JP2000352371A - Compressed air storage type combined power generation system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To store compressed air utilizing pumped-up water and generate electricity by effectively utilizing draft generated in association with pump operation. SOLUTION: To a regulating reservoir 1 water in a water tank part 7a of an underground impounding reservoir 7 is pumped-up by driving a pump of a pump turbine generator 5. In this case, air flows into an air compression part 7b through a switch valve 12, an air turbine 13, a switch valve 15, pipes 17, 10, and a control valve 11. The air drives the air turbine 13 and thus rotates a generator 14 to generate electricity. The pumped-up water falls through a pipe 3 from the regulating reservoir 1 and generates electricity by driving the pump turbine generator 5. Then the water flows into the water tank part 7a of the underground impounding reservoir 7, raises the water level there, and compresses air in the air compression part 7b. The compressed air is led into a CAES power generation plant 21 by way of a tank 20 and also to the air turbine 13 for generation of electricity and then discharged through a silencer 16.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combined power generation system for compressed air storage, and effectively utilizes a process of storing compressed air or an air flow or a water flow generated during power generation using compressed air, and is conventionally left unnecessarily. It is a system that makes effective use of energy.

[0002]

2. Description of the Related Art FIG. 11 shows a compressed air storage power generation system (C).
FIG. 3 is a diagram showing an example of an AES), which is a part of a file already filed by the present applicant. In the figure, reference numeral 100 denotes an upper regulating pond in which water is stored. 101 is a headrace, 102
Denotes a pump turbine, which serves as a pump to supply water to an upper regulating pond 10.
The water is pumped to zero and the water from the upper reservoir 100 is used as a water wheel. 103 is a motor generator, and the pump turbine 1
02 and operates as an electric motor when the pump is operated, and as a generator when driven by the water wheel. 104 is a headrace, 105 is a lower regulating pond, which has a closed structure, and an upper part is an air reservoir 106. 10
7 on one air tube communicates with the atmosphere through the air release valve V _1, and the other is connected to the regenerator 110 via the air valve V _2. Reference numeral 108 denotes a generator, 109 denotes a combustor for burning the fuel f, T ₁ denotes an air expansion turbine, and T ₂ denotes a gas turbine, which are operated by combustion gas from the combustor 109. 110 regenerator, 111 is a chimney and discharged to the atmosphere after recovering exhaust heat from the exhaust gas of the gas turbine T _2.

[0003] In the system having the above-described configuration, first, the upper regulating pond 100 with the air release valve V ₁ and the air supply valve V ₂ closed.
, The water falls through a water channel 101 onto a pump turbine 102, and when the motor generator 103 is driven by the pump turbine 102, the electric power is generated by the motor generator 103. In this process, water from the headrace 104 is supplied to the lower regulating pond 105.
, And the air in the upper air reservoir 106 is compressed. This compressed air passes through the regenerator 110 as indicated by a ₂ by opening the air supply valve V ₂ , is heated by the exhaust heat from the gas turbine T ₂ in the regenerator 110, and
_It is led to ₂ and expands to work and rotate the turbine. Air expanded by the work directed to the combustor 109, is subjected to combustion together with fuel, it is supplied to the gas turbine T ₂ become hot combustion gases.

[0004] Also, when pumping the upper balancing reservoir 100 opens the atmosphere release valve V _1, through the conduit 104,101 from the lower balancing reservoir 105 by driving the pump-turbine 102 by the electric generator 103, The water is guided to the upper regulating pond 100 and stored. In this case, the air pipe 107 is sent as shown by the air a ₁ from the atmosphere and is introduced into the air reservoir 106 above the lower regulating pond 105.

FIG. 12 is a configuration diagram showing another example of the compressed air storage power generation system. In the figure, a large number of steel tanks 200 are installed on the seabed 201 via the support portions 202 so that the water depth L is about 400 m on the seabed 201. The tank 200 has a closed structure, into which water 210 flows,
An air reservoir 211 is formed at the upper part. An air pipe 203 communicates with an air reservoir 211 of each steel tank 200, and the air pipe 203 is guided onto a water surface 204 and connected to a switching valve 205. The switching valve 205 is an air pipe 2
03 is connected to an air cooler 206 and a regenerator 207, respectively. 208 is a chimney, M is a motor for driving the compressor C, T is a gas turbine, CC
Is a combustor and guides a high-temperature combustion gas to the gas turbine T.

In the system having the above structure, the compressor C is driven by the electric motor M to absorb the heat generated by the compression in the air cooler 206, and the compressed air passes through the air pipe 203 via the switching valve 205. Then, it is stored in the air pool 211 in the steel tank 200. At this time, the internal water 210
Is pushed out of the tank through a hole (not shown) by the introduced air and flows out, and the air is compressed and stored in the air pool 211. When using stored compressed air,
By switching the switching valve 205, the compressed air from the air reservoir 211 in the steel tank 200 is led to the reheater 207 through the air pipe 203, heated by the exhaust heat of the gas turbine T, and then led to the combustor CC. The fuel is burned together with the fuel, and guided to the gas turbine T as a high-temperature combustion gas. In the gas turbine T, the rotor is driven by the high-temperature combustion gas to generate electric power, and the exhaust gas is guided to the regenerator 207, gives exhaust heat to the air flowing into the gas turbine T, and is discharged from the chimney 208 to the atmosphere.

[0007] As described above, in the system of FIG.
In the system shown in FIG. 12, compressed air is stored in the submersible tank 200,
A proposal has been made in which compressed air is sent to 11 and compressed air is taken out and used using water pressure to generate electricity.

