KR101202945B1 - Apparatus for storing air pressure energy by using hydraulic pressure - Google Patents

Abstract

The present invention relates to a pneumatic energy storage device, the bottom of the tank is open and the water and compressed air stored therein; One end is disposed inside the tank through the open bottom surface of the tank, and the other end is disposed outside to supply compressed air to the tank; An exhaust pipe discharging the compressed air inside the tank to the outside of the tank; And a fixing member provided below the tank to fix the tank to the bottom, wherein the tank provides a pneumatic energy storage device using hydraulic pressure, wherein a part or the whole of the tank is locked below the surface of the water.
According to the present invention, the tank for storing using compressed air uses the natural principle of water pressure and buoyancy to prevent high heat generated when compressing air, and the risk of explosion of high pressure tank, etc. It is possible to remove urea relatively easily by using water pressure, to make energy storage facilities large, and to store these high-pressure compressed air in large quantities, and to generate compressed air thus obtained. It is possible to apply it to other forms of energy, such as electricity.

Description

Apparatus for storing air pressure energy by using hydraulic pressure}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a storage device for storing pneumatic energy among various energy storage technologies. In particular, the present invention relates to a storage device for installing pneumatic energy in water to collectively store compressed air produced by mechanical energy using water pressure to form pneumatic energy. It relates to a pneumatic energy storage device using a hydraulic pressure configured to be stored and used.

Recently, the shortage of fossil fuels such as coal, oil, and natural gas has been intensified due to the rapid demand of energy, and environmental pollution is gradually becoming a social problem. To solve these problems, various eco-friendly products with high energy efficiency and low environmental pollution There is a growing interest in energy sources.

In general, as a method of obtaining energy using the natural environment, various methods such as hydro power generation using water level difference, wind power generation using wind, solar power generation using solar energy, and wave power generation using wave power generated from the sea, etc. There are ways.

In such a power generation method, in the case of the hydroelectric power generation, it is necessary to construct a dam to secure abundant flow rate, it is difficult to reuse the water after the fall, and the low water flow rate in the low and dry seasons and the freezing period has a disadvantage in generating power. have.

In addition, wind power and solar power are also greatly affected by natural phenomena and meteorological changes that change frequently, there is a geographical limitation of the installation site, nuclear power and thermal power generation has the disadvantage of emitting environmental pollutants.

On the other hand, compressed air produced through an air compression means such as a compressor or a cylinder is an energy source that can be used in power generation facilities or power storage facilities, and is conventionally used to store it in the form of energy. Since no device is provided, development of such a pneumatic energy storage device is urgently needed.

The present invention has been made in view of the problems and necessity of the prior art as described above, an object of the present invention to provide a pneumatic energy storage device using a hydraulic pressure capable of storing the compressed air produced through the air compression means.

Another object of the present invention is to provide a pneumatic energy storage device using hydraulic pressure capable of converting the compressed air obtained as described above into a power generation system and converting it into another type of energy such as electricity.

The present invention, the tank 200 is the bottom surface is open and the water and compressed air is stored therein; One end is disposed inside the tank through the open bottom surface of the tank, and the other end is disposed outside to supply compressed air to the tank; An exhaust pipe 230 configured to discharge the compressed air inside the tank to the outside of the tank; And a fixing member 270 provided at a lower side of the tank to fix the tank to the bottom, wherein the tank is partially or entirely submerged below the water surface. to provide.

In addition, the present invention, the tank 300 is the bottom surface is opened and the water and compressed air is stored therein; One end is disposed in the tank through the open bottom surface of the tank, the other end is disposed outside to supply the compressed air into the tank 310; And an exhaust pipe 330 for discharging the compressed air inside the tank to the outside of the tank, wherein the tank 300 provides a pneumatic energy storage device using hydraulic pressure, characterized in that it floats in water.

The intake pipe is provided with a first check valve for selectively opening or closing the intake pipe, and the exhaust pipe is provided with a second check valve for preventing backflow of air moving through the exhaust pipe.

According to the pneumatic energy storage device using the water pressure of the present invention as described above, has the following effects.

It is possible to produce compressed air through air compression means such as compressors or cylinders, and then store it.In particular, it is possible to store these high-pressure compressed air in large quantities. It is possible to convert it to other forms of energy, such as electricity.

