlet pipe 130, and is constructed using a known valve body, is installed inside the rising passage 140, and is fixed to the rising passage 140 by a fixing device or the like.

[0148] Furthermore, the first valve 150 prevents the fluid F from flowing from the rising passage 140 into the inlet pipe 130.

[0149] [A1.5] Power Generation Flow Channel Next, the power generation flow channel 200 of this embodiment will be described.

[0150] (Outline of structure) The power generation flow channel section 200 is a means for sending the fluid F transported by the pump-up mechanism section 100 toward the power generation section 300 and storage section 120 located below, and also constitutes a central pillar-like part of the structure 1.

[0151] In particular, the power generation channel section 200 is formed of, for example, a resin material or a rust-proofed metal material, and is provided near the pump-up mechanism section 100 and fixed to the top surface 5 of the structure 1 by fasteners or the like.

[0152] Furthermore, as shown in Figure 1, the power generation flow channel section 200 includes an upper pool 210, a descending flow channel 220, a housing section 230, a lower pool 240, a return flow channel 250, and a second valve 260.

[0153] (Upper pool) The upper pool 210 is a means for temporarily storing the fluid F transported by the pump-up mechanism 100, and is formed, for example, as a box-shaped body (or a hollow cylindrical body, etc.) with an open top.

[0154] Furthermore, as shown in Figure 1, the upper pool 210 is located below the upper end 142 on the downstream side of the rising channel 140. For example, it is located directly below the upper end 142 on the downstream side of the rising channel 140, and is positioned at a predetermined distance from the rising channel 140.

[0155] Furthermore, a first connection port 211 is provided on the bottom surface of the upper pool 210 for connecting the descending channel 220 to the upper pool 210.

[0156] (Downward flow path) As shown in Figure 1, the downward flow path 220 is located below the upper pool 210 and is a flow path that sends the fluid F sent from the pump-up mechanism 100 downwards through the upper pool 210 to drive the power generation unit 300 and then sends it to the lower pool 240.

[0157] In particular, the descending channel 220 has a tubular shape (for example, a circular shape) that extends linearly in the vertical direction from the first connection port 211 to the second connection port 221 located directly above the lower pool 240 for injecting the fluid F.

[0158] Furthermore, a housing section 230 for housing the power generation unit 300 is provided on the flow path of the descending channel 220, near the second connection port 221.

[0159] Furthermore, the second connection port 221, like the upper end 142 of the rising channel 140, is formed in a slope shape with a predetermined length, extending from a predetermined height toward the lower pool 240 which is located at a lower position from the second connection port 221.

[0160] (Housing section) As shown in Figure 1, the housing section 230 is provided on the flow path of the descending flow path 220, has a hollow shape with the side facing the descending flow path 220 open, and has a shape and size that allows it to house the power generation section 300.

[0161] (Lower Pool) The lower pool 240 is a storage means for temporarily storing the fluid F sent from the descending channel 220, and is formed, for example, as a box-shaped body (or a hollow cylindrical body, etc.) with an open top, similar to the upper pool 210.

[0162] Furthermore, as shown in Figure 1, the lower pool 240 is located directly below the downstream end of the descending channel 220 and is positioned at a predetermined distance from the descending channel 220.

[0163] Furthermore, a third connection port 241 is provided on the bottom surface of the lower pool 240 for connecting the return channel 250 to the lower pool 240.

[0164] (Return channel) The return channel 250 is a channel that returns the fluid F sent from the lower pool 240 to the storage section 120, and has a pipe shape (for example, a circular pipe shape) with open ends at both ends.

[0165] Furthermore, as shown in Figure 1, the return channel 250 is located below the lower pool 240, and the upstream end of the return channel 250 is connected to the lower pool 240 via the third connection port 241.

[0166] Then, as shown in Figure 1, the other end of the return channel 250 is connected to the middle section of the inlet pipe 130 on the downstream side.

[0167] (Second valve) The second valve 260 is a valve that restricts the backflow of fluid F from the storage section 120 to the return passage 250, and is constructed using a known valve body. As shown in Figure 1, it is located downstream of the return passage 250 and is fixed to the return passage 250 by a fastener or the like.

[0168] Furthermore, the second valve 260 prevents the fluid F from flowing from the storage section 120 into the return passage 250.

[0169] [A1.6] Power Generation Unit Next, the power generation unit 300 of this embodiment will be described.

[0170] The power generation unit 300 is a power generation means that generates electricity by being driven by the potential energy of the fluid F delivered in the power generation channel 200, and includes a dynamo and a power generation substrate (not shown).

[0171] The dynamo is the basic structure of the power generation unit 300 and is constructed using, for example, a known dynamo having a rotor that can generate power in one direction. It is housed in the housing unit 230 and fixed to the housing unit 230 by fasteners or the like.

[0172] The power generation substrate is a substrate on which electrical circuits (not shown) for realizing various functions of the power generation unit 300 are mounted, and is constructed using, for example, a known substrate for power generation devices.

[0173] The power generation board is located outside (or inside) the housing section 230 and is fixed to the housing section 230 with fasteners or the like.

[0174] Furthermore, the power generation board also has a power conversion unit and a power output unit mounted on it. Of these, the power conversion unit is a power conversion means that converts the power generated by the dynamo into a predetermined power, and is electrically connected to the dynamo via wiring (not shown).

[0175] The power output unit is a power output means for outputting the power converted by the power conversion unit to an external device (not shown), and is electrically connected to the external device via wiring (not shown).

[0176] [A1.7] Wave Force Adjustment Mechanism [A1.7.1] Basic Configuration Next, the basic configuration of the wave force adjustment mechanism 400 of this embodiment will be described using Figures 5A and 5B.

[0177] Figure 5A is a diagram illustrating the basic configuration of the wave force adjustment mechanism 400 of this embodiment, and is a side view of the structure 1 including the upward-facing slit-shaped wave force adjustment mechanism 400. Figure 5B is a diagram illustrating the basic configuration of the wave force adjustment mechanism 400, and is a side view of the structure 1 including the downward-facing slit-shaped wave force adjustment mechanism 400.

[0178] (Configuration of the wave force adjustment mechanism) As described above, the wave force adjustment mechanism 400 of this embodiment is a member that eliminates the influence of transverse waves on the floating body 10 generated by wave force and extracts only the longitudinal wave component (i.e., the vertical component) on the floating body 10, and is formed on one surface of the structure 1 (the wave-facing surface in the case of a rectangle in Figure 1) with a predetermined thickness (for example, about 0.5 m to 1.0 m) in the direction of wave propagation.

[0179] In other words, the wave force adjustment mechanism 400 is a structure disposed near the side surface of the floating body 10, formed along the same direction as the vertical movement of the floating body 10, formed perpendicular to waves arriving from the side, and integrally formed with the wall member 2 formed on the wave-facing surface of the structure 1.

[0180] Furthermore, the wave force adjustment mechanism 400 has a plurality of slits 410 arranged in parallel in the vertical direction, and each slit 410 is formed in the wave-facing surface within a vertical range from the position where the highest wave height reaches with respect to the water surface to a position 4 m deep from the water surface.

[0181] For example, as shown in Figure 2, when the tower-type wave power generation system S1 is installed on the coast, the wave power adjustment mechanism 400 has multiple slits 410 arranged in parallel in the vertical direction, ranging from a position above the wave height at high tide to a water depth of 4 m from the water surface at low tide.

[0182] In particular, the wave force adjustment mechanism 400 (specifically, at least the area in which the slit 410 is formed) has a height greater than the wave height from the water surface (or the water surface after each fluctuation, if any), including changes due to tidal levels. However, due to the relationship of water pressure generated by wave force (water pressure is less likely to be generated at water depths of more than twice the wave height), it is not necessary for it to have a length to the seabed or other bottom, but rather to have a length to a water depth of more than twice the wave height.

[0183] In this embodiment, the wave force adjustment mechanism 400 is formed integrally with the box-shaped structure 1 as one surface of the structure 1. However, it may also be integrally formed with a structure that surrounds a floating body 10, such as a circular one, or it may be independently formed as a wall member in a U-shaped structure 1 having an opening on the wave-facing side.

