JPH04121424A - air storage power plant - Google Patents

Abstract

PURPOSE:To increase power generation amount per unit air flow rate by storing air compressed by the use of excessive power in an air storage tank with a low temperature and a constant pressure, extracting and supplying to a combustor of a gas turbine the compressed air with a low temperature and a constant pressure under a condition of power shortage. CONSTITUTION:A pneumatic compressor 1 is rotationally driven by means of a generator 2 serving as a motor under a condition of excessive power such as a nighttime or a holiday. Air is introduced from an air introduction tube 9 of the air compressor 1 and compressed. The resultant compressed air is fed to an air storage tank 8 through an air pipeline 10, and stored therein temporarily. The compressed air stored in the air storage tank 8 is cooled by sea water 10 inside/outside the air storage tank 8 so that the temperature thereof is decreased, while its pressure is kept constant by the hydraulic pressure of the sea water 19. Under a condition of power shortage such as a daytime, the compressed air having a low temperature and a constant pressure stored in the air storage tank 8 is fed to a boost compressor 3 through air pipelines 10, 12 and a valve 13, afterward, supplied to a combustor 4 as combustion air through an air pipeline 14.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to an air storage power generation method and an air storage power generation plant, and particularly relates to an air storage power generation method and an air storage power generation plant. This invention relates to a storage power generation method and an air storage power generation plant.

[Conventional technology] The conventional technology of this type of power generation technology includes energy resources vo
1.9 Ha 3 (1988) Special feature Energy transport and storage Energy storage using seawater (Kenji Horii,
Written by Iwao Miyaji) (hereinafter referred to as "First Technical Data"),
JP-A-56-148626 (hereinafter referred to as "second technical data"), JP-A-61-46423 (hereinafter referred to as "third technical data"), JP-A-62-29
Publication No. 8623 (hereinafter referred to as "Fourth Technical Data")
, Japanese Patent Application Laid-Open No. 63-65131 (hereinafter referred to as JP-A-63-65131).

``Fifth Technical Data''), JP-A-63-2086
27 (hereinafter referred to as the "sixth technical data"), Japanese Patent Application Laid-Open No. 63-212724 (hereinafter referred to as the "seventh technical data"), and the like.

The first technical document discloses an air storage power generation plant using a gas turbine, and this air storage power generation plant is designed to eliminate the imbalance between day and night power usage and equalize the load, depending on the location conditions. It is expected to be an alternative to pumped-storage power generation, which is subject to restrictions. The conventional air storage power generation plant utilizes surplus electricity at night, drives an air compressor with a motor, pressurizes the air, and stores it in an air storage tank. The high-pressure air in the air storage tank is used to combust fuel and generate electricity using a gas turbine. At the Huntorf power plant in West Germany, approximately 300,000 cavities are created in a rock salt layer 700 meters underground to store air at a maximum pressure of 70 atmospheres, and this air can be used to generate 290 MW of electricity for two hours.

In Japan, it is not possible to use rock salt cavities or natural cavities,
The use of artificial cavities and underwater air tanks is being considered.

Although these require large-scale construction, they can apply a constant water pressure equivalent to the head and keep the pressure in the stored air constant, making it possible to realize an efficient storage system.

The second technical document states that surplus electricity is used to operate an air compressor, the resulting compressed air is stored in a compressed air underwater storage device that uses seawater pressure, and when necessary, the compressed air is stored underwater. A peak power generation system is disclosed that extracts compressed air from a storage device and supplies the compressed air to a gas turbine power generation system.

The third technical document includes a motor generator that is driven by surplus power, an air compressor that is driven by the motor generator to produce compressed air when the surplus power is generated, and an air compressor that produces compressed air when the demand for electricity increases. An air expansion turbine that takes in electricity to generate power and generates electricity, and an air expansion turbine that is installed underwater and stores the compressed air from the air compressor when surplus electricity is generated, and when electricity demand increases, the compressed air is transferred to the air expansion turbine. A telescoping peak load power generation facility is disclosed.

The fourth technical document includes a compressed air storage tank connected to the inlet of the gas turbine/air compressor via a control valve, and a motor/generator connected to the main shaft of the gas turbine/air compressor. An air storage power generation device is disclosed.

The fifth technical document states that air compressed by an air compressor is cooled by an intercooler and aftercooler, the exhaust heat from the intercooler and aftercooler is stored as hot water in a heat storage device, and when generating electricity, the heat of the heat storage device is stored in a hydrogen storage device. An accumulator power generation device is disclosed that supplies hydrogen, extracts hydrogen, preheats the hydrogen, and supplies it to a combustor as fuel.

The sixth technical document states that after the air compressed by an air compressor is cooled in a heat storage tank, it is stored as high-pressure air in a storage device, and when peak power is required, the high-pressure air is guided from the storage device to the heat storage tank. , is supplied to the combustor as combustion air, and the combustion gas that has become high temperature and high pressure in the combustor is supplied to the gas turbine and generator, and the thermal energy discharged from the intercooler of the air compressor is also transferred to the heat storage device. A recovering air storage gas turbine system is disclosed.

The seventh technical document describes a system in which a balance weight installed on the seabed and a compressed air storage tank with an opening at the bottom are connected by a chain, and a machine room floating on the sea surface has a power transmission and reception device and an air compressor. A compressed air storage device for power storage is disclosed, in which a compressed air pipe is arranged between the compressed air storage tank and the compressed air storage tank.

[Problems to be Solved by the Invention] By the way, in order to realize a power generation plant that uses stored compressed air, a large capacity air storage tank for storing compressed air is required. In Europe and America, it is relatively easy to construct strong cavities within natural underground rock salt layers, but in Japan, where there is no natural underground rock salt layer, it is difficult to construct strong cavities equivalent to large-capacity air storage tanks. Can not. Therefore, there is a problem that the technology disclosed in the first technical document is not suitable for Japan.

