Wave power plant

 

(57) Abstract:

Usage: in the hydropower industry. The essence of the invention: on the bottom of the reservoir has a cylindrical tank provided in the lower part of the reservoir. Float cover with buoyancy compartments formed with a reservoir cavity, connected by a channel and slot in the Central part of the cover to the air turbine. An electric generator coupled to the turbine. In the upper part of the wall of the open bottom of the generator was formed on top of the ring cavity. Cover is made in the form of two coaxial cylinders, rigidly interconnected at the top. The inner cylinder provided with a bottom. The compartments are connected with the outer cylinder and placed so that they can move in the annular cavity. The compartments are made with a constant buoyancy. The side walls of the annular cavity at the level of the undisturbed surface of the water holes. The total area of the holes of the inner wall is smaller than the total area of the holes of the outer wall. 3 C. p. F.-ly, 4 Il.

The invention relates to hydropower, in particular to devices for the energy of the wave motion.

A device for converting wave motion is present to a narrow exit, the pressure chamber associated with the specified output, in which a standing wave can be transformed into a large wave, where pneumatic compression and suction turbine dual action for disposal of pneumatic pressure compression and suction.

A disadvantage of this device is stationary mounting the camera on the shore, causing the volume of the air chamber varies with changes in the amplitude of excitement and tidal sea level fluctuations. This reduces the efficiency of energy conversion of the waves.

It is also known a device in which a chamber with an open bottom end set at sea on the hard ground. The water column in the chamber, performing oscillatory motion, sucks and pushes the air through the hole in the lid of the chamber to the turbine, installed in the channel that communicates with a hole, the length of the immersed part of the cell is chosen from the conditions of resonance oscillations of the water column in the chamber.

A disadvantage of this device is unregulated airspace. For large amplitude waves, the water will get into the channel with an air turbine, if the height of the bottom of the camera will correspond to the maximum look turbine operates in a non-optimal mode, wave energy is used with low efficiency.

The closest in technical essence is the device to use the energy of the tides. The device contains mounted on the bottom of the reservoir tank with a floating lid, reported in the lower part by a shut-off valve to the reservoir, and the cover has compartments with adjustable buoyancy located around the tank and has a shutoff valve. Before the tide cover is lowered in the tank increases the air pressure, which turns a turbine. If you increase the height of the tide the air when you open the valve forces in the turbine by increasing the water level in the tank. Before the end of tide water from the compartments is pumped out, the cover rises in the tank vacuum is formed of the air entering the tank, rotate the turbine. When reducing the height of the tide turbine operation is achieved by lowering the water level in the tank.

A disadvantage of this device is that the pumping of water from compartment cover required costs of energy, it consumes energy gain obtained when filling the compartments and lowering of the cover. In addition, when the water level rises sleep the level of the water, this process is without a win energy. And when lowering the water level continuously to pump out the water from the compartments of the cover so that the cover did not fall, and this consumes power.

The basis of the invention is setup in such a way as not to expend energy on pumping water from the compartments of the float cover and ultimately, at different amplitudes of excitement, to provide an air turbine mounted in the lid, at the optimum pressure drops.

The problem is solved in that in the wave energy device containing a mounted on the bottom of the reservoir cylindrical tank provided in the lower part of the reservoir, and a float cover with buoyancy compartments, forming with the reservoir cavity, connected to the air turbine through the channel and the holes drilled in the Central part of the cover, a turbine connected to a generator, the tank is open at the bottom, in the upper part of its walls formed by the open top of the annular cavity, and the cover is made in the form of two coaxial cylinders, rigidly interconnected at the top, and the compartments are connected with the outer cylinder, made with a constant buoyancy and placed in the surface water holes, moreover, the total area of the holes of the inner wall is smaller than the total area of the holes of the outer wall. The bottom of the inner cylinder cover is installed directly above the undisturbed water surface. In addition, the holes of the outer wall installed shut-off non-return valve that opens inside the ring cavity, and in the holes of the inner wall installed shut-off adjustable valve connected to the pressure sensors, placed on the inner wall.