[0008]

As described above, systems as shown in FIGS. 4 and 5 have been proposed as compressed air storage and power generation facilities, and the system of FIG. 11 utilizes excess power at night. Lower reservoir 105 to upper reservoir 100
Water is pumped up, and in the daytime power demand, the water in the upper regulating pond 100 is dropped to produce compressed air. Also, in the system of FIG. 5, the compressor is driven by surplus power at night to convert the compressed air into water. Store in tank. These compressed air can be taken out during daytime power demand and used for power generation, so it is attracting attention as a powerful power generation system.

However, in the system shown in FIG. 11, when the air release valve V ₁ is opened, the pump turbine 102 is driven by the motor generator 103 as a pump, and water is pumped from the lower regulating pond 105 to the upper regulating pond 100, A ₁ from the atmosphere
As shown by, air is sucked into the air pipe 107 and flows into the air reservoir 106 of the lower regulating pond 105. Flow a ₁ of the air flow at this time has become To as it is without being utilized at present. If this air flow is used, the energy can be used more effectively.

Also in the system shown in FIG. 12, when air flows into the air reservoir 211 above the tank 200 while the compressor C is driven and air is injected from the air pipe 203 into the steel tank 200 in the water. The water 210 inside is pushed up and flows out through a hole (not shown) to the outside of the tank 20.
Water flow occurs around zero. It is thought that if this water flow is used well, it will lead to more efficient system as a whole, but it is not used effectively at present.

Therefore, in the present invention, in the compressed air storage combined power generation system, in order to utilize the air flow and water flow generated in the process of storing the compressed air, an air turbine and a water turbine generator are incorporated in the system and the air flow and water flow are integrated. The task was to make effective use.

[0012]

The present invention provides the following means (1) to (12) to solve the above-mentioned problems.

(1) An upper regulating pond, a lower regulating pond having a closed structure having an air reservoir in an upper portion, and connected between the upper regulating pond and the lower regulating pond, from the lower regulating pond to the upper regulating pond. A pump-turbine generator that generates power by water falling from the upper regulating pond to the lower regulating pond, and a power generating facility that generates electricity by using air compressed in the air reservoir of the lower regulating pond. An air turbine driven by an air flow sucked from the atmosphere into an air reservoir of the lower regulating pond when pumping water from the lower regulating pond to the upper regulating pond. Compressed air storage combined power generation system.

(2) The combined power generation system according to (1), wherein the compressed air stored in the air reservoir of the lower regulating pond is used for power generation in the power generation facility, and the air turbine can also be driven.

(3) A pressure tank is provided for guiding and storing a part of the air compressed in the air reservoir of the lower regulating pond,
The combined power generation system according to (1), wherein auxiliary air of the pump-turbine generator can be driven by the air in the tank.

(4) An on-off valve is provided in parallel with the flow path of the water from the lower regulating pond to the pump turbine generator to bypass the same flow path and communicate the upper regulating pond and the lower regulating pond. The combined power generation system according to (1), wherein a bypass passage is provided.

(5) The lower regulating pond is provided with a system for guiding a part of the stored water as cooling water to the turbine of the power generation facility, and a flow for communicating the water after cooling the turbine to the upper regulating pond. The power generation system according to (1), further comprising a system path connected to the road.

(6) A tank which is installed in the water with an air reservoir provided at an upper portion thereof and formed so that the lower water communicates with the water, a compressor for sending air to the air reservoir of the tank, In a power generation system having a power generation facility for generating power using compressed air stored in an air reservoir, the tank is installed in a cavity in a rock underwater, and a flow path communicating with the water is provided in the cavity, A combined compressed air storage power generation system, wherein a generator driven by water flow in a flow path is provided on a road.

(7) The generator generates power both when sending air to the air reservoir in the tank and when using the compressed air from the air reservoir in the power generation equipment. The combined power generation system according to (6), which is characterized in that:

(8) The tank is connected to a pressure tank which takes in and stores a part of air from an air reservoir, and a motor operated by air from the pressure tank and a generator driven by the motor. The combined power generation system according to (6), further comprising a flow control blade.

(9) A variable water flow path extending to the ground is connected to a flow path outlet provided in the rock-inside cavity, and a connecting portion between the variable water flow path and a flow path communicating with the hollow is provided in the hollow. (6) A flow path switching valve is provided for communicating the provided flow path with either the water bottom or the fluctuating water path.
A combined compressed air storage power generation system according to claim 1.

(10) The combined power generation system according to (9), wherein the variable water flow path is turned back on the ground side, disposed again under water, and opened near the bottom of the water.

(11) The connecting portion between the flow path provided in the rock mass cavity and the variable water flow path extends toward the water surface via the flow path switching valve, and communicates with the variable water flow path at the water surface. A rising discharge variable water flow path is connected, and a connection portion of the rising flow fluctuation water flow path through the flow path switching valve is provided with a water discharge control valve for opening and closing between the rising flow fluctuation water flow path and the water bottom. (10) The combined power generation system according to (10).

(12) A tank which is installed in water with an air reservoir provided at an upper portion, and is formed so that the lower water communicates with the water, a compressor for sending air to the air reservoir of the tank, In a power generation system having a power generation facility for generating power using compressed air stored in an air reservoir, the tank includes a tank having a closed bottom container and a tank having a bottom open container. A container that hermetically covers the container, a first pipe communicating with the container and extending toward the water surface, a closed tank on the surface of the water connected to the first pipe, and one end connected to the closed tank to be submerged. A second pipe extending toward the bottom and opening the other end in water; a flow path switching valve provided in the middle of the first pipe to open and close the first pipe underwater; and a tank near the lower end closed container Open to the water surface An air lift nozzle which is inserted into the underwater opening of the third pipe and guides a part of air from an air reservoir of a tank of the lower end closed container to generate air bubbles; A combined power generation system comprising: an air-water separation tank on the ground connected to the pipes of the above; and an air turbine connected to the air-water separation tank.

