WO2002038951A1

WO2002038951A1 - Movable object type wave energy converter

Info

Publication number: WO2002038951A1
Application number: PCT/JP2001/009753
Authority: WO
Inventors: Kesayoshi Hadano
Original assignee: Kesayoshi Hadano
Priority date: 2000-11-08
Filing date: 2001-11-07
Publication date: 2002-05-16
Also published as: JP2002147329A; AU2002212724A1

Abstract

A wave energy converter grouped into a primary converter for converting a wave energy into the other mechanical energy, wherein a frame body for partitioning an area of sea is disposed around movable objects and guide side plates (4) are installed at the opening parts allowing seawater to be accessed, the depth (a) of the frame body being formed shorter than 1/6 of the length of the wave caused by the seawater, whereby a horizontal force can be avoided from acting on the support parts of the movable objects installed in the frame body to amplify the amplitude of the vertical movement of the water level around the movable objects.

Description

Description Moving object type wave energy converter Technical field

The present invention relates to a wave energy conversion device, and more particularly, to a highly reliable and highly efficient movable wave energy conversion device. Background art

Wave energy is one of the few energy sources that does not have the pollution associated with the current power generation method and can be supplied endlessly in countries facing the ocean or lakes.Establish technologies for using wave energy This has crucial implications for the future in which the depletion of energy resources is inevitable. For this reason, a great deal of research and development has been performed on wave energy conversion devices. The wave energy conversion device is a primary conversion device for converting wave energy into other mechanical energy, and a secondary energy conversion device for converting the mechanical energy obtained by the primary conversion device into easily usable energy such as electricity. The primary conversion device is composed of a secondary conversion device, a structure, and the like. As a typical method, there are a vibrating water column type and a movable object type.

The oscillating water column type has, for example, a closed air chamber at an upper portion and an opening through which seawater flows in a lower portion as shown in Japanese Patent Application Laid-Open No. H11-2011 (wave power generator). The use of a container having a section, the movement of the water surface waves creates fluctuations in the water surface inside the container and pressure fluctuations in the air chamber, and creates a flow of air due to the pressure difference between the inside and outside of the container. An air turbine as a secondary converter is turned to generate power. '

The vibrating water column type is excellent in structural strength and maintenance because it does not require any moving parts in the primary conversion device, but the container with the closed air chamber must be pressure-resistant and air-tight, and a large amount of steel and It requires concrete, and air turbines are complex and expensive, and have the problem of increasing power generation costs.

Furthermore, because it is difficult to make a large-scale pressure vessel, the sea surface area available for energy conversion is limited to a small one, and the energy conversion scale must be small. There is a problem that can not be obtained.

The movable object type takes in the power of a movable object placed near the water surface to sway due to the movement of the water surface wave.However, the movable object force ^ The structure of the part that supports the movement of the movable object on which the complex force acts The development was stalled due to the problem of strength. As a technology for solving this problem, a method using a wire, a movable object, a counterweight, and a pulley (for example, Japanese Patent Application Laid-Open No. 08-240174 Water Surface Wave Energy Converter) has been proposed. However, there remains a problem that a heavy moving object sways back and forth and left and right, and complicated horizontal forces are applied to the device, particularly to the support of the pulley.

Also disclosed is a technology (Japanese Patent Application Laid-Open No. H06-3300842, a wave power generation device) for providing an oscillating body at each division of a floating structure formed by division walls provided radially from the center. However, since the outside is completely open, the moving body is directly moved by the invading waves, leaving the problem that the rocking body and the support shaft receive complicated horizontal forces.

As a technique of providing a frame that separates a water area around a movable object, a technique of providing a cylinder-type breakwater having an opening at a lower portion on the sea side and arranging a biston-type float inside the breakwater (Japanese Patent Application Laid-Open No. — No. 2 8 5 9 5 7) is disclosed, but there is no means to amplify the water surface vibration inside the cylinder type breakwater, which is disadvantageous in terms of gaining wave energy.

In addition, a technology in which an inner cylinder (movable object) is installed in a cylinder (outer cylinder) with many seawater inlets / outlets (Japanese Utility Model No. 01-166 6277) Power engine) is disclosed, but also has no means for amplifying the water surface vibration in the outer cylinder, which is disadvantageous in terms of energy gain.

