JP2017053246A - Power generating system and power generating method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power generating system and a power generating method utilizing hydraulic pressure, compressed air and atmospheric pressure.SOLUTION: This invention provides a power generation method enabling compressed air to be utilized again and utilizing hydraulic pressure/compressed air and atmospheric pressure and provide a power generator based on the power generation method comprising a water tank 100 always filled with water; a withdrawal house of airtight structure 200 with its base part extending below a water surface in the water tank 100 and its upper surface showing a height from the water surface of about 7 m (meter) to 8 m, for example; a lower water flowing passage 260 connected below by a prescribed distance from the upper-most part of the withdrawal house 200 and extending in a substantial horizontal direction; a gate 300 capable of controlling to decide weather or not the withdrawn water at an inlet port (base part) of the lower flowing passage 260 is flowed to the lower flowing passage 260; a water flowing passage 350 for injecting compressed air into the lower flowing passage 260, coinciding the compressed air injecting direction with a water flowing direction to perform a more efficient supply of air into an atmospheric pressure chamber 400 and extending down from the bottom part of the atmospheric pressure chamber 400 to a part below the water surface in the water tank 100; and a power generating water turbine 700 of a water turbine type power generator arranged near below the water surface in the water tank 100 below the water flowing passage 350.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a power generation system and a power generation method using water pressure / compressed air and atmospheric pressure.

  Conventional hydroelectric power generation generally uses a water wheel. The principle of hydroelectric power generation using this water wheel is a method in which a water wheel is provided in the middle of a conduit to convert the moving energy of water into the rotational energy of the water wheel, and further convert the rotational energy of the water wheel into electrical energy generated by the generator.

  The invention described in Patent Document 1 was developed and disclosed by the inventors of the present application, and a specific power generation method is as shown in FIG. This conventional method reduces the weight of atmospheric pressure in the water channel pipe 4 by the action of the compressed air moving upward from the compressed air outlet at the bottom of the water channel tube 4, and enters the water channel tube 4 from the water channel 2 side. By reducing the specific gravity of the inflow water of the water and making the energy of the atmospheric pressure acting on the water channel side and the water pressure act as energy to push up the water in the water channel pipe 4 to a high position, While always flowing water from the inflow portion and adjusting the water amount of the water channel through the water amount adjusting unit 3, the water is introduced into the upper inclined water channel tube and at the same time compressed air is supplied from the compressed air storage unit 6 directly connected to the water channel to the water channel tube 4 This is a groundwater flow power generation method that uses water pressure / compressed air and atmospheric pressure to push the water flowing into the water pipe 4 and flow again into the turbine A generator A.

  The compressed air at the top of the pipe is sucked up by the blower B, recompressed, and sent again to the compressed air outlet at the bottom of the water pipe 4.

  The invention described in Patent Document 2 was also developed and disclosed by the inventor of the present application, and as shown in FIG. 5, the pumping channel 200 is filled with water, and the upper part is an airtight structure to store compressed air. The compressed air is stored in the unit 320, the compressed air is sent to the compressed air ejecting device 350, ejected into the pumped water channel 200, and the weight of the atmospheric pressure is reduced by the action of the compressed air moving upward, and the pumped water channel 200. The specific gravity of the water is reduced, the weight of the atmospheric pressure and the water pressure acting on the water flowing into the pumping channel 200 are used as energy to push the water in the pumping channel 200 to a high position, and the overflowing water The generator 500 directly connected to the water turbine is driven by using the falling energy of the dropped water from the dropping port 270, and the compressed air rising upward in the pumping path 200 is sucked out by the blower and the compressed air storage unit Send to It had used.

JP 2006-77719 A JP, 2014-31786, A

  However, in the invention described in Patent Document 1, compressed air or the like is sent to the bottom of the pipe, and the air sent to the bottom becomes bubbles to use energy (including pressure difference energy) that rises in the pipe. The water turbine or turbine was rotated using the kinetic energy of the moving water, and the energy efficiency was unsatisfactory. Moreover, the structure of the compressed air ejection means was also large.