The proposed device differs from the prototype in that the installation is supplied by a generator connected to an air turbine, the tank is open at the bottom, in the upper part of its walls formed by the open top of the annular cavity, the inner and the outer wall of which is a hole at the level of the undisturbed surface of the water, and the total area of the holes of the inner wall is smaller than the total area of the outer wall. In the holes of the outer wall installed shut-off non-return valve opening inside the ring cavity, and in the holes of the inner wall installed shut-off adjustable valve connected to the pressure sensors on the inner wall. Also in contrast to about the second cylinder provided with a bottom, and permanent buoyancy compartments are connected with the outer cylinder and placed so that they can move in the annular cavity. The bottom float cap is installed directly above the undisturbed water surface.

These characteristics distinguish the claimed device from the prototype and are new, as it is not known from the prior art.

Running the tank with a cavity in which is placed a float cover, consisting of two coaxial cylinders, determines when using the claimed solution positive effect, consisting in the fact that adjustment of the float cover with an air turbine does not require additional energy costs.

At different amplitudes of excitement, there is no need to pump water out of the compartment cover, as a result, this work will not consume energy, therefore, increases the efficiency of energy conversion. In addition, the placement of holes with valves with pressure sensors in the external and the internal wall of the tank at the level of the undisturbed sea surface also contributes to the achievement of a technical result.

The comparison of the proposed solutions not only FR retailstore level.

In Fig. 1 shows a diagram of the installation with the undisturbed sea surface; Fig. 2 is the same, with the passage of the crest of the wave of Fig. 3 is the same, with the passage of the trough of Fig. 4 diagrams of wave setup:

(a) schedule of changes in sea level about installation,

b) elevation plot covers,

C) sea level change in the cavity,

g) changing the air pressure in the tank.

Wave power plant comprises a cylindrical tank 1 and the float cover 2. Float cover 2 consists of two coaxial outer cylinder 3 with permanent buoyancy compartments 4 and 5 internal rigidly interconnected at their upper part. The inner cylinder 5 has a bottom 6, the center of which a hole is set to channel 7. Air 8 turbine with the generator placed in the channel 7. The tank 1 is made in the upper part of the double walled, outer 9 and 10 internal forming a cylindrical cavity 11 is filled with water. The outer cylinder 3 with 4 compartments permanent buoyancy placed in the cavity 11 of the tank can move. The cavity 11 of the tank is communicated with the reservoir from the outside through openings that have non-return shut-off valves 12,13, each of the latter is connected to the pressure sensors 14 arranged on the circumference of the tank at the level of the undisturbed sea surface. The total area of the holes 13 is much less than the total area of the holes 12. The tank 1 is installed on supports 15 on the bottom of the sea and opened from below.

In Fig. 4 additionally marked: Hothe amplitude of the wave; Hkrcover height above the level of the undisturbed sea surface; Raboutatmospheric pressure; P is the air pressure in the chamber; time.

Wave power plant works as follows.

In the absence of agitation, the water level inside the tank 1 in the cavity 11 and outside installation same. Float cover 2 floats in water, enclosed in the cavity 11 between the walls 9 and 10 of the tank 1. The bottom of the inner cylinder 5 is directly above the surface of the water inside the tank 1 (Fig. 1).