As a technology to amplify the water surface vibration, the wave energy existing from the water surface to the water bottom is concentrated on the water surface with a bottom plate with variable depth side walls and collected using a floating body with a forward thrust plate and a rear thrust plate. Although a system (Japanese Patent Application Laid-Open No. 08-169580 / A wave energy utilization apparatus) is disclosed, a floating body and a support shaft do not have a frame plate for partitioning a water area around a movable object. Have not been able to solve the problem of receiving complex horizontal forces. The present invention has been made in view of the above-described circumstances related to the wave energy conversion device, and A harmful force can be prevented from acting on the holding part, the amplitude of vertical movement of the water surface around the movable object can be made larger than the amplitude of vertical movement of the water surface outside, and large-scale wave energy conversion is possible. It is an object of the present invention to provide a highly efficient movable object type wave energy conversion device. Disclosure of the invention

The present invention provides a frame body that partitions a water area around a movable object, the frame body has an opening through which water enters and exits below the water surface of a front wall of the frame, and a guide that sandwiches the opening laterally outside the opening. It has side plates and the distance between the front wall of the frame and the rear wall of the frame does not exceed 1/6 of the wavelength of the wave formed on the water surface. In addition, the distance between the front wall of the frame and the rear wall of the frame should not exceed twice the horizontal length of the plan inner plate. Further, the frame body has a guide bottom plate whose outside is inclined toward the water bottom in order to introduce water that has entered below the opening by the action of waves into the opening outside the opening of the frame. Furthermore, the frame has a frame bottom plate at the lower end of the frame. Further, the frame body has a guide upper plate whose outside is inclined toward the water surface in order to smoothly introduce water that has entered above the opening portion by the action of the waves into the opening portion.

According to the present invention, the movement of the water around the movable object can be controlled in a desired direction by the frame provided around the movable object, so that harmful force can be prevented from acting on the movable object support. As a result, the size of the movable object can be increased. Further, since the frame of the present invention does not require pressure resistance and airtightness, it can partition a relatively large water surface area. This has the effect of enabling large-scale moving-object-type wave energy conversion, which has been difficult in the past. Furthermore, by providing guide side plates that have an appropriate relationship between the depth of the frame and the length in the horizontal direction, the opening of the frame is sandwiched on the left and right, so that a wide range of wave energy can be provided around the movable object. Since the integration can be performed effectively, the amplitude of the vertical movement of the water surface around the movable object can be made larger than the amplitude of the vertical movement of the outer water surface, enabling highly efficient movable object type wave energy conversion.

Further, as a preferred embodiment of the large-scale wave energy conversion system, there is provided a movable object type wave energy conversion device configured by arranging a plurality of the frames described above in a substantially straight line or a cylindrical shape. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a two-sided view of (a) a perspective view and (b) a cross-sectional view showing an embodiment of a schematic configuration in which four frames having guide side plates according to the present invention are arranged on a substantially straight line. FIGS. 2A and 2B show an embodiment of a schematic configuration in which four frames further including a guide bottom plate according to the present invention are arranged on a substantially straight line. FIG. 2A is a perspective view, and FIG. It is. FIG. 3 shows an embodiment of a schematic configuration in which eight frames further including a guide bottom plate and the like according to the present invention are arranged in a substantially cylindrical shape, wherein (a) is a perspective view, and (b) is a cross-sectional view in two views. is there. BEST MODE FOR CARRYING OUT THE INVENTION

According to the present invention, first, a frame for partitioning a water area around a movable object in order to avoid a harmful force acting on the movable object support portion and to enable large-scale movable object type wave energy conversion. Provide. The frame provided around the movable object can control the movement of water around the movable object in a desired direction, and can prevent harmful forces from acting on the movable object support. As a result, the size of the movable object can be increased. Further, since the frame of the present invention does not require pressure resistance and airtightness, it can partition a relatively large water surface area. In this way, large-scale movable-type wave energy conversion, which has been difficult in the past, is enabled. Next, according to the present invention, the amplitude of the vertical movement of the water surface around the movable object is made larger than the amplitude of the vertical movement of the outer water surface to enable highly efficient movable object type wave energy conversion. The distance between the front wall of the frame and the rear wall of the frame to prevent the accumulated wave energy or to prevent it from dissipating to the left and right, and to transfer the accumulated wave energy to the water around the movable object effectively. Hereinafter, it may be referred to as the depth of the frame.) Make sure that the wavelength does not exceed 1/6 of the wavelength of the wave formed on the water surface. Thereby, the amplitude of the vertical movement of the water surface around the movable object can be made larger than the amplitude of the vertical movement of the water surface outside the frame.