In response, proposals have been made to take advantage of Japan's characteristics of being surrounded by the sea and to utilize seawater pressure to construct air storage tanks in underground tunnels or undersea tanks. With these technologies that utilize water pressure, it is possible to always apply a pressure equal to the difference in water head to the stored air, and increasing the pressure increases the amount of energy stored per volume of light, but requires a head or water depth equivalent to the pressure. . For example, to obtain an air pressure of 10 kg/cd in an air storage tank, it is necessary to construct the air storage tank at a depth of 100 m. Increasing the air pressure in the air storage tank can increase the amount of air stored, but the water depth will be deeper, construction work will be more repetitive, and costs will increase. Also, since water depth is related to distance offshore, increasing water depth increases the distance between the power plant and the air storage tank, increasing pressure loss during air flow.

Therefore, the conventional techniques disclosed in the second to seventh technical documents have the following problems.

■ In the conventional technology, which does not include a special pressurizing means for increasing the pressure of the air in the air storage tank, the amount of electricity generated by the gas turbine per unit air flow rate is small.

■ With conventional technology, which involves installing an air storage tank deeper into the water and pressurizing it using water pressure, installation of the air storage tank requires construction work, equipment to forcefully feed compressed air to the air storage tank, and equipment to pump compressed air from the air storage tank. The equipment to take out the compressed air will be large-scale.

■ Conventional technology in which a pressure accumulator is installed to store the pressure discharged from the power generation equipment and pressurize the compressed air taken out from the air storage tank is not necessarily advantageous as it complicates piping, increases construction costs, etc. .

A first object of the present invention is to provide an air storage power generation method that can increase the amount of power generated per unit air flow rate.

A second object of the present invention is to provide an air storage power generation plant that can accurately carry out the method described above with simple equipment.

Furthermore, a third object of the present invention is to provide an air storage power generation plant that can operate continuously from times of power surplus (nighttime, holidays, etc.) to times of power shortage (daytime).

Furthermore, a fourth object of the present invention is to provide an air storage power generation system that can supply high-pressure combustion air from an air storage tank to a gas turbine combustor without the need for a special boost compressor by combining with a pumped storage power plant. The goal is to provide plants.

A fifth object of the present invention is to provide an air storage power generation plant that can generate electricity even more efficiently.

[Means for Solving the Problems] The first object is to adjust compressed air to a low temperature and a constant pressure while storing it in an air storage tank using surplus electric power, and to adjust the compressed air to a constant pressure at a low temperature when there is a power shortage. This is achieved by taking compressed air at constant pressure, actively pressurizing it, and supplying the high pressure compressed air to the combustor of the gas turbine.

The second purpose is to provide the motor/generator with an air compressor that compresses air using surplus electricity, and install an air storage tank to store the compressed air underwater. In an air storage power generation plant that extracts and supplies compressed air from the storage tank to a combustor of a gas turbine connected to a gas turbine, the compressed air is further actively compressed between the motor/generator and the gas turbine. A boost compressor is installed to be detachable from the motor/generator, and the inlet of the boost compressor and the air storage tank are connected by an air pipe having a valve, and the outlet of the boost compressor and the combustor are connected. This is achieved by connecting the inlet with the air piping.

Furthermore, the third purpose is to install a generator in place of the motor/generator, connect the air compressor to one shaft of the generator, and connect the boost compressor to the other shaft. This is also achieved by providing an air storage tank bypass between the air compressor and the boost compressor.

Furthermore, the fourth purpose is to install a closed air storage tank that stores compressed air using surplus electricity, and to install a pumped storage power plant and a lower pond driven by the surplus electricity in this air storage tank. A pumped storage power generation plant with an upper pond and an upper pond.
Achieved by connecting the lower reservoir and the upper reservoir separately through water piping each having a valve, and directly connecting the inlet of the combustor of the gas turbine to the air storage tank through an air piping having a valve. be done.

A fifth purpose is to add cooling water to the compressed air in at least one of the steps of storing compressed air in the air storage tank, storing the compressed air, and taking out the compressed air from the air storage tank. This is achieved by providing a spray device for spraying and further by connecting at least one stage of a reheater and a reheat gas turbine to the gas turbine.

[Effect: In general, when compressing air with an air compressor, the power per unit air flow rate W (kcal/kg/s)
is the pressure ratio r, the polytropic index n, the air compressor inlet temperature Ti (K), and the specific heat at constant pressure Cp (kcal/
kg/K), W=TiX(r −1)XCp −(1
). As is clear from equation (1), in order to obtain the same pressure ratio, lowering the inlet temperature of the air compressor requires less power.

Therefore, in the invention according to claim 1 of the present invention, compressed air that is compressed using surplus electric power and stored in an underwater air storage tank is adjusted to a low temperature and a constant pressure while being stored in the air storage tank. That's what I do. With this, when compressed air is taken out from the air storage tank and sent to the boost compressor that further compresses the compressed air, the boost compressor is supplied with compressed air at a lower temperature, so if the same pressure ratio is obtained. Less power is required for this purpose, and the output of the gas turbine can be increased if the boost compressor is operated with the same amount of power used.

Furthermore, in the invention according to claim 1 of the present invention, when there is a power shortage, the compressed air taken out from the air storage tank is further positively pressurized to supply high-pressure compressed air to the combustor of the gas turbine. ing. This makes it possible to increase the power of the gas turbine.

Therefore, according to the first aspect of the present invention, it is possible to increase the amount of power generated per unit air flow rate.