[0184] (Configuration of each slit) Each slit 410 is formed in a rectangular shape with the transverse direction perpendicular to the arrangement direction relative to the wave-facing surface as its longitudinal direction, and functions as an inlet formed on the surface from which the waves arrive (i.e., the wave-facing surface) to allow the waves (water flow) to flow into the floating body 10 side of the structure 1.

[0185] Specifically, each slit 410 is arranged along the direction in which the height of the water surface where waves are generated changes (i.e., the same direction as the vertical direction in which the position of the floating body 10 changes).

[0186] In other words, each slit 410 is provided to limit the amount of water flowing into the cylindrical member, as well as the force of the waves generated laterally (the force that strikes the wave-facing surface).

[0187] Furthermore, each slit 410 has a predetermined depth in the direction of wave propagation (i.e., the same length as the thickness of the wave force adjustment mechanism 400) and a predetermined inclination (due to the wave force adjustment mechanism 400 having a predetermined thickness).

[0188] In particular, as shown in Figures 2, 5A, and 5B, each slit 410 has an outer opening 411 that opens on the outer surface of the wave force adjustment mechanism 400 (i.e., the surface facing the wave direction), and an inner opening 412 that opens on the inner surface of the wave force adjustment mechanism 400 (i.e., the inner surface on the floating body 10 side), and is provided at different positions in the vertical direction where the position of the floating body 10 changes from the outer opening 411, and has an inclined shape from the outer opening 411 to the inner opening 412.

[0189] The depth of this component (specifically, the length of the wave force adjustment mechanism 400) is not particularly limited as long as it is an appropriate length; for example, it may be a few millimeters, but a length that can withstand the energy of incoming waves is preferred.

[0190] Furthermore, while the angle of inclination of each slit 410 is not particularly limited, it is preferable that the lower end of the inner opening 412 is positioned higher than the upper end of the outer opening 411, as shown in Figures 2 and 5A. However, as shown in Figure 5B, instead of the shape in which the lower end of the inner opening 412 is positioned higher than the upper end of the outer opening 411 (hereinafter referred to as the "upward-facing slit shape"), the inner opening 412 may be positioned lower than the lower end of the outer opening 411 (hereinafter referred to as the "downward-facing slit shape").

[0191] [A1.7.2] Basic Principles Next, the basic principles of the wave force adjustment mechanism 400 of this embodiment will be explained.

[0192] For example, if structure 1 is located in a coastal area and a wave is pushing in from offshore toward the coast, when the wave, which includes longitudinal and transverse components, reaches the surface of structure 1 where the wave force adjustment mechanism 400 is formed (i.e., the wave-facing surface), as shown in Figures 5A and 5B, some of the waves will have their path obstructed and some of the waves will flow into each slit 410.

[0193] The waves that flow into each slit 410 then pass through each slit 410, changing their direction of travel upward or downward (specifically, diagonally upward or diagonally downward), and enter the structure 1 (i.e., the inside of the wave force adjustment mechanism 400 in which the floating body 10 is floating).

[0194] At this time, the waves that enter the structure 1 wrap around to the underside of the floating body 10, resulting in waves whose transverse wave components are canceled out, causing the floating body 10 to move upward.

[0195] On the other hand, when a receding wave occurs and the wave propagates from the coast towards the open sea, the water (seawater) on the surface of the water (seawater) inside the structure 1 is discharged outside the structure 1 through each slit 410.

[0196] At this time, the water level inside the structure 1 (i.e., the floating surface on which the floating body 10 is floating) drops, and as the water depth inside the structure 1 becomes shallower, the floating body 10 moves downward.

[0197] The wave force adjustment mechanism 400, having the configuration described above, can limit the lateral force generated by waves and extract the vertical force generated by waves, thereby enabling the floating body to move up and down stably.

[0198] [A1.7.3] Modified Wave Force Adjustment Mechanism Next, a modified example of the wave force adjustment mechanism 400 of this embodiment will be described using Figures 6A to 9B.

[0199] Figure 6A is a diagram illustrating a modified example of the wave force adjustment mechanism 400 of this embodiment, and is a front view of the structure 1 including the wave force adjustment mechanism 400, and a side view of the structure 1.

[0200] Furthermore, Figure 7A is a diagram illustrating a modified example of the wave force adjustment mechanism 400 of this embodiment, and is a side view of the structure 1 including the wave force adjustment mechanism 400 which is composed of two wall members having slits, and Figure 7B is a diagram illustrating a modified example of the wave force adjustment mechanism 400 of this embodiment, and is a side view of the structure 1 including the wave force adjustment mechanism 400 which is formed by three wall members having slits.

[0201] Figure 8 is a diagram illustrating a modified example of the wave force adjustment mechanism 400 of this embodiment, and is a perspective view and a side view of the structure 1 including the wave force adjustment mechanism 400 formed by a rectangular linear step-shaped member.

[0202] Furthermore, Figure 9A is a diagram illustrating a modified example of the wave force adjustment mechanism 400 of this embodiment, and is a perspective view of a structure 1 including the wave force adjustment mechanism 400 formed by a circular spiral-shaped staircase member, Figure 9B is a top view of the structure 1, and Figure 9C is a side view of the structure 1.

[0203] (Wave force adjustment mechanism based on a slit without an inclined shape) In this embodiment, the slit 410 of the wave force adjustment mechanism 400 is inclined, such as having an upward-facing slit shape, but as shown in Figures 6A and 6B, it may also be formed by a slit 410 that simply serves as an inlet.

[0204] In other words, the wave force adjustment mechanism 400 of this embodiment may have a plurality of slits 410, each with an inlet of a predetermined size, arranged parallel to each other in the vertical direction in a wall member 2 formed on the wave-facing surface of the structure 1.

[0205] In particular, in this case, the slit 410 is arranged as a wave force adjustment mechanism 400 on the wall member 2 of the structure 1, with the horizontal direction as the longitudinal direction and in a vertical direction.

[0206] With this configuration, the tower-type wave power generation system S1 of this embodiment can limit the lateral force generated by the waves and extract the vertical force generated by the waves, thereby enabling stable vertical movement of the floating body.

[0207] Furthermore, as shown in Figures 7A and 7B, the wave force adjustment mechanism 400 of this embodiment may consist of the wall member (hereinafter referred to as the "integrated wall member") 2 and one or more separate wall members (hereinafter referred to as the "separated wall members") 3 formed in parallel with the wall member 2 in the wave height direction and having a plurality of slits 420 similar to the integrated wall member 2.

[0208] In other words, the wave force adjustment mechanism 400 of this embodiment may be formed by an integrated wall member 2 having a plurality of slits (hereinafter referred to as "first slits") 410 formed thereon, along with one or more separate wall members 3 on the wave-facing surface of the structure 1, each having a plurality of slits 420 similar to the first slits 410.

[0209] In particular, in this case, in order to allow waves that have traveled toward the structure 1 to flow more appropriately to the underside of the floating body 10, each separating wall member 3 is formed with one or more second slits 420 which are at a different height in the vertical direction from the multiple first slits 410 formed in the integrated wall member 2, or one or more second slits 420 which are at a different height in the vertical direction from the second slits 420 formed in the adjacent separating wall member 3.

[0210] Specifically, the separate wall member 3 is formed at a predetermined distance from the integrated wall member 2 along the direction of wave propagation, and when the tower-type wave power generation system S1 is installed on the coast, it may be formed independently or it may be formed by joining a part of it to the structure 1.

[0211] Furthermore, the separate wall member 3, similar to the case where the wave force adjustment mechanism 400 is formed in the integrated wall member 2, has a plurality of second slits 420 arranged in parallel in the vertical direction on the wave-facing surface, ranging from a position above the wave height at high tide to a water depth of 4 m from the water surface at low tide.

[0212] On the other hand, each second slit 420, like the first slit 410, is formed in a rectangular shape with its longitudinal direction perpendicular to the alignment direction relative to the wave-facing surface, and functions as an inlet formed on the surface from which the waves arrive (i.e., the wave-facing surface) to allow the waves (water flow) to flow into the floating body 10 side of the structure 1.