In addition, the distance between the front wall of the frame and the rear wall of the frame shall not exceed twice the horizontal length of the guide side plate. According to this condition, the wave formed on the water surface (incident wave) and the reflected wave formed by this wave being reflected by the rear wall of the frame are composed of the rear wall of the frame, the side wall of the frame, and the guide side plate. In addition, the resonance in the “rectangular bay 內” is added, and the amplitude of the vertical movement around the movable object is larger than the amplitude of the vertical movement outside the frame. Can be done.

In addition, by providing a guide bottom plate whose outside is inclined toward the water bottom, water that has penetrated below the opening by the action of waves can be introduced into the opening, and the water surface vibration in the frame can be further amplified. . Further, the frame bottom plate provided at the lower end of the frame prevents water flowing through the opening from dissipating to the lower side, and is effective in amplifying the water surface motion in the frame. In addition, as a preferred embodiment of the frame bottom plate, the water bottom vibration having an inclined surface is amplified by using a frame bottom plate having an inclined surface so that the flow of water flowing from the opening can be smoothly converted in the vertical direction. It is even more effective in doing so. In addition, the upper guide plate whose outer side is inclined toward the water surface allows the water that has entered the upper side of the opening due to the action of waves to be smoothly introduced into the opening, further amplifying the water surface vibration inside the frame. be able to. The upper guide plate may be of any shape as long as it has a shape that can smoothly introduce the water that has flowed into the opening, and for example, a linear one that is inclined or a curved one can be used. The detailed shape does not limit the present invention at all.

According to the above-described embodiment, the present invention makes the amplitude of the vertical movement of the water surface around the movable object larger than the amplitude of the vertical movement of the outer water surface, thereby enabling highly efficient movable object type wave energy conversion.

Next, the present invention, as a preferred embodiment of a large-scale wave energy conversion system, comprises a plurality of the above frames arranged in a substantially linear or cylindrical shape to constitute a movable object type wave energy conversion device. I do. The main installation points of the wave energy conversion device of the movable object type according to the present invention are in front of a breakwater or large floating body facing the open sea, or in front of a breakwater or quay, and in this case, a plurality of frames are arranged. It is preferable to configure a large-scale wave energy conversion system.

When arranging in front of a port structure such as a breakwater or a large floating structure, it is preferable that the frame be constructed in a substantially straight line. The front wall of the frame is made of concrete, etc., so that the water level fluctuates in the height range, and the side walls of the frame are separated at intervals so that the water surface rises and falls almost uniformly. However, the frame of the present invention can be constructed relatively inexpensively. It is also possible to install the main part of the frame inside breakwaters or large floating bodies. It is possible to construct a frame at a lower cost.

In the case of independent arrangement in front of a breakwater or quay, a method of standing uprights from the sea floor and fixing it, or a method consisting of a floating body can be used. By providing a movable object type wave energy conversion device in which a plurality of frames according to the present invention are arranged on a substantially straight line in a water area in front of a harbor structure such as a breakwater or a quay wall, the energy is reduced when a high wave comes. Since it absorbs part of the seawater, it plays a role of wave extinction, reducing the design pressure of the port structure and making its design conditions advantageous. It is also possible to promote wave extinction by designing with an appropriate spacing '.

In the case of arranging in a floating state at a distance of more than several tens of meters from the quay, it is best to construct a movable object type wave energy conversion device by arranging a plurality of frames related to the present invention in a substantially cylindrical shape. preferable. By adopting a generally cylindrical shape, it can cope with waves from all directions, improving the stability of the structure.Furthermore, the guide plates provided on the left and right sides of the opening can be provided radially, Can further increase the wave collection effect. The term “substantially cylindrical shape” does not require a cylindrical shape, but means that a polygonal shape may be used.

As described above, the present invention relates to a method for controlling the motion of water around a movable object in a desired direction and concentrating wave energy on the water surface around the movable object. The primary energy conversion mechanism, the secondary energy conversion device, and the like, including other movable objects, are known in the related art, for example, Japanese Patent Application Laid-Open No. 08-240174, Techniques disclosed in Japanese Utility Model Application No. 01-166,277, Japanese Patent Application Laid-Open No. 56-170,770, and the like can be used, and these do not limit the present invention in any way. Absent.