Further, in the invention according to claim 2 of the present invention, a motor/generator, an air compressor connected to the motor, an air storage tank installed underwater and connected to the air compressor, and a motor/generator connected to the motor/generator. It includes a boost compressor that is removably connected to a generator, a gas turbine that is connected to the motor/generator, and a combustor that is connected to the boost compressor and the gas turbine.

For example, when there is a surplus of electricity at night or on holidays, the boost compressor and gas turbine are disconnected from the motor/generator, and the motor/generator is used as the motor for the air compressor to drive the air compressor and generate the air. A compressor compresses air, and the compressed air is sent to an air storage tank installed underwater for storage. The air storage tank is preferably installed as deep under the sea as possible.

The air storage tank uses the temperature and pressure of the surrounding water to adjust the compressed air to a low temperature and constant pressure.

Next, when there is a power shortage, such as during the daytime, the air compressor is disconnected from the motor/generator, and the boost compressor and gas turbine are connected to the motor/generator.

Next, the boost compressor is driven by the motor/generator, and the low temperature, constant pressure compressed air stored in the air storage tank is taken out and the compressed air is sent to the boost compressor.

The boost compressor further actively pressurizes the compressed air and supplies it as high-pressure combustion air to the combustor of the gas turbine.

In the combustor, separately supplied fuel and the high-pressure combustion air are combusted, and the combustion gas is supplied to the gas turbine.

The gas turbine converts the thermal energy of the combustion gas into mechanical energy to rotationally drive the motor/generator, and the motor/generator operates as a generator;
Generate electricity.

Therefore, according to the second aspect of the present invention, the method of the present invention can be implemented accurately. Also,
A boost compressor installed between the motor/generator and the gas turbine actively pressurizes the compressed air taken out from the air storage tank and supplies it to the gas turbine's combustor. Equipment for converting air into high-pressure combustion air can be simplified. Moreover, in the process of compressing the compressed air with the boost compressor, the temperature of the compressed air rises, so it is possible to supply high-pressure and heated combustion air to the combustor of the gas turbine. The combustion efficiency can be increased and the power of the gas turbine can be increased.

Furthermore, in the invention according to claim 3 of the present invention, a generator is installed in place of the motor/generator, an air compressor is connected to one shaft of the generator, and a boost compressor is connected to the other shaft. are connected. Further, an air storage tank bypass is provided between the air compressor and the boost compressor.

In the invention as claimed in claim 3, the generator is operated all the time, and when there is a surplus of power, a part of the compressed air is bypassed from the air compressor to the boost compressor. The system sends the minimum amount of air necessary to drive the aircraft and gas turbine, and sends the rest of the compressed air to an air storage tank installed underwater for storage.

Next, when there is a power shortage, all the compressed air generated by the air compressor is sent from the air compressor to the boost compressor via a bypass, and at the same time, the compressed air stored in the air storage tank is also taken out and sent to the boost compressor. .

As a result, when there is a power shortage, a large amount of high-pressure compressed air is supplied from the boost compressor to the combustor as combustion air, and as a result, a large amount of combustion gas is supplied from the combustor to the gas turbine, increasing the amount of power generation.

Therefore, in the invention as claimed in claim 3, the generator is constantly operated without stopping, and compressed air is stored in the air storage tank using surplus power, and the compressed air is used to generate electricity when there is a power shortage. It is possible to increase the amount.

In the invention according to claim 4 of the present invention, a motor/generator, an air compressor connected thereto, and a closed air storage tank installed underwater and connected to the air compressor, A gas turbine connected to the motor/generator, a combustor connected to the air compressor and the gas turbine, a pumped storage power plant, a lower pond, and an upper pond, and the lower pond and the upper pond are connected to each other. (It is equipped with a pumping plant separately connected to the air storage tank, and is not equipped with a boost compressor.)
.

In the invention according to claim 4, when there is surplus electric power, the motor/generator is used as a motor for the air compressor, and the motor/generator drives the air compressor to compress the air.
The compressed air is sent to an air storage tank for storage.

When compressed air is fed into the air storage tank and the internal pressure increases, water in the air storage tank is pushed up into the lower pond of the pumped storage power plant.

On the other hand, the surplus electricity drives a pumped storage power plant to pump water from the lower pond to the upper pond.

As mentioned above, when the internal pressure of the air storage tank increases, that pressure pushes the water inside the air storage tank to the lower pond, so the compressed air inside the air storage tank is adjusted to a constant pressure, and the compressed air The temperature is controlled by the water surrounding the air storage tank.

Then, when there is a power shortage, the air compressor is disconnected from the motor/generator. It also extracts compressed air from the air storage tank and supplies the compressed air to the combustor of the gas turbine. At this time, water is drained from the upper pond of the pumped storage power plant, some of the water is sent to the lower pond, and the other part is sent to the air storage tank. The pressure of the water sent from the upper pond to the air storage tank pressurizes the compressed air in the air storage tank. Thereby, high-pressure compressed air is supplied from the air storage tank to the combustor as combustion air.

In this operating state, the motor/generator functions as a generator, is rotationally driven by the gas turbine, and generates electricity.

Therefore, according to the fourth aspect of the invention, even if the boost compressor is omitted, the combination of the air storage tank and the pumped storage power plant can supply high-pressure compressed air to the combustor of the gas turbine during power shortages. It is possible to increase the output of the gas turbine and increase the amount of power generation.

In addition, in the invention described in claim 5 of the present invention, since cooling water is sprayed onto the compressed air by the spray device, the temperature of the compressed air can be lowered, and the compressed air is placed in the air storage tank accordingly. It becomes possible to store large amounts of. Moreover, by spraying the cooling water, the compressed air is further cooled, and when the low-temperature compressed air is supplied to the boost compressor, the efficiency of the boost compressor can be further improved, and even more. It is possible to increase the amount of power generated during power shortages.