  Similarly, the invention described in Patent Document 2 also ejects (injects) compressed air into the pumping channel 200 and reduces the weight of the atmospheric pressure by the action of the compressed air that moves upward, thereby reducing the water in the pumping channel 200. The specific gravity was reduced, and the pumped water was dropped to generate electricity. For this reason, it had the same problem to be solved as in Patent Document 1. In order to increase energy efficiency, a compressed air storage unit for storing compressed air was provided, but the configuration was complicated and the power generation efficiency was not satisfactory.

  Furthermore, there has been a demand for a power generation system and a power generation method with high power generation efficiency and a simplified configuration.

The present invention has been made to solve the above-described problems, and provides a power generation system and a power generation method using water pressure / compressed air and atmospheric pressure that can improve power generation efficiency and increase power generation. For example, the following configuration is provided as one means to do this.

  That is, at least a lower part of the liquid storage part filled with a liquid and a liquid storage part that sinks to the lower part of the liquid level of the liquid storage part and is arranged so that the upper part protrudes to the upper part of the liquid level. A pumping path provided with a liquid outlet at a position, compressed gas storage means for storing a certain amount of compressed gas, an upper water conduit for leading the liquid pumped from the liquid outlet to a certain distance downward, and the upper part Connected to the descending end of the water conduit and a horizontal water conduit having an open / close gate at the inlet for horizontally sending out the liquid, the upper portion connected to the horizontal water conduit and connected to the gas compressor, and the lower portion to the power turbine A liquid collecting part that is connected to a water conduit that supplies the liquid to the liquid, and that can collect the liquid at least below the horizontal water conduit connecting part, and a compressed gas storage tank that stores a gas compressed by the gas compressor; The compressed gas from the compressed gas storage tank A compressed gas supply path that injects in the direction of the liquid collection part from a horizontal water supply path inlet; a substantially vertical water supply path that supplies liquid collected from the bottom of the liquid collection part to the generator; and the water supply path A power generation system is provided that includes a power generation unit that is provided in a lower portion and generates power with the falling energy of the liquid falling from the water conduit.

  And, for example, the compressed gas supply path end is provided with two stages of upper and lower compressed air injection ports disposed in the horizontal water conduit. Alternatively, for example, the liquid collection unit collects the liquid fed together with the compressed air from the horizontal water conduit, and also upwards the compressed air emitted from the horizontal water conduit at a predetermined interval position from the horizontal water conduit. The partition plate has a lower end that extends to a level below the collected liquid water surface, and an upper end that extends to the vicinity of the connecting portion to the gas compressor. .

Further, for example, an airtight portion for maintaining the liquid level upper portion of the liquid storage portion in an airtight state, and a high pressure maintaining portion for pressurizing the inside of the airtight portion to maintain a high pressure state at or above atmospheric pressure, the height of the hot water channel It is characterized by being able to raise.
Further, for example, the gas compressing means compresses and sucks the air in the upper part of the liquid collecting part with a high-pressure compression suction fan.

  Or at least a lower part of the liquid storage part filled with liquid and a liquid storage part that sinks in the lower part of the liquid level of the liquid storage part and that the upper part comes out of the upper part of the liquid level and has a predetermined height above the liquid level near the upper end part. A pumping path provided with a liquid outlet at a position, compressed gas storage means for storing a certain amount of compressed gas, an upper water conduit for leading the liquid pumped from the liquid outlet to a certain distance downward, and the upper part Connected to the descending end of the water conduit and a horizontal water conduit having an open / close gate at the inlet for horizontally sending out the liquid, the upper portion connected to the horizontal water conduit and connected to the gas compressor, and the lower portion to the power turbine A liquid collecting part that is connected to a water conduit that supplies the liquid to the liquid, and that can collect the liquid at least below the horizontal water conduit connecting part, and a compressed gas storage tank that stores a gas compressed by the gas compressor; Compressed gas from the compressed gas storage tank A compressed gas supply path that exits in the direction of the liquid collection section from the horizontal water path entrance; a substantially vertical water supply path that supplies liquid collected from the bottom of the liquid collection section to the generator; and A power generation method of a power generation system provided at a lower part of a water channel and including a power generation unit that generates power with the falling energy of liquid falling from the water conduit, and stores compressed air in a weir compressed gas storage unit before starting power generation, The openable gate is closed to fill the pumping channel with the liquid, and the liquid pumped by opening the gate during power generation and the gas stored in the compressed gas storage means from the horizontal channel The power generation method is characterized in that the gas is supplied to the liquid collecting part and the gas is supplied from the upper part of the liquid collecting part to be compressed by the gas compressor.