Therefore, also in the embodiments described below, the description will focus on the structure around the movable object, which is a feature of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

As a first embodiment, a movable object type wave energy conversion device in which a plurality of frames having guide side plates according to the present invention are arranged on a substantially straight line will be described. FIGS. 1A and 1B are two perspective views of (a) a perspective view and (b) a cross-sectional view showing an embodiment of a schematic configuration in which four frame bodies having guide side plates according to the present invention are arranged on a substantially straight line. The cross-sectional view (b) is It is sectional drawing which cut | disconnected the center of one frame vertically by the wave propagation direction. In FIG. 1, a frame main body that partitions a water area around a movable object is composed of a frame rear wall 1, a frame side wall 2, and a frame front wall 3. Reference numeral 4 denotes a guide side plate, and the frame body depth _a is configured so as not to exceed twice the horizontal length b of the guide side plate 4. The front wall 3 of the frame is shallower than the rear wall 1 of the frame and the side wall 2 of the frame, and an opening for entering and exiting seawater is formed therebelow. The movable object (not shown) is placed inside the frame body consisting of the frame rear wall 1, the frame side wall 2, and the frame front wall 3. Note that the depth a of the frame of the guide side plate 4 formed by the frame rear wall 1, the frame side wall 2 and the guide side plate 4 is about 1/6 of the wavelength of the wave formed on the water surface. And the horizontal length b (a + b) is preferably about 1 to 4 of the wavelength of the wave (hereinafter referred to as L).

Next, the operation of the present embodiment configured as described above will be described.

The guide side plate 4 sandwiching the opening on the left and right accumulates the wave energy of the traveling wave or prevents it from dissipating to the left and right. The accumulated wave energy is effectively transferred to the water area of the movable body because the proper relationship between the depth a of the frame body and the horizontal length b of the guide side plate 4 is secured.

Here, the relationship between the frame depth _a , the horizontal length b, and the wavelength L of the wave will be described in detail.

First, generally, waves are reflected when they hit walls such as breakwaters. The wave (incident wave) and the reflected wave at this time are so-called overlapping waves, and their behavior is widely known. In other words, it has a "node of the overlap wave" where the water particles move only up and down and the amplitude is maximum, and a "node of the overlap wave" where the water particles move only left and right and the amplitude of the top and bottom is 0 . At the antinode of the overlap wave, the amplitude of the incident wave and the amplitude of the reflected wave overlap, so that it is twice the amplitude of the incident wave (hereinafter denoted as H). The antinode of the overlapping wave is formed at the position of the wall and at a position half a wavelength of the wave away from the wall, and the node of the overlapping wave is located at a position 1/4 wavelength of the wave away from the wall and 3/4 wavelength away from the wall Formed in position. Therefore, the amplitude of the overlap wave is expressed as 2H cos (2πx / L), where the wall position is 0 and the distance from the wall is X.

Next, the behavior of this overlapping wave is applied to this frame body. In the frame body shown in FIG. 1, waves enter from the direction indicated by the arrow, and when the waves hit the rear wall 1 of the frame, reflected waves are generated on the rear wall 1 of the frame. The reflected wave generated at the rear wall 1 of the frame overlaps with the incident wave A wave is formed, and an antinode of the overlapping wave is formed on the rear wall 1 of the frame, where the amplitude of the wave is twice as large as that of the wave. However, the amplitude changes with the cos function as the distance from the rear wall 1 of the frame increases, and the horizontal component of the water particles gradually becomes dominant. As described above, since the movable object (not shown) is placed in the frame body composed of the frame rear wall 1, the frame side wall 2, and the frame front wall 3, the reference numeral a in FIG. Naturally, it is desired that the amplitude of the vertical movement of the shown frame depth is large. Therefore, horizontal movement of the water particles is not preferable, and it is necessary to make vertical movement inside the frame as much as possible. For this purpose, it is desirable that the amplitude inside the frame be larger than the amplitude (H) of the incident wave. Then, solving the equation (1) where x = a in the above equation of the cos function,

2 H cos (2πa / L)> H (1)

aku L / 6 (2)

Becomes That is, as shown in equation (2), it can be seen that if the depth a of the frame is made smaller than the wavelength of 1 Z6, the amplitude becomes larger than H at any position inside the frame. That is, the amplitude of the vertical movement of the water surface inside the frame becomes larger than the amplitude of the incident wave.