Furthermore, in the invention described in claim 6 of the present invention, the reheater and the reheat gas turbine are connected to the gas turbine, and the gas turbine equipment is connected in multiple stages, so that the power generation efficiency can be further improved. can.

[Example] Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a system diagram showing a first embodiment of an air storage power generation plant for carrying out the method of the present invention.

In this first embodiment, a double-shaft motor/generator 2,
An air compressor 1 is removably connected to one shaft of the motor/generator 2 via a clutch 6, and an air compressor 1 is removably connected to the other shaft of the motor/generator 2 via a clutch 7. a boost compressor 3, a gas turbine 5 drivingly connected to the motor/generator 2 via the boost compressor 3, a combustor 4 for the gas turbine, and an air storage tank 8 installed underwater. It is composed of:

An air intake pipe 9 is connected to the inlet of the air compressor 1.

The air storage tank 8 is installed in a deep part of the seawater 19 in this embodiment. At the bottom of this air storage tank 8, a passage 8a for entering and exiting seawater is provided. The air storage tank 8 and the outlet of the air compressor 1 are connected by an air pipe 10 having a valve 11.

An air pipe 10 connecting the air compressor 1 and the air storage tank 8 and the inlet of the boost compressor 3 are connected by an air pipe 12 having a valve 13.

The boost compressor 3 is an air compressor that further actively pressurizes the compressed air sent from the air storage tank 8 when there is a power shortage.

The outlet of the boost compressor 3 and the inlet of the combustor 4 are connected by an air pipe 14. In addition, the combustor 4
A fuel supply pipe 15 having a fuel control valve 16 is connected to the inlet of the fuel supply pipe 15 . Further, the outlet of the combustor 4 and the inlet of the gas turbine 5 are connected by a combustion gas passage 17.

An exhaust pipe 18 is connected to the outlet of the gas turbine 5.

An example of the method of the present invention will be explained in connection with the operation of the air storage power generation plant of the first embodiment.

First, when there is surplus power at night or on holidays, the clutch 6 is engaged, the air compressor 1 is connected to the motor/generator 2, the clutch 7 is removed, and the motor/generator 2 is connected to the boost compressor 3 and gas turbine 5. Separate. Additionally, the valve 11 of the air pipe 10 connecting the inlet of the air compressor 1 and the air storage tank 8 is opened, and the valve 13 of the air pipe 12 connecting the air pipe 10 and the inlet of the boost compressor 3 is opened. Keep it closed.

That is, the motor/generator 2 is used as the motor of the air compressor 1, and the air compressor 1 is rotationally driven by the motor/generator 2.

When the air compressor 1 is driven to rotate, the air compressor 1 takes in air through the air intake pipe 9 and compresses the air using surplus electric power. Then, the compressed air compressed by the air compressor 1 is sent to the air storage tank 8 through the air pipe 10, and is stored in the air storage tank 8.

The air storage tank 8 is installed deep in the seawater 19 and has a passage 8a for entering and exiting the seawater.
When compressed air is forced into the air storage tank 8, the seawater 19 inside the air storage tank 8 is released to the outside through the passage 8a. In addition, the compressed air stored in the air storage tank 8 is
The seawater around the air storage tank 8, that is, the seawater 19 inside and outside the air storage tank 8, cools the air to a low temperature.
And the pressure is adjusted to a constant level by the water pressure of the seawater 19.

In this way, the compressed air in the air storage tank 8 is adjusted to a low temperature and constant pressure.

Next, when there is a power shortage such as during the daytime, the clutch 6 is removed and the air compressor 1 is disconnected from the motor/generator 2. Also, the valve 11 of the air pipe 10 connecting the outlet of the air compressor 1 and the air storage tank 8 is closed. Furthermore, the clutch 7 is applied to connect the motor/generator 2 to the boost compressor 3 and the gas turbine 5.

Next, the valve 13 of the air pipe 12 connecting the air pipe 10 and the inlet of the boost compressor 3 is gradually closed and controlled to an appropriate opening degree. As a result, the low temperature and constant pressure compressed air stored in the air storage tank 8 is transferred to the air pipe 10.1.
2 and valve 13 to the boost compressor 3.

The boost compressor 3 further actively pressurizes the compressed air sent from the air storage tank 8, and compresses the compressed air into the combustor 4 through an air pipe 14 connecting the outlet of the boost compressor 3 and the inlet of the combustor 4. high-pressure compressed air is supplied as combustion air to the Here, since low-temperature compressed air is sent to the boost compressor 3, as can be seen from equation (1) above, less power is required to obtain the same pressure ratio, and with the same power used, the pressure ratio will increase. be able to. In addition, in the process of pressurizing compressed air by the boost compressor 3,
The temperature of compressed air increases. Therefore, compressed air at high pressure and temperature is supplied from the boost compressor 3 to the combustor 4 .

When the compressed air is taken out from the air storage tank 8, seawater 1 is introduced into the air storage tank 8 through the seawater inlet/outlet passage 8a.
9 is infiltrated. Therefore, the inside of the air storage tank 8 is maintained at a constant pressure, and the compressed air stored therein is also maintained at a constant pressure.

The combustor 4 is supplied with combustion air from the boost compressor 3 through an air pipe 14, and at the same time, fuel is supplied through a fuel supply pipe 15 and a fuel control valve 16,
Fuel and combustion air are combusted in the combustor 4 to generate combustion gas. At this time, since high pressure and heated combustion air is supplied from the boost compressor 3 to the combustor 4,
The combustion efficiency of the combustor 4 can be improved, and high-temperature, high-pressure combustion gas can be generated.

The combustion gas generated in the combustor 4 is passed through the combustion gas passage 1
7 and is supplied to the cast turbine 5.

This gas turbine 5 converts the thermal energy of combustion gas into mechanical energy and outputs it.