[0213] Furthermore, as shown in Figures 7A and 7B, each second slit 420 is provided at a height where there are no second slits 420 formed in each first slit 410 or in other adjacent separate wall members 3.

[0214] In this case, each second slit 420 of the wave force adjustment mechanism 400 may have a predetermined depth in the direction of wave propagation and a predetermined inclination, similar to the first slit 410.

[0215] (Wave force adjustment mechanism based on a stepped member) The wave force adjustment mechanism 400 of this embodiment may be formed by a stepped member (hereinafter referred to as "stepped member") 4 50, as shown in Figure 8, which has a plurality of rectangular stepped surfaces with openings on the wave-facing surface of the structure 1, and in which the stepped surfaces gradually decrease in the direction away from the structure 1.

[0216] In other words, in this case, the wave force adjustment mechanism 400 is provided on the outside of the surface of the structure 1 where the slit 410 is formed, with a stair-shaped member 450 having a stair-like shape that extends in one direction and has a slit 410 at its lower part, and an opening (hereinafter referred to as "stair opening") 452 for allowing water to flow into the interior of the structure 1 is provided on the upper surface of each step 451 of the stair-shaped member 450.

[0217] In particular, instead of each slit 410 formed on the wave-facing surface of the structure 1 having an inclined shape, as shown in Figure 8, it is sufficient that an opening 453 for sending water flowing in from the stepped opening 452 towards the floating body 10 is formed at the bottom of the structure 1, regardless of its shape.

[0218] The stepped openings 452 are not particularly limited in size or number, but it is preferable that they have a shape that does not hinder the restriction of the vertical movement of the floating body 10 and does not significantly restrict the amount of water supplied to the floating body 10 (specifically, a shape that can supply enough water to allow the floating body 10 to move up and down appropriately).

[0219] On the other hand, each step 451 of the stair-shaped member 450 may be formed in a circular or elliptical shape instead of a rectangular shape, and instead of the step surface gradually decreasing in the direction away from the structure 1, each step 451 having a step opening 452 may be formed along the periphery (outskirt) of the structure 1, for example, as shown in Figures 9A, 9B, and 9C.

[0220] Furthermore, in this case, the effects of this embodiment can be further improved when wave planes are present in all directions.

[0221] [A2] Mechanism of power generation in a tower-type wave power generation system [A2.1] Fluid-centered power generation mechanism in a tower-type wave power generation system Next, with reference to Figure 1, the fluid-centered power generation mechanism in the tower-type wave power generation system S of this embodiment will be explained.

[0222] In this section, the explanation will use an example where the tower-type wave power generation system S is located in a coastal area and each slit 410 of the wave power adjustment mechanism 400 is configured with a downward-facing slit shape.

[0223] First, when there are no waves (specifically, when the incoming waves from offshore have not reached the surface on which the wave force adjustment mechanism 400 of the structure 1 is formed), the weight of the fluid F inside the introduction pipe 130 and the rising channel 140 of the floating body 10 is balanced by the buoyancy of the floating body 10, so the fluid F does not flow.

[0224] Then, in this state (hereinafter referred to as the "non-flow state"), when a pushing wave from offshore (a wave including longitudinal and transverse wave components) reaches the surface of the structure 1 where the wave force adjustment mechanism 400 is formed, some of the waves have their paths obstructed by the wall surface of the structure 1, while some of the waves flow into each slit 410.

[0225] Next, the waves flowing into each slit 410 travel downward along the slope of the slit 410 and enter the structure 1 with this directional property.

[0226] Then, the waves that enter the structure 1, with their transverse wave components canceled out, wrap around to the underside of the floating body 10, causing the floating body 10 to move upward.

[0227] On the other hand, after waves flow into each slit 410, when the incoming waves recede (i.e., when they become outgoing waves), waves stop flowing into many of the slits 410, and the water beneath the floating body 10 flows out from beneath the floating body 10 towards the open sea in conjunction with the outgoing waves.

[0228] At this time, the floating body 10 is moved downwards and maintains that position while waiting for the next incoming wave to reach the structure 1.

[0229] [A2.2] Power Generation Operation Next, the power generation operation in the tower-type wave power generation system S of this embodiment will be described with reference to Figure 1.

[0230] First, as described above, when the lower surface of the floating body 10 is subjected to wave force, based on Pascal's principle, the fluid F in the introduction pipe 130 is compressed by the storage section 120 and sent from the introduction pipe 130 to a predetermined height via the rising channel 140 and flows into the upper pool 210.

[0231] Next, when the fluid F flows into the upper pool 210, it is sent downward through the descending channel 220, driving the dynamo of the power generation unit 300 housed in the housing section 230 of the descending channel 220, and then flows into the lower pool 240.

[0232] The power generation unit 300 generates electricity by driving a dynamo with the potential energy of the fluid F sent to the descending channel 220.

[0233] Next, the fluid F that flows into the lower pool 240 is returned to the storage section 120 via the return channel 250.

[0234] [A3] Modified Examples Next, modified examples of the tower-type wave power generation system S1 of this embodiment will be described using Figures 10A to 16B.

[0235] Figure 10A is a perspective view of a modified example of the tower-type wave power generation system S1 of this embodiment, and Figure 10B is a diagram illustrating the slit shape of the modified example of the tower-type wave power generation system S1 of this embodiment.

[0236] Furthermore, Figure 11A is a top view illustrating the shape (1) of a modified floating body 500 in the tower-structured wave power generation system S1 of this embodiment, and Figure 11B is a top view illustrating the shape (2) of a modified floating body 500 in the tower-structured wave power generation system S1 of this embodiment.

[0237] Figure 12 is a diagram illustrating the change in state associated with the vertical movement of the push-up mechanism 110 of the modified bonding membrane 121 in the tower-type wave power generation system S1 of this embodiment, and Figure 13 is a diagram illustrating the structure of the modified push-up mechanism 110 and storage section 120 in the tower-type wave power generation system S1 of this embodiment.

[0238] Furthermore, Figure 14 shows a modified example of the tower-type wave power generation system S1 of this embodiment, in which the storage section 120 is formed by a bonding membrane 121, and Figure 15 shows a modified example of the tower-type wave power generation system S1 of this embodiment, in which the return channel 250 is connected below the storage section 120.

[0239] Furthermore, Figures 16A and 16B are modified examples of the tower-type wave power generation system S1 of this embodiment, and are side views of other examples of the floating body 10 (cylindrical type), and are modified examples of the tower-type wave power generation system S1 of this embodiment, and are side views of other examples of the floating body 10 (mortar-shaped).

[0240] (Floating Wave Power Generation System) The tower-type wave power generation system S1 of this embodiment is fixedly installed on a structure such as a breakwater. However, when installing in sea areas where there are no buildings that can be fixedly installed or where it is not possible to lay a foundation, such as sea areas far from the coast, deep sea areas, sea areas with coral reefs, or sea areas with soft seabeds, a floating section 500 may be provided around the structure 1, and the tower-type wave power generation system itself may be configured as a floating type.

[0241] For example, in this case, the tower-type wave power generation system S1 is provided with a floating body 500 on the surface around the structure 1 where the wave power adjustment mechanism 400 is not formed (hereinafter referred to as the "wave power adjustment mechanism non-formed surface"), as shown in Figures 10A and 10B.

[0242] The floating body portion 500 may be formed on all surfaces not formed by the wave force adjustment mechanism portion, or, as shown in Figure 10A, it may be formed on the left and right surfaces not formed by the wave force adjustment mechanism portion.

[0243] Specifically, the floating body 500 is not limited in size or shape as long as it can float the tower-type wave power generation system S1. For example, as shown in Figure 10A, it is formed in a rectangular shape with a predetermined thickness on the surface adjacent to the surface where the wave power adjustment mechanism is not formed, centered on the structure 1. However, the floating body 500 basically has a rectangular shape on the wave-facing side as shown in Figure 11A, but as shown in Figure 11B, it may have a wave-collecting structure to facilitate wave propagation on the surface where the wave power adjustment mechanism 400 is formed.