'On the other hand, the distance from the front edge of the guide side plate 4 to the front wall 3 of the frame, that is, the sum of the horizontal length b of the guide side plate 4 and the depth a of the frame (a + b) becomes 1/4 wavelength of the wave. In this case, the incident wave and the reflected wave form an overlap wave and resonate, so that the front of the side plate 4 is a node of the overlap wave. This phenomenon is widely known as a water surface resonance phenomenon. If there is a rectangular bay with a length of y, and the amplitude of the incident wave is H, the amplitude s at the depth of the bay is given by the following equation (3).

s = H c os (k y) (3)

The cos (ky), which is the denominator of this equation (3), becomes 0 when y / L = l / 4, 3/4, ..., (2m + 1) / 4. s becomes infinite. This is the resonance phenomenon.

When this rectangular bay is applied to the frame in the embodiment of the present invention, the length y of the bay is the sum of the horizontal length b of the guide side plate 4 of the frame and the depth a of the frame (a + b). This is the case. That is, (a + b) = LZ4. In this equation, if L is eliminated using equation (2), a <2b is derived. By maintaining such a relationship, the amplitude of the vertical movement in the frame can be made larger than the amplitude of the incident wave.

According to this embodiment, the movement of the seawater around the movable object is controlled in the vertical direction by the frame provided around the movable object, so that a harmful force acts on the movable object support. As a result, the size of the movable object can be increased. Further, since the frame of the present invention does not require pressure resistance and airtightness, it can partition a relatively large sea surface area. In this way, large-scale movable-object-type wave energy conversion, which has been difficult in the past, becomes possible. Furthermore, since wave energy can be effectively accumulated in the frame provided around the movable object, the amplitude of the vertical movement of the water surface around the movable object is larger than that of the outer water surface, and a highly efficient movable object type Wave energy conversion becomes possible.

As a second embodiment, a movable object type wave energy conversion device in which a plurality of frames having a guide bottom plate and the like according to the present invention are arranged on a substantially straight line will be described. FIGS. 2A and 2B are two perspective views of (a) a perspective view and (b) a cross-sectional view showing an embodiment of a schematic configuration in which four frame bodies further including a guide bottom plate and the like according to the present invention are arranged on a substantially straight line. . In the second embodiment, a guide bottom plate and the like are further added to the first embodiment. The same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted. Will be described.

In FIG. 2, 5 is a guide bottom plate, 6 is a frame plate bottom plate, 7 is a guide upper plate, and other configurations such as a frame rear wall 1 are the same as those of the first embodiment.

In the present embodiment configured as described above, the operation of the guide side plate 4 and the operation of the proper relationship between the depth of the frame and the horizontal length of the guide side plate 4 are the same as those of the first embodiment. Further, the seawater that has entered below the opening due to the action of the waves is guided to the opening along the guide bottom plate 5, and the seawater that has entered above the opening due to the action of the waves travels along the upper guide plate 7. The seawater is smoothly guided to the opening and forms a seawater flow that flows into the opening together with the seawater traveling toward the opening. The seawater flow flowing into the frame body from the opening is smoothly converted into a vertical flow along the inclined frame plate bottom plate 6. According to this embodiment, since a wider range of wave energy can be effectively accumulated in the frame provided around the movable object, the amplitude of the vertical movement of the water surface around the movable object is smaller than that of the outer water. It becomes even larger than the amplitude of the vertical movement of the surface, enabling highly efficient moving-object-type wave energy conversion.

Next, as a third embodiment, a movable object type wave energy conversion device in which a plurality of frames having a guide bottom plate and the like according to the present invention are arranged in a substantially cylindrical shape will be described. FIGS. 3A and 3B are two side views of (a) a perspective view and (b) a cross-sectional view showing an example of a schematic configuration in which eight frame bodies further including a guide bottom plate according to the present invention are arranged in a substantially cylindrical shape. . The cross-sectional view (b) is a cross-sectional view obtained by cutting the center of one frame vertically in the wave traveling direction. The configuration of the frame of the third embodiment is almost the same as that of the second embodiment. The side wall and the guide side plate form a side wall on the body, and the guide bottom plate and the frame bottom plate are formed on the body. A bottom plate is formed. That is, in FIG. 3, 1 is a frame rear wall, 3 is a frame front wall, 7 is a guide upper plate, 12 is a side wall, 15 is a bottom plate, and a frame body that partitions a water area around a movable object is The frame rear wall 1, a part of the side wall 12 (inside the side wall 12), and the frame front wall 3, the outside of the side wall 12 has the function of the guide side plate, and the outside of the bottom plate 15 Has the function of the guide bottom plate, and the inside of the bottom plate 15 has the function of the frame bottom plate.