When the sea is rough in the tank 1 there are fluctuations in the water column, which causes a periodic variation in pressure of the air located between the surface of the water over the water column and the bottom 6 of the float cover 2, which is used for air flow in the channel 7 to provide Brasi wave crest (Fig. 2), (point1, Fig. 4) water enters the cavity 11 between the walls 9 and 10 of the tank 1 through the openings with valves 12, 13. Water in the cavity 11 rises to a height corresponding to the amplitude of the wave. Float cover 2 when it rises (point 2Fig. 4). When the recession wave (Fig. 3) when the water level on the outside of the wall 9 of the tank 1 below the water level in the cavity 11, the valves 12 are closed automatically. The valves 13 are closed from the pressure sensors 14, when the pressure in the tank becomes equal to atmospheric pressure (point2I,1, Fig. 4). The water level in the tank 1 falls, while atmospheric air enters the tank 1 through the channel 7, rotating the turbine 8 with generator. Due to the underpressure in the tank 1 cap 2 protoplanets. When it reaches the minimum water level in the tank (point3,5Fig. 4) the air pressure P in the tank begins to grow. Cover 2 POPs up, compensating for the reduction of depression. When the pressure P becomes equal to atmospheric Pabout(point3IFig. 4), the valve 13 is opened from the pressure sensor 14. Water starts to come out of the cavity 11. Cover 2 slowly begins to fall, increasing the air pressure in the tank 1 in addition to increasing the 7, powering the turbine 8 with generator. When the water level outside the unit will be above the water level in the cavity (point6, 4I, Fig. 4), opens the valve 12 and the water enters the cavity 11. When reaching the maximum wave pressure in the tank falls (point7), the cover is lowered, partially compensate for this pressure drop. If the amplitude of the wave decreases, with the passage of the wave crest water inside the cavity 11 of the act will not. Water in the cavity 11 is lowered to a level corresponding to the amplitude of the wave, and accordingly to that level will drop and the bottom 6 of the lid 2. By increasing the amplitude of the wave, the bottom 6 of the lid 2 is raised to the level corresponding to the amplitude of the wave due to ingress of water into the cavity 11 through a large total area of cross sections of the holes 12 and 13. Thus, the height of the bottom 6 of the lid 2 is supported at the level of the average amplitude of the wave.

The proposed installation has the following advantages compared with the prototype. To regulate the position of the bottom of the cover is not consumed energy. The bottom of the cover is installed and supported on a height near the average amplitude of the wave, and does not move together with changes in the level of the waves, as in the prototype, this allows the most is in the tank with a closed hole

P1= Powhere Raboutthe initial pressure in the chamber; Hkrthe length of the level is not perturbed water surface to the bottom cover; Haboutthe amplitude of the wave. It is seen that the pressure is greater, the closer the value of Naboutto Hkr. Conversely, the negative pressure in the tank

P2= PoIts value is the smaller, the closer the value of Naboutto Hkr. In addition, if with a slight rise in water level in the chamber remains free of air volume, the lost energy is equal to

E RpS(HkrHabout), where Raboutthe working pressure in the chamber; and S the cross-sectional area in the chamber; P1the air pressure in the chamber when the water level rises; P2- air pressure when the water level dropped.

The invention of the wave power installation is industrially applicable, as it can be used for energy in the coastal zone of seas for energy saving remote communities, offshore and onshore industries, Autonomous objects in the sea. The use of wave energy will cover a significant part of the energy needs of consumers, to save fuel. The average flow of the wave of renewable energy is what you get when you use energy in the coastal zone up to 5 kW per 1 m of wave front, i.e. up to 500 kW at 100 m

A technical advantage of the wave power plant is the ability to set the bottom of the float chamber at a height corresponding to the average amplitude of excitement sea level, i.e., the regulation of the air volume of the chamber without additional energy costs and thereby increasing the efficiency of energy conversion of the waves.

Work for time compression in the first approximation is equal to

A Pp(Ho-h)S PH1 - ho< / BR>
where Rpoptimum operating pressure for the pneumatic turbine; and S the cross-sectional area of the tank; (h change of water level in the chamber is required to reach the working pressure difference, hoHkrHaboutthe distance from the cap to the surface of the water at the maximum level rise.

Work for a time extension equal to

A PpSHo-ho< / BR>
From these expressions it is seen that the larger the value of hothe distance from the bottom of the camera to the maximum water level in the chamber, the less useful work.

For example, if unregulated Luggage designed for a wave height of 4 m, and the excitement is 2 m, then at an operating pressure of 0.1 ATM loss will be 10% For air Katia 180-200 kW (1,82-2 kW/m2) [5] Japanese station "CIMA" has a specific power of 2.7 kW/m2when the wave height of 3 m Thus, the loss due to inefficient operation of the plant is about 20 kW.