In (1) of the present invention, when the pump / turbine generator is operated as a pump and water is pumped from the lower regulating pond to the upper regulating pond, air sucked from the atmosphere passes through the air turbine and passes through the turbine. It drives and flows into the air reservoir of the lower regulating pond. Therefore, power generation can be performed by the air turbine using the suction airflow, which has not been conventionally used. Also, when the pump turbine generator is driven as a generator by the water that falls from the upper reservoir to the lower reservoir, the water in the upper reservoir is compressed by the water that flows into the lower reservoir, and the compressed air is stored. can do. The compressed air is supplied to a power generation facility to generate power.

According to (2) of the present invention, even when the compressed air is used in the power generation equipment or when the compressed air is not used in the power generation equipment, the compressed air is switched by a valve, for example, to switch the air turbine. To drive the air turbine to generate power, thereby expanding the application range of the system.

In (3) of the present invention, the auxiliary equipment of the pump turbine generator is driven by the air from the pressure tank, and (4)
According to the invention, since the bypass flow path is provided, when the pump-turbine generator is not driven, the water in the upper regulating pond can be made to flow directly into the lower regulating pond by opening the on-off valve. According to the invention of (5), a part of the water stored in the lower regulating pond is guided to the power generation facility on the ground, the turbine is cooled, and the cooled water is returned to the upstream side of the pump turbine generator again. According to the inventions of (3), (4), and (5), the water stored in the lower regulating pond in the invention of (1) can be effectively used.

In (6) and (7) of the present invention, not only when air is sent to the underwater tank by the compressor, but also the compressed air in the tank is taken out and used by the power generation equipment on the ground to generate electricity. In any case, power is generated by the water flow generated in the flow path by the generator installed in the flow path of the rock, so that the water flow that has been conventionally left as it is can be effectively used.

In (8) of the present invention, part of the air from the air reservoir of the underwater tank is stored in the pressure tank, and the motor is operated by this air to adjust the angle of the flow regulating blade of the underwater generator. Since the water flow flowing into and out of the generator can be adjusted by adjustment, the output of the generator can be easily adjusted.

In (9) of the present invention, the variable flow water flowing out of the flow path in the rock is guided to the surface of the water by the variable water flow path by closing the flow path switching valve from the water bottom side, and the variable water is used in the facilities on the ground. Can be. In addition, the fluctuating water generated when using the compressed air in the tank opens the flow path switching valve to the bottom of the water and flows out from the flow path in the rock into the water. Further, in the invention of (10), the flowing water flow accompanying the rise in the water level in the tank is sucked from the fluctuating water flow path opened near the water bottom with respect to the configuration of (9), and returns to the water bottom again through the water surface. Flows into the internal flow path. (The water level in the tank is raised.) At this time, the water surface of the variable water flow path can be used on the ground.

According to the invention of (11), in addition to the constitution of the invention of (10), since a rising / falling water flow path is further provided, the water level in the tank when the compressed air is sent into the tank is lowered. Fluctuation of the flowing water is guided to the water surface from the rising fluctuation water flow path by opening the flow path switching valve and closing the water discharge control valve. Fluctuation of flowing water due to rise of water level in the tank when taking out compressed air in the tank closes the flow path switching valve,
It is sucked from the bottom of the water by the fluctuating channel and transmitted to the water surface,
Then it descends into the water and returns to the channel in the rock. Therefore, since both flows of the variable water are transmitted on the water surface, both of these flows can be used.

In (12) of the present invention, the flowing water accompanying the lowering of the water level in the tank of the open bottom container is discharged into the water by opening the flow switching valve of the first pipe, and the water level in the tank rises. The flowing water is sucked from the opening of the second pipe and enters the closed tank on the surface of the water, and the rise in the water level in the closed tank at this time can be used in facilities on the ground. In addition, wake water is sucked in from the underwater opening of the third pipe, and part of the air in the tank of the lower end closed container flows out from the air lift nozzle into the third pipe as bubbles, In the steam / water separation tank, the fluctuation of the water flow can be used by external equipment, and the air turbine is driven by pressurization by air bubbles. As described above, the supply of compressed air into the tank of the conventional compressed air storage and power generation system and the fluctuation water accompanying the outflow of compressed air from the tank can be effectively recovered as power.

[0033]

Embodiments of the present invention will be specifically described below with reference to the drawings. FIG. 1 is a configuration diagram of a compressed air storage combined cycle power generation system according to a first embodiment of the present invention. In the figure, reference numeral 1 denotes a regulating pond provided on the ground, and 2 denotes a port for taking in and discharging water at an intake / drainage port (A). 3 is a vertical pipe (D), and 4, 6, and 8 are also pipes. Reference numeral 5 denotes a pump-turbine generator of the power plant (B), which is used as a pump at the time of pumping and operates as a turbine at the time of utilizing pumping.

Reference numeral 7 denotes an underground reservoir (C), the lower part of which is a water tank part 7a, the surface of which is provided so as to be 800 m above the ground. The upper part of the underground reservoir 7 is composed of an air compressor 7b, and the upper end of the air compressor 7b is 400 m above the ground.
It has become. Reference numerals 9 and 10 denote pipes on which an on-off valve 11 is provided. 12 is a switching valve, 13 is an air turbine, 14
Is a generator driven by the air turbine 13, 15 is a switching valve, 16 is a silencer for releasing air to the atmosphere, and 17 is a pipe connecting the switching valve 15 and the pipe 10. Reference numeral 20 denotes a ground air tank for storing compressed air. Reference numeral 21 denotes a CAES power generation plant that generates electric power by using the compressed air in the tank 20.

