JPS58138954A - Pneumatic energy accumulating, converting and takeout device - Google Patents

Abstract

PURPOSE:To improve the efficiency of pneumatic energy collection and to accumulate the collected energy with the minimum of loss so that the energy is taken out at all times as a uniform output by a method wherein the energy of a wind force and the thermal energy of the air are utilized simultaneously. CONSTITUTION:Air supply pipes 22 are connected to the air intake side of a first rotary compressor 21 through an ejector 25 which is adopted to supply selectively either the air from an open air intake port 23 or the air from a compressed air pool 24 depending on the pressure of any one of the airs and a humidifying device 26 for humidifying the air from the ejector 25 and an air supply pipe 29 leading to the compressed air pool 24 is connected to the discharge side of the compressor 21 through a heat exchanger 27 and an expansion valve 28, to thereby provide a pipe line forming a semi-sealed air compression circuit 20. Further, the air supply pipes 22 are connected to the compressor 21 in such a manner that the flow direction of the air from the open air intake port 23 and that of the air from the compressed air pool 24 coincide with each other as shown in the arrow A so that the air is applied through any of the supply pipes having a higher air supply source. Consequently, it is possible to store pneumatic energy as a pressure and heat by utilizing the wind force energy whereby the accumulation of natural energy is accumulated effectively and is taken out as a uniform output at all times.

Description

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

Conventionally, various attempts have been made to utilize solar energy, and many of them have already been put into practical use.

There are two types of solar energy: solar heat usage and air energy usage.
There are 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 restrictions like solar thermal energy, and is far 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 air energy utilization 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 thermal energy) and for storing the obtained energy in a uniform state. Although windmill power generation and the like are being used, it is only used as an emergency power source, and it has not reached the point where it can be used in daily life.

In view of the above, this invention aims to simultaneously utilize wind energy and air thermal energy, to limit the energy capture efficiency, and to store air energy that can store the obtained energy with little loss and extract it as a 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. to the side
A pipe line is formed by connecting an air supply pipe leading to the compressed air reservoir via a heat exchanger and an expansion valve, forming a semi-hermetic air compression circuit as a whole, and A pipe for feeding the heat medium that has undergone heat exchange in the heat exchanger is connected to the suction side of the compressor, and a heat radiation pipe and an expansion valve arranged below the reference water level in the water tank are connected to the discharge side. A heat medium supply pipe is connected to the heat exchanger through the pipe to form a closed heat medium 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 branched pipes is connected to a turbine via an on-off valve, the turbine is attached to the wind turbine rotation shaft so as to be connectable and disconnectable via a clutch, and one of the branched pipes is connected to the turbine through a clutch. The other one is configured to be openable to the outside by operating an on-off valve through a reverse valve and an expansion coil disposed in the water tank.

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 heat medium circulation circuit 30 (shown by a chain line) for extracting thermal energy, and a heat storage section 40 (shown by a chain line) for storing heat carried by the heat medium.

The configurations and effects of these will be explained below.

The wind turbine section 1o has legs firmly fixed in the ground, and has a structural strength that can withstand external forces such as wind pressure and earthquakes, and a steel frame 11 that is raised to a height capable of capturing sufficient wind power. The windmill 12 is pivotally supported by the windmill 12, and the rotation shaft 1 of this windmill
3, and this rotating shaft 13 is provided with a clutch 14 for connecting/disconnecting rotational transmission as necessary. With this wind turbine rotating shaft 13 as a drive shaft, this shaft ↓ 3
a first rotary compressor 21, for example a screw compressor, and a second rotary compressor 21, for example a screw compressor;
A rotary compressor 31 such as a screw compressor is installed.

As the windmill 12 in the above, a low to high speed windmill is used as appropriate depending on the installation conditions, but a high speed windmill has a uniform strong wind (
It is easy to stall unless a wind force of 4 to 5 or more is obtained.
Also, since starting performance is poor, it is appropriate to use a medium speed wind turbine.

wings A medium-speed wind turbine with a diameter of 2.0 m was used.

When the wind speed is approximately 5.0 m/s, the output is approximately 8.4 to 9.
-m/s 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 selectively supplies air from the outside air intake port 23 or the compressed air reservoir 24 depending on the pressure. , l and the air from the ejector are connected via a humidifying device 26 for humidifying the air, 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 forms a semi-closed air compression circuit 20 as a whole.

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 air is supplied from the pipe with the stronger air supply pressure. is configured to be

In addition, the humidifying bag holder 26 has an overflow pipe 262 and a drain trap ε connected thereto at a level position where water constantly drips from the water supply 'f 26 ]- and an air passage is maintained.
63 is installed.

In this air compression circuit 20, air supplied from either the outside air intake port 3 or the compressed air reservoir 24, or both, is compressed by a rotary compressor 21 driven by the wind turbine shaft 13. , 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'□ air enters the heat exchanger 27 and then
``It exchanges heat with the heat medium described above 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 condensing 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 heat medium circulation circuit 30 connects the heat medium that has received and removed heat in the heat exchanger 27 to the suction side of the second rotary compressor 31 attached to the wind turbine shaft 13 and from the discharge side. It is a closed circulation circuit composed of a heat radiation pipe 33 disposed below a 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 an expansion valve 34.