1. The WAVE POWER INSTALLATION comprising mounted on the bottom of the reservoir cylindrical tank provided in the lower part of the reservoir, and a float cover with buoyancy compartments, forming with the reservoir cavity, connected to the air turbine through the channel and the holes drilled in the Central part of the lid, characterized in that it is provided with an electric generator connected to an air turbine, the tank is open at the bottom, in the upper part of its walls formed by the open top of the annular cavity, and the cover is made in the form of two coaxial cylinders, rigidly interconnected at the upper part, the inner cylinder provided with a bottom, and the compartments are connected with the outer cylinder and placed so that they can move in the annular cavity, with compartments made with constant buoyancy, and the side walls of the annular cavity at the level of the undisturbed surface of the water holes and the total area of the holes of the inner wall is smaller than the total area of the holes of the outer wall.

3. Installation under item 1, characterized in that the holes of the outer wall installed shut-off non-return valve opening inside the ring cavity.

4. Installation under item 1, characterized in that the holes of the inner wall installed shut-off adjustable valves, the latter is connected to the pressure sensors, placed on the inner wall.

 

Same patents:

The invention relates to power engineering and can be used in devices for converting the energy of sea waves into electricity

Wave power plant // 2043535

Wave power plant // 2025573

Wave power plant // 2018706

Tidal hydroelectric // 2009367

Wave power plant // 2004843

FIELD: power engineering.

SUBSTANCE: invention is designed for conversion of wave energy into electric energy. Proposed converter contains mechanically coupled fixed post, float chambers, frame, shaft, step-up gear and electric generator. Moreover, converter additionally contains relatively interacting second shaft, first and second gears and at least two motion converters. First and second gears are fixed on corresponding shafts and engage with each other. Each motion converter has vertical rod installed for vertical vibration on upper end of which first block is installed, and on lower end, third sprocket engaging with first and second float chambers. First and second overrunning clutches with sprockets are installed on shafts and they engage through first and second chains with third sprocket.

EFFECT: increased efficiency.

8 cl, 7 dwg

Wave power plant // 2316670

FIELD: power engineering.

SUBSTANCE: proposed plant is designed for converting energy of waves into electric energy. Proposed plant contains vertical support secured on bottom, rocking rod installed on support for rotation around axis of support, float secured on one of rod ends. Float is provided with intake bottom hole and outlet top hole, both provided with remote controlled valves, and electric generator. Upper end of support remains under water at any possible magnitudes of waves. Wave magnitude sensor is connected with remote controlled valves, float is connected to pneumatic line connected with pressure source, rocking rod is connected with pump which is connected by pipeline with accumulator of hydropotential energy on shore, electric generator is located on shore and is coupled with hydraulic turbine connected with accumulator of hydropotential energy. Plant changes to safe mode of operation owing to filling of float with water at excess of magnitudes waves determined by corresponding wave magnitude sensor.

EFFECT: provision of reliable and long operation.

9 cl, 3 dwg

FIELD: engines and pumps.

SUBSTANCE: device exploiting the wave energy incorporates a support with openings for water overflowing and a frame furnished with storm pumps, the extreme of which, incorporating discharge valves, communicate via a pipe with a receiver and curvilinear deflector connected to the pumps rods, the deflector being made in the form of a float with its concave surface facing the incoming wave, a balancer arranged opposite to deflector on the frame mounted to rotate about a horizontal axis laying between the balancer and deflector and a working pump fitted on the support with its rod coupled via transfer mechanism with the frame. The support front incorporates a wave killer made in the form of a prism, its apex directed towards the wave, and arranged to vertically move on along the support. The wave killer height makes half the height of the support. The medium storm pump has a branch pipe communicating via the pipe with the receiver and used a the deflector pusher. Storm pumps incorporate openings allowing the piston back free stroke.

EFFECT: simpler design and higher reliability.

1 dwg

FIELD: engineering industry.

SUBSTANCE: device can be used in water power engineering. Closed floating casing is installed on supports so that it can rotate. To inner surface of the casing attached are solenoids wherein located are ferromagnetic pins. Rod is located inside the casing and is connected with ferromagnetic pins. Casing's rotation axis is located at an angle to rod axis. Rod is installed on rollers and spring-loaded on both ends. Casing is equipped with current-collecting elements and vane propeller.