FIG. 2 is a perspective view showing the main part of the underground in FIG. 1. The upper surface of the underground reservoir (C) 7 is disposed 800 m below the intake and drainage opening (A) 2 and the underground reservoir (C).
A pump / turbine generator 5 combining a pump of the power plant (B) and a turbine / generator is provided at a lower portion 7 to pump water from a reservoir (C) 7 and to generate electricity from water from an upper regulating pond 1. Can flow into the reservoir (C) 7.

In the compressed air storage and power generation system having the above structure, when pumping water, first, the air side of the switching valve 12 is communicated with the air turbine 13 side, the silencer 16 side of the switching valve 15 is closed and opened and closed. The valve 11 is kept open. In this state, the pump-turbine generator 5 is driven as a pump, and the water in the water tank portion 7a of the underground reservoir 7 is piped 6,
The water is pumped from the intake / drainage port 2 to the regulating pond 1 on the ground through 4 and 3. At this time, since the water level in the water tank section 7a decreases, air from the atmosphere is sucked into the air compression section 7b from the switching valve 12 through the air turbine 13, the pipe 17, the pipe 10, and the on-off valve 11. Flows into the air compression section 7b through the pipe 8 as shown by arrows. The air turbine 13 is driven by the air sucked from the atmosphere,
By rotating the generator 14, electric power is obtained.

When utilizing the pumped water of the regulating pond 1 on the ground,
First, the on-off valve 11 is closed, the lower side of the switching valve 12 is also closed, and water is taken from the regulating pond 1, dropped through the drain port 2, into the pipe 3, passed through the pipe 4, and the pump-turbine generator 5 is turned off. It drives as a water turbine generator to generate electricity, and guides water to the underground reservoir 7 through the pipe 6.

In the underground reservoir 7, water flows into the water tank portion 7a, and when the water level rises above the level of the upper surface, the air in the compression region (air compression portion) 7b is compressed, and the compressed air is stored in the tank 20. Then, it is guided from the tank 20 to the CAES power generation plant 21 and provided for power generation.

When the on-off valve 11 is closed, the switching valve 12 is switched to communicate with the air turbine 13, and the switching valve 15 is also communicated with the silencer 16, the compressed air is supplied to the pipe 9, the switching valve 12, and the air turbine. 13. Silencer 1
6 to the atmosphere. Also in this case, the air turbine 13 is driven using the compressed air, and the generator 14 is turned to generate power.

According to the first embodiment described above, the air turbine 13 is driven by the air flow generated when the pump-turbine generator 5 is driven as a pump to pump water from the underground reservoir 7 to the upper regulating pond 1. It is driven, and the power generator 14 can be turned to generate power. Also, since the air turbine 13 can be driven even by using compressed air, the combination of the pump turbine generator 5 and the CAES power plant 21 can be used to utilize the airflow not conventionally used in the combined power generation system, This allows for effective use of energy. The air tank 20 is not placed on the ground (Fig. 3) (D)
May be used also as the tank (FIG. 3).

FIG. 3 is a configuration diagram of a combined compressed air storage power generation system according to a second embodiment of the present invention. In the figure, in a second embodiment of the present invention, a pressure tank 22 for pumping P / S and a pipe 2 are added to the configuration according to the first embodiment shown in FIG.
3, provided with an on-off valve 24, and the other configuration is the same as that of FIG. In the second embodiment, the open / close valve 24 of the compressed air in the compressed air portion 7b is opened and stored in the pressure tank 22 from the pipe 23, and the pump / turbine generator in the power plant (B) or the auxiliary machine is used. This is used to drive the motor. Therefore, the use of the pump-turbine generator 5 of the system shown in FIG. 1 is convenient.

FIG. 4 is a configuration diagram of a combined compressed air storage power generation system according to a third embodiment of the present invention. In the third embodiment, a bypass pipe 25 is added to the configuration according to the first embodiment shown in FIG. 1, and the other configuration is the same as that in FIG. In the third embodiment, when the pump-turbine generator 5 of the power plant (B) is not used, the bypass pipe 25a is opened, and the water from the regulating pond 1 is transferred from the bypass pipe 25 to the underground reservoir (C) 7. Water can be sent directly, and this flow path is used for inflow water to (D) when air is used in CASE 21 power generation. Other configurations are the same as those in FIG. FIG. 5 is a configuration diagram of a combined compressed air storage power generation system according to Embodiment 4 of the present invention.
Referring to FIG. 5, a fourth embodiment of the present invention is different from the conventional system shown in FIG. 12 in that a steel tank is provided in a rock mass communicating with water, and a water flow generated in the rock mass is effectively used. . Accordingly, reference numerals 200, 202 to 208, 210, and 211 are the same as those in the conventional example shown in FIG. 12, and a detailed description thereof will be omitted. These parts are shown below, and these parts will be described in detail below.

In FIG. 5, a cavity 31 in the bedrock is excavated below the surface of the bedrock 30, and this cavity 31
Connected to the water. A turbine generator 32 is provided near the outlet of the flow path 32 into the water. A large number of steel tanks 200 are provided in the rock mass cavity 31 and supported by the support portion 202, and are installed such that the air reservoir 211 is located at about L = 400 m from the water surface 204 as in the conventional example. ing.