In addition, the tank that stores the compressed air uses the natural principle of water pressure and buoyancy to prevent the high heat generated when air is compressed, and strict specifications are required for explosions in vacuum or high pressure tanks. However, the use of hydraulic pressure can eliminate these hazards relatively easily and make it possible to build large energy storage facilities.

In addition, there is an advantageous advantage such that it is possible to maintain a proper pressure by the water pressure of water even when the pressure inside the tank suddenly drops using a large amount of air pressure.

1 is a perspective view showing a pneumatic energy storage device using water pressure according to an embodiment of the present invention,
2 to 3 are side cross-sectional views of a partial configuration of the pneumatic energy storage device of FIG.
4 to 5 is a side cross-sectional view showing a pneumatic energy storage device using a water pressure according to another embodiment of the present invention.

Hereinafter, a pneumatic energy storage device using water pressure according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

First Embodiment

1 is a perspective view showing a pneumatic energy storage device using a water pressure according to an embodiment of the present invention, Figures 2 to 3 are side cross-sectional views of a partial configuration of the pneumatic energy storage device.

1 to 3, the pneumatic energy storage device using the water pressure according to another embodiment of the present invention is installed in the water (W), such as a dam or the sea. It may be installed so as to be completely submerged in water, or the upper part may be installed to come out above the surface of the water. In FIG. 1, only a part of the tank is submerged in water for convenience of description, and in FIG. 2, the entire tank is submerged in water for convenience of description. The pneumatic energy storage device according to the present embodiment includes a tank 200 for storing air, an intake pipe 210 for introducing air into the tank, an exhaust pipe 230 for discharging air to the outside of the tank, and the like. .

The tank 200 may be made into a substantially rectangular parallelepiped shape or a cylindrical shape, and the bottom surface of the tank may be opened so that water may freely flow in and out. A fixing member 270 for fixing the tank to the bottom is disposed under the tank, and the fixing member fixes the tank to the bottom of the water by various connecting means such as bolts.

The intake pipe 210 is disposed on the side of the tank up and down. One end of the intake pipe is disposed in the water below the tank 200. That is, one end of the intake pipe may be disposed inside the tank past the open lower portion of the tank (see FIG. 2), or may be disposed below the bottom of the tank (see FIG. 3).

In other words, as shown in FIG. 2, one end of the intake pipe is located in the water stored in the tank, and the air from one end of the intake pipe 210 moves upward with its own buoyancy force and is stored in the tank. Alternatively, even when one end of the intake pipe is disposed just below the bottom of the tank as shown in FIG. 3, air from one end of the intake pipe 210 moves upward with its own buoyancy force and is stored in the tank. And the other end of the intake pipe 210 is connected to the external air inlet device. The external air inlet device is an air compression means consisting of a compressor or a cylinder. In FIG. 1, only two intake pipes 210 are shown, but this is an exemplary illustration and the intake pipe 210 may be formed in a large number of small pipes as necessary.

In addition, a first check valve 215 is provided on the intake pipe 210 to selectively open or close the intake pipe. In the first check valve, air may be introduced into the tank through the intake pipe. Therefore, the air in the tank cannot be discharged through the intake pipe. The bottom of the tank is open so that water can move freely in and out of the tank, and the height of the water inside the tank is lowered as the pressure of the air stored above is increased in the tank. As the water level of the water stored inside the tank moves up and down, the pressure is automatically adjusted.

In addition, an exhaust pipe 230 for discharging the compressed air inside the tank is installed above the tank 200. One end of the exhaust pipe 230 is inserted into the tank 200 through the upper side of the tank, the other end of the exhaust pipe 230 is connected to an external device that requires compressed air through the connector 240, that is, a generator To generate electricity. In addition, a second check valve 235 is installed in the exhaust pipe 230 to prevent backflow of air moving through the exhaust pipe.

And, the upper side of the tank may be provided with a pressure control pipe 260 that can adjust the pressure, the pressure control pipe is provided with a pressure gauge 265 showing the internal pressure of the tank.

 According to the present invention having the configuration described above, when compressed air is produced through an air compression means such as a compressor or a cylinder, the compressed air is introduced into the tank 200 through the intake pipe 210. The air introduced into the tank rises upward by buoyancy in the tank and is stored in the upper side of the tank 200. As the incoming air increases, the amount of air that accumulates increases and the pressure rises, causing the water level inside the tank to go down.