[0244] Furthermore, it is preferable that the floating portion 500 has a larger size than the floating body 10 and is formed in a shape that is longer in the longitudinal direction than half the wavelength of the surrounding waves.

[0245] The floating section 500 is made of metal (iron, stainless steel, aluminum, etc.), resin (polycarbonate), FRP (fiber-reinforced plastic), composite material such as carbon fiber, metal, and resin (carbon fiber (carbon fiber reinforced plastic)) plate, or CFRP (recycled carbon fiber + thermosetting resin).

[0246] Furthermore, in this case, the slits 410 of the wave force adjustment mechanism 400 are preferably of the downward type, and in particular, the slits 410 arranged near the water surface are preferably formed with an inner opening 412 below the lower surface of the floating body 10, as shown in Figure 10B.

[0247] Furthermore, if the tower-type wave power generation system S1 itself is configured as a floating type by the floating section 500 as described above, it is preferable to drop an anchor (not shown) to the seabed in order to keep it in a certain area on the water.

[0248] (Inverted tapered push-up mechanism) The push-up mechanism 110 of this embodiment is formed in a cylindrical shape with a tapered shape that narrows upwards, but it may also be formed in a hollow cylindrical shape with a tapered shape that narrows downwards (inverted tapered shape that widens upwards).

[0249] In this case, as shown in Figure 12, the push-up mechanism 110 has a bottom surface 112 that is the same size as or larger than the storage section 120, and the side surface 113 is formed diagonally upward from the bottom surface 112, forming a cylindrical shape with an inverted tapered shape (the cross section is inverted V-shape).

[0250] Furthermore, as shown in Figure 12, the bonding membrane 121 of the storage section 120 is provided to seal the gap formed between the push-up mechanism section 110 and the storage section 120.

[0251] In other words, the bonding membrane 121 is provided, similar to this embodiment, to prevent the fluid F stored in the storage portion 120 from leaking out of the gap even if the gap formed between the lifting mechanism 110 and the storage portion 120 deforms due to the relative positional change between the lower end of the storage portion 120 and the upper surface of the lifting mechanism 110 caused by the vertical movement of the lifting mechanism 110.

[0252] Furthermore, as shown in Figure 12, the bonding membrane 121 has a structure that, when the push-up mechanism 110 moves up and down, swells outwards from the storage portion 120 due to the excess fluid F while maintaining the bond between the push-up mechanism 110 and the storage portion 120.

[0253] (When fluid is also stored in the push-up mechanism) In this embodiment, the push-up mechanism 110 pushes the fluid F in the storage section 120 upward, but as shown in Figure 13, the push-up mechanism 110 may also be pushed up with the inside of the push-up mechanism 110 also filled with fluid F.

[0254] (When the storage portion is formed by a bonding membrane) In this embodiment, fluid F is stored in the storage portion 120, and the area around the upper surface 111 of the push-up mechanism portion 110 is joined to the lower end of the storage portion 120. However, as shown in Figure 14, the storage portion 120 may also be formed by a bonding membrane 121.

[0255] In other words, in this case, the lower end of the introduction pipe 130 and the area around the upper surface 111 of the push-up mechanism 110 are joined by the bonding film 121.

[0256] (Connection between the return channel and the lower part of the storage section) In this embodiment, the other end of the return channel 250 on the downstream side is connected to the middle section of the inlet pipe 130, but as shown in Figure 15, it may also be connected to the lower part (rear section) of the storage section 120.

[0257] In other words, in this case, the return channel 250 is configured to return the fluid F to the storage section 120 by preventing, or making it difficult to prevent, the flow of fluid F sent from the lower pool 240 from mixing with the flow of fluid F sent from the lower pool 240 when the fluid F in the storage section 120 is sent to the rising channel 140 via the introduction pipe 130 by the push-up mechanism 110.

[0258] (Other shapes of floating bodies) The floating body 10 of this embodiment has a stepped shape with a portion indented downwards in the central part of the bottom surface. However, as shown in Figure 16A, it may also have a rectangular shape (cylindrical) with a uniform rectangular bottom surface and an open top, or as shown in Figure 16B, it may have a mortar-shaped (mortar-shaped) form with a portion indented downwards in the central part of the bottom surface and an opening area that widens towards the top.

[0259] In particular, in the case of a cylindrical shape, it can be manufactured more cheaply and simply than the floating body 10 of the above embodiment.

[0260] Furthermore, in the case of a mortar-shaped structure, compared to the floating body 10 of the above embodiment and the cylindrical shape, the area of ​​the bottom surface receiving wave force when rising due to the wave force received on the bottom surface is larger, and the volume affected by buoyancy is also larger, so a larger buoyancy can be obtained as it rises.

[0261] Therefore, when the bowl-shaped floating body 10 receives wave force on its bottom surface and rises, it moves upward at an accelerating rate, and the energy obtained by this movement can be transmitted to the push-up mechanism 110.

[0262] As a result, the push-up mechanism 110 also rises at an accelerating rate in accordance with the movement of the floating body 10, so that a large amount of fluid F can be sent from the storage section 120 to the power generation channel section 200 via the rising channel 140 in a short time, thereby increasing the power generation efficiency.

[0263] In this embodiment, the floating body 10 has a staircase shape with two steps, but it may also have many steps, like a mortar shape, and a higher effect can be obtained, similar to that of a mortar shape.

[0264] Furthermore, even if the structure is cylindrical or bowl-shaped, wheels (trolleys) 14 that roll along each wall surface 7 to facilitate the vertical movement of the floating body 10 may be provided on each wall surface 13, and, as in this embodiment, there are no restrictions on the number or position of the wheels 14.

[0265] (Regarding the first and second valves) In the embodiments described above, the tower-type wave power generation system S is provided with a first valve 150 and a second valve 260. However, it is not limited to this, and for example, at least one of the first valve 150 or the second valve 260 may be omitted.

[0266] (Regarding the power generation unit) In the above embodiments, the power generation unit 300 has been described as being provided only in the downward flow path 220 of the power generation flow path 200. However, it is not limited to this, and may be provided, for example, in the return flow path 250 of the power generation flow path 200, or in the upward flow path 140 of the pump-up mechanism 100.

[0267] [B] Second Embodiment [B1] Overview of this Embodiment Next, the overview of the second embodiment of the tower-type wave power generation system S2 according to the present invention will be described.

[0268] The tower-structured wave power generation system S2 of this embodiment is characterized in that, unlike the tower-structured wave power generation system S1 of the first embodiment, which has a single transport means and its surrounding structure for transporting fluid F to a predetermined height using wave power, this system has multiple transport means and corresponding surrounding structures.

[0269] In other words, the tower-type wave power generation system S2 of this embodiment is characterized by having multiple means for transporting the fluid F to a predetermined height, and by having a common means for converting the potential energy of the fluid F transported to the predetermined position into electricity.

[0270] In particular, the tower-type wave power generation system S2 of this embodiment is capable of more efficiently transporting the fluid F to a predetermined height using wave power, and has a configuration that can further reduce electricity costs and running costs.

[0271] In this embodiment, all other aspects are the same as in the first embodiment, and the same reference numerals are used for the same components, and their descriptions are omitted.

[0272] [B2] Tower-type wave power generation system Next, the configuration of the tower-type wave power generation system S2 of this embodiment will be described using Figure 17.

[0273] Figure 17 is a schematic diagram of the tower-type wave power generation system S2 of this embodiment.

[0274] As shown in Figure 17, the tower-type wave power generation system S2 of this embodiment includes a pump-up mechanism 100 which serves as a means for transporting the fluid F to a predetermined height in accordance with the positional changes of each of the multiple floating bodies 10.

[0275] As shown in Figure 17, the tower-type wave power generation system S2 includes a single power generation channel section 200 that collects the fluid F transported by multiple pump-up mechanisms 100 and sends it downward, and a single power generation unit 300 that generates electricity using the potential energy of the fluid F sent out by the power generation channel section 200.