In the fourth embodiment of the present invention, the compressor C is driven by the electric motor M, the heat generated by the compression is recovered by the air cooler 206, and the compressed air is supplied to the switching valve 205.
Through the air pipe 203 and stored in the air reservoir 211 in the steel tank 200. At this time the water 21 inside
Numeral 0 is pushed out of the tank through a hole (not shown) by the air to be introduced and flows out. At the same time, since water pressure is applied, the air is held in the air reservoir 211 at a pressure as it is compressed.

When the compressed air is used, the switching valve 205 is switched to switch the air reservoir 2 in the steel tank 200.
11 is led to the reheater 207 through the air pipe 203 and heated by the exhaust heat of the gas turbine T.
C, is burned together with fuel, and is guided to a gas turbine T as a high-temperature combustion gas, and a generator is turned to obtain electric power. The exhaust gas from the gas turbine T is led to the reheater 207,
Exhaust heat is given to the air flowing into C, and the air is discharged from the chimney 208 to the atmosphere.

In this process, first, air is introduced from the compressor C into the air reservoir 211 in the steel tank 200, and when compressed, the water 210 in the tank 200 is pushed out by the introduction of air. The extruded water flows out of the rock channel 32 as a water flow. Since this water current drives the turbine generator 33 as shown by the solid arrow,
Electric power is generated, and the water flow generated in the compression process is effectively used as energy.

Further, in the case of using compressed air, when the air flows out of the air reservoir 211 in the tank 200, the water level of the water 210 rises, and the water flows from the outside into the tank. This inflowing water flows in from the entrance of the channel 32 in the bedrock as a water flow as shown by a dotted arrow in the figure, so that the generator 33 is driven by this water flow, and electric power is obtained.
The compressed air drives the gas turbine T, and the generator 3
3 can also provide power.

In the fifth embodiment described above, a rock-inside cavity 31 communicating with water is provided underground, a steel tank 200 is installed in the cavity 31, compressed air is stored, and this compressed air is produced. In addition, the water flow generated in the use process can be taken out as electric power and used effectively.

FIG. 6 is a configuration diagram of a combined compressed air storage power generation system according to a fifth embodiment of the present invention. The feature of the fifth embodiment is that reference numeral 3 in the fourth embodiment of FIG.
4 to 36, the compressed air in the steel tank 200 is used for driving the auxiliary equipment of the water turbine generator 33, and the other configuration is the same as that of the fourth embodiment in FIG. It is.

In FIG. 6, a part of the compressed air in the air reservoir 211 in the steel tank 200 is stored in the pressure tank 34 by opening the on-off valve 34a, and the compressed air is driven by the motor 35 into the rock. The angle of the flow regulating blade provided in the flow path 32 can be adjusted. The flow rate adjusting blade 36 is disposed immediately before the turbine generator 33, and can adjust the flow of water flowing into and out of the channel in the rock, and can adjust the rotation speed of the turbine generator 33. Therefore, the fourth embodiment shown in FIG. The function of the turbine generator 33 in the embodiment is improved. Other structures,
The operation is the same as that of FIG.

FIG. 7 is a configuration diagram of a combined compressed air storage power generation system according to Embodiment 6 of the present invention. The feature of the sixth embodiment is that, in the fourth embodiment of FIG. 5, the water turbine generator 33 is removed, and a flow channel indicated by reference numeral 37 and a flow path switching valve V are provided instead. Others are the same as the fourth embodiment shown in FIG.

In FIG. 7, the water flow in the channel 32 in the bedrock is a
In the case of the direction, the flow path switching valve V operates so as to close the sea bottom side as shown in the figure, and connects the flowing water channel 37 and the flow path 32 in the rock. In such a state, when the air in the pipe 203 flows in the a direction and the water flow in the flow path 32 also occurs in the a direction,
The water flow passes through the flowing water channel 37 and is transmitted to the ground, where the energy of the water flow is used.

When the air flow in the pipe 203 is in the direction b,
The water flow in the channel 32 in the bedrock is also generated in the direction b. In this case, the channel switching valve V closes the channel 37 and the channel 32 in the bedrock.
To communicate with the sea floor. In this case, water is taken from the seabed, and the seawater can be taken into the steel tank 200. Other basic configurations and operations are the same as those of the fourth embodiment shown in FIG.
According to the sixth embodiment, as shown in FIG. 5, instead of mounting the turbine generator 33 in the channel 32 in the rock, the water channel 3
With a simple configuration in which the flow path 7 and the flow path switching valve V are provided, the generated water flow a can be used on the ground.

FIG. 8 is a configuration diagram of a combined compressed air storage power generation system according to Embodiment 7 of the present invention. The feature of the seventh embodiment lies in portions indicated by reference numerals 38a, 38b, and V. Compared with the sixth embodiment of FIG.
Although only the water flow in the direction b is used on the ground, in FIG. 8, the water flow in the direction b is used on the ground. Other configurations and operations are the same as those of the fourth embodiment shown in FIG. If V is always closed, the water flow will be in the opposite direction, but the water flow in direction a can also be used on the ground.

In FIG. 8, when a water flow in the direction a is generated in the flow path 32 in the rock, the flow path switching valve V opens to the bottom of the sea, and the flow path 32 in the rock is connected to the sea floor. The water flow a in the flow path 32 generated by the air flow is caused to flow out to the seabed. When a water flow in the b direction occurs in the flow path 32 in the rock, the flow path switching valve V closes, and the flow path 32 in the rock and the flow path 3
8a and 38b. In such a state, water from the sea floor flows into the flowing water channel 38a, and a part of the water flow is used on the ground, and the water flow b passes through the flowing water channel 38a, and flows from the rock channel 32 into the steel tank 200. Inflow. Other configurations and operations are the same as those of the fourth embodiment shown in FIG.