As a result, the motor/generator 2 is driven by the gas turbine 5 via the boost compressor 3, and the motor/generator 2 operates as a generator to generate electricity, which is used as a power source in times of power shortage. .

Note that the exhaust gas from the gas turbine 5 is discharged through the exhaust pipe 18 and treated.

FIG. 2 is a diagram comparing the performance of the prior art and the first embodiment of the present invention with respect to an air storage power generation plant.

In this Figure 2, the calculation conditions are: gas turbine inlet temperature 1000°C, air compressor and boost compressor polytropic efficiency 86%, gas turbine polytropic efficiency 87%, constant pressure specific heat of air 0.24 kcal.
/kg" C1 specific heat ratio = 1.4, the constant pressure specific heat of the combustion gas is 0.27 kcal/kg" C1 specific heat ratio = 1.33, the outside air temperature is 20° C., and the fuel is natural gas.

The air storage tank is placed at a depth of 100m (internal pressure: 10kg/cd)
), the air temperature in the air storage tank is 20°C, and the combustor pressure is varied from 10 to 40 kg/ad.

Also, in the prior art, air in the air storage tank is directly flowed into the combustor.

The upper row in FIG. 2 shows the efficiency ratio between the prior art and the first embodiment of the present invention, and the lower row shows the output ratio between the prior art and the first embodiment of the present invention.

In an air storage power generation plant, it is necessary to obtain more electric power from the same amount of stored air, and a combustion pressure that increases the output ratio should be selected. The optimum value for the pressure ratio of the boost compressor varies depending on equipment efficiency, turbine inlet temperature, etc., but as shown in FIG. 2, a value of about 2.5 or more is suitable.

In the first embodiment of the present invention, compressed air is actively pressurized by the boost compressor 3 and supplied to the combustor 4, so that the combustion pressure increases. As the combustion pressure increases,
The output of the gas turbine 5 increases. As the output of the gas turbine 5 increases, the driving force of the boost compressor 3 also increases, so the pressure ratio of the boost compressor 3 is set to the optimum value for the power generation output, that is, approximately 2.5 or more as shown in FIG. is maintained.

Furthermore, according to the first embodiment, the temperature of the compressed air increases during the process of pressurizing the compressed air by the boost compressor 3, so combustion air with increased temperature can be supplied to the combustor 4. , thus increasing combustion efficiency and reducing fuel consumption.

Moreover, in this first embodiment, the compressed air taken from the air storage tank 8 is sent to the boost compressor 3 and directly pressurized, so that the equipment can be simplified.

Next, FIG. 3 is a system diagram showing a second embodiment of the present invention.

In this second embodiment, an air compressor 1 is directly connected to one shaft of a motor/generator 2.

Further, the outlet of the air compressor 1 and the air storage tank 8 installed in the seawater 19 are connected by an air pipe 20 having a check valve 21.

Further, the air storage tank 8 and the inlet of the boost compressor 3 are connected by a pipe 22 having a valve 23.

The other configuration of this second embodiment is the same as that of the first embodiment.9 In the air storage power generation plant of this second embodiment, the air compressor 1 is powered by the motor/generator 2. It is constantly driven in rotation.

When there is surplus power, the clutch 7 is removed, the boost compressor 3 and the gas turbine 5 are disconnected from the motor/generator 2, and the valve 23 of the air pipe 22 is closed.

In this state, the motor/generator 2 acts as a motor for the air compressor 1, and as the air compressor 1 is rotationally driven by the motor/generator 2, the air taken in from the air intake pipe 9 is compressed. The compressed air is sent to and stored in the air storage tank 8 through the air pipe 20 and the check valve 21, and is adjusted to a low temperature and constant pressure compressed air within the air storage tank 8.

Then, when there is a power shortage, the clutch 7 is engaged, and the motor/generator 2 is connected to the boost compressor 3 and the gas turbine 5. Further, the valve 23 of the air pipe 22 is gradually opened and controlled to an appropriate opening degree.

When the boost compressor 3 is rotationally driven by the motor/generator 2 in this state, compressed air is taken out from the air storage tank 8, and the compressed air is sent to the boost compressor 3 through the air pipe 22 and valve 23, and the boost Compressor 3
The fuel is positively pressurized and supplied to the combustor 4 of the gas turbine 5.

In this operating state, the motor/generator 2 is driven by the gas turbine 5 and acts as a generator that generates electricity.

In this second embodiment, since the compressed air stored during the power surplus is used when there is a power shortage, it is possible to flow the flow rate to the boost compressor 3 and the combustor 4 that exceeds the capacity of the air compressor 1. , thus increasing the output. on the other hand,
Since the air compressor 1 continues to operate, one power generation time becomes longer, and the air storage tank 8 performs intermediate cooling in terms of the cycle.

According to this second embodiment, by performing intermediate cooling during the air storage process, the driving force for further compressing the compressed air can be reduced.

Other functions of this second embodiment are similar to those of the first embodiment.

Next, FIG. 4 is a system diagram showing a third embodiment of the present invention.

This third embodiment includes a spray device that sprays cooling water onto compressed air.

The spray device includes a pump 24 and a spray pipe 25.
and a spray nozzle 26 connected to the spray pipe 25 and inserted into the air storage tank 8.

This spray device uses the pump 24 to pump up seawater 19 as cooling water and supplies it to a spray nozzle 26 through a spray pipe 25.

The spray nozzle 26 sends the cooling water to the air storage tank 8.
spray on the compressed air inside the tank to actively lower the temperature of the compressed air.

As a result, the amount of compressed air stored in the air storage tank 8 can be increased, and the boost compressor 3 can be used in the event of power shortage.
It becomes possible to supply even lower temperature compressed air to the inlet of the

Note that the spraying of cooling water on compressed air is not limited to the stage where compressed air is stored in the air storage tank 8, but also the stage in which compressed air is sent from the air compressor 1 into the air storage tank 8, or when the compressed air is sent to the air storage tank 8. The step of extracting compressed air from 8 may be any step, or may be performed in a plurality of steps.