According to the present invention, the liquid pumped up by the effective use of atmospheric pressure is guided to the horizontal channel, the direction of the direction of the direction can be guided, and the jet power of the compressed gas can be applied to the liquid moving in the same direction. The liquid in the waterway can often be supplied to the power generation turbine.

  Further, since the compressed gas used can be reused, the compressed power can be suppressed and efficient power generation can be achieved.

It is a figure for demonstrating the basic composition of the electric power generation system of the example of one embodiment which concerns on this invention. It is a figure for demonstrating the compressed air injection mechanism of the electric power generation system of this Example.

It is a figure for demonstrating the structure of the electric power generation system of the 2nd Embodiment based on this invention. It is the schematic which showed the conventional underground water flow power generation system.

It is the schematic which showed the other example of the conventional underground water flow power generation system.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.
A power generation method according to an embodiment of the present invention is a flowing water power generation method that effectively uses water pressure, atmospheric pressure, and compressed gas energy in a liquid supply path used for power generation. The compressed gas used to give momentum to the movement of the lifted and pushed up liquid and the compressed gas used can be pre-stored as energy by surplus power, and energy is provided by a compressed gas circulation system that isolates atmospheric pressure. This makes it possible to reuse power and efficiently generate power.

  That is, at least the lower part is set up so that the liquid part (water tank) filled with liquid, for example, water, seawater, brackish water, antifreeze or other liquid, sinks to the lower part of the liquid level of the liquid part, and the upper part comes out above the liquid level. An airtight pumping channel (pumping ridge) provided with a liquid outlet at a predetermined height position from the liquid level near the upper end, and a certain amount of compressed gas, for example, atmospheric air, nitrogen with stable characteristics, etc. A compressed gas storage tank that stores gas, an upper water conduit that leads the liquid pumped from the liquid outlet to a certain distance downward, and an open / close-type inlet that is connected to the descending end of the upper water conduit and feeds the liquid horizontally A horizontal waterway with a gate, an upper part connected to the horizontal waterway, connected to a gas compressor, a lower part connected to a waterway that supplies liquid to the water turbine, and at least liquid below the horizontal waterway connection part Liquid collecting part (atmospheric pressure chamber) that can collect liquid and gas compression A compressed gas storage tank for storing the gas compressed in step (b), a compressed gas supply path having a gas outlet for injecting the compressed gas from the compressed gas storage tank from the inlet (downstream of the gate) of the horizontal conduit to the liquid collection part; A substantially vertical water conduit that supplies liquid collected from the bottom of the liquid collector to the generator, and a generator that is provided at the bottom of the water conduit and that generates electricity using the falling energy of the liquid falling from the water conduit. It is set as the electric power generation system characterized by providing.

  And, for example, the compressed gas supply path end is provided with two upper and lower compressed air injection ports arranged in the horizontal water conduit. Alternatively, for example, the liquid collection unit collects the liquid fed together with the compressed air from the horizontal water conduit, and sends the compressed air emitted from the horizontal water conduit to the predetermined interval position from the horizontal water conduit upward. A partition plate is provided, wherein the partition plate has a lower end portion extending below the liquid water surface where the liquid has been collected, and an upper end portion extending to the vicinity of the connecting portion to the gas compressor.

Furthermore, for example, an airtight part that maintains the liquid level upper part of the liquid storage part in an airtight state and a high pressure maintenance part that pressurizes the inside of the airtight part and maintains the high pressure state at or above atmospheric pressure to increase the height of the hot water channel. It is possible to configure.
Further, for example, the gas compressing means compresses and sucks the air in the upper part of the liquid collecting part with a high-pressure compression suction fan.