[0276] With this configuration, the tower-type wave power generation system S2 of this embodiment can pump up and collect more fluid F to a predetermined height compared to the case where a single pump-up mechanism 100 is used, thus enabling more efficient power generation.

[0277] [B3] Power Generation Flow Channel Next, the power generation flow channel 200 of this embodiment will be described.

[0278] As shown in Figure 17, the power generation flow channel section 200 includes a single upper pool 210, a descending flow channel 220, a housing section 230, a lower pool 240, a plurality of return flow channels 250, and a second valve 260.

[0279] In particular, the power generation flow channel section 200 of this embodiment is equipped with a single upper pool 210, a descending flow channel 220, a storage section 230, and a lower pool 240, in order to generate power using a single power generation section 300. In addition, each storage section 120 is equipped with a return flow channel 250 and a second valve 260 to return the fluid F to each pump-up mechanism section 100.

[0280] (Upper Pool) The upper pool 210 is a means for temporarily storing the fluid F transported by each pump-up mechanism 100 in one place, and, as in the first embodiment, is formed, for example, as a box-shaped body (or a hollow cylindrical body, etc.) with an open top.

[0281] Furthermore, as shown in Figure 17, unlike the first embodiment, the upper pool 210 is provided with a slope 216 having a predetermined length and a predetermined incline, extending directly below the upper end 142 of each pump-up mechanism 100.

[0282] In particular, the slope 216 is provided to slow down the momentum of the fluid F discharged from the upper end 142 and to suppress foaming of the fluid F, which would reduce the power generation efficiency.

[0283] (Descending passage) The descending passage 220 is located below the upper pool 210, similar to the first embodiment and as shown in Figure 17. It is a passage that sends the fluid F sent from each pump-up mechanism 100 downwards through the upper pool 210 to drive the power generation unit 300, and then sends it to a single lower pool 240.

[0284] (Housing section) The housing section 230 is provided on the flow path of the descending flow path 220, similar to the first embodiment and as shown in Figure 17, and has a hollow shape with the side facing the descending flow path 220 open, and has a shape and size that allows it to house the power generation section 300.

[0285] (Lower Pool) The lower pool 240 is a storage means for temporarily storing the fluid F sent from the descending channel 220, and is formed, for example, as a box-shaped body (or a hollow cylindrical body, etc.) with an open top, similar to the upper pool 210.

[0286] Furthermore, as shown in Figure 17, the lower pool 240 is located directly below the downstream end of the descending channel 220 and is positioned at a predetermined distance from the descending channel 220.

[0287] Furthermore, a third connection port 241 is provided at the lower end of the lower pool 240 for connecting the return channel 250 to the lower pool 240.

[0288] Furthermore, as shown in Figure 17, the lower pool 240 is provided with a slope 246 having a predetermined length and a predetermined incline, similar to the upper pool 210, extending directly below the open end of the descending channel 220.

[0289] (Return channel) The return channel 250 is a channel that returns the fluid F sent from the lower pool 240 to each storage section 120, and has a pipe shape (for example, a circular pipe shape) which has an L-shape and each of its ends is an open end.

[0290] (Second valve) The second valve 260 is a valve that restricts the backflow of fluid F from the storage section 120 to the return passage 250, and is constructed using a known valve body. As shown in Figure 1, it is located at the downstream end of the return passage 250 and is fixed to the return passage 250 by a fastener or the like.

[0291] Furthermore, the second valve 260 prevents the fluid F from flowing from the storage section 120 into the return passage 250.

[0292] [B4] Modification Next, a modification 1 of the tower-type wave power generation system S2 of this embodiment will be described using Figure 18.

[0293] Figure 18 is a diagram illustrating a modified example 1 of the tower-type wave power generation system S2 of this embodiment.

[0294] The tower-type wave power generation system S2 of this embodiment uses floating bodies 10 associated with each pump-up mechanism 100, but a single floating body 10 may be used, or one floating body 10 may be used for each of the multiple pump-up mechanisms 100.

[0295] For example, the tower-type wave power generation system S2 may have a configuration in which the push-up mechanism 110 of each pump-up mechanism 100 is provided on a different floating body 10, or one floating body 10 may be assigned to every two or more pump-up mechanisms 100, and the push-up mechanism 110 of each pump-up mechanism 100 may be provided on the corresponding floating body 10.

[0296] In other words, in this case, each pump-up mechanism 100 has a configuration including a floating body 10, as shown in Figure 1.

[0297] Furthermore, for example, the tower-type wave power generation system S2 may have a configuration in which the push-up mechanism 110 of each pump-up mechanism 100 is provided on a single floating body 10.

[0298] In this case, the tower-type wave power generation system S2 may include, as shown in Figure 18, a first pump-up mechanism 100A that sends the fluid F in the storage section 120 to the power generation channel section 200 (specifically, the upper pool 210) via the rising channel 140 when the floating body 10 moves upward, and a second pump-up mechanism 100B that sends the fluid F in the storage section 120 to the power generation channel section 200 (specifically, the upper pool 210) via the rising channel 140 when the floating body 10 moves downward.

[0299] In particular, the second pump-up mechanism 100B sends the fluid F in the storage section 120 to the power generation channel section 200 via the upward channel 140 when the floating body 10 moves downward.

[0300] Furthermore, in the second pump-up mechanism 100B, since the weight of the floating body 10 is used, it is preferable that the amount of fluid F pumped up is half the amount of fluid F pumped up by the first pump-up mechanism 100A.

[0301] In other words, in this case, the second pump-up mechanism 100B is formed by a push-up mechanism 110B and a storage section 120B that are smaller in size than the push-up mechanism 110A and storage section 120A of the first pump-up mechanism 100A.

[0302] In this case, each of the push-up mechanisms 110 of the second pump-up mechanism 100B is provided with a connecting member 11 for connecting to the floating body 10.

[0303] Furthermore, in Figure 18, the components other than the pump-up mechanism 100 are omitted because they have the same configuration as in this embodiment.

[0304] As described above, in the tower-type wave power generation system S2 having the first pump-up mechanism 100A and the second pump-up mechanism 100B, the fluid F can be pushed up to a predetermined height more efficiently, thus enabling more efficient power generation.

[0305] Furthermore, the tower-type wave power generation system S2 of this embodiment can also be modified to include a modification of the first embodiment.

[0306] [C] Other Embodiments Next, other embodiments of each of the above embodiments will be described with reference to Figures 19A to 35B.

[0307] Figures 19A to 20B are diagrams illustrating another embodiment 1 of the wave force adjustment mechanism 400 in each of the above embodiments.

[0308] Furthermore, Figures 21A to 23 are diagrams illustrating the structure of the floating body 10 in another embodiment 2 of each of the above embodiments.

[0309] Figures 24A, 24B, and 24C are diagrams illustrating the wheel 14 in another embodiment 2 of each of the above embodiments.

[0310] Furthermore, Figures 25A and 25B illustrate the structure in which the wheels 14 and arm portion 15 are formed on only one side of the floating body 10 in another embodiment 2 of each of the above embodiments, and Figure 26 shows an example of the shape of the bottom surface of the floating body 10 in another embodiment 2 of each of the above embodiments.

[0311] In addition to the above, Figures 27A and 27B are diagrams illustrating the slider 17 in another embodiment 3 of each of the above embodiments, and Figure 28 is a diagram showing an example of a stopper 9 that restricts the vertical movement of the floating body 10 in another embodiment 3 of each of the above embodiments.

[0312] Furthermore, Figures 29A, 29B, and 29C show examples of wave force adjustment mechanisms 400 formed in the structure 1 in another embodiment 5 of the above embodiments, in which a plurality of slits 410 having different inclination angles are arranged, and Figure 30 shows an example in which the wave force adjustment mechanism 400 of Figure 29 is formed by a laminated swash plate structure.

[0313] Figures 31A and 31B show examples of wave force adjustment mechanisms 400 formed on two adjacent sides (wall surfaces 7) of the structure 1 in another embodiment 5 of the above embodiments, and Figures 32A and 32B are diagrams for explaining the relationship between the rail section 8 and slider 17 and the floating body 10 in Figure 31.