Further, another configuration 1 effect of this third embodiment is that the first
This is similar to the embodiment.

Next, FIG. 5 is a system diagram showing a fourth embodiment of the present invention.

In this fourth embodiment, a reheater 27 and a reheat gas turbine 28 are connected to the rear stage of the gas turbine 5.

The outlet of the gas turbine 5 and the inlet of the reheater 27 are connected by a reheat gas pipe 29. Also.

A reheater fuel supply pipe 30 having a reheater fuel control valve 31 is connected to the inlet of the reheater 27 .

The reheat gas turbine 28 is connected to the gas turbine 5 via a shaft, and is connected to the reheater 2 through a reheat gas passage 32.
It is tied to 7. Furthermore, an exhaust pipe 33 is provided at the outlet of the reheat gas turbine 28.

In this fourth embodiment, in addition to the output of the gas turbine 5, the reheat gas discharged from the gas turbine 5 is used to drive the reheat gas turbine 28 when there is a power shortage.

Since the output is obtained, the turbine output can be further increased and power generation efficiency can be further improved.

Note that the other configuration 9 effect of this fourth embodiment is the same as that of the first embodiment.
This is similar to the embodiment.

Furthermore, FIG. 6 is a system diagram showing a fifth embodiment of the present invention.

In this fifth embodiment, the air compressor 1 is directly connected to one shaft of a double-shaft generator 34, and the one-stroke compressor 3 is directly connected to the other shaft.

The outlet of the air compressor 1 and the air storage tank 8 are connected by an air pipe 35. Further, the outlet of the air compressor 1 and the inlet of the boost compressor 3 are connected to a bypass valve 3.
7 by a bypass 36. Further, the inlet of the boost compressor 3 and the air storage tank 8 are connected by an air pipe 38 having a valve 39.

The other configurations of this fifth embodiment are the same as those of the first embodiment.

In this fifth embodiment, the generator 34 is constantly driven to rotate.

Further, when there is surplus power, the valve 39 of the air pipe 38 connecting the outlet of the boost compressor 3 and the air storage tank 8 is fully closed. Furthermore, a bypass valve 37 provided in the bypass 36 is used to connect the air compressor 1 to the boost compressor 3 in order to drive the air compressor 1, the boost compressor 3, and the gas turbine 5 with the generator 34 when there is surplus power. Control the opening to supply the minimum necessary amount of compressed air.

In this state, when the air compressor 1 is driven to rotate when there is surplus power, the air compressor 1 is transferred to the boost compressor via the bypass 36.
The above-mentioned minimum amount of compressed air is sent through the bypass valve 37, and all remaining compressed air is sent through the air pipe 35 to the air storage tank 8 and stored therein.

The compressed air sent to the boost compressor 3 is further pressurized by the boost compressor 3, supplied to the combustor 4 through the air pipe 14, and used for the output of the gas turbine 5, which generates electricity. The machine 34 is driven to rotate and generates electricity.

On the other hand, when there is a power shortage, the bypass valve 37 is fully opened, and the valve 39 of the air pipe 38 connecting the air storage tank 8 and the inlet of the boost compressor 3 is gradually opened and then controlled to an appropriate opening degree. Therefore, compressed air is fed to the boost compressor 3 from both the air compressor 1 and the air storage tank 8.

The boost compressor 3 further pressurizes the compressed air, and supplies high-pressure and heated compressed air as combustion air to the combustor 4 through the air pipe 14.

As a result, the output of the gas turbine 5 increases, and the output of the generator 34 increases.
The amount of power generated will increase.

According to this fifth embodiment, by controlling the bypass valve 37 and the valve 39 of the air pipe 38 without stopping the first generator 34, compressed air is stored in the air storage tank 8 when there is surplus power, and the power is When there is a shortage, compressed air can be taken out from the air storage tank 8 to ensure the necessary amount of power generation.

The other functions of this fifth embodiment are the same as those of the first embodiment.

7 is a system diagram showing a sixth embodiment of the present invention.

In this sixth embodiment, one double-shaft type motor/generator 2,
An air compressor 1 is removably connected to one shaft of the motor/generator 2 via a clutch 6, and a gas turbine 5 is removably connected to the other shaft of the motor/generator 2 via a clutch 7. , a combustor 4 that supplies combustion gas to the combustor 4, a closed air storage tank 40, a pumped storage power plant having a pumped storage power plant 41, a lower reservoir 42 and an upper reservoir 43, and a boost compression The machine is not equipped.

An air intake pipe 9 is connected to the inlet of the air compressor 1. Further, the outlet of the air compressor 1 and the air storage tank 40 are connected by an air pipe 44 having a valve 45.

The air pipe 44 and the inlet of the combustor 4 are connected by an air pipe 46 having a valve 47.

On the other hand, a fuel supply pipe 15 having a fuel control valve 16 is connected to the inlet of the combustor 4 . The outlet of the combustor 4 and the inlet of the gas turbine 5 are connected by a combustion gas passage 17. At the outlet of the gas turbine 5, an exhaust pipe 1 is provided.
8 is provided.

On the other hand, the lower pond 42 and the air storage tank 40 are separated by a valve 49.
It is connected by a water pipe 48 having a diameter. The lower pond 4
2 and the pumped storage power plant 41 are connected by a water pipe 50. The pumped storage power plant 41 and the upper pond 43 are connected to a water pipe 51.
connected by. The upper pond 43 and the air storage tank 40 are connected by a water pipe 52 connected to the water pipe 51 and having a valve 53.

