JPS6345508B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a multidirectional wave power conversion device that is installed in shallow waters or at a point where the angle of incidence of waves is relatively narrow due to topography, etc., and obtains motive power from wave energy.

As is well known, in shallow waters, the distance from the coastline is short, so large wind waves do not occur from this direction, and most of the wind and waves are caused by waves from offshore. Generally, waves in this sea area have a strong correlation with the water depth line and the shoreline, and the wave direction appears in a direction perpendicular to the bathymetric line or the shoreline.
A similar phenomenon is also observed in the inner bay area. Figure 1 shows a correlation diagram between wave height and wave direction at Port S. The wave height was measured using a -14m wave height meter, and the wave direction was measured using a millimeter wave radar. still,
The solid line A indicates the maximum significant wave height estimation curve, and the broken line B indicates the direction perpendicular to the shoreline.

FIG. 2 shows a case where an embankment-type wave power conversion device is provided for the appearance of wave directions as described above. In the case of such an embankment body type, not only can wave energy be captured only within a range of 180° in front of the embankment body 31, but even if the embankment body 31 is arranged perpendicular to the direction of the most frequently occurring waves and is installed inside the embankment body 31. Even if the opening 32 that communicates with the air chamber 33 is oriented in the direction of the most frequently occurring waves,
Additionally, wave energy decreases by 10% due to wave directionality.
It is difficult to extract wave energy efficiently.

In addition, in terms of safety, in the case of the embankment type, there is less waves going around, so a large amount of wave force acts on the embankment. Therefore, in order to install the dam body stably, it is necessary to increase the volume or weight of the dam body against the wave force, and the strength of other structures must also be increased, which is uneconomical. .

Furthermore, in the case of an embankment type, the installation location is limited, and the back of the embankment is turned into an inward bay, which causes seawater to stagnate, which has a large impact on the environment, including sea conditions, water quality, and marine biota.

In FIG. 2, numerals 3 and 4 are, for example, air turbine generators that generate electric power using the airflow generated inside the air chamber 33.

This invention was made based on the above-mentioned circumstances, and its purpose is to arrange a plurality of air chambers that convert wave energy into airflow in a substantially arc shape in the direction of wave propagation centered on the direction of the maximum wave height. By doing so, the present invention aims to provide a multidirectional wave power conversion device that is capable of extracting wave energy extremely efficiently in accordance with wave direction distribution and has extremely little impact on the marine environment.

An embodiment of the present invention will be described below with reference to the drawings.

In FIGS. 3 and 4, reference numeral 41 denotes a substantially cylindrical fixed base installed in the sea, with a heavy object such as sand stored inside. An exterior body 42 is provided on this fixed base 41 eccentrically thereto, and the fixed base 41 is covered by this exterior body 42 . A plurality of partition walls 43 are provided between the exterior body 42 and the fixed base 41 at a predetermined distance.
A plurality of air chambers 44 each having a generally fan-shaped cross section are formed by the partition wall 43, the fixing base 41, and the exterior body 42. Note that the partition wall 43 is connected to the fixed base 4
1 to the base surface of 1. The air chambers 44 are arranged in a substantially arc-shaped manner sequentially in the direction of wave propagation, starting from the one with the largest volume, centered on the direction of the largest number of waves (indicated by arrow C in FIG. 4). This air chamber 4
4 is an opening 45 provided at the lower end of the exterior body 42
It is connected to the ocean by.