[0314] Furthermore, Figure 33 shows an example of a first slit forming section 460A and a second slit forming section 460B having a laminated slanted plate structure in a structure 1 having a triangular prism structure in which the top surface 5 is formed from a triangle in another embodiment 5 of the above embodiments, and Figures 34A, 34B and 34C show examples of a slit 410 having a V shape, a slit 410 having an inverted V shape, or a slit 410 formed from two or more channels with different inclinations in another embodiment 6 of the above embodiments.

[0315] Figures 35A and 35B show examples of structures 1 in other embodiments 7 of the above embodiments, where the top surface 5 is formed by rectangular columns or triangular columns using port facilities such as breakwaters.

[0316] (Other Embodiment 1) The wave force adjustment mechanism 400 in each of the above embodiments is integrally formed with the wall member 2 formed on the wave-facing surface of the structure 1. However, at least one of the outer surface (i.e., the surface on which the outer opening 411 is formed) and the inner surface (i.e., the surface on which the inner opening 412 is formed) may be movable, and the structure may have a change in the distance between the outer surface and the inner surface, the vertical position (height direction), or both.

[0317] In particular, the wave force adjustment mechanism 400 of this modified example may be composed of a laminated swash plate structure (blind structure) as shown in Figures 19A to 20B, a first surface 421 having an outer opening 411, a second surface 422 provided opposite the first surface 421 and having an inner opening 412, and a change control unit 430 that changes the positional relationship between the first surface 421 and the second surface 422 to control the inflow of water into the slit 410.

[0318] In this case, as shown in Figures 19A to 20B, the wave force adjustment mechanism 400 of this modified example is formed as a laminated slanted plate structure (blind structure) by a plurality of plate-like members (members that function as slats) 415 that are laminated with predetermined gaps in between, while having an inclination in the height direction in which the water surface height changes (the direction in which the floating body 10 moves up and down).

[0319] The change control unit 430 has a configuration that controls the inclination angle of each plate-shaped member 415 as a slat by changing the positional relationship between the first surface 421 and the second surface 422, thereby controlling the inflow of water into the slit 410.

[0320] In other words, the wave force adjustment mechanism 400 of this modified example has a configuration that, when the height position of the outer opening 411 formed on the first surface 421 and the inner opening 412 formed on the second surface 422 is moved in a direction that separates them, the inclination of each slit 410 increases, which makes it possible to suppress the amount of water flowing into the structure 1 or to slow down the inflow velocity of the water.

[0321] Furthermore, the wave power adjustment mechanism 400 of this modified example has such a configuration that, when it is desired to suppress the output of power generation, such as during maintenance, it is possible to reduce or stop the vertical movement of the floating body 10 and suppress (including stopping) the operation of the power that generates power.

[0322] Specifically, the wave force adjustment mechanism 400 of this modified example has a plurality of slits 410 arranged in parallel in the vertical direction and inclined from the outer opening 411 toward the inner opening 412, similar to the embodiment described above. Each slit 410 has an elongated hole shape with a given inclination and a given length along the wave direction.

[0323] Each slit 410 is configured such that its inclination angle is changed in accordance with any change in the vertical positional relationship between the first surface 421 and the second surface 422.

[0324] In other words, as shown in Figures 19A to 20B, each slit 410 has a structure in which the inclination changes when the first surface 421 or the second surface 422 moves in the vertical direction, and has a configuration that makes it possible to suppress the amount of water flowing into the structure 1 or to slow down the inflow velocity of the water as the inclination changes.

[0325] Furthermore, each slit 410 is configured to block the inflow of water into the structure 1 when the outer opening 411 rises above the water surface, or when the difference between the height position of the outer opening 411 and the height position of the inner opening 412 becomes greater than the amount of fluctuation in the height of the water surface.

[0326] The change control unit 430 has a structure for moving at least one of the first surface 421 and the second surface 422 in the vertical direction.

[0327] In particular, the change control unit 430 of this modified example has a structure that moves the entire second surface 422, including the inner opening 412, toward the top surface direction of the structure 1 (the height direction perpendicular to the wave direction) or toward both the top surface direction and the water surface direction, by winding up a string-like member suspended from the top of the structure 1.

[0328] On the other hand, the change control unit 430 in this modified example may have a configuration that changes the distance between the first surface 421 and the second surface 422, instead of or in addition to the above.

[0329] In this case, each slit 410 may be formed to be stretchable, and has a structure that stretches in accordance with the change in the distance between the first surface 421 and the second surface 422. For example, in this case, each slit 410 is made of rubber or the like.

[0330] Figures 19A, 19B, and 19C are simply diagrams illustrating the state in which each slit 410, where the inner opening 412 is lower than the outer opening 411, is gradually moved by the change control unit 430 so that the entire second surface 422 moves toward the top surface of the structure 1.

[0331] Furthermore, Figure 20A shows an example of each slit 410 in a state where the inner opening 412 is lower than the outer opening 411, thereby blocking the inflow of water into the structure 1, while Figure 20B shows an example of each slit 410 in a state where the inner opening 412 is higher than the outer opening 411, thereby blocking the inflow of water into the structure 1.

[0332] (Another embodiment 2) In the floating body 10 of the above embodiment, wheels 14 that roll on two or more wall surfaces 7 constituting the structure 1 are provided on the wall surface 13, but the wheels 14 may be provided at a position higher than the water surface.

[0333] In other words, the floating body 10 of this modified example has a configuration that eliminates causes of failure due to water pressure or water-related issues such as rust and corrosion, by not having sliding means such as wheels formed in the water.

[0334] For example, in this case, as shown in Figures 21A to 23, the floating body 10 is provided with an arm portion 15 that extends from the wall surface 13 above the floating body 10, and wheels 14 may be provided at the tip of the arm portion 15, at a position higher than the floating body 10, or both.

[0335] Figures 21A to 23 are diagrams illustrating the structure of the floating body 10, each with a different structure of the arm section 15 and the corresponding arrangement of the wheels 25.

[0336] In particular, Figures 21A to 23 show an example in which a top plate surface is formed as part of the wall surface 13 in a position that does not obstruct insertion into the introduction pipe 130 in the push-up mechanism 110, and an arm is joined to this top plate surface.

[0337] Furthermore, as shown in Figures 24A, 24B, and 24C, the wheel 14 in this embodiment may have a disc shape that rolls around an axle 16 connected to the arm portion 15 and along a rail portion 8 formed on the wall surface 7 of the structure 1, or it may have a polygonal shape such as a square or octagon.

[0338] On the other hand, in this embodiment, as shown in Figures 25A and 25B, the wheels 14 may be provided on only one side wall surface 7 of the structure 1 at a position higher than the water surface.

[0339] Furthermore, the floating body 10 in Figures 25A and 25B has a structure in which only one wheel 14 and arm portion 15 are formed on one side, as shown in Figure 21A or Figure 21B. However, the floating body 10 in Figures 22A to 23 may also have a structure in which only one wheel 14 and arm portion 15 are formed on one side, although these are not shown.

[0340] For example, in this case, the wheel 14 and the arm portion 15 are formed on the wall surface 13 side opposite to the wave-facing side.

[0341] In this case, as shown in Figure 26, the lower structure of the floating body 10 that is in contact with the water surface may have different shapes on the wave-facing side and on the side where the wheels 14 and arm portion 15 are formed.

[0342] For example, the bottom surface of the floating body 10 on the wave-facing side, which is in contact with the water surface, should preferably be formed with a structure that is easily affected by longitudinal wave components, such as a bilge shape formed by the curved surface of the ship's bottom, as shown in Figure 26.

[0343] Furthermore, by having this configuration, the floating body 10 can improve its stability during vertical movement.

[0344] (Other Embodiment 3) In the floating body 10 of the above embodiment, wheels 14 that roll on each wall surface 7 constituting the structure 1 are provided on the wall surface 13, but these wheels 14 may be replaced by a sliding mechanism.

[0345] In other words, the floating body 10 only needs to have a structure that allows it to move up and down smoothly and stably.