Therefore, in the air storage power generation plant of this sixth embodiment, when there is surplus power, the clutch 6 is engaged and the motor/generator 2 is turned on.
The air compressor 1 is connected to the air compressor 1, the clutch 7 is removed, and the motor/generator 2 is operated as the motor of the air compressor 1. In addition, when there is a surplus of electricity, the lower pond 42 and the air storage tank 40
Open the valve 49 of the water pipe 48 connecting the upper pond 43 and the air storage tank 40, and open the valve 5 of the water pipe 52 connecting the upper pond 43 and the air storage tank 40.
Close 3.

In this state, the air compressor 1 is operated by the motor/generator 2.
When the air compressor 1 is driven to rotate, the compressed air compressed by the air compressor 1 is sent to the air storage tank 40 through the air piping 44 and the valve 45, and is stored therein.

This air storage tank 40 contains water 54 from the pumped storage power generation plant, and when the pressure inside the air storage tank 40 increases due to compressed air, the water 54 inside the air storage tank 40
is pushed up into the lower pond 42 through the water pipe 48 and valve 49 and enters the lower pond 42. As the pumped storage power plant 41 operates, the water that has entered the lower pond 42 is lifted to the upper pond 43 through the water pipes 50, 51 and stored in the upper pond 43.

Therefore, the compressed air stored in the air storage tank 40 is always regulated to a constant pressure and is regulated to a low temperature by the water 54.

Next, when the power is insufficient, the clutch 6 is removed, the clutch 7 is engaged, and the motor/generator 2 and the gas turbine 5 are connected.
The motor/generator 2 is used as a generator. In addition, the valve 45 of the air pipe 44 is closed, and this air pipe 44 and the combustor 4
Close the valve 47 of the air pipe 46 that connects the inlet of the
Then, control is performed to an appropriate degree. Furthermore, the valve 49 of the water pipe 48 connecting the lower pond 42 and the air storage tank 40 is closed, and the water pipe 5 connecting the upper pond 43 and the air storage tank 40 is closed.
Open the second valve 53.

In this state, the compressed air stored in the air storage tank 40 is taken out and supplied to the combustor 4 through the air pipes 44, 46 and the valve 47.

The combustor 4 is supplied with compressed air as combustion air from an air storage tank 40, and at the same time, fuel is supplied through a fuel supply pipe 15 and a fuel control valve 16. In the combustor 4, the combustion air and fuel are combusted, and the combustion gas is sent to the gas turbine 5 through the combustion gas passage 17.

The gas turbine 5 outputs an output using the combustion gas,
The motor/generator 2 is driven to rotate, and the motor/generator 2 generates electricity.

When the compressed air is taken out from the air storage tank 40, part of the water stored in the upper reservoir 43 flows through the water pipe 51 to the pumped storage power plant 41, performs work and enters the lower reservoir 42, and the other part flows to the pumped storage power plant 41. The water flows through water line 52 and valve 53 to air storage tank 40, pressurizing the compressed air within this air storage tank 40.

Therefore, according to this sixth embodiment, even if the boost compressor is omitted, the combination of the air storage tank 40 and the pumped storage power generation plant can supply high-pressure compressed air from the air storage tank 40 to the combustor 4 as combustion air. It becomes possible to supply the product as

In addition, in the present invention, if necessary and possible, the first to
The techniques of the sixth embodiment may be used in combination.

[Effects of the Invention] According to the invention described in claim 1 of the present invention described above, compressed air that is compressed using surplus electricity and stored in an underwater air storage tank is cooled to a low temperature during storage. When compressed air is taken out from the air storage tank and sent to a boost compressor that further compresses the compressed air, the boost compressor is supplied with low-temperature compressed air. 1) As can be seen from the equation,
It requires less power to drive the boost compressor, which is an air compressor that further pressurizes compressed air, and when there is a power shortage, the compressed air taken out from the air storage tank can be further pressurized and used for combustion in the gas turbine. Since high-pressure compressed air is supplied to the gas turbine, the output of the gas turbine can be increased, which has the effect of increasing the amount of power generated per unit air flow rate.

According to the second aspect of the present invention, the motor/generator is provided with an air compressor that compresses air using surplus electric power, and an air storage tank that stores the compressed air underwater is installed. On the other hand, in an air storage power generation plant that extracts compressed air from the storage tank and supplies it to a combustor of a gas turbine connected to the motor/generator, compressed air is placed between the motor/generator and the gas turbine. A boost compressor for more actively compressing the boost compressor is installed in a detachable manner relative to the motor/generator, and the inlet of the boost compressor and an air storage tank are connected by an air pipe having a valve. Since the outlet of the compressor and the inlet of the combustor are connected by air piping, the method of the present invention can be carried out accurately. By the compressor,
Since the compressed air taken out from the air storage tank is actively pressurized and supplied to the combustor of the gas turbine, it has the effect of simplifying the equipment for converting compressed air into high-pressure combustion air. In the process of compressing the compressed air with the boost compressor, the temperature of the compressed air increases, so high-pressure and heated combustion air can be supplied to the combustor of the gas turbine, resulting in improved combustion efficiency in the combustor. It also has the effect of increasing the output of the gas turbine.