On the other hand, partition walls 46, 47, and 48 are provided on the upper surface of the fixed base 41 in a substantially concentric manner, and the fixed base 41
An air tank 49 separated from the air chamber 45 on the upper surface of the
is provided. The exterior body 42 located above the partition wall 47 is separated by the partition wall 47, and the air chamber 4 is separated from the partition wall 47.
An intake/exhaust hole 50 communicating with air tank 4 and an intake hole 51 communicating with air tank 49 are provided, respectively. Further, a reciprocating flow turbine 52 is provided in each of the partition walls 48 corresponding to the air chamber 44, and a rotating shaft 53 of the turbine 52 passes through the partition wall 47 and is connected to an air compressor 54 provided in the partition wall 46, respectively. Concatenated. The turbine 52 is rotated in a fixed direction by an air flow between the air chamber 44 and the intake/exhaust hole 50 (solid line arrows in the figure) generated by changes in wave motion within the air chamber 44 (dotted line arrows in the figure). This rotational force is transmitted to the air compressor 54 via the rotating shaft 53, and the compressor 54 takes in outside air from the intake hole 51. This outside air is accumulated in the air tank 49 via the check valve 55. This air tank 4
A partition wall 56 is provided concentrically in the center of 9.
This partition wall 56 is provided with a flow rate regulating valve 5 at a predetermined interval.
7. A nozzle 58 is provided. A main air turbine 59 is provided inside this partition wall 57, and this turbine 59 is connected by a rotating shaft 60 to a generator 61 provided on a fixed base 41. The main air turbine 59 is connected to an air tank 49 via a flow rate regulating valve 57.
Smooth and compressed air inside is supplied, and the turbine 59 is driven by this air. However,
Electric power is generated by the generator 61, and the air supplied into the partition wall 56 is exhausted to the outside through the exhaust hole 62. In addition, 63 is a safety valve of the air tank 49 provided in the exterior body 49, and 64 is a heavy object such as sand provided in an arc shape on the upper part of the fixed base 41 and between the exterior body 42 and the partition wall 46. Furthermore, this entire device is fixed on the foundation stone 65 on the seabed,
A foot protection block 66 is laid on the chestnut stones 65 located around the exterior body 42.

According to the above configuration, the air chambers 44 are arranged in a substantially arc shape in the wave traveling direction with the maximum wave height direction as the center,
In addition, the volume of the air chamber 44 is gradually reduced from the center in the direction of the highest number of waves. Therefore, each air chamber 44 can efficiently convert wave energy into air energy depending on the wave direction and wave height.

Furthermore, since the outer peripheral surface of the exterior body 42 of this device is cylindrical, waves can pass around to the sides. Therefore, the wave force that the exterior body 42 receives is smaller than the wave force that the exterior body 42 receives when the diameter of the exterior body 42 and the length of the aforementioned embankment body are equal. Moreover,
The fixed base 41 and the exterior body 42 are provided eccentrically, and the fixed base 41 is located behind the exterior body 42 in the direction of wave propagation. Therefore, it is possible to safely hold the entire device in the direction of the greatest wave energy, and it is also possible to reduce the cost required for stabilizing the device.

Furthermore, since the outer peripheral surface of the exterior body 42 is cylindrical, a wave-dissipating effect can be obtained when a large number of these devices are installed at predetermined intervals, and since there is no stagnation of seawater, there is no possibility of water pollution or affecting marine life. There is no.

In addition, various devices used for wave power conversion, such as a turbine 52, an air compressor 54, a main air turbine 59, and a generator 61, are installed on the fixed base 41. It can be installed reliably, has a robust structure, and is suitable for practical use.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and can be implemented with various modifications without departing from the gist thereof.

As detailed above, according to the present invention, it is possible to extract wave energy extremely efficiently in accordance with wave direction distribution, and to provide a multidirectional wave power conversion device that has extremely little impact on the marine environment. can.

[Brief explanation of drawings]

Fig. 1 is a diagram showing the correlation between wave height and wave direction at Port S, Fig. 2 is a schematic configuration diagram showing an example of a conventional embankment type wave power converter, and Figs. One embodiment of the directional wave force conversion device is shown, and FIG. 3 is a side sectional view, and FIG. 4 is a top sectional view of FIG. 3. 41... Fixed stand, 42... Exterior body, 44... Air chamber, 45... Opening, 49... Air tank, 52...
...reciprocating flow turbine.

Claims (1)

[Claims] 1. A fixed base formed in the shape of a column with a circular horizontal cross section and whose lower end is fixed to the seabed, and a fixed base formed in a circular horizontal cross section that covers the peripheral side of this fixed base and facing approximately in the direction of the most frequent waves with respect to the fixed base. An arcuate space formed between an eccentric exterior body and the fixing base with its lower end below the water surface, which is wide in the center and tapered at both ends, is approximately fan-shaped in cross section. a partition wall partitioned to form an air chamber and extending to the base surface of the fixing base; and an opening that guides wave force outside the side wall of the exterior body into the substantially sector-shaped air chamber;
an air tank provided on the fixed base and separated from the plurality of air chambers and communicated with outside air through an opening formed in an upper part of the exterior body; a device provided corresponding to each of the air chambers and driven by the air flow generated inside the air chamber to send outside air into the air tank, and a device provided inside the air tank to send the air flow sent by the device. 1. A multidirectional wave power conversion device comprising: a device for converting power into power;