RU2559212C1 - Method of sea waves use for electric power generation - Google Patents

Abstract

FIELD: electricity.

SUBSTANCE: concentration of wave front is performed due to water passage through set of tanks connected in series and communicating with each other by check valves. The tanks are located along the sea waves movement. Liquid is accumulated in water pressure tank in form of the water column. Further the water column is used to drive the rotor of the generator generating electric current. Water additionally passes inside the tanks when wave crests pass above them via the check valves located on upper part of the tank, increasing pressure inside the next tank and facilitating movement of the water head towards water tower.

EFFECT: increased efficiency, universality and simple design.

4 dwg

Description

The invention relates to the field of renewable energy, namely, the conversion of wave energy of open water into electricity.

A known method of generating electricity based on the use of sea wave energy is that the wave front is concentrated by means of a guide platform mounted on a concrete base, then sea surface vibrations transmit a float connected through a two-arm lever, which drives the generator rotor through a mechanical drive, generating electric current (see RU 2316670 C1, 04/03/2003).

The disadvantage of this method is that due to the presence of a mechanical drive in the system, an element of unreliability is formed, which increases the likelihood of system failures under certain circumstances.

There is a method of generating electricity using the energy of sea waves due to the resulting vertical rises and falls of water affecting the wave power station, using a lever connected at one end to the gear system via a one-way rotation mechanism, and the other with a cylindrical float (see RU 2443900 C1 02/27/2012).

Its disadvantage is that due to the presence of a mechanical drive, an unreliability element is formed in the system.

As a prototype, the method of using sea waves to produce electricity was selected, which consists in the concentration of the wave front by passing water through a set of tanks connected in series and connected to each other through check valves along the wave direction, with the accumulation of liquid in the water tank in the form of a water column, followed by the use of a water column to drive the rotor of an electric generator generating electric current (see RU 90496 U1, 01/10/2010).

Its disadvantage is that it is ineffective in operation and difficult to perform.

The objective of the invention is to provide a device for generating electricity from the use of sea wave energy, allowing the most complete use of wave energy, as well as reducing operating and capital costs when implementing this method.

The technical result is to increase the efficiency of installations made by this method, increase their versatility and simplify the design.

The technical result is achieved due to the fact that in the method of using sea waves to obtain electricity, which consists in the concentration of the wave front due to the passage of water through a set of tanks connected in series and connected to each other through check valves in the direction of travel of the waves, with the accumulation of liquid in a water tank in the form of a water column, followed by the use of a water column to drive the rotor of an electric generator generating electric power sky current, according to the invention the water is passed further into the containers while passing over them wave crests through check valves arranged in the upper part of the vessel, raising the pressure within the vessel and stimulating the next movement of these water jets towards the water vessel.

The invention is illustrated in FIG. 1-4.

In FIG. 1 shows a separate container.

In FIG. 2 shows a single container in a three-dimensional image.

In FIG. 3 drawn a set of series-connected containers.

FIG. 4 shows the complete installation assembly.

Devices illustrating the proposed method of using sea waves to generate electricity are arranged as follows. A set of several series-connected containers made in the form of rectangular oblong boxes 1, with check valves 2 and 3 in the upper and front parts, respectively, is shown in (Fig. 1, 2). The check valves have a common cylindrical hinge 4, on which the check valves check valves 2 and 3 are rotated. The rotation of the check valves is limited by the top and front surfaces of the drawer 1, respectively. The rear wall 5 is open for movement of water. The figures also show: water level 6 in a calm state, 7 - sea wave.

A set consisting of several series-connected and interconnected containers in the form of boxes 1a, 1b, 1c, 1d, 1e, etc., is located along the direction of the waves (in the direction of the arrow) (Fig. 3). In FIG. 3 also shows the corresponding check valves 2a, 2b, 2c, 2d, 2e, 3a, 3b, 3c, 3d, 3e. The total length of the tanks is approximately equal to the average sea wave length characteristic of a given coastal strip. All non-return valves allow water to enter the tanks and do not let it out.

The last container in the form of a box 1d in FIG. 4 contains a check valve 8 adjacent to the lower intermediate water column 9, at the top of which a check valve 10 is also installed. This valve is located between the water column 9 and the above water column 11. At the top of the upper water column there is a check valve 12 , which separates the column 11 from the water tank 13. All non-return valves pass water towards the tank 13 and do not allow the reverse movement of water. At the outlet of the tank 13 there is a receiving tube 14, which leads to the hydroelectric generator 15. After the hydroelectric generator 15, water flows through the drain pipe 16.

Serially connected and interconnected containers in the form of boxes 1a, 1b, 1c, 1d, 1e, etc. installed so that they remain under water at the minimum sea level characteristic of this coastal zone, and must be constantly covered by water.

The method of using sea waves to generate electricity is as follows. When the wave crest passes over the first container in the form of a box 1 (Fig. 1, 2, 3, 4,), pressure increases above it, and the check valve 2 rotates on the hinge 4 towards the inside of the container, increasing the pressure in it. This pressure propagates through all the check valves 3 in the direction of the water tank 13. With further movement of the wave crest, the corresponding check valves are activated, passing the increased pressure inside the next tank and stimulating the movement of the water pressure towards the tank 13.

As you know, the wavelength "λ" on average ranges from λ = 51m ÷ 195 m. The speed "C" of the wave crest is determined by the formula:

$$C=\sqrt{\frac{\mathrm{<figure-callout\; id="2"\; label="g\; \lambda "\; filenames="00000003.png"\; state="\{\{state\}\}">g\; </figure-callout>}\lambda }{2\pi }},$$

where g is the acceleration of gravity.

The kinetic energy of the wave W, the containers moving along in the form of boxes 1a, 1b, 1c, 1d, 1e, etc., which is determined according to the equation W = mc ^2/2 is converted into potential energy P _h of water, filling a water tank 13. This potential energy can be determined according to the formula P _h = mg (h ₂ -h ₁ ), where h ₁ is the water level in containers in the form of boxes 1a, 1b, 1c, 1d, 1e, etc., h ₂ is the water level in water tank 13, m is the mass of water moving along the tanks. Equating these two equations, we obtain: P _h = W; (h ₁ -h ₂ ) = C ² / 2g.

For the minimum wavelength equal to λ = 51, and accordingly the minimum speed of 8.9 m / s of its movement, we obtain h ₁ -h ₂ ≈ 4 m. For longer waves, the difference in levels increases, reaching 15.5 m, with a length waves of 195 m.

The advantages of this method of generating wave energy are that it allows to increase the utilization of energy of sea waves, to simplify the design of devices made by this method, and to reduce operating and capital costs. The devices used to implement this method are simple to manufacture and do not require high precision. The power generated by the generator depends on the volume of capacities. Such devices are conveniently placed in the coastal zone to power the nearest buildings.

Claims (1)

The method of using sea waves to generate electricity, which consists in the concentration of the wave front by passing water through a set of tanks connected in series and connected to each other through check valves in the direction of travel of the waves, with the accumulation of liquid in the water tank in the form of a water column , followed by the use of a water column to drive the rotor of an electric generator that generates an electric current, characterized in that the water is additionally OSCAL inside containers during the passage of wave crests on them through check valves arranged in the upper part of the vessel, raising the pressure within the vessel and stimulating the next movement of these water jets towards the water vessel.

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