JP3184512U - Hoisting wave power generator - Google Patents

Abstract

An uplifting wave power generation device that captures rising energy of a wave with a float and guides it to the seabed with a cable and converts it into electrical energy.
A float 1 floated on the sea surface, a cable 6 connected to the float and hanging downward from the float, a main bearing 7 fixed to a concrete base and changing the movement of the cable from a vertical direction to a horizontal direction, It is characterized by comprising a hydraulic device 11 for converting the horizontal movement of the cable into hydraulic pressure, and a generator 12 connected to the hydraulic device.
[Selection] Figure 2

Description

  The present invention relates to wave power generation that captures the rising energy of a wave with a float and converts it into electrical energy through a cable to the sea floor.

  Wave power generation is difficult and has been delayed in practical use because it is difficult to cope with drastic changes in the environment such as tide level fluctuations, wave height / wavelength fluctuations due to tidal fluctuations, and wind wave destructive forces due to typhoons.

  Yamaguchi University (Professor Hanedano) Tsurube-type wave power generator Hadano, P.M. Koirala, K .; Nakano and K.K. Ikegami: A refined model for float type energy conversion device, ISOPE 2007, pp. 421-427

  Direct drive wave power generation using a linear generator Uppsala Univ. M.M. Leijon et al. , Renewable Energy 31, 2006

Current major wave power generation is as follows: (1) Attenuation type that generates power by bending the movement of two Ukis indirectly on the water, and (2) Point absorption type that uses Uki's vertical motion with a horizontal pendulum (3) Pendulum wave power generation type with the pendulum upside down (4) Oscillating water column type that converts wave motion into air pressure (5) Overtopping type with impeller installed in drainage channel (6) From wave Submerged pressure differential type using the pressure change that is received The trouble that is easy to be affected by the six methods is water leakage, corrosion and destruction of facilities due to storm.

The present invention receives the fluid energy of unnecessary horizontal water, captures only the rising force, and leads to power generation.
In addition to placing a small disk-like float that is less susceptible to storms on the surface of the water, only the struts and cables in the water are passed through the fluid energy of horizontal wind and rain to minimize destruction.
In the unlikely event that a facility under water or water is destroyed due to driftwood, etc., a system will be available that can be repaired at a low cost and in a short time.

(Coastal / fixed / movable object type device, small-scale distributed type, with floating body sway reduction device) The characteristics of the lifting type wave power generation device are as follows.
(1) Wave energy existing in the ocean, where the water depth is shallow and the energy deep below the water surface is reflected by the sea floor and the wave power near the water surface is amplified. Installed at a distance of 1 m plus half the maximum wave height of 6 m.
(2) The concrete structure that forms the base of the strut that restricts the lateral movement of the base and the float (with skirt) that fixes the main bearing that changes the direction of the cable movement from vertical to horizontal and induces vertical movement Instead of building every one, it builds as a mega system and complements each other with the reaction forces necessary to capture the forces of waves that rush intermittently to the coast.
(3) The float has a disk shape that is not easily affected from the side, has a buoyancy that always faces the surface of the water, and has a weight that can be synchronized with the descent of the waves.
The fluid energy of the wave is mainly captured at the skirt, which is connected to the float and the strut, and is linked to the main cable by the kite.
(4) The energy captured by one system is not large. Build a mega system with a configuration that compensates for the intermittent nature of the waves, and accumulates continuous and large energy.
(5) Struts that limit the horizontal movement of the float are linked to the adjacent system via a repair scaffold. This increases the toughness of the struts.
Based on the above characteristics, a system that captures the kinetic energy of waves near the coast through the destructive power of storms is built with inexpensive parts and an easy-to-repair system to supply clean energy.

  It is the outline of the float and skirt which capture wave power.   It is an outline of the direction in which force works.

A float with a hexagonal outer edge skirt is connected to the column with slide bearings at various angles, and one side is linked to the next float through a repair scaffold. This is repeated several times to connect several floats.
Next to this, if a float connection that is shifted by half the diameter of the float is constructed by sharing a scaffold, each side will be shared.
If the same connection is constructed by shifting half the diameter of the float to the side, the floats in the middle row share 6 sides.
The extent of expansion depends on the wavelength of the wave to be supported. On the coast facing the Pacific Ocean, the minimum wave height is 1.5 m and the wavelength is about 3 m, but when it swells, the wave height is 6 m and the wavelength is about 20 m. This is close to the limit of the capacity of the system, but this is also the time when the maximum amount of power can be obtained. However, considering the loss that destroys the system, it is necessary to set the limit of response.

The wave force is received by the kite (float and skirt) and transmitted to the cable using the kite string. The transmitted force changes direction at the main bearing and is converted to hydraulic pressure. Convert from hydraulic pressure to rotary motion, adjust the speed with a mission and input the kinetic energy to the generator.
At this time, a certain degree of stretchability is given to the kite string to prevent the skirt from being damaged by the impact and to prevent the movement from being delayed by the wave drop.

The foundation is made of concrete, and the wave power of the lower layer is reflected without loss to enhance the energy capture of wave power generation, and the parts that do not affect the function of the system are made of seaweed-grown material, fish spawning, fry feeding・ Contribute to the expansion of marine resources by providing a role as an evacuation site from predators.
Increased underwater vegetation and sand accumulation are also expected due to a decrease in the force of waves hitting the coast, but if sand is collected regularly and used for reef creation, the catch will increase.

As a conservation measure, when the typhoon is evacuated, the float is designed to wind up the cloth-like part of the skirt, and when it exceeds the capacity of the system, it will not receive wind waves.
In addition, we will take protective measures that will not destroy the facilities due to driftwood, etc., but we will create a system that allows parts to be replaced quickly and inexpensively even if the superstructure is destroyed.
According to statistics, a wave with a wave height of 1.5 times is pushed once every 15 minutes due to interference, and a wave with a wave height of twice as high comes once every two hours.
Those who are involved in the repair must be aware of this fact and have acquired the ability to avoid being attacked by high waves unexpectedly, and must be capable of avoiding the damage of high waves by using scaffolding fences.

DESCRIPTION OF SYMBOLS 1 Float 2 Rib 3 Thread 4 Skirt 5 Strut 6 Cable 7 Main bearing 8 Slide bearing 9 Scaffolding 10 Concrete base 11 Hydraulic device 12 Generator

Claims (1)

  The float floats on the sea surface, and the rising energy of the waves converges on the cable attached to it. The bearings installed on the seabed guide the upward movement to the horizontal force of the cable and convert it into electrical energy.

Images