  And it is provided with the above composition, and before starting the power generation, the compressed air is stored in the dam compressed gas storage means, the openable gate is closed, the liquid is filled in the pumping channel, and the gate is opened during power generation. The liquid that is opened and pumped and the gas that is stored in the compressed gas storage means are supplied from the horizontal water conduit to the liquid collecting part, and the gas is supplied from the upper part of the liquid collecting part to the gas compressor for compression. It is set as the electric power generation method characterized by doing.

[Outline of groundwater hydropower generation in this embodiment]
Current hydropower is generally stored in dams and power generation in mountainous areas, but in this embodiment, if there are a certain amount of water tanks or ponds, atmospheric pressure, compressed air, and water pressure can be generated. Water is pumped up and hydroelectric power can be generated even on flat land such as urban areas by circulating and reusing water and compressed air.

  In principle, in an environment of zero atmospheric pressure, the height is about 10 m for water due to atmospheric pressure action. Therefore, the atmospheric pressure is used to pump up to about 10.0 m above the surface of the water as a vacuum region, and the pumped water is discharged to the atmospheric region using compressed air, and power is generated using the fall energy at that time.

  The compressed air used for discharge to the atmospheric pressure range is configured to be recovered by, for example, a blower (blower) and recompressed and reused. However, the manufacture of the compressed air for starting to drive the first first generator must use external power.

  In the present embodiment, it is sufficient to use about 18% to 30% of the power generated by the power generation as the power source of the blower. Therefore, the actual usable power generation is about 80% to 70% of the power generated by the present embodiment (in the actual power generation system, two generators are installed, and the blower is struck. By supplying electric power at (1), even if one of them stops, the electric power supply to the blower is secured by the electric power of the other generator).

  In the power generation system of the present embodiment, a large amount of power is not required for the production of compressed air if the operating pressure value is a low pressure of 150 KPa to 110 KPa for the power necessary for the production of compressed air. By producing and storing a part of the nighttime electric power, the generated electric power according to the power consumption situation can be obtained.

The specific power generation principle of this embodiment is summarized as follows.
(1) When atmospheric pressure is used, water can be pumped up to about 10 m in a vacuum region.
(2) When using compressed air, instead of compressing from the normal atmospheric pressure, if the compressed air is reused, the power required for recovery and re-pressurization is compressed from the atmospheric pressure (air). Compared to about 1/10 of the power.

  Based on the above, as an energy source, (1) atmospheric pressure is about 760 mmHg of mercury (Tritricelli experiment). Air is compressed in advance, and compressed compressed air (150 KPa to 100 kp) is stored in a compressed air storage tank (in addition to its main purpose of use, water evaporation and antifreezing can also be expected).

(2) Pump up to the required height in the pumping wing in advance (pumping to the required height in advance by external power when the generator is started).
(3) Electric power is consumed when the atmosphere is compressed by a high-pressure compressor or blower. In this embodiment, it is basically provided with two generators. In this embodiment, compression is performed using external power at the start of power generation of the first unit, and one of the power generators is used after the second power generation. About 30% of electricity generated by electricity is consumed for compression (the first and subsequent generations use the generated power).

(4) Recycle and reuse water.
(5) As described above, compressed air is compressed with a power consumption of about 20% to 30% of the generated power by using recovery and re-pressurization and improving efficiency.
(6) The power generation capacity of one generator can be set to 100 kW to 10000 kW. In this example, an underwater installation type turbine generator is used, and a specification is made to generate 100 kW with one turbine, and if it is 10000 kW, ten conduits are installed. The actual available power is assumed to be 50% to 70% of the generated power.

(7) The unit price of power generation is approximately 6-8 yen per 1 kWh (calculated with a depreciation 30-year interest rate of 2%).
(8) power plant site is the generator one group per 200 meters ² to 1000 m ^2, is also conceivable use example of the power generation only buildings in urban areas. In addition, for example, use of urban spaces such as schools, parks, sports facilities, underground spaces in buildings and parking lots, use of farmland (abandoned farmland), venue power plants in bay harbors, lakeside power plants, etc. It is not limited and can be installed freely.

