Tidal power plant

 

(57) Abstract:

Usage: to hydropower, particularly in tidal and wave power plants. The inventive system includes a vertical hollow cylinder 1, a reservoir 2 for compressed air, a turbine 3, a piston 4 connected to the float 5. The piston 4 forms the inside of the cylinder 1 air chamber high pressure 6 and 7. And to them are attached the buffer chambers 8 and 9 with spring-loaded pistons 10 and 11. Camera 6 and 7 are connected with the atmosphere through the inlet 12, through pipelines, provided with valves 13 and 14. The pistons 10 and 11 are biased by springs 15. Air chambers 6 and 7 of high pressure is connected to the tank 2 compressed air through pipes 16 and 17, provided with valves 18 and 19. Each buffer chamber is equipped with a device 20 for adjusting the tension of the spring 15. Cylinder 1 tidal energy plants are located on the ground 21. 1 C.p. f-crystals, 1 Il.

The invention relates to hydropower and can be used in tidal power plants and wave power plants.

It is known device [1] to use the energy of the tides, containing mounted on decresce equipped with compartments with adjustable buoyancy, located around the tank and having shut-off valves and pumps. The device also includes an air turbine and shut-off valves for switching the flow of air.

The disadvantages of this device are: irregular mode of operation of the turbine, low pressure air supplied to the turbine, the need for energy costs for pumping. This reduces the energy conversion efficiency of tides or waves.

The closest technical purpose is tidal power plant [2] the apparatus consists of a vertical cylinder mounted on the seabed, float tank for compressed air, turbine and connecting pipelines. Inside the cylinder is a piston, above and below which are air chamber high pressure. The piston via a piston rod connected to the float on the surface of the sea. When sea level rises, the float lifts the piston, and the compressed air flows from the upper chamber into the tank and next to the turbines. While reducing the air is displaced from the lower chamber and through the tank is fed to the turbines.

The disadvantage of this setup is that because of a change in the differential pressure between Ki. This is because the pressure in the tank, which is a battery of compressed air to the turbine, is kept constant or varies in a small range, and the pressure in the compression chambers (chambers of increased pressure may be significantly higher. Therefore, the gas flow from the compression chambers into the reservoir-battery choked, resulting in energy losses [3] [4] as a result the efficiency of the gas decreases, and decreases its useful work in an air turbine. At high differential pressure between the compression chamber and the tank lost part of the internal energy of the gas when the throttle is in the tank. The pressure difference in the main working cylinder and the reservoir exists in the installation because the pressure in the tank-the battery should be approximately constant and it is somewhat lower than the pressure of compressed air in the working cylinder. And when the pressure in the compression chamber below the pressure in the tank is lost the rest of compressed air.

The basis to solve the task of ensuring a stable and uniform operation of the air turbine by reducing the pressure difference between the compression chamber and the reservoir.

Set for the hydrated hollow cylinder with piston, above and below which is formed an air chamber high pressure connected to the inlet, a float connected with the piston via a piston rod, a reservoir for compressed air, a turbine and connecting lines, the upper and lower air chambers high pressure cylinder equipped with a buffer cameras placed outside the cylinder and connected with it through channels, and the channel of the upper buffer chamber placed in the space between the cylinder head and the upper extreme position of the piston, and the channel of the lower buffer chamber placed in the space between the bottom of the cylinder and the lower extreme position of the piston.

In each of the buffer chamber has a piston that is spring-loaded in the direction of the channel.

The proposed device differs from the prototype in that each air chamber high pressure vertical hollow cylinder provided with a buffer chamber which is connected through a channel with a cylinder. With each buffer chamber has a piston that is spring-loaded in the direction of the channel connecting the cylinder with the buffer chamber and having a sealing ring.

More supply chambers high pressure buffer chambers with spring-loaded Porsche is the position of the float and to maintain uniform mode of operation of the turbine.

This set of essential features of the claimed invention has novelty and has a causal relationship with achievable technical result. Namely, the uniformity of operation of the air turbine, reducing energy loss (and health) of air when the throttle on the way from the compression chambers to the reservoir, the increase in the length of the turbine due to the presence of buffer chambers, storing energy, and thereby increases the efficiency of the installation as a whole.

The invention is illustrated in the drawing, which shows schematically the tidal power plant. Tidal power plant comprises: a vertical hollow cylinder 1, a reservoir 2 for compressed air, a turbine 3, a piston 4 connected to the float 5. The piston 4 forms the inside of the cylinder 1 air chamber high pressure 6 and 7, and to them are attached the buffer chambers 8 and 9 with spring-loaded pistons 10 and 11. Camera 6 and 7 are connected with the atmosphere through the inlet 12, through pipelines, provided with valves 13 and 14. The pistons 10 and 11 are biased by springs 15. Air chambers 6 and 7 of high pressure is connected to the tank 2 compressed air through pipes 16 and 17, snabzheniju 1 tidal energy plants are located on the ground 21.

Tidal power plant works as follows.