Furthermore, according to the third aspect of the present invention, a generator is installed in place of the motor/generator, the air compressor is connected to one shaft of the generator, and the other shaft is connected to the air compressor. In addition to connecting the boost compressor, a bypass of an air storage tank is provided between the air compressor and the boost compressor, and each part constituting the power generation plant is operated at all times,
When there is a power shortage, all the compressed air generated by the air compressor is sent from the air compressor to the boost compressor via a bypass, and at the same time, the compressed air stored in the air storage tank is also taken and sent to the boost compressor. Therefore, when there is a power shortage, a large amount of high-pressure compressed air is supplied from the boost compressor to the combustor as combustion air, and a large amount of combustion gas is supplied from the combustor to the gas turbine, increasing the amount of power generation. It has the effect of causing

According to the fourth aspect of the present invention, there is provided a motor/generator, an air compressor connected thereto, and a closed air storage tank installed underwater and connected to the air compressor. and a gas turbine connected to the motor/generator, a combustor connected to the air compressor and the gas turbine, a pumped storage power plant, a lower pond, and an upper pond, and the lower pond and the upper pond. and a pumping storage plant connected to the air storage tank separately. Even if the boost compressor is omitted, the combination of the air storage tank and pumped storage power plant can provide high-pressure compression to the gas turbine combustor during power shortages. This has the effect of supplying air, increasing the output of the gas turbine, and increasing the amount of power generation.

Furthermore, according to the fifth aspect of the present invention, since cooling water is sprayed onto the compressed air by the spray device, the temperature of the compressed air can be lowered, and the air storage tank can be filled accordingly. It is possible to store a large amount of compressed air, and the temperature of the compressed air is further reduced by spraying the cooling water, and when the low-temperature compressed air is supplied to the boost compressor, the boost compressor This has the effect of further improving the efficiency of the system and, in turn, increasing the amount of power generated during power shortages.

Furthermore, according to the invention described in claim 6 of the present invention, the reheater and the reheat gas turbine are connected to the gas turbine, and the gas turbine equipment is connected in multiple stages, so that the power generation efficiency can be further improved. effective.

[Brief explanation of drawings]

FIG. 1 is a system diagram showing a first embodiment of an air storage power generation plant for carrying out the method of the present invention, and FIG. 2 is a system diagram showing the air storage power generation plant according to the prior art and the first embodiment of the present invention. 3 to 7 are system diagrams showing second to sixth embodiments of the present invention, respectively. 1...Air compressor, 2...Motor/generator, 3...
・Boost compressor, 4...Combustor, 5...Gas turbine, 6.7...Clutch, 8...Air storage tank, 9...Air intake pipe, 10.12.14...・Air piping, 11.13... Valve, 15... Fuel supply pipe,
16... Fuel control valve, 17... Combustion gas passage, 19
... seawater, 20 ... air piping, 21 ... check valve,
22... Air piping, 23... Valve, 24... Spray device pump, 25... Spray piping, 26...
Spray nozzle, 27... Reheater, 28... Reheat gas turbine, 29... Reheat gas piping, 30... Reheater fuel supply pipe, 31... Reheater fuel control valve , 32...
・Reheat gas passage, 34... Generator, 35... Air piping, 36... Bypass, 37... Bypass valve, 38
... Air piping, 39 ... Valve, 40 ... Air storage tank, 41 ... Pumped storage power plant, 42 ... Lower pond, 43.
...Kamiike, 44.46...Air piping, 45, 47...
・Valve, 48...Water piping, 49...Valve, 50.51.
52...Water piping, 53...Valve, 54...Water. Agent Patent Attorney Tadashi Akimoto Fruitful District Office ゛Yaki, Sanriki (kg/crn”)

Claims (1)

[Claims] 1. Compress air using surplus electricity, store the compressed air in an air storage tank installed underwater, and take out the compressed air from the air storage tank when there is a power shortage and use it. In an air storage power generation method in which the compressed air is supplied as combustion air to the combustor of a gas turbine and used for power generation, the compressed air is adjusted to a low temperature and constant pressure while being stored in an air storage tank, and when there is a power shortage, the compressed air is adjusted to a low temperature and constant pressure. An air storage power generation method characterized by extracting compressed air, actively pressurizing it, and supplying high-pressure compressed air to a combustor of a gas turbine. 2. When there is surplus electricity, a motor/generator is rotated, the air is compressed by an air compressor connected to it, and the compressed air is sent to an air storage tank installed underwater to keep it at a low temperature and constant pressure underwater. In an air storage power generation plant, compressed air is extracted from the storage tank and supplied to a combustor of a gas turbine connected to the motor/generator in the event of power shortage, between the motor/generator and the gas turbine. A boost compressor that compresses compressed air more actively is installed in a removable manner with respect to the motor/generator, and the inlet of the boost compressor and the air storage tank are connected by an air pipe having a valve. An air storage power generation plant characterized in that the outlet of the boost compressor and the inlet of the combustor are connected by air piping. 3. Install a generator in place of the motor/generator, connect the air compressor to one shaft of the generator, connect the boost compressor to the other shaft, and connect the air compressor to the other shaft. 3. The air storage power generation plant according to claim 2, further comprising an air storage tank bypass provided between the air storage tank and the boost compressor. 4. When there is surplus electricity, the motor/generator is rotated, the air compressor connected to this rotates the air, and the compressed air is sent to an air storage tank installed underwater, where it is kept at a low temperature and constant pressure underwater. In an air storage power generation plant that adjusts and supplies compressed air from the storage tank to a combustor of a gas turbine connected to the motor/generator in the event of power shortage, a closed air storage tank is installed;
The lower reservoir and the upper reservoir of a pumped storage power plant that is driven by surplus electricity and has a lower reservoir and an upper reservoir are respectively connected to this air storage tank by water pipes each having a valve, and the An air storage power generation plant characterized in that an inlet of a combustor of a gas turbine is directly connected to an air storage tank via an air pipe having a valve. 5. storing compressed air in the air storage tank;
Any one of claims 2 to 4, further comprising a spray device that sprays cooling water onto the compressed air during at least one of the stages of storing the compressed air and taking out the compressed air from the air storage tank. Air storage power generation plant described in . 6. Claim 2, wherein at least one stage of a reheater and a reheat gas turbine are connected to the gas turbine.
The air storage power generation plant according to any one of to 4.