  According to the power generation system of the present embodiment based on the above specifications, (1) the effect of preventing global warming by reducing the use of fossil fuels, and (2) power generation even in urban areas, Production and promotion of eco-cars (construction of a power plant in a hydrogen production base) can be realized.

  Furthermore, since the structure is simple, the cell cost of the power plant can be kept low.

[Example of basic structure of generator of this embodiment]
Based on the above, a specific configuration example of the power generation system of the present embodiment will be described with reference to FIG. FIG. 1 is a diagram illustrating a basic configuration example of a power generation system according to the present embodiment.

  As shown in FIG. 1, in the present embodiment, a water tank 100 in which water which is always liquid is stretched, and a base portion extends below the water surface of the water tank 100 and the upper surface is, for example, a height of 7 m (meters) to 8 m above the water surface. The airtight structure of the pumping ridge 200, the upper water conduit 210 extending substantially horizontally from the top of the water pumping ridge, the lower water conduit 250 extending slightly below the end of the upper water conduit, and the lower water conduit 250 includes a lower water conduit 260 extending horizontally from the lower portion again, and a gate 300 that can control whether or not the pumped water provided at the entrance (base) of the lower water conduit 250 flows to the lower water conduit 260. . The lower water guide channel 250 has a function of preventing the compressed air from flowing back to the pumping tower 100. In principle, the lower water guide channel 260 extends in the horizontal direction, but the compressed air can almost always be sent to the atmospheric pressure chamber 400 by inclining slightly upward.

  Further, the upper part capable of holding the pumped water is hermetically configured, and the atmospheric pressure chamber 400 is configured such that the lower part communicating with the front end part of the lower water guide path 260 is disposed below the lower water guide path 260 by a predetermined distance. A water conduit 350 extending from the bottom of the atmospheric pressure chamber 400 to the bottom of the water tank 100, a water turbine 700 of a water turbine generator disposed near the water surface of the water tank 100 in the lower part of the water conduit 350, and a compression An air storage tank 600, a compressed air passage 650 communicating between the compressed air storage tank 600 from the upper part of the atmospheric pressure chamber 400, an air compressor 500 capable of compressing air disposed in the middle of the compressed air passage 650, and compressed air And a compressed air outlet pipe 670 for ejecting the compressed air stored in the storage tank 600 into the lower water conduit 260.

  In the above configuration, in the present embodiment, when the pumping ridge 100 is set to a height of about 7 to 8 m from the water surface and the inside of the pumping ridge 100 is in a vacuum state under an atmospheric pressure (100 KPa) environment, the effect of atmospheric pressure is theoretical. Is a calculation that can be realized up to a height of about 10 m (meters), but it is a range of 7 m to 8 m because it is a range that can reliably pump water. Actually, before starting this system, the water in the water tank is pumped up by a pump (not shown) so as to fill all of the pumping tower 100, and the inside of the pumping tower is made a vacuum.

  The upper limit of the discharge rate from the pumping ridge 100 to the atmospheric pressure chamber 400 is determined in proportion to the cross-sectional area of the lower water guide channel 250. Alternatively, the upper limit of the discharge flow rate is determined by the opening ratio of the gate 300. Furthermore, in this embodiment, since the vector of the injection direction of water / compressed air is set to the same direction and the discharge output of water / compressed air is combined, 1 of the pressure value of the atmospheric pressure chamber 400 is adopted. .3 times to 1.5 times (compressed air 110 KPa to 130 KPa + water pressure 20 KPa). Further, the water surface of the atmospheric pressure chamber 300 is kept lower than the lower part of the lower water conduit 260 to prevent the backflow of compressed air to the pumping ridge 100 side.

  In the example of FIG. 1, the air compressor is not a compressor but a blower, for example, an inlet pressure of 120 KPa and an outlet pressure of 130 KPa. This is because the air recovered from the atmospheric pressure chamber 400 having an airtight structure at the top is reused, and air compression with low power is realized.

  As a specific configuration example of the above power generation system, the pumping ridge 200 is formed in a cylindrical shape having an inner diameter of 1.0 m, the lower opening end is fixed on a table 1.5 m from the bottom of the water tank 100, and the upper side from the water surface. The height up to 5.0 m to 9.0 m. The upper water conduit 210 has a rectangular cross section with a height of 0.5 m and a width of 1.0 m and a length of 1.5 m.