FIG. 9 is a configuration diagram of a combined compressed air storage power generation system according to an eighth embodiment of the present invention. The feature of the eighth embodiment is that reference numerals 38a, 38b, 39, V and V
7, the water flow in the direction a in FIG. 7 and the water flow in the direction b in FIG. 8 are used on the ground, respectively, as compared with the sixth and seventh embodiments of FIGS. In FIG. 9, the water flow in both directions a and b can be used.

In FIG. 9, when a water flow in the direction a occurs in the flow path 32 in the rock, the flow path switching valve V closes the flow path 38 a and connects the flow path 32 in the rock and the flow path 39. At this time, if the water discharge control valve V2 is closed, the water flow a
It flows toward the ground from 9, and the water flow is available on the ground. When the water discharge control valve V2 is opened, the water flow a flows out to the sea floor.

When the water flow b is generated in the channel 32 in the rock,
When the flow path switching valve V is operated, the flow path 32 in the rock and the flowing water path 38a
And communicate. At this time, the water flow b is
b to the ground or open the valve V2 to open the water stream b
Can be used on the ground, and the water flow b flows from the flowing water channel 38b into the channel 32 in the rock, and raises the water level in the tank 200. Other configurations and operations are the same as those of the fourth embodiment shown in FIG.

FIG. 10 is a configuration diagram of a combined compressed-air storage power generation system according to a ninth embodiment of the present invention. Ninth of this embodiment
In the embodiment, the conventional system shown in FIG. 12 is provided with piping 40, 41 and a tank 42, and further provided with a piping 43 and a steam separation tank (SEP) 44. Compressor C, gas turbine T, combustor CC, and reference numeral 203 to
The configuration of the device 208 is the same as that of the conventional example shown in FIG.

In FIG. 10, in the steel tank 200, A is a closed container at the lower end, B is a container with an open lower end, and the periphery of the central tank B is completely covered by the storage container C. The pipe 41 communicates with the pipe 41, and the pipe 41 is connected to a tank (CA) 42 at the water surface. A pipe 40 extends from the tank (CA) 42 into the water and is open. Other tanks A and B are used as cushion tanks or air storage tanks. The relationship between the valve V and the water flow is the same as in FIG. 8, but illustrates the direction a.

From the vicinity of the tank A in the steel tank 200 on the sea floor, a pipe 43 is provided upright toward the water surface.
It is connected to a steam-water separation tank (SEP) 45 on the ground. An air lift nozzle N is connected to the air reservoir 211 of the tank A via a control valve VA and a pipe 44, and the nozzle N is inserted into the pipe 43 from the open end of the seawater of the pipe 43. Further, an air turbine T is connected to the steam-water separation tank (SEP) 45 so that the generator is driven by air.

In the ninth embodiment having the above structure, the air flow a from the pipe 203 is
The air flows into the tank 11 and pushes the water in the tank B into the pipe 41. The water flow a closes the flow path switching valve V and turns the tank (CA).
Water is sent to 42. The air flow b from the pipe 203 is the tank 2
Since the compressed air is taken out from the air pool 211 in 00, the water level in the tank rises. At this time, if the communication with the sea bottom is closed, the flow path switching valve V passes through the pipe 41 into the tank and takes in the water flow b from the water in the pipe 40 via the tank (CA) 42. At this time, if the descending flow in the pipe 41 is strong, the pressure in the tank (CA) 42 becomes negative, and the suction of the water flow b from the pipe 40 increases. The water flow b at this time is also in the tank (C
A) It can be used on the ground from within 42.

The wake water W generated in the vicinity of the tank A is transmitted through the pipe 43, and is separated from a steam-water separation tank (SEP) 45 on the ground.
And the tank 45 is pressurized, so that the inflowing water flow is used in the facilities on the ground. Furthermore, the air pocket 21 in the tank A
The compressed air in 1 is guided from the control valve VA to the pipe 43 from the air lift nozzle N via the pipe 44, separated from water in the steam separator tank (SEP) 45, and rotates the air turbine T to be recovered as power. Is done.

As described above, in the tenth embodiment, in addition to the conventional compressed air storage combined power generation system shown in FIG. 13, the water flow flowing out and in from the submarine tank 200 is used, and the tank is used in conjunction with the water flow. Air pocket 21 in 200
Since the power is recovered by the air turbine T using a part of the compressed air in the air turbine 1, the air flow and the water flow are effectively used.

[0065]

According to the present invention, there is provided a compressed air storage combined cycle system comprising: (1) an upper regulating pond, a lower regulating pond having a closed structure having an air reservoir in an upper portion, and a space between the upper regulating pond and the lower regulating pond. A pump turbine generator that is connected to and pumps water from the lower regulating pond to the upper regulating pond, and that generates electricity by water falling from the upper regulating pond to the lower regulating pond, and is compressed by the air reservoir of the lower regulating pond. And a power generation facility that generates power using the air that has been pumped, and when the water is pumped from the lower regulating pond to the upper regulating pond, the power is driven by an air flow sucked from the atmosphere into the lower regulating pond. The basic configuration is to provide an air turbine. With such a system, when the pump-turbine generator operates as a pump and pumps water from the lower regulating pond to the upper regulating pond, the air sucked from the atmosphere passes through the air turbine and drives the turbine to drive the lower regulating pond. Flows into the air pocket. Therefore, it was not used before,
Power generation can be performed using this suction air flow.
When the pump turbine generator is driven as a generator by water falling from the upper regulating pond to the lower regulating pond, the air flowing into the lower regulating pond compresses the air in the upper air reservoir to generate compressed air. Can be stored, and the compressed air is supplied to a power generation facility, and the original power generation is performed.