[0346] For example, in this case, as shown in Figures 27A and 27B, assuming that an H-shaped rail section 8 having an opening facing inward is formed on two or more wall surfaces 7 constituting the structure 1, a plurality of U-shaped sliders 17 are provided on the wall surface 13 of the floating body 10, which are slidably fitted into the rail section 8.

[0347] Furthermore, the slider 17 is not limited to its shape as long as it has a shape that allows it to slide vertically into the rail portion 8 formed on the wall surface 7.

[0348] Furthermore, Figure 27A shows an example (perspective view and top view) of a slider 17 (including the arm portion 15) having a structure that covers the rail portion 8 on the floating body 10 side, and Figure 27B shows an example (perspective view and top view) of a slider 17 (including the arm portion 15) having a structure that covers a part of the rail portion 8 on the floating body 10 side.

[0349] (Other Embodiment 4) As shown in Figure 28, the structure 1 of the above embodiment may have a stopper 9 fixed to the structure 1 in order to restrict the vertical movement of the floating body 10.

[0350] (Other Embodiment 5) In each of the above embodiments, the wave force adjustment mechanism 400 is provided with a plurality of slits 410 arranged at a predetermined inclination angle along the direction in which the water surface height changes, but a plurality of slits 410 having different inclination angles may also be provided.

[0351] In other words, the plurality of slits 410 in this modified example may include one or more first slits 410A formed by an inner opening 412A having a first inclination angle that is higher in the height direction than the outer opening 411B, and one or more second slits 410B formed by a second inclination angle that is different from the first inclination angle, and where the outer opening 411B is higher in the height direction than the inner opening 411A.

[0352] Furthermore, the multiple slits 410 in this modified example have such a configuration that they can suppress transverse waves for all types of waves, such as wind waves (triangular waves), swells (rounded waves), irregular waves, breaking waves or shore waves that change as the water depth decreases, while also generating appropriate wave force on the lower surface of the floating body 10.

[0353] Specifically, as shown in Figures 29A, 29B, and 29C, the wave force adjustment mechanism 400 has a first slit forming section 460A with a plurality of first slits 410A arranged in the height direction, and a second slit forming section 460B with a plurality of second slits 410B arranged in the height direction, both arranged side by side along the water surface.

[0354] In this case, it is preferable that the first inclination angle of each first slit 410A of the first slit forming section 460A and the second inclination angle of each second slit 410B of the second slit forming section 460B are symmetrical with respect to the center of the wave force adjustment mechanism section 400 that extends vertically along the height direction. However, this is not the case if the outer opening 411 of one slit forming section 460 is higher than the inner opening 412 of the same slit forming section (for example, a downward-facing slit shape), and the inner opening 412 of the other slit forming section 460 is higher than the outer opening 411 of the same slit forming section (for example, an upward-facing slit shape).

[0355] In this case, a beam 470 is provided between the first slit forming section 460A and the second slit forming section 460B in order to maintain the strength of the wave force adjustment mechanism section 400.

[0356] Figure 29A is a perspective view of the structure 1 including the wave force adjustment mechanism 400 of this modified example, Figure 29B is a left side view of the structure 1 including the wave force adjustment mechanism 400 of this modified example, and Figure 29C is a right side view of the structure 1 including the wave force adjustment mechanism 400 of this modified example.

[0357] Furthermore, the first slit-forming portion 460A and the second slit-forming portion 460B may be formed by the laminated swash plate structure described above, as shown in Figure 30.

[0358] On the other hand, if the wave force adjustment mechanism 400 is formed on two adjacent sides (wall surfaces 7) of the structure 1, a first slit-shaped portion 450A may be provided on the first side surface and a second slit-shaped portion 450B on the second side surface, as shown in Figures 31A and 31B.

[0359] Figure 31A shows an example of a cylindrical structure 1 having a rectangular column structure with a top surface 5 formed from a rectangle, which is capable of autonomously operating on the ocean, while Figure 31B shows an example of a structure 1 having a triangular column structure with a top surface 5 formed from a triangle, which utilizes port facilities such as breakwaters.

[0360] In particular, if the structure 1 is a rectangular column structure, as shown in Figure 32A, a rail section 8 can be provided on another side (wall surface 7) of the structure 1 where the wave force adjustment mechanism section 400 is not formed, and a slider 17 can be formed on the floating body 10 along the rail section 8.

[0361] Furthermore, if the structure 1 is a triangular prism structure, as shown in Figure 32B, rail sections 8 can be provided on the surface of port facilities such as breakwaters, and sliders 17 can be formed on the floating body 10 along the rail sections 8.

[0362] Furthermore, in the wave force adjustment mechanism 400 of this modified example, as shown in Figure 33, it may be formed by a first slit forming section 460A and a second slit forming section 460B having the laminated swash plate structure described above. However, Figure 33 is an example of a structure 1 having a triangular prism structure in which the top surface 5 is formed from a triangle.

[0363] (Other Embodiment 6) In each of the above embodiments, the wave force adjustment mechanism 400 is provided with a plurality of slits 410 having a predetermined inclination angle along the direction in which the height of the water surface where waves are generated changes. However, each slit 410 may be formed from at least two or more flow channels having different inclination angles.

[0364] For example, as shown in Figures 34A and 34B, each slit 410 has a V-shape or an inverted V-shape when the structure 1 is viewed from the side, and is configured to suppress transverse waves for all types of waves, such as wind waves (triangular waves), swells (rounded waves), irregular waves, breaking waves or shore waves that change as the water depth decreases, while also generating appropriate wave force on the lower surface of the floating body 10.

[0365] Furthermore, in each slit 410, the inclination angle of one of the two or more flow paths may be smaller than or zero than the inclination angles of the others.

[0366] For example, as shown in Figure 34C, when the structure 1 is viewed from the side, the flow path 428 on the outer opening 411 side of each slit 410 has a shape parallel to the water surface, and the flow path 429 joined to the flow path 428 of each slit 410 and inclined toward the inner opening 412 side may have a downward-facing or upward-facing slit shape.

[0367] (Other Embodiments 7) As shown in Figures 35A and 35B, the structure 1 of each of the above embodiments may be formed by utilizing port facilities such as breakwaters, with the top surface 5 being a rectangular column or a triangular prism.

[0368] [D] In addition to the above issues, this application also includes wave power generation systems that solve problems such as efficient wave power generation, highly safe wave power generation, or low-cost manufacturing.

[0369] Furthermore, the present invention also provides a wave power generation system in which the wave power adjustment mechanism 400 is omitted, and includes, for example, a wave power generation system in which each of the following has its own unique constituent requirements and unique effects: the structure of the floating body 10, the tower structure and central pillar suspension structure of the structure 1, the structure of the structure 1 based on the floating body 500, the shape of the push-up mechanism 110, the combined structure of the push-up mechanism 110, the storage section 120 and the introduction pipe 130, the shape of the joining membrane 121, and the slope shape of each flow path.

[0370] Furthermore, the present invention is not limited to the embodiments described above, and various modifications are possible. For example, terms cited as broad or synonymous terms in the specification or drawings may be replaced with broad or synonymous terms in other descriptions in the specification or drawings.

[0371] The present invention includes configurations that are substantially identical to those described in the embodiments (for example, configurations with the same function, method, and result, or configurations with the same purpose and effect). The present invention also includes configurations in which non-essential parts of the configurations described in the embodiments are replaced. Furthermore, the present invention includes configurations that produce the same effects or achieve the same purpose as those described in the embodiments. Finally, the present invention includes configurations that add known technology to the configurations described in the embodiments.

[0372] As described above, embodiments of the present invention have been explained in detail, but it will be readily apparent to those skilled in the art that many modifications are possible without substantially departing from the novel aspects and effects of the present invention. Therefore, all such modifications are included within the scope of the present invention.