EFFECT: providing the specified value of travel and uniform speed of movement of ferromagnetic pins in solenoids at various wave amplitudes using wave advance energy.

2 dwg

Wave power plant // 2345244

FIELD: engines and pumps.

SUBSTANCE: invention is related to hydraulic engineering. Wave power plant comprises body placed on supports, solenoids fixed inside body and ferromagnetic rods installed in solenoids. Body is installed on shaft with the possibility of rotation. External surface of body is arranged as circular-cylindrical with blades in the form of double-threaded Archimedean screw and is equipped with current-collecting elements. Solenoids are arranged as annular, are oriented and fixed in planes that are perpendicular to shaft longitudinal axis. Ferromagnetic rods are arranged in the form of tore and are equipped with rollers. Length of body is accepted as equal to at least half of wave length.

EFFECT: provision of electric power generation stability.

2 dwg

FIELD: engines and pumps.

SUBSTANCE: invention is related to float pump units in power systems based on float pumps, in which water motion is used for transportation of gas, liquid and their combinations from one place to another. Float pump comprises float having controlled volume, which is arranged with the possibility of return displacement under effect of waves, piston installed with the possibility of sliding inside piston cylinder and connected to float. Piston is arranged with the possibility of return displacement in the first direction and second direction under effect of float motion. Piston moves in the second direction for suction of working fluid medium into piston cylinder and moves in the first direction for removal of working medium from piston cylinder.

EFFECT: creation of environmentally safe, highly efficient, low cost devices for power generation.

27 cl, 30 dwg, 4 tbl

FIELD: power industry.

SUBSTANCE: wave electric power station intended for being installed on or in the sea or lake, for power generation includes floating construction and at least one floating body 1 which is moved vertically in relation to floating construction and is connected to the aforesaid construction through power transmission device. Floating construction includes a deck which is supported in fact with vertical supports. Supports have a pontoon functioning as damper and adapted for being arranged below water level. Deck, supports and pontoon comprise the space within which floating body 1 or bodies are located. In fact, pontoons have square section with oblique angles and with width which is more than height so that the floating construction is essentially fixed relative to still water level.

EFFECT: increasing output energy of wave electric power station.

17 cl, 17 dwg

FIELD: power engineering.

SUBSTANCE: wave power plant comprises vessel with electric generator installed in it, rotor connected to the latter with vertical axis of rotation, with horizontal blades. Between the latter vertical blades are installed with serial alternation of vertical and horizontal ones. Blades are installed in plane of undisturbed surface of water so that the latter is plane of symmetry for them.

EFFECT: increased efficiency of wave power plant operation by increase of share of wave kinetic energy transformed by plant into mechanical energy of rotary shaft.

4 dwg

FIELD: electricity.

SUBSTANCE: system includes a number of generator units (4a-6c) located in sea and a number of switchgear (1a-1c) located in sea. Each switchgear (1a-1c) is connected with a number of generator units (4a-6c). According to the invention, the system comprises a number of primary intermediate stations (17a-17c). It also includes at least one secondary intermediate station (19). Each primary intermediate station (17a-17c) is linked with a number of switchgears, and each secondary intermediate station (19) is connected with a number of primary intermediate stations (17a-17c). In addition, the secondary intermediate station is connected with on-land electrical network. The switching device (192) is available to ensure connection with different locations (193, 194, 195) of electrical network.

EFFECT: creation of system which is technically and economically compatible for supplying power to common electrical network.

28 cl, 6 dwg

FIELD: electricity.

SUBSTANCE: wave electric station contains operating sections each represented as hollow straight four-sided V blocks, in cross section and in the form of rectangular. It is open from the bottom and linked with water medium. The above sections are installed lengthwise closely to each other. There are two open-end longitudinal windows in the top part of V-block, which form intake and pressure main lines and rectangular windows. The sections are located between vertical boards hung butt-to-butt inside two parallel lines punched into pile bottom.

EFFECT: increased power output from plant and simplified design.

3 cl, 9 dwg

Up!