When the water level rises (at high tide) float 5 raises the piston 4 and compresses the air in the air chamber 6 of the cylinder 1, and the free piston 10 moves in the buffer chamber 8 and compresses it in the air and the spring 15. Thus, in the buffer chamber 8 is stored energy in the form of the energy of compressed air, and energy of the compressed spring 15. The valve 19 is open to the pipe 17, valve 18 and the pipe 16 is closed. Air enters the tank of compressed air 2, and thence to the turbine 3. In the chamber 7, a vacuum, so in the buffer chamber 9, the piston 15 moves to the right, creating in the chamber 9 also depression. Due to the vacuum in the chamber high pressure 7 opens the valve 14, valve 13 is closed. The air from the air intake 12 through valve 14 into the chamber 7. When the height of tide is approaching the maximum speed of the piston 4 is reduced to zero, the pressure in the chamber 6 begins to decrease. When the pressure in the buffer chamber 8, the folding of the compressed air pressure on the piston and the pressure on the piston of a spring 15 becomes greater than the pressure on the piston side chamber 6, the compressed air in the buffer chamber 8 extends, that is the ameres 8 with the piston 10 and the spring 15 and the movement of the piston 10 first left, and then to the right provides the following, the movement of the piston 10 to the left eliminates the possibility of increasing the air pressure in the chamber 6, which is substantially higher pressure than the tank 2. Thus, it is possible to eliminate the loss on the throttle when the flow of air from the chamber 6 into the tank 2. However, the energy of the compressed air working piston 4 in the chamber 6 is not necessarily lost, and stored, as described above, by using the buffer chamber 8 with the piston and spring. At the same time, when reaching the working piston 4 to its extreme upper position, its movement is slowed down, and the work of compression is therefore reduced. During this period, when the piston 10 to the right is ensured by the return of energy stored in the buffer chamber 8 of the air in the chamber 6, which flows into the tank 2 and extends the work of the turbine 3 at an operating pressure of air in tank 2.

At the beginning of the outflow valves 14 and 19 are closed. The piston 4 descends due to the lowering of the float 5, together with sea level. The air pressure in the chamber 7 increases, when it becomes higher than the pressure in the tank 2 opens the valve 18, whereupon air enters the tank 2. In the chamber 6, a vacuum opens the valve 13 and through the inlet 12 and the air post the least 8 piston moves to the right, the air expands. The spring 15 is adjusted so that, for example, when the motion of the piston 4 downward pressure of the air in the chamber 7 is increased, the piston 11 is restrained by the spring 15 in the same position until the pressure in the chamber 7 becomes equal to (or slightly larger) to the pressure in the tank 2. From this point, a small increase of pressure in the chamber 7 causes: first, the flow of compressed air into the tank, and, secondly, to move the piston 11 to the left that leads to the spring compression and compression of air in the cavity of the buffer chamber 9 to the left of the piston. Thus, upon further movement of the piston 4 down the compressed air flows into the tank 2 at a small pressure difference in the chamber 7 and the reservoir, which corresponds to the minimum throttling losses. When the piston 4 to its lower position, speed it slows down (to zero), and for some time the piston is in the down position. This is due to the characteristics of the fluctuations of the sea level at high tide and ebb. During this period the energy is released in the buffer chamber 9, as m previously in the chamber 8 when the piston 11 moves to the right, it compresses the air in the chamber 9 and pump it into the tank 2. The device 20 allows you to adjust the tension of the mounting has the following advantages compared with the prototype. Due to the presence of the buffer chambers is smoothing the peaks of the pressure in the chamber increased pressure. The flow of air in the tank for the compressed air will be carried out in a mode closer to equilibrium. Reduced losses by throttling the air. Increases the duration of operation of the air turbine when the pressure in the tank of compressed air. Increases the amount of useful work installation. This increases the efficiency of tidal power plant.

The sources of information.

1. A. S. N 1341372, MKI F 03 B 13/12, "Device for the energy of the tides".

2. Application DE 3720872AI Germany, MCI, F 03 B 13 /26 N P 3720872.1; Appl. 24.06.87; published. 05.01.89,

3. Kirillin Century A. Sychev Century Century sandlin A. E. Technical thermodynamics. Ed. 4th. M. Energoatomizdat, 1983, pp. 203-212.

4. Bakhmetevsky B. I. Zech.R. G. Lazo, P. and other heating equipment. M GNOTICISM, 1963, pp. 144-162.

1. Tidal energy installation comprising a fortified on the seabed vertical hollow cylinder with piston, above and below which the cylinder is formed an air chamber high pressure connected to the inlet, a float associated with the piston at the upper and lower air chambers high pressure cylinder equipped with a buffer chambers, placed outside the cylinder and connected with it through channels, and the channel of the upper buffer chamber placed in the space between the cylinder head and the upper extreme position of the piston, and the channel of the lower buffer chamber placed in the space between the bottom of the cylinder and the lower extreme position of the piston.

2. Installation under item 1, characterized in that each of the buffer chamber has a piston that is spring-loaded in the direction of the channel.

 

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