[0373] F: Fluid S: Structural wave power generation system 1: Structure 2: Wall member (integrated wall member) 3: Separable wall member 5: Top surface 7: Wall surface 8: Rail section 10: Floating body 11: Connecting member 12: Recess 13: Wall surface 14: Wheel 15: Arm section 17: Slider 51: Second connection port 100: Pump-up mechanism section 110: Push-up mechanism section 120: Storage section 121: Joining membrane 130: Inlet pipe 140: Upward flow path 150: First valve 200: Power generation flow path section 210: Upper pool 211: First connection port 215: Upper pool 216: Slope 220: Downward flow path 221: Second connection port 230 : Housing section 240 : Lower pool 241 : Third connection port 245 : Lower pool 246 : Slope 250 : Return channel 260 : Second valve 300 : Power generation section 400 : Wave force adjustment mechanism section 410, 420 : Slit 428 : Channel 411 : Outer opening 412 : Inner opening 450 : Staircase-shaped member 451 : Step 452 : Step opening 453 : Opening 460 : Slit forming section 470 : Beam 500 : Floating section

Claims

1. A wave power generation system that converts the potential energy of a fluid carried to a predetermined height by wave force into electricity via a power generation means, comprising: a floating body that floats on the water surface and whose vertical position changes due to the wave force; a limiting means that limits the lateral swaying of the floating body caused by the wave force; a transport means that transports the fluid to the predetermined height in accordance with the position change of the floating body; a discharge means that discharges the fluid transported by the transport means downward; and a power generation means that generates electricity using the potential energy of the fluid discharged by the discharge means.

2. A wave power generation system according to claim 1, wherein the limiting means comprises: a structure disposed near the side surface of the floating body and formed along the same direction as the direction in which the floating body moves up and down, and formed perpendicular to waves arriving from the side; and one or more inlets formed on the surface of the structure from which the waves arrive, for allowing water to flow into the floating body side of the structure.

3. A wave power generation system according to claim 2, wherein a plurality of inlets are formed in the structure, and the plurality of inlets are arranged along the direction in which the height of the water surface where waves are generated changes.

4. A wave power generation system according to claim 2 or 3, wherein the inlet has an outer opening that opens on the outer surface of the structure and an inner opening that opens on the inner surface of the structure and is located at a different position from the outer opening in the vertical direction in which the position of the floating body changes, and at least a part of the inlet is arranged to be inclined from the outer opening toward the inner opening.

5. A wave power generation system according to claim 2 or 3, wherein one or more wall members are further provided on the outside of the surface of the structure where the inlet is formed to exclude the lateral oscillation component of the wave force, and each wall member is formed with one or more second inlets which are formed at a different height in the vertical direction from the plurality of first inlets formed on the surface of the structure or other adjacent wall members.

6. A wave power generation system according to claim 2 or 3, wherein a staircase member having a staircase shape is provided on the outside of the surface in which the inlet is formed, with a plurality of steps and the top surface of each step being open, and an opening is provided on the top surface of each step of the staircase member for allowing water to flow into the interior of the structure.

7. A wave power generation system according to claim 6, wherein the staircase member is configured to have a shape that extends in one direction, or a shape that is formed along the periphery of the structure.

8. A wave power generation system according to any one of claims 1 to 7, further comprising a structure that surrounds the floating body with a wall surface, the floating body having one or more parallel surfaces parallel to the wall surface of the structure, and the parallel surfaces being provided with sliding means that slide along the wall surface.

9. A wave power generation system according to any one of claims 1 to 8, wherein the transport means comprises: a hollow, cylindrical storage member in which the fluid is stored; an upward channel for raising the fluid from the storage member to a predetermined height; a fixed member connecting the storage member and the upward channel, having an introduction pipe shaped for introducing the fluid stored in the storage member into the upward channel; and a push-up member that pushes the fluid stored in the storage member upward in response to changes in the position of the floating body, and pushes the fluid from the storage member to the upward channel via the introduction pipe, wherein the push-up member has a push-up surface smaller in size than the diameter of the storage member, and has a tapered shape from the push-up surface downward.

10. A wave power generation system according to any one of claims 1 to 8, wherein the transport means comprises: a cylindrical, hollow storage member in which the fluid is stored; an upward channel for raising the fluid from the storage member to a predetermined height; a fixed member connecting the storage member and the upward channel, having an introduction pipe shaped for introducing the fluid stored in the storage member into the upward channel; and a push-up member that pushes the fluid stored in the storage member upward in response to a change in the position of the floating body, and pushes the fluid from the storage member to the upward channel via the introduction pipe, wherein the push-up member has a push-up surface that is larger in size than the diameter of the storage member, and has a tapered shape from the push-up surface upward.

11. A wave power generation system according to claim 9 or 10, further comprising a deformable joining member that joins the storage member and the pushing member, and which contains fluid leaking from the storage member and the introduction pipe when the storage member is pushed up by the pushing member, wherein the joining member has a tapered shape that narrows from the storage member toward the pushing member, and when the pushing member moves up and down, it curls inward from bottom to top or from top to bottom while maintaining the joint between the storage member and the pushing member.

12. A wave power generation system according to any one of claims 1 to 11, further comprising a structure into which at least the floating body, the transport means, the delivery means and the power generation means are incorporated, having a multilayer structure in which a plurality of layers are stacked in the vertical direction, and having a structure in which each layer is assembled without being fixed to the layer below and each layer is independent.

13. A wave power generation system according to any one of claims 1 to 12, further comprising a structure into which at least the floating body, the transport means, the delivery means and the power generation means are incorporated, the structure further comprising a structure that integrally suspends the transport means, the delivery means and the power generation means from the top surface of the structure in a central column manner.

14. A wave power generation system according to any one of claims 1 to 13, further comprising: a structure that surrounds the floating body with a wall surface; and a floating means for floating the structure, which is formed around the structure on a surface different from the wave-direction surface from which the waves arrive.

15. A wave power generation system according to any one of claims 1 to 8, wherein the transport means is formed of multiple means for transporting the fluid to the predetermined height in response to a change in the position of a single floating body, or in response to a change in the position of each of the floating bodies among a plurality of floating bodies, the discharge means collects the fluid transported by the plurality of transport means and discharges it downward, and the power generation means generates electricity using the potential energy of the fluid discharged by the discharge means.

16. A wave power generation system according to claim 15, wherein a plurality of the power generation means are provided, and the collected fluid is sent to each of the power generation means when the sending means sends downward.

17. A wave power generation system according to any one of claims 1 to 16, wherein the floating body has a shape in which the bottom area increases upward from the surface that receives the wave force.

18. A wave power generation system according to claim 4, wherein the structure comprises: a first surface on which the waves arrive and on which the outer opening is formed; a second surface provided opposite to the first surface and on which the inner opening is formed; and an inflow control means for changing the positional relationship between the first surface and the second surface and controlling the inflow of water into the inlet.

19. A wave power generation system according to claim 18, wherein the structure has a laminated inclined plate structure in which at least the inclined portion of the inlet is formed by a plurality of plate-like members that are stacked with a predetermined gap in between, having an inclination in the height direction in which the height of the water surface changes, and the inflow control means controls the inflow of water to the inlet by changing the positional relationship between the first surface and the second surface to adjust at least the inclination angle of the inclined portion of each plate-like member.

20. A wave power generation system according to any one of claims 4, 18, and 19, wherein the plurality of inlets include: a first inlet formed by an inner opening having a first inclination angle that is higher in the height direction than the outer opening; and a second inlet formed by an outer opening having a second inclination angle that is different from the first inclination angle and is higher in the height direction than the inner opening.

21. A wave power generation system according to claim 4, wherein the inlet is formed from at least two or more flow paths having different inclination angles.

22. A wave power generation system according to claim 21, wherein the inclination angle of one of the two or more flow paths constituting the inlet is smaller than or zero than the inclination angles of the other flow paths.

23. A wave power generation system according to claim 8, wherein the sliding means is formed by wheels that roll on the wall surface.

24. A wave power generation system according to claim 8, wherein the sliding means is formed at a position higher than the water surface.

25. A wave power generation system according to claim 8, wherein a stopper member for suppressing the vertical movement of the floating body is formed in the structure.

26. A wave power generation system according to any one of claims 2 to 7, wherein the structure is composed of two or more surfaces, and the inlet is formed on two or more different surfaces of the structure.

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