A gas suitable for heat exchange is sealed inside.

In this heat medium circulation circuit 30, first, the heat exchanger 27
The heating medium is heated by this. Then a second rotary compression [
31, the heating medium is further pressurized and heated to a high temperature, which exchanges heat with water in the heat radiation pipe 33 section in the water tank 41, warming the water and cooling the heating medium at the same time, passing through the expansion valve 34 and exchanging heat. When entering the vessel 27, it is further cooled.

Therefore, the temperature of the water in the water tank 41 is gradually increased through heat exchange with the heat medium, and gradually becomes hot water.

In addition, 42 in the figure is an expansion tank and 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 pole tap 44 to keep the water level in the water tank 41 constant. It is configured so that

Therefore, when the wind turbine 12 is driven by wind power, cooling compressed air is accumulated in the compressed air reservoir 24 in the respective pipes 20 and 30, and the water in the water tank 41 is heated, and the air energy is are prepared step by step 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.

When each of the stored 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 side 51A of this branch pipe 51 is connected to an on-off valve 5.
2 to the turbine 53, and this turbine 53
are attached to the wind turbine rotating shaft 13 so as to be connectable and disconnectable via a clutch 54, so that the rotation of the wind turbine 12 can be appropriately urged using the air pressure of the compressed air reservoir 24. The 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 when the pressure within the air reservoir 24 increases abnormally due to strong winds, etc. The pressure is kept within the allowable pressure limit of the air reservoir 24, and when the wind power decreases and the wind turbine cannot rotate sufficiently, it is gradually opened to allow the wind turbine 12 to rotate.

As a result, the number of rotations of the wind turbine 12 can be made uniform to some extent.

The air supply pipe (51A) for driving the turbine 53 is installed so as to surround the -tan turbine 53, receives heat generated when the turbine is driven, expands the air in the pipe 51A with this heat, and increases the driving pressure. It is set to increase.

On the other hand, the other branch pipe 51B passes through a check valve 55, preferably an expansion coil 56 disposed in 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 its pressure increases.

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

In addition, when using hot water in winter, 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 occurs between the compressed air and the hot water, the temperature of the hot water decreases, while the air supply pressure also increases,
Since the turbidity driving force increases, the energy y 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.

Since this invention is configured as described above, wind energy can be used as a driving source, and air energy can be stored and stored as pressure and heat. It is possible to generate power only in proportion to the wind power, so there is no problem of difficulty in obtaining a constant amount of power, and at least as long as the windmill is rotating, energy will be stored even if it is small, so it is a natural energy source. Storage can be carried out efficiently 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 or snowfall. , it has the advantage of wide range of use, and as a specific application, it uses compressed air.
It can be used for power generation, mechanical drive by air turbines, water pumping, aeration (purification of rivers and lakes, fish farming), and painting, and can also be used for heating and cooling, hot water supply, salt production, sugar production, brewing, and handicraft production using compressed air or hot water. It can be used for many purposes such as industry (handmade Japanese paper, agar production, glue production, somen noodles production, starch production), maintaining water temperature in fish ponds, greenhouse cultivation, soil heat preservation, snow melting, etc.

[Brief explanation of the drawing]

The drawings are conceptual diagrams for explaining the invention in detail. W...Air energy storage, conversion and extraction device, 10
... Wind turbine drive unit, 11... Frame, 12... Wind turbine,
13... Wind turbine rotating shaft, 14... Clutch, 20...
-Air compression circuit, 21...first rotary compressor, 22
゜29...Air pipe, 23...Outside air intake, 24...
・Compressed air reservoir, 25... Ejector, 26...
Humidifier, 27... Heat exchanger, 28... Expansion valve, 3
o... Heat medium circulation circuit, 31... Second rotary compressor, 32° 35... Pipe line, 33... Heat radiation pipe, 34...
・Expansion valve, 4゜... Heat storage part, 41... Water tank, 41゛... Reference water line surface of water tank, 51... Branch pipe, 51A・
...One branch pipe, 51B...The other branch pipe, 52.
... Opening/closing valve, 53... Turbine, 54... Clutch.

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 the first and second rotary compressors are attached to the rotating shaft.
An air supply pipe is connected to the suction side of the rotary compressor via an ejector that selects air from an outside air intake or a compressed air reservoir depending on the pressure, and a humidifier that moistens the air from the ejector. , a pipe line is formed on the discharge side, which connects an air supply pipe leading to the compressed air reservoir via a heat exchanger and an expansion valve, forming a semi-hermetic air compression circuit as a whole; The suction side of the rotary 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 a heat dissipation pipe arranged below the reference water level in the water tank. A heat medium supply pipe leading to the heat exchanger is connected via an expansion valve. A pipe line is formed that 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, and one of the branch pipes is connected to the pipe through an on-off valve. The turbine is connected to the wind turbine rotating shaft through a clutch so as to be connectable and disconnectable, and the other branch pipe is connected to an expansion coil disposed in the water tank through a check valve. An air energy storage, conversion and extraction device characterized in that it is configured to be openable to the outside by operating an on-off valve.