WO2011108820A2

WO2011108820A2 - Pneumatic energy storage device using water pressure

Info

Publication number: WO2011108820A2
Application number: PCT/KR2011/001178
Authority: WO
Inventors: 이지남
Original assignee: Lee Jinam
Priority date: 2010-03-03
Filing date: 2011-02-23
Publication date: 2011-09-09
Also published as: WO2011108820A3; WO2011108820A4

Abstract

The present invention relates to a pneumatic energy storage device, and provides a pneumatic energy storage device using water pressure, comprising: a tank which has an opened bottom surface, and in which water and compressed air are stored; a suction pipe which has one end that is positioned inside the tank through the opened bottom surface of the tank, and the other end that is positioned outside and supplies the compressed air to the inside of the tank; a vent pipe which discharges the compressed air inside the tank to the outside of the tank; and a fixing member which is equipped on a lower side of the tank, and fixes the tank to the bottom, wherein a portion of or the entirety of the tank is submerged under the surface of the water. By said features, the invention is capable of: preventing high heat which is generated when the air is compressed, since the tank that uses and stores the compressed air makes use of the natural principle of buoyancy and water pressure of water; relatively easily removing dangerous factors such as the explosion of a high-pressure tank and the like by using the water pressure; manufacturing energy storage facilities on a large scale, and particularly, storing the high-pressure compressed air at high capacities; and applying the compressed air thus obtained to a power generation system, so that the air may be converted into another type of energy such as electricity.

Description

Pneumatic Energy Storage Device Using Hydraulic Pressure

The present invention relates to a pneumatic energy storage device, and more particularly, to a pneumatic energy storage device using a hydraulic pressure configured to be stored and used in the form of pneumatic energy by storing and storing compressed air using water pressure.

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, there are various methods of obtaining energy using the natural environment, 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. .

In such a power generation method, in the case of the hydroelectric power generation, a dam must be secured in order to ensure abundant flow rate, it is difficult to reuse water after falling, and there is a disadvantage in that power generation is low due to low amount of water in the dry season and the ice breaker.

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 air compression means such as a compressor (cylinder) or cylinder (cylinder) is an energy source that can be used in power generation facilities or power storage facilities, conventionally provided with a separate device for storing it in the form of energy There is no urgent development of such a pneumatic energy storage device.

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.

6 to 7 is a side cross-sectional view of a shape provided with a water reservoir on the top of the pneumatic energy storage device 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 is a side cross-sectional view of a portion 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 in this way is introduced into a device requiring high pressure air such as a spiral counter fan or a constant pressure machine in a later step, and is injected at a constant pressure via these devices to produce electricity by driving a generator. It is possible to store power in power storage equipment.

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.

6 to 7 illustrate a shape in which a water reservoir is additionally disposed on an upper portion of the tank in the pneumatic energy storage device described in the first embodiment. Except for the additionally installed water storage tank, the energy storage device of the first and second embodiments described above is basically the same.

Referring to FIG. 6, a water reservoir 290 is disposed above the tank 200 of the energy storage device described in the first embodiment, and a predetermined amount of water w is stored in the water reservoir. The water stored in the water reservoir 290 is pressed down the tank 200 by its own load. When high-pressure air enters the tank 200, the tank tries to float upward by the buoyancy of the air. At this time, the force acting downward by the load of the water stored in the water storage tank 290 cancels the buoyancy. ) Is prevented from rising above the water.

Referring to FIG. 7, a water reservoir 390 is disposed above the tank 300 of the energy storage device described in the second embodiment, and a predetermined amount of water w is stored in the water reservoir. The water stored in the water reservoir 390 is pressed down the tank 200 by its own load, and by this force to offset the force the tank tries to rise above the water to prevent the rise of the tank described above Same as

In the pneumatic energy storage device according to the present invention described above, the inlet 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 bubble floats upward by buoyancy and is stored on the upper side of the tank. If the air pressure in the tank increases due to the air flowing in continuously, the water in the tank is pushed down. Accordingly, 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.

Claims

A tank 200 in which the bottom surface is opened and water and compressed air are stored therein;

One end is disposed in the lower water of the tank, the other end is disposed outside to supply compressed air into the tank 210;

An exhaust pipe 230 configured to discharge the compressed air inside 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 tank is partially or entirely submerged below the surface of the water, the air from one end of the intake pipe is raised by buoyancy and stored in the upper side of the inside of the tank, the pneumatic energy storage device using a hydraulic pressure.
A tank 300 having a bottom open and storing water and compressed air therein;

One end is disposed in the lower water of the tank, the other end is disposed outside to supply compressed air into the tank 310;

And exhaust pipe 330 for discharging the compressed air inside the tank to the outside of the tank.

The tank 300 is suspended in water,

Air from the one end of the intake pipe is raised by the buoyancy buoyancy energy storage device using the water pressure, characterized in that stored in the upper side of the tank.
The method according to claim 1 or 2,

The intake pipe, the pneumatic energy storage device using water pressure, characterized in that the first check valve for selectively opening or closing the intake pipe is installed.
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.
The method of claim 4, wherein

The upper portion of the tank is provided with a water reservoir,

Pneumatic energy storage device using a hydraulic pressure, characterized in that the tank is forced downward by the weight of the water contained in the water reservoir.