JPS6019424B2 - Air energy storage, conversion and extraction equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to air energy storage, conversion and extraction devices.

Conventionally, various poems have been made regarding the use of solar energy, and many of them have already been put into practical use.

There are two types of solar energy: solar thermal energy and air energy, and air energy includes wind energy and air thermal energy.

By the way, among these methods, the use of solar thermal energy uses direct solar heat, so it is effective during sunny days.
In addition, when installing a device that can directly extract solar heat, it requires sunny, flat land, and there are certain restrictions on location conditions.

On the other hand, wind energy or air thermal energy has no temporal or locational limitations like solar thermal energy, and is much more universal.Moreover, the thermal energy of water vapor contained in the air reaches the earth's surface. Since it absorbs most of the solar energy, it can be said that it is very effective to utilize this air heat energy effectively. However, although it is known that such use of air energy is advantageous, the current situation is that the development of these uses has not progressed to the point where they are fully put into practical use.

The reason for this is that there is no suitable means for simultaneously utilizing air energy (wind energy, air heat energy) and for storing the obtained energy in a uniform state. Although wind turbine power generation and the like are being carried out as an alternative, it is only used as an emergency power source and has not reached the point where it can be used in daily life. In view of the above, this invention aims to "simultaneously use wind energy and air thermal energy, improve the energy capture efficiency, accumulate the obtained energy with little loss, and store air energy that can be taken out as uniform output at any time. This was made for the purpose of obtaining a conversion and extraction device, and a wind turbine and a wind turbine rotating shaft are used as a driving source, first and second rotary compressors are attached to this rotating shaft, and the first rotation An air supply pipe is connected to the suction side of the compressor via an ejector that selects air from the outside air intake or compressed air reservoir depending on the pressure, and a humidifier that moistens the air from the ejector. A conduit is formed on the side, which connects an air supply pipe to the compressed air reservoir via a heat exchanger and an expansion valve, forming a semi-hermetic air compression circuit as a whole, and The suction side of the compressor is connected to a pipe for feeding the heat medium that has undergone heat exchange in the heat exchanger, and the discharge side is connected to a heat radiation pipe and an expansion valve arranged below the reference water level in the water tank. A heat medium supply pipe leading to the heat exchanger is connected through the pipe, forming a closed hot soot circulation circuit as a whole, and the compressed air reservoir has a tip end separate from the circuit. A branched compressed air take-off pipe is attached, one of the branch pipes is connected to a turbine via an on-off valve, the turbine is attached to the wind turbine rotating shaft via a clutch so that it can be disconnected, and one of the branch pipes is connected to the turbine through a clutch. The other one is configured to be openable to the outside through a check valve and an expansion coil disposed in the water tank by operating an on-off valve.

This invention will be explained below with reference to Examples.

The drawings show a conceptual diagram of the structure of an embodiment of the present invention.

The air energy storage, conversion, and extraction device W of the present invention can be roughly divided into a wind turbine drive section 10 that converts wind energy into rotational energy, an air compression circuit 20 (shown by a solid line) that converts and extracts air thermal energy, and air It consists of a hot soot circulation circuit 30 (indicated by a chain line) for extracting heat energy, and a heat storage section 40 (indicated by a chain line) for storing heat carried by this heating medium.

Hereinafter, the configuration and operation of these will be explained.

The wind turbine section 10 has legs firmly fixed in the ground, a steel frame pedestal 11 that has sufficient structural strength to withstand external forces such as wind pressure and earthquakes, and a height that can capture sufficient wind power. A koji-supported windmill 12 and a rotating shaft 13 of this windmill 12
This rotating shaft 13 is provided with a clutch 14 for connecting/disconnecting rotational transmission as necessary, and this wind turbine rotating shaft 13 is used as a drive shaft, and this shaft 13 is provided with a clutch 14 for connecting and disconnecting rotational transmission. type compressor 21, for example, a screw compressor, and a second
A rotary compressor 31, for example a screw compressor, is installed.

As the wind turbine 12 in the above, a low to high speed wind turbine is appropriately used depending on the installation conditions, but high speed wind turbines tend to stall unless a uniform strong wind (force of 4 to 5 or more) is obtained, and they have poor starting performance. , it is appropriate to use a mid-range wind turbine.

If a medium-speed wind turbine with a blade diameter of 2.0 is used and the wind speed is approximately 5.0/s, the output will be approximately 8.4k9/s.
o grade can be obtained.

