JPS60204974A - Fixed type wave-energy collecting apparatus - Google Patents

Abstract

PURPOSE:To seize wave energy in high efficiency independently of the direction of advance of waves by arranging at least two air chambers in the peripheral direction. CONSTITUTION:A case body 1 is constituted of an upper-surface plate 2 and a peripheral plate 5. The case body 1 is formed into a cylindrical air chamber 3 having the bottom surface 6 as opened edge surface. Said case body 1 is supported by a supporting body 8 so that the lower edge 5B of the peripheral plate 5 is sunk under the surface of the sea. The air chamber 3 is divided into a plurality of air chambers on the circumference. Each air vent hole 7 is formed into each divided air chamber. Said air vent 7 communicates to an air turbine and other energy generating means.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fixed wave energy harvesting device installed in waves on a coast, a reef, or the ocean to convert wave energy into electric power or other useful energy.

Energy generated in the ocean, such as wave power other than the tides, ocean currents, temperature differences, concentration differences, and living organisms, is inexhaustible renewable energy sourced from the sun, and as a soft energy path, it is possible to permanently harvest this ocean energy. The creativity of the energy system is essential for human survival 113171
It is said that At present, attempts at wave power generation are being made in various fields, but conventional intake ports for collecting wave energy are opened perpendicular to waves that have a specific direction of travel. Although the propagating wave energy is efficiently collected, the direction in which the waves travel changes every moment due to external factors such as wind direction and tide, and in the case of waves traveling so that the angle of incidence is 0 with respect to the intake port. The wave energy component multiplied by μsσ is dissipated outside the intake port and is not collected, and as a result, an excessively large wave energy harvesting device is required to capture a predetermined amount of wave energy. However, wave power generation has a fundamental problem that increases the cost of power generation.

The present invention has been made with attention to this point, and the apparatus of the present invention will be described in detail in connection with the embodiments disclosed with reference to the accompanying drawings. The figure is a plan view showing the cross section of FIG. The cylindrical air chamber Kokutai l forming the air chamber 8 has the upper end of the strut 8 projecting to the sea surface lO of the strut body 8 erected on the seabed surface 9 so that the lower end 5B of the circumferential plate is submerged in the sea surface 10. (2) The air chamber 8 has a radial depth dimension a along the radial direction from its center toward the circumferential plate 6, on the upper surface plate inner surface 2B and the circumferential plate inner surface 5C. The partition plate 4 is fixed, and the inside of the air chamber 8 is
A front divided air chamber 8A on the side where the waves are advancing;
Horizontally divided air chamber 80 into which the f1 wave advances with an incident angle
and 8D, the front divided air chamber 8AO) is divided into the rear divided air chamber 8B on the back side, that is, the downstream side in the direction of wave propagation. , a ventilation hole 7 is formed in the top plate 2, respectively, and is configured to communicate with an air turbine or other energy generating means (not shown).

FIG. 8 and FIG. 4 are a longitudinal cross-sectional view and a plan view showing a Rollo cross-section of the second embodiment.
A protruding plate 11 is formed by extending the partition wall plate 4 outwardly and below the bottom surface 6 of the national body.

In Figures 2 and 4, when the mountain of waves advancing from the X direction reaches the national air chamber 1, the sea level 10 in the front air chamber BA rises, and at the same time, the horizontally divided air chambers 8C and 8D rise.
And the inside of the rear divided air chamber 8B also changes to the sea level lO due to wave diffraction.
rises, the air in each of the divided air chambers 8A, 8C, 8D and 8B is compressed to reduce its volume, the wave energy is converted to pressure energy, and the compressed air passes through the vent 7 to the energy generating means. However, when the trough of the waves reaches, contrary to the above, the sea level lO in each of the divided air chambers 8A, BC, 8D, and 8B drops. It acts by repeating both strokes of inhalation. Device of the present invention.

In this case, the air chamber 8 is divided as described above, and the divided air chambers 8A, 8C, 8D, and 8B do not communicate with each other, so the air in the divided air chamber 8A is at a high temperature before the wave reaches its maximum. This makes it possible to collect a large amount of wave energy, but even if the traveling direction of the waves is tilted with respect to the X direction and arrives at an angle of incidence, each divided air chamber 8A
, 8C18D, and 8B act as the front divided air chamber 8A, and the divided air chambers, which become the horizontal divided air chamber and the rear divided air chamber, also act to collect wave energy by the diffraction phenomenon as described above. The amount of wave energy harvested is larger than conventional methods. The characteristic curve shown in FIG. 5 shows the depth dimension of each divided air chamber 8A-18c, 8D, and
The ratio a4 between the depth dimension a of the partition wall plate 4 shown in the figure and the wave wavelength λ is plotted on the horizontal axis, and the energy harvesting efficiency is plotted on the vertical axis. This is a dimensionless display of the experimental values when the incident angle is 0 degrees, 22.5 degrees, and 45 degrees, but the energy harvesting efficiency curve for a/2 is not related to the incident angle, and
．． For medium 0.2 to 0.22, it shows the maximum value (0,85), and in the range of a/2 = 0.08 to 0.4, l>
E indicates that o, b, and clarifies the above-mentioned action of the device of the present invention.

:Energy extraction efficiency EI: Wave energy incident on the device of the present invention E! SA' Harvesting energy of the front divided air chamber 8A EBB" Harvesting energy of the rear divided air chamber 8B E5c% E5D: Harvesting energy of the horizontally divided air chambers 8C and 8D Also, fixed wave energy harvesting Il used in the experiment shown in FIG.
The air chamber of the device is cylindrical with a diameter of 2.5611 mm, and the wave height is 5 Bm and 10 mm.