According to (2) of the present invention, the compressed air is switched by, for example, a valve and the air turbine is used even when the compressed air is used in the power generation equipment or when the compressed air is not used in the power generation equipment. To drive the air turbine to generate power, thereby expanding the application range of the system.

In (3) of the present invention, the auxiliary equipment of the pump turbine generator is driven by air from the pressure tank, and (4)
According to the invention, since the bypass flow path is provided, when the pump-turbine generator is not driven, water can be directly applied to the lower regulating pond by opening and closing the open / close valve of the water in the upper regulating pond. Can be prevented from becoming a flow path resistance. According to the inventions (3) and (4),
The water stored in the lower regulating pond in the invention of (1) can be effectively used.

(6) The present invention relates to a tank which is installed in water with an air reservoir provided at an upper portion thereof and formed so that the lower water communicates with the water, and a compressor which sends air to the air reservoir of the tank. And a power generation system for generating power using compressed air stored in an air reservoir of the tank, wherein the tank is installed in a submerged rock cavity, and the cavity has a flow passage communicating with water. And a generator driven by the water flow in the flow path is provided in the flow path. (7) In the invention according to the above (6), in the invention according to the above (6), when the generator sends air to the air reservoir in the tank, and when the compressed air from the air reservoir is used in the power generation equipment. Each of them has a configuration capable of generating power. With such a system, not only when the compressor sends air to the underwater tank, but also when the compressed air in the tank is taken out and used by power generation equipment on the ground to generate power, Since the power is generated by the water flow generated in the flow path by the generator installed in the flow path, the water flow that has been conventionally left as it is can be effectively used.

In (8) of the present invention, the air from the air reservoir of the underwater tank is partially stored for pressurization of the pressure tank, and the servomotor is operated with the pressurized water to adjust the flow rate of the underwater generator. Can be adjusted to adjust the flow of water flowing into and out of the generator, thereby easily adjusting the output of the generator.

In (9) of the present invention, the variable flow water flowing out from the flow path in the bedrock is guided to the water surface by the variable water flow path by closing the flow path switching valve, and this variable water can be used in facilities on the ground. Also, the fluctuating water generated when using the compressed air in the tank becomes a water flow in the opposite direction. When the flow path switching valve is opened to the bottom, water enters and exits through the flow path in the rock. Also, (1
According to the invention of (0), in addition to the constitution of the above (9), the flowing water flow accompanying the rise of the water level in the tank is sucked from the variable water flow path which opens near the bottom of the water, returns to the bottom of the water through the water surface and returns to the bottom of the rock. It flows to the channel and raises the water level in the tank. At this time, the flow on the water surface of the variable water flow path can be used as power on the ground.

Further, in the invention of (11), in addition to the constitution of the invention of (10), since a rising / falling water flow path is further provided, the water level in the tank decreases when the compressed air is sent into the tank. The fluctuation of the flowing water, and the fluctuation of the flowing water due to the rise of the water level in the tank when the compressed air in the tank is being taken out, are transmitted to the water surface, and both these flowing waters can be used. Because it is a circulating flow, only the necessary amount of water needs to be used on the ground.

According to a twelfth aspect of the present invention, in the power generation system according to the first aspect of the present invention, the tank comprises a tank having a closed bottom container and a tank having a bottom open container. A container that hermetically covers the whole of the container, a first pipe communicating with the container and extending toward the water surface, a closed tank on the water surface connected to the first pipe, and one end connected to the closed tank A second pipe extending toward the water and having the other end opened in the water; a flow path switching valve provided in the middle of the first pipe to open and close the first pipe underwater; A third pipe that is opened near the tank and extends toward the water surface; and a third pipe that is inserted into the underwater opening of the third pipe and guides a part of the air from the air reservoir of the tank of the lower end closed container to form a bubble. An air lift nozzle that generates As its basic structure and ground steam separator tank is connected to the tube, in that it consists of an air turbine connected to the steam-water separator tank. With such a configuration, the flowing water accompanying the rise in the water level in the tank is supplied through the first or second pipe and enters the closed tank on the surface of the water, and the rise in the water level in the closed tank at this time is used in facilities on the ground. it can. Also, a part of the air in the tank of the lower end closed container flows out from the air lift nozzle as air bubbles into the third pipe, and wake water is sucked in from the underwater opening of the third pipe,
It is led to the upper steam separation tank. In the steam separation tank, this fluctuation of the water flow can be used by external equipment,
The air turbine is driven by the pressurization by the bubbles. As described above, the supply of compressed air into the tank of the conventional compressed air storage and power generation system and the fluctuation water accompanying the outflow of compressed air from the tank can be effectively recovered as power.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an integrated compressed air storage power generation system according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing an underground reservoir and an intake and outlet shown in FIG.

FIG. 3 is a configuration diagram of a combined compressed-air storage power generation system according to a second embodiment of the present invention.

FIG. 4 is a configuration diagram of a combined compressed air storage power generation system according to a third embodiment of the present invention.

FIG. 5 is a configuration diagram of a combined compressed air storage power generation system according to a fifth embodiment of the present invention.

FIG. 6 is a configuration diagram of a combined compressed air storage power generation system according to Embodiment 6 of the present invention.

FIG. 7 is a configuration diagram of a combined compressed air storage power generation system according to a seventh embodiment of the present invention.

FIG. 8 is a configuration diagram of a combined compressed air storage power generation system according to an eighth embodiment of the present invention.

FIG. 9 is a configuration diagram of a combined compressed air storage power generation system according to Embodiment 9 of the present invention.

FIG. 10 is a configuration diagram of a combined compressed air storage power generation system according to Embodiment 10 of the present invention.

FIG. 11 is a configuration diagram of a conventional compressed air storage and power generation system by pumping.