The operation and effects of this embodiment are almost the same as those of the second embodiment, but since the side walls 12 are arranged in a radiating manner, the side walls 12 have a larger wave collection effect, and the vicinity of the movable object Water surface movement can be further amplified. In addition, since the energy of waves invading from all directions can be used, there is no restriction on the sea area where the waves are located.

The diameter of the rear wall of the frame is 15π! If it is formed of a cylindrical floating body of about 3 Om and is covered with a roof up to the front wall of the frame, a low-cost energy conversion device (not shown. Can be protected from wind and rain, and maintenance costs can be reduced. Also, by installing appropriate intervals along the direction of travel of frequent waves, effective wave energy extraction and wave extinction can be achieved with a small amount of material.

In addition, a roof is provided on the circumference from the rear wall of the frame to the tip of the upper guide plate, and a function to generate buoyancy is provided in the generally V-shaped part formed by the rear wall of the frame and the upper guide plate. A floating body can also be constructed.

While the embodiments of the present invention have been described in detail, various changes may be made in the form and details without departing from the spirit and scope of the present invention defined in the claims. It is clear that

For example, the guide bottom plate is extended to the same position as the guide side plate in the above embodiment, but may be extended halfway to the guide side plate, or may be extended to the tip of the guide side plate. The same applies to the upper guide plate.

Further, in the above-described embodiment, the frame body is configured vertically so that the seawater in the frame body moves up and down. For example, the wave progresses between the rear wall of the frame and the front wall of the frame. By tilting in the direction, the flow of seawater traveling near the sea surface through the opening and reaching the sea surface of the frame body is generally V-shaped, so that the flow of seawater is further smoothed and the water surface around the movable object The movement can be further amplified. · Still further, in the above embodiment, a movable object type wave energy conversion device in which a plurality of frames according to the present invention are arranged! _As described above, it goes without saying that the present invention can be implemented without any limitation on the number of frames to be arranged. Industrial Possibilities.

As described above, the movable object type wave energy conversion device according to the present invention can convert wave energy into other mechanical energy in the open sea, lakes, marshes, and harbors. It is useful as a primary conversion device among the representative energy conversion devices.

Furthermore, if it is placed in front of or in front of a breakwater or quay in a harbor, it absorbs high-wave energy, so it is also suitable as a wave absorber.

Claims

The scope of the claims

1. A frame body for partitioning a water area around a movable object is provided. The frame body has an opening through which water enters and exits below the water surface of a front wall (3) of the frame, and the opening is provided outside the opening. It has a guide side plate (4) sandwiched between left and right, and the distance (a) between the front wall (3) and the rear wall (1) of the frame is smaller than one sixth of the wavelength of the wave formed on the water surface. A moving object type wave energy converter characterized by being short.

2. A frame for partitioning a water area around the movable object is provided. The frame has an opening through which water enters and exits below the water surface of the front wall (3) of the frame, and the opening is provided outside the opening. It has a guide side plate (4) sandwiched between left and right, and the distance (a) between the frame front wall (3) and the frame rear wall (1) is the horizontal length (b) of the guide side plate (4). A moving-body wave energy conversion device characterized by not exceeding twice.

3. The frame is provided with a guide bottom plate whose outside is inclined in the direction of the water bottom, in order to introduce water that has penetrated below the opening by the action of waves into the opening outside the opening of the frame. 5) The movable body type wave energy conversion device according to claim 1 or claim 2, characterized by having the following.

4. The movable object type wave energy conversion device according to claim 1, wherein the frame has a frame bottom plate (6) at a lower end of the frame.

5. The frame has a guide upper plate (7) whose outside is inclined toward the water surface in order to smoothly introduce water that has entered above the opening by the action of waves into the opening. Movable object type wave energy conversion as defined in Claim 1 or Claim 2

6. A movable object type wave energy conversion comprising a plurality of frames according to claim 1 or claim 2 arranged in a substantially linear or cylindrical shape. apparatus.