The characteristic curve of the wSG diagram has the wave period of 1 second as the horizontal axis, and the vertical axis as the total harvested energy Eat=E3A+E3B+ESC+"
SD is taken, and the total harvesting energy curve with respect to the wave period T is shown by the same experiment as in Fig. 5, and the total harvesting energy E
This shows that at changes depending on the wave period Tl, but has no relation to the incident angle. The wave height in this experiment was 50 cII. Figure 7 shows the total harvested energy curve similarly to Figure 6, but the air chamber used in this experiment was cylindrical with a diameter of 2.56 cm. However, unlike the first embodiment, the air chamber 8 has a front divided air chamber 8A and a rear divided air chamber 8B.
, and the total extraction energy curve I / 啼 is for the front divided air chamber 8A? The experimental values when the angle of incidence of & wave is 0 degree, the total extraction energy curve) are the angle of incidence of 46 degree and 9
Experimental values at 0 degrees are shown. Unlike the *11 waves shown in FIGS. 5 and 6, the influence of the angle of incidence appears for waves with a wave period of 4 seconds or more.

Note that the wave height is 60!11.

Figure 8 also shows the total harvested energy curve, but with air chamber 8
A first embodiment in which the divided air chambers 8A, 80° 8D and 8B are divided into chambers, and a protruding plate as shown in FIG. 8 by extending only the two partition plates 4 forming the front divided air chamber 8A. 11, the total extraction energy curve ( ) is for the former, and the total extraction energy curve ( ) has a length of 88 cm outward from the outer surface 5A of the circumferential plate. This is an experimental value obtained by forming the partition wall plate 4.

The wave height is 60 cIN, but the diameter of the air chamber Kokutai l is 2
．． 56111 and the depth dimension a is 681:m, which is the same in each experiment.

The configuration and operation of the savior are such that the fixed wave energy harvesting device of the present invention has high collection efficiency and can capture a large amount of wave energy, regardless of the direction of movement of waves, that is, the angle of incidence. It is highly effective in promoting the practical application of

The number of divided air chambers 8A, 8B, 8C, etc. can be determined arbitrarily depending on sea conditions to match the wave shape, wave height, wave period, etc., and to collect the maximum amount of wave energy. The number of J protruding plates 11 can be determined in the same manner. The air chamber 1 is not limited to being installed around the upper end 8' of the support column 8, but may be installed above the sea surface by sinking the lower edge 5B of the surrounding plate into the sea surface 10, depending on the application. Any structure may be used. Further, the air chamber housing 1 may also have a shape other than a cylinder depending on the purpose, and the ventilation holes 7 may also be arranged in the divided air chambers 3A, 3B, etc.
・Top plate 2 so as to communicate with the energy generating means.
It may be perforated in an appropriate wall surface of each divided air chamber other than the above.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional view of the first embodiment, Fig. 2 is a plan view thereof, and Fig. 3 is Fig. 251! A vertical sectional view of the example, FIG. 4 is a plan view of the same,
Figures 5, 6, 7, and 8 are characteristic curves based on experimental values. 1...Air chamber housing 2-...Top plate 3...Air chamber 3A...Front divided air chamber 3B...Rear divided air chamber 3 (
! , 3D--Horizontal divided air chamber 4--Partition plate 5...
Circumferential plate 5B...lower edge of circumferential plate Patent applicant Rokuhoshi Co., Ltd. Fig. 2 Fig. 4 Fig. 3 Fig. 6 T (sec) Fig. 5% Fig. 8 T (sea) Fig. 7 T ( sec)

Claims (1)

[Claims] 1. Surrounded by a top plate and a circumferential plate hanging from the periphery of the top plate,
An air chamber with the bottom surface of the national body as an open end surface is formed inside the air chamber body, and partition plates are fixed to the inner surface of the upper surface plate and the inner surface of the circumferential plate from the center of the air chamber toward the circumference, thereby dividing the air chamber into two or more chambers. Each divided air chamber is divided into air chambers, and ventilation holes are drilled in the walls of each divided air chamber to communicate each divided air chamber with the energy generating means. A fixed wave energy harvesting device that is constructed above the sea surface. 2. Surrounded by a top plate and a circumferential plate hanging from the periphery of the top plate,
An air chamber with an open end at the bottom of the air chamber is formed inside the air chamber, and a partition plate is fixed to the inner surface of the top plate and the inner surface of the circumferential plate from the center of the air chamber toward the circumferential plate, so that the air chamber can be divided into two or more chambers. Each divided air chamber is divided into divided air chambers, and the partition plate is extended outward from the outer surface of the circumferential plate and downwardly from the bottom of the body to form a protruding plate, and a ventilation hole is provided in each divided air chamber to communicate each divided air chamber with the energy generating means. A fixed wave energy harvesting device characterized in that an air chamber is installed above the sea surface so that the lower edge of the peripheral plate is submerged in the sea surface. 8. The air chamber has a cylindrical shape with a circumferential plate as a side surface that is vertically disposed on the periphery of the upper plate, and the air chamber is divided into four divided air chambers by partition plates. The fixed wave energy harvesting device according to item 1. 4. The air chamber body is made into a cylindrical shape with the circumferential plate installed perpendicularly on the periphery of the top plate as the side surface, and the air chamber is divided into four divided air chambers by partition plates, and one chamber in the divided air chamber is formed. The fixed wave energy harvesting device according to claim 2, characterized in that the protruding plate is formed by extending two wall partition plates outward from the outer surface of the circumferential plate and below the bottom surface of the national body.