FIG. 12 is a configuration diagram of a conventional compressed air storage and power generation system using an underground tank.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Regulating pond 2 Intake and drain 3,4,6,8,9,10,17 Piping 5 Pump-turbine generator 7 Underground reservoir 7a Water tank 7b Air compressor 11 On-off valve 12,15 Switching valve 13 Air turbine 14 Power generation Machine 16 Silencer 20 Tank 21 CAES power plant 22, 34 Pressure tank 23, 27a, 27b Piping 24, 26, 28 Opening / closing valve 25 Bypass valve 30 Rock 31 Rock inside cavity 32 Channel inside rock 33 Turbine generator 35 Motor 36 Flow rate adjustment Blades 37, 38a, 38b, 39 Flow channels 40, 41, 43, 44 Piping 42 Tank 45 Steam separation tank 200 Steel tank 210 Water 211 Air pool

Continued on the front page F term (reference) 3H074 AA10 AA12 AA13 AA15 AA20 BB10 BB13 BB19 CC29 CC34 CC36 CC38 3H079 AA06 BB10 CC03 DD01 DD23 DD52

Claims (12)

[Claims] 1. An upper regulating pond, a lower regulating pond having a closed structure having an air reservoir in an upper portion, and connected between the upper regulating pond and the lower regulating pond, from the lower regulating pond to the upper regulating pond. It has a pump-turbine generator that generates water by pumping water and water that falls from the upper regulating pond to the lower regulating pond, and a power generating facility that generates electricity using the air compressed by the air reservoir of the lower regulating pond. In the power generation system, when pumping from the lower regulating pond to the upper regulating pond,
An integrated compressed air storage power generation system, comprising: an air turbine driven by an air flow sucked from the atmosphere into an air reservoir of the lower regulating pond. 2. The combined compressed air storage power generation system according to claim 1, wherein the compressed air stored in the air reservoir of the lower regulating pond is used for power generation in the power generation facility, and the air turbine can also be driven. 3. A pressure tank for guiding and storing a part of the air compressed by the air reservoir of the lower regulating pond, wherein an auxiliary machine of the pump turbine generator can be driven by the air of the tank. The combined compressed-air storage power generation system according to claim 1, wherein: 4. A bypass having an on-off valve in parallel with a flow path of water from the lower regulating pond to the pump-turbine generator and bypassing the flow path to communicate the upper regulating pond and the lower regulating pond. The combined compressed-air storage power generation system according to claim 1, wherein a flow path is provided. 5. The lower regulating pond is provided with a system for guiding a part of the stored water as cooling water to a turbine of the power generation facility, and a flow passage for communicating the water cooled by the turbine to the upper regulating pond. 2. A system for connecting to a vehicle is provided.
A combined compressed air storage power generation system according to claim 1. 6. A tank which is installed in water with an air reservoir provided at an upper portion thereof and is formed so that water at a lower portion communicates with the water, a compressor for sending air to the air reservoir of the tank, and air in the tank. In a power generation system having a power generation facility for generating power using compressed air stored in a reservoir, the tank is installed in a cavity in a rock underwater, and a channel is provided in the cavity to communicate with the water, Wherein a generator driven by water flow in the flow path is provided. 7. The power generator performs power generation both when sending air to an air reservoir in the tank and when using compressed air from the air reservoir in the power generation equipment. The combined compressed-air storage power generation system according to claim 6, wherein: 8. A tank connected to a pressure tank for taking in and storing a part of air from an air reservoir, a motor operated by air from the pressure tank, and a flow rate of the generator driven by the motor. The combined compressed air storage power generation system according to claim 6, further comprising a regulating blade. 9. A flow outlet provided in the cavity in the rock is connected to a variable water flow path extending to the ground, and a connecting portion between the variable water flow path and a flow path communicating with the cavity is provided in the cavity. 7. A flow path switching valve for connecting a flow path provided to one of a water bottom and the variable water path is provided.
A combined compressed air storage power generation system according to claim 1. 10. The combined compressed air storage power generation system according to claim 9, wherein the variable water flow path is turned back on the ground side, disposed again under water, and opened near the bottom of the water. 11. A connecting portion between the flow path provided in the cavity in the rock and the variable water flow path extends toward the water surface via the flow path switching valve, and communicates with the variable water flow path at the water surface. The rising fluctuation water flow path is connected, and a connection part of the rising flow fluctuation water flow path through the flow path switching valve is provided with a water discharge control valve for opening and closing between the rising flow fluctuation water flow path and the bottom. The combined compressed-air storage power generation system according to claim 10, characterized in that: 12. A tank which is installed in water with an air reservoir at an upper portion thereof and is formed so that water at a lower portion communicates with the water, a compressor for sending air to the air reservoir of the tank, and an air in the tank. In a power generation system having a power generation facility that generates power using compressed air stored in a reservoir, the tank is configured by a tank having a closed bottom container and a tank having a bottom open container, and the entire tank of the bottom open container is provided. A storage container that is sealed and covered, a first pipe communicating with the storage container and extending toward the water surface, a sealed tank on the water surface connected to the first pipe, and one end connected to the sealed tank to be submerged. A second pipe extending toward the other end and opening in the water, a flow path switching valve provided in the middle of the first pipe to open and close the first pipe underwater, and a tank close to the lower end closed container near the tank. Opening,
A third pipe extending toward the water surface, and an air lift nozzle that is inserted into the underwater opening of the third pipe and guides a part of air from an air pool of a tank of the lower end closed container to generate bubbles. , A combined air-water storage power generation system comprising: a ground-based water / water separation tank connected to the third pipe; and an air turbine connected to the air / water separation tank.