In this way, the first check valve 215 closes the intake pipe 210 in a state where the compressed air is completely filled in the tank 200. The air in the tank is subjected to water pressure by the water present at the bottom and maintains a constant high pressure.

Then, when it is necessary to use the compressed air stored in the tank, the second check valve 235 of the exhaust pipe 230 is opened and the compressed air filled in the tank 200 to the outside through the exhaust pipe 230 The compressed air discharged as described above may be introduced into various devices requiring high pressure air in a subsequent process. Alternatively, it may be possible to generate electricity by driving a generator using compressed air injected at a constant pressure, or to store the generated electricity in a power storage facility.

On the other hand, if the compressed air is continuously stored in the tank 200, the pressure inside the tank is gradually increased, but when the pressure rises above the set value, the air inside the tank through the pressure control pipe 260 to the outside to the outside It is possible to keep the pressure inside the tank constant at all times by discharging it.

Second Embodiment

4 to 5 is a side cross-sectional view showing a pneumatic energy storage device using the water pressure according to the second embodiment of the present invention, the pneumatic energy storage device according to the present embodiment is not fixed to the floor in the water floating on the water surface It is composed of floating.

 Floating pneumatic energy storage device according to this embodiment is installed in the water, such as a dam or the sea, it is installed in a floating state on the surface of the water. 4 shows a part of the tank submerged in water. The pneumatic energy storage device according to the present embodiment includes a tank 300 for storing air, an intake pipe 310 for introducing air into the tank, an exhaust pipe 330 for discharging air to the outside of the tank, and the like.

The tank 300 may be made into a substantially rectangular parallelepiped shape or cylindrical shape, and the bottom surface of the tank may be opened so that water may freely flow in and out. The tank is then shaped to float on water. However, in order to prevent the tank from drifting to another place on the water, it may be possible to stay at a specific position by using a rope or the like. In other words, after connecting the fixing means such as a rope (not shown) to the side or bottom of the tank may be connected to the fixed point not shown.

Intake pipe 310 is disposed up and down on the side of the tank, one end of the intake pipe is disposed below the tank 300 and the other end of the intake pipe 310 is connected to the external air inlet. One end of the intake pipe may be disposed inside the tank past the open lower part of the tank (see FIG. 4), or may be disposed below the bottom of the tank (see FIG. 5).

The external air inlet device is an air compression means consisting of a compressor or a cylinder. In FIG. 4, only one intake pipe 310 is shown, but this is an exemplary illustration and the intake pipe 310 may be formed in a large number of small pipes as necessary.

In addition, a first check valve (not shown) is provided on the intake pipe 310 to selectively open or close the intake pipe, and the first check valve may allow air to flow into the tank through the intake pipe. However, the air in the tank cannot be discharged through the intake pipe. The bottom of the tank is open so that water can move freely in and out of the tank, and the height of the water inside the tank is lowered as the pressure of the air stored above is increased in the tank. As the water level of the water stored inside the tank moves up and down, the pressure is automatically adjusted.

In addition, an exhaust pipe 330 for discharging the compressed air inside the tank is installed above the tank 300. One end of the exhaust pipe 330 is inserted into the tank 300 through the upper side of the tank, and the other end of the exhaust pipe 330 is connected to an external device that requires compressed air, that is, a generator to produce electricity. I can work. In addition, a second check valve (not shown) is installed in the exhaust pipe 330 to prevent backflow of air moving through the exhaust pipe.

And, the upper side of the tank may be provided with a pressure control tube 360 to adjust the pressure, the pressure control tube is provided with a pressure gauge 365 showing the internal pressure of the tank.

The floating pneumatic energy storage device according to the second embodiment differs only in the configuration in which the tank is not fixed to the bottom of the water but floats (floating) in water, and other components are similar to the first embodiment described above. Therefore, other detailed contents will be omitted to avoid duplicate explanation.

In the pneumatic energy storage device according to the present invention described above, the inlet port through which air is introduced from the outside is installed in the water of the tank bottom. When the air from the inlet comes out of the water, the air bubble rises up by buoyancy and is stored above the tank. If the air pressure in the tank is increased by the continuously flowing air, the water in the tank is pushed down. The water level inside the tank moves up and down. Since the newly introduced compressed air is supplied from the water, it blocks the high air pressure in the tank, so it is only affected by the water pressure depending on the depth of the tank regardless of the air pressure. Therefore, even if the air pressure is low, it is relatively easy to supply air into the tank. Can be.

