JPH0275730A - Underground storage method for compressed air and device thereof - Google Patents

Abstract

PURPOSE:To simplify installations, while facilitate execution of work, by providing such constitution that an air storage chamber is formed by enclosing adits bored connection to a shaft bored underground, while compressed air supplied from a compressor is filled into an air storage chamber. CONSTITUTION:A shaft 1 is bored underground by a prescribed depth H, for example, at a position which is bored to the degree of 200 to 300m, and a plurality of adits 2 connected to the shaft 1 are bored. The adits 2 are enclosed by enclosing wall 3A, and respectively formed for air storage chambers 3 which are capable of storing air, while inject/exhaust ports 3B are provided on the lower part of the partition walls 3A. Further, the upper parts of partition walls 3A are connected to a compressor 5 and a power generating turbine 6 on the ground thereof pipes 4. On the other hand, water W is injected into the shaft 1 and the adits 2 so as to fill up water to a ground surface. In addition, by using an excessive night electric power, compressed air A is filled into the air storage chambers 3 by the compressor 5, and when a power consumption reaches the peak in the afternoon, compressed air A inside the air storage chambers 3 is exhausted through the pipes 4 so as to rotate the power generating turbine 6 so that the feed of electric power is carried out.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention stores compressed air underground using surplus electricity at night, and extracts the energy of the compressed air during peak power consumption such as during the day. The present invention relates to a method for underground storage of compressed air for power generation, and an apparatus therefor.

[Conventional technology]

Conventionally, the method of storing surplus power at night as compressed air and extracting it as energy for power generation during peak power consumption is to install an air storage tank on the seabed at a depth of about 200 to 300 meters, and use it to store the night power. Use a compressor to send and store compressed air,
The idea was to exhaust this compressed air during peak power consumption during the day to turn a power generation turbine to generate electricity and supply electricity.

However, in this method, the air storage tank is installed on the seabed, so when it is filled with air, a large buoyant force acts on the air storage tank, and in order to firmly fix it to the seabed, expensive equipment is required. Also, the water depth is from 200 to 3
Since a location such as 0.00 m is quite far from the land, there is a problem in that it is difficult to tow the air storage tank and install it.

[Object of the Invention] The present invention has been made in order to solve the above-mentioned conventional problems, and an object of the present invention is to provide a method and device for underground storage of compressed air with simple equipment and easy construction. This is the purpose.

C. Summary of the Invention] The method for underground storage of compressed air of the present invention to achieve the above object is to
An air storage chamber capable of storing air is formed by partitioning the horizontal shaft connected to the bottom of the vertical shaft excavated to a certain depth with a partition wall, and the horizontal shaft and vertical shaft are filled with water. Under this condition, compressed air is filled into the air storage chamber using a compressor installed on the ground using electricity at night, and the compressed air in the air storage chamber is discharged through a vibrator during peak power consumption such as during the day. It is characterized by supplying electricity by rotating a power generation turbine.

In addition, as a device to which the above method can be applied, an air storage chamber is formed by a partition wall, which is connected to a compressor and a power generation turbine by a vibrator, respectively, in a horizontal shaft connected to a vertical shaft excavated underground as described above. At the same time, it is constructed by filling these horizontal and vertical shafts with water, and using nighttime electricity, the energy is stored as compressed air by effectively utilizing the underground space, and the energy of the compressed air is used to generate electricity. It is taken out at peak consumption times.

〔Example〕

The present invention will be described in detail below with reference to the drawings, and FIGS. 1 and 2 are front sectional views illustrating an underground compressed air storage device to which the method of the present invention can be applied.

First, as shown in FIG. 1, at a position where a vertical shaft 1 is excavated underground to a predetermined depth Hl, for example, about 200 to 300 m, a plurality of horizontal shafts 2 connected to the vertical shaft are excavated.

Therefore, each horizontal shaft 2 is partitioned by a partition wall 3A to form an air storage chamber 3 capable of storing air, and an inlet/outlet 3B is provided at the lower part of the partition wall 3A, and the upper part of the partition wall 3A and the aboveground compressor 5 and power generation The vertical shaft 1 and the horizontal shaft 2 are connected to a turbine 6 by a vibrator 4, and water is injected into the vertical shaft 1 and the horizontal shaft 2, so that water W is filled up to the surface of the land.

Next, to explain the operation of the device with the above configuration, as shown in Fig. 1, using surplus nighttime electricity,
Compressed air A is filled into the air storage chamber 3 by the compressor 5, and during peak power consumption times such as during the day, the compressed air A in the air storage chamber 3 is discharged through the vibrator 4 as shown in FIG. The power generation turbine 6 is rotated to supply electric power.

Here, it is necessary to line the inner surface of the air storage chamber 3 to prevent the compressed air A from leaking.

Each vibrator 4 in the figure is provided with a three-way valve 8, a check valve 9, and a pulp 10, 11 as appropriate to perform a switching operation between filling and discharging the compressed air A.

〔Effect of the invention〕

According to the underground storage method and device for compressed air of the present invention described above, the air storage chamber is set in a horizontal shaft excavated underground, so that floating due to buoyancy as in conventional cases installed on the seabed is not possible. There is no need for protection, and since the air storage chamber is constructed directly underground, there is the advantage that underground space can be used effectively.

Furthermore, since water pressure is constantly applied to the air storage chamber, there is an advantage that great strength is not required to store high-pressure compressed air.

Furthermore, unlike the conventional case of installing an air storage tank on the seabed, there is no need to tow the air storage tank or sink it, so the installation is much easier than in the conventional case. This has the advantage that equipment costs are reduced accordingly.

In particular, in the present invention, since the horizontal shaft itself is used as an air storage chamber by using a partition wall, there is an advantage that the equipment cost is reduced accordingly.

[Brief explanation of the drawing]

1 and 2 are front sectional views illustrating an embodiment of an underground storage device for compressed air to which the method of the present invention can be applied,
FIG. 1 shows the state during storage of compressed air, and FIG. 2 shows the state of discharge of compressed air. 1...Vertical shaft, 2...Horizontal shaft, 3...Air storage room, 3
A... Partition wall, 4... Pipe, 5... Compressor, 6... Power generation turbine, A... Compressed air, H
...Predetermined depth, W...Water. Agent Patent Attorney Nobuo Ogawa −

Claims (1)

[Claims] 1. An air storage chamber is formed by connecting a vertical shaft excavated underground to a predetermined depth and dividing a horizontal shaft excavated, and the horizontal shaft and the vertical shaft are filled with water during the night. An underground storage method for compressed air that uses electricity to fill an air storage chamber with compressed air from a compressor, and then uses the compressed air in the air storage chamber to rotate a power generation turbine during peak power consumption. 2. An air storage chamber connected by a pipe to a compressor and a power generation turbine is formed in a horizontal shaft excavated by connecting to a vertical shaft excavated to a predetermined depth underground, and an air storage chamber is formed using a partition wall, and An underground storage device for compressed air filled with water.