  The lower water guide channel 250 is a cross-sectional rectangle having a height of 0.5 m and a width of 1.0 m, and a length of 2.0 m. The lower water guide channel 250 between the gate 300 and the atmospheric pressure chamber 400 is a cross-sectional rectangle having a height of 0.3 m and a width of 1.0 m and a length of 0.3 m. The gate 300 is in a closed state when a vertically moving gate plate is disposed at the lower portion, and is opened when it is disposed at the upper portion.

  The atmospheric pressure chamber 400 is a rectangular rectangle having a length of 3.0 m and a width of 2.0 m, and a water conduit 350 having an inner diameter of 0.5 m extends from the center of the bottom end (opposite position of the lower water conduit opening) to the bottom of the water surface. ing. The distal end portion of the compressed air outlet tube 670 for ejecting compressed air has a rod-like ejection tube structure with a predetermined width arranged in the lateral direction near the bottom near the inlet and near the top near the inlet of the lower water conduit 250. Holes are provided at a predetermined interval on the pressure chamber 400 side, and the compressed air is ejected from the holes toward the atmospheric pressure chamber. This structure is shown in FIG. In FIG. 2, a compressed air emission pipe is arranged in the horizontal direction indicated by a chain line, and a plurality of injection holes for injecting compressed air in the arrow direction are provided.

  In the present embodiment, the water flow is injected in the direction of water flow with respect to the water flow flowing in the horizontal direction, so that the water flow can be strengthened efficiently and the injection force of the compressed air can be efficiently given to the water. Further, this compressed air is discharged to the atmospheric pressure chamber 400, but is sent to the air compressor (blower) 500 from the upper portion of the atmospheric pressure chamber 400.

  For this reason, the compressed air can be reused, and desired compressed air can be obtained with less power compared to compressing air under atmospheric pressure when the air is compressed by the air compressor 500. The compressed air pressure is desirably set to 110 KPa to 130 KPa, which is 10% to 30% higher than the atmospheric pressure, for example. As a result, the desired compressed air can be obtained with very little compression. In this embodiment, a high-performance blower manufactured by Otsuchi Machine Industry Co., Ltd. is used as the air compressor.

When the power generation system is constructed by the above method, for example, in the case of a power generation system having a power generation capacity of 500 KW, when compressed air is jetted into the lower pumping path in the lower pumping path at about 1.0 m ³ per second as described later, the power generation system is set to 0. 7 to 1.0 m ³ of water can be sent out. When this water is dropped below the water conduit, power generation of about 58.3 KW becomes possible.

In order to drive the high-pressure compressor for repressurizing the compressed air collected in the atmospheric pressure chamber 400, it is necessary to supply 13.0 to 14.5 KW of electric power from the generated electric power. Therefore, of the generated power, the actual usable power is 58.3 KW-12.7 KW = 45.6 KW.
It becomes.

  Hereinafter, the principle of power generation according to this embodiment will be described with reference to the drawings. FIG. 1 is a diagram for explaining the power generation principle of a power generation system according to an embodiment of the present invention.

  The power generation system of the present embodiment includes, for example, a substantially cylindrical pumping channel 200 that pushes up water required for power generation to about 9 meters above the surface of the reservoir by the action of atmospheric pressure and compressed air, and an upper portion of the pumping channel 200. Compressed air recovery / storage mechanism 300 disposed so as to maintain an airtight state, a turbine (turbine) 500 connected to, for example, a generator provided under water at the lower part of drop port 270 of pumping channel 200, and the like. Then, the water turbine 500 is rotated by the falling energy of water from the dropping port 270 to generate power.

  The power generation system in the present embodiment described above is a power generation method that uses the water pressure, the atmospheric pressure, and the compressed air energy at the bottom position of the pumping channel 200 installed in the water tank 100.