As described above, the pneumatic energy storage device using the water pressure according to the present invention has been described with reference to the drawings, but the present invention is not limited by the embodiments and drawings disclosed herein, and various modifications are made by those skilled in the art within the technical scope of the present invention. Of course, modifications can be made.

This energy storage facility using compressed air has the advantage of using natural wind power and hydropower, which are environmentally friendly energy, and can produce energy with a relatively simple facility.It produces compressed air, injects it into a storage tank, stores it, and utilizes it. For air conditioning, electricity can be produced by directly supplying air through a transfer pipe or driving a generator.
With the spread of new and renewable energy in accordance with the eco-friendly policies of various countries around the world, power energy storage technology is required for stable supply and demand of electricity. Compressed air storage technology using compressed air is evaluated as the most effective technology among various storage technologies. It is becoming.
The compressed air stored in the tank rises and is stored at a constant and high pressure by the hydraulic pressure and buoyancy, and even though the amount of compressed air is reduced by using a large amount of stored compressed air, the air pressure in the tank is properly maintained by the action of the hydraulic pressure and buoyancy, You can continue to introduce air.
Therefore, compressed air storage technology is a complex and multi-purpose energy storage technology that satisfies both the collection of compressed air, pressure rise, constant pressure retention and storage function. It can be easily used as energy without damaging and can produce eco-friendly renewable energy.

Claims (4)

A tank 200 in which the bottom surface is opened in water so that water flows in and out through the bottom surface, in which a large amount of compressed air is stored;
A plurality of intake pipes 210 having one end disposed in the lower water of the tank and the other end disposed outside, for supplying compressed air produced by using a compressor or a cylinder to the lower part of the tank;
An exhaust pipe 230 disposed above the tank to discharge the compressed air stored in the tank to the outside of the tank; And
It is provided on the lower side of the tank, the fixing member for fixing the tank to the bottom;
The air supplied to the lower part of the tank by the intake pipe is floated by buoyancy and stored in the tank, and the air pressure inside the tank is expanded while the air continuously supplied increases and pushes the water in the tank to the lower part of the tank. When the compressed air stored in the tank is discharged through the exhaust pipe if necessary, the water pushed out to the bottom of the tank flows back into the tank by buoyancy and the pressure of the stored compressed air is kept constant. Produces electricity, wherein the plurality of intake pipes and exhaust pipes are disposed at the lower and upper ends of the tank, respectively, there is water between them so that the intake pipes and exhaust pipes can be used without being influenced by each other Pneumatic energy storage device using hydraulic pressure. A tank 300 in which the bottom surface is opened in water so that water can flow in and out through the bottom surface, in which a large amount of compressed air is stored;
A plurality of intake pipes 310 having one end disposed in the lower water of the tank and the other end disposed outside, for supplying compressed air produced using a compressor or a cylinder to the lower part of the tank;
An exhaust pipe 330 provided on the tank to discharge the compressed air inside the tank to the outside of the tank; And
Is connected to the side or bottom of the tank 300 includes a rope to prevent the tank from floating to another place,
The tank 300 is suspended in water,
The air supplied to the lower part of the tank by the plurality of intake pipes 310 is floated by buoyancy and stored in the tank, and the air pressure inside the tank is expanded while the air is continuously supplied to expand the water in the tank. When the compressed air is stored in large quantities while being pushed to the bottom, and the stored compressed air is discharged through the exhaust pipe, water pushed out to the lower part of the tank is introduced into the tank by buoyancy and discharged while maintaining the pressure of the stored compressed air. Electricity is generated by compressed air, and the plurality of intake pipes and exhaust pipes are disposed at the lower and upper ends of the tank, respectively, and water exists between them, so that the intake pipes and the exhaust pipes are not affected by each other. Pneumatic energy storage device using water pressure, characterized in that possible. 3. The method according to claim 1 or 2,
The plurality of intake pipes are provided with first check valves for selectively opening or closing the intake pipes, respectively.
The compressor or cylinder is a pneumatic energy storage device using a hydraulic pressure, characterized in that by using the kinetic energy, such as electricity, tidal current, tidal wave, wave pressure to produce the compressed air directly supplied to the tank. The method of claim 3, wherein
The exhaust pipe, the pneumatic energy storage device using a hydraulic pressure, characterized in that the second check valve for preventing the air flowing through the exhaust pipe is installed.

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