Next, on the suction side of the first rotary compressor 21, an air supply pipe 22 is connected to an ejector 25 which selects and supplies air from the outside air intake port 23 or the compressed air reservoir 24 according to either pressure. , and are connected via a humidifying device 26 for humidifying the air from the ejector, and an air supply pipe 29 leading to the compressed air reservoir 24 via a heat exchanger 27 and an expansion valve 28 is connected to the discharge side. A conduit is formed which together forms a semi-closed air compression circuit 20.

In the above, the ejector 25 has an outside air intake port 23.
The air supply pipes are connected so that the direction of air supply from the compressed air reservoir 24 and the direction of air supply from the compressed air reservoir 24 are in the same direction as shown by arrow A, and the air supply is supplied from one of the pipes with the stronger pressure. It is designed to be noticed.

Furthermore, the humidifying device 26 has the overflow pipe 2 at a level position where water constantly drips from the water supply pipe 261 and an air passage is maintained.
62 and a drain 0 card 263 connected thereto is attached.

In this air compression circuit 201, air supplied from either the outside air intake 23 or the compressed air reservoir 24, or both, is compressed by a rotary compressor 21 driven by the wind turbine shaft 13. and circulate within the circuit 20.

At this time, air is compressed on the discharge side of the compressor 21, and the temperature rises. Moreover, this air is
6, the heat capacity is also increased. This high-temperature humidified air enters the heat exchanger 27, exchanges heat with a heat medium to be described later, and is rapidly cooled.

When the air enters the air reservoir 24 via the expansion valve 28, it is further cooled and stored as compressed air in the compressed air reservoir, and a portion of it is again guided toward the ejector 25 via the air pipe and circulated. As a result, the temperature of the air in the compressed air reservoir 24 is gradually lowered, and at the same time, the pressure is increased. In addition, 241 and 291 in the figure are drain traps for water droplets that form in the compressed air reservoir 24 and the air supply pipe 29, and 242
is an on-off valve, and 243 is a safety valve.

The hot soot circulation circuit 3 is connected to a pipe 32 that connects the heat medium that has received heat from the entrusted heat exchanger 27 to the suction side of the second rotary compressor 31 attached to the windmill 13 and from the discharge side. It is a closed circulation circuit composed of a heat radiation pipe 33 disposed below the reference water level 41' in the water tank 41 and a pipe line 35 leading to the heat receiving circuit of the heat exchanger 27 via the expansion valve 34. It is filled with gas that has undergone heat exchange. * In this heat medium circulation circuit 30, first, hot soot is flooded by the heat exchanger 27.

Next, the hot soot is further pressurized and heated to a high temperature by the second rotary compressor 31, and this exchanges heat with water in the heat radiation pipe 33 section in the water tank 41, flooding the water and cooling the hot soot at the same time. ,
It is further cooled as it passes through the expansion valve 34 and into the heat exchanger 27. Therefore, the temperature of the water in the water tank 41 increases day by day due to heat exchange with the heating medium, and gradually becomes hot water.

In addition, 42 in the figure is an expansion tank/water receiving tank installed at an appropriate height with respect to the water tank 41, and the water supply from the water supply pipe 43 is adjusted by a ball tap 44, so that the water level in the water tank 41 is kept constant. It is configured as follows. Therefore, when the wind turbine 12 is driven by wind power, cooling compressed air is accumulated in the compressed air reservoir 24 by the respective pipes 20 and 30.
Also, the water in the water tank 41 is flooded, and air energy is provided in stages as pressure or heat, respectively.

Incidentally, the efficiency and amount of heat obtained by the air energy storage, conversion, and extraction device of this invention are as shown in the table below.

Note 1. Air accumulation amount = suction amount x 60 2. The amount of heat that can be given i includes the heat due to the compression of the accumulated air and the heat of friction.

Amount of heat that can be given3. Heat medium compressor load = Hot soot compression function When each of the provided energies is taken out as compressed air, it is carried out through a branch pipe 51 provided in the compressed air reservoir 24, and one of the branch pipes 51 51A is Open/close valve 5
2 to the turbine 53, and this turbine 53
is attached to the wind turbine rotating shaft 13 so as to be connectable/disconnectable via a clutch 54, and the rotation of the wind turbine 12 can be appropriately urged using the air pressure of the compressed air reservoir 24.

Note that this turbine 53 is provided for the purpose of acting as a pressure regulating valve or a safety valve within the compressed air reservoir 24, and is used in cases where the pressure within the air reservoir 24 increases abnormally due to strong winds, etc. This pressure is kept within the allowable pressure limit of the air reservoir 24, and when the wind power decreases and sufficient rotation of the wind turbine cannot be achieved thereafter, the air reservoir 24 is gradually opened to allow the rotation of the wind turbine 12. As a result, windmill 1
The number of revolutions of the two rotations can be made uniform to some extent.

The air supply pipe 51A for driving the turbine 53 is once installed so as to surround the turbine 53, and receives the heat generated when the turbine is driven, and this heat expands the air in the pipe 51A to increase the driving pressure. It is being done.

On the other hand, the other branch pipe 518 passes through a check valve 55 and preferably an expansion coil 56 disposed within the water tank 41.
It is configured to be openable to the outside S by operating the on-off valve 57,
Connect an appropriate pneumatic power device (not shown) to this opening,
It drives these devices.

In this case, when the discharged air passes through the expansion coil 56 in the water tank 41, it receives heat from the hot water in the water tank 41 and increases its pressure.

In addition, when overflowing water is used, a take-out pipe 61 is attached to the water tank 41, and appropriate piping (not shown) is connected to the take-out pipe 61.

In addition, when only hot water is used, the excess compressed air from the compressed air reservoir 24 is used exclusively for driving the turbine.
It is consumed to raise the temperature of hot water.

Furthermore, if the hot water temperature rises too much, a bypass circuit 62 leading from the extraction side of the expansion coil 56 to the turbine 53 may be provided, and air may be supplied to the turbine 53 through this bypass circuit 62. In this case, heat exchange is performed between the compressed air and the hot water, and the temperature of the hot water is lowered. On the other hand, the air supply pressure is also increased, and the turbine driving force is increased, so that energy can be used effectively. The apparatus W described above, except for the wind turbine driving section 10, is entirely thermally isolated from the outside by a heat insulating material, and wasteful heat radiation is minimized as much as possible.

Since this invention is configured as described above, wind energy can be used as a driving source, and the air energy can be stored and stored as pressure and heat. Since the power can only be generated in proportion to the wind power, there is no problem such as difficulty in obtaining a constant amount of power, and at least as long as the windmill is rotating, even a small amount of energy can be stored, so it is a natural energy source. Storage can be carried out effectively and without waste, and since it does not matter whether there is sunlight or not, the location conditions for installation are extremely flexible, and it can be carried out even in areas with heavy rainfall and snowfall, for example. It has advantages such as wide range of use,
As specific applications, those using compressed air can be used for power generation, mechanical drive using air turbines, water pumping, aeration (purification of rivers, lakes and marshes, fish farming), and coatings using compressed air or hot water. Heating and cooling, hot water supply, salt production, sugar production, brewing, local handicraft industries (handmade Japanese paper, agar production, seaweed production, somen production, starch production), water temperature maintenance in fish farms, greenhouse cutting towers, soil heat preservation, snowdrops, etc., and many more. It can be used for many things.

[Brief explanation of drawings]

The drawings are explanatory conceptual diagrams of embodiments of the present invention.

Claims (1)

[Claims] 1. A wind turbine and a wind turbine rotating shaft are used as a driving source, and first and second rotary compressors are attached to the rotating shaft, and an air supply pipe is connected to the intake side of the first rotary compressor, and an outside air intake port or It is connected via an ejector that selects air from a compressed air reservoir according to one of the pressures and a humidifier that moistens the air from the ejector, and the compressed air reservoir is connected to the compressed air reservoir via a heat exchanger and an expansion valve on the discharge side. A conduit is formed that forms a semi-hermetic air compression circuit as a whole by connecting the air supply pipes leading to the second rotary compressor. A pipe for feeding the received heat medium is connected, and a heat medium feed pipe leading to the heat exchanger via a heat radiation pipe and an expansion valve arranged below the reference water level in the water tank is connected to the discharge side. A pipe line is formed which forms a closed heat medium circulation circuit as a whole, and a compressed air take-off pipe with a branched tip is attached to the compressed air reservoir separately from the circuit,
One of the branch pipes is connected to a turbine via an on-off valve, and the turbine is connected to the wind turbine rotating shaft via a clutch so as to be connectable and disconnectable, and the other branch pipe is connected to the turbine via a check valve. , through an expansion coil placed in the water tank;
An air energy storage, conversion and extraction device characterized by being configured to be openable to the outside by operating an on-off valve.