  When pumping the pumped water from the pumping tower to the atmospheric pressure chamber, the injection direction of the compressed air and the flow direction of the water can be completely matched, the water can be sent out vigorously, and the storage of the compressed air in the compressed air tank is This is a power generation method using water pressure / compressed air and atmospheric pressure that corresponds to pre-storage as energy by surplus power and enables energy reuse by a compressed air circulation system that isolates atmospheric pressure even during power generation. is there.

  In addition, since compressed air injected into the atmospheric pressure chamber 400 can be reused without being released to the outside, it is possible to generate compressed air during power generation with a small amount of power just by filling the compressed air before power generation. This is a power generation mechanism that uses water pressure, compressed air, and atmospheric pressure, and therefore provides a power generation system that uses inexhaustible, non-polluting, and low-cost natural energy to the fullest.

Second Embodiment In the second embodiment according to the present invention, a configuration is provided in which compressed air can be recovered more efficiently when the compressed air injected into the atmospheric pressure chamber 400 is reused. In the second embodiment, efficient compressed air recovery can be expected by providing the following structure in addition to the structure of the atmospheric chamber 400 of the first embodiment.

  In the second embodiment, a passage for sending recovered air to the air compressor 500 is disposed above the outlet of the lower water conduit 260 above the atmosphere chamber 400.

  Then, a compressed air section separator 450 is provided extending from the lower water conduit 260 to the lower portion of the water surface 410 that flows down into the atmospheric chamber 400, and the upper portion to the vicinity of the recovery air passage to the air compressor 500. As a result, compressed air is ejected from the lower water conduit 260 together with water. However, even if the water hits the compressed air section separator 450, it falls down as it is, and the compressed air is isolated by the compressed air section separator 450. Therefore, it is possible to efficiently come to the recovery air passage.

Third Embodiment In the description of the above embodiment, the atmospheric pressure on the surface of the water tank 100 is atmospheric pressure, and the atmospheric pressure chamber 400 is not subjected to special pressurizing treatment. However, for example, the entire surface of the water tank 100 has an airtight structure, and the air pressure on the surface is increased to, for example, 1.2 times or 1.5 times the atmospheric pressure.

  Thus, by raising the pressure on the surface of the water tank 100, the pumpable height of the pumping tower can be further increased. When the pressure on the surface of the water tank 100 is 1.2 times, the height of the upper surface of the pumping tower from the water surface can be raised to 8 to 10 m, and higher power generation can be obtained. In this case, the specification of the blower for compressing air can be an input pressure of 140 KPa and an outlet pressure of 150 KPa.

  When the pressure on the surface of the water tank 100 is 1.5 times, the height of the upper surface of the pumping ridge from the water surface can be raised to 8 to 12 m, and further high power generation can be obtained. In this case, the specification of the blower for compressing air can be set to an input pressure of 170 KPa and an outlet pressure of 180 KPa.

Other Embodiments An example in which water in the water tank 100 is used for power generation has been described. However, the liquid for rotating the water turbine of the generator is not limited to water, but may be seawater. Alternatively, brackish water or antifreeze may be used. There is no restriction on the type of liquid used as long as the pumping path is installed in a liquid storage unit with a sufficient capacity.

  Furthermore, since compressed air is airtight, it may be filled with a gas other than air, such as nitrogen.

Claims (6)

A liquid reservoir at least at the bottom filled with liquid;
A pumping path that sinks in the lower part of the liquid level of the liquid storage part, is installed so that the upper part comes out above the liquid level, and is provided with a liquid outlet at a predetermined height position from the liquid level near the upper end part;
Compressed gas storage means for storing a certain amount of compressed gas;
An upper water conduit for leading the liquid pumped from the liquid outlet to a certain distance downward;
A horizontal waterway that is connected to a descending end of the upper waterway and is provided with an openable / closable gate at an inlet for horizontally feeding the liquid;
The upper part is connected to a gas compressor, the upper part is connected to a gas compressor, the lower part is connected to a water supply path for supplying the liquid to the power generation turbine, and the liquid collecting part can collect the liquid at least below the horizontal water conduit connection part When,
A compressed gas storage tank for storing gas compressed by the gas compressor;
A compressed gas supply path for emitting compressed gas from the compressed gas storage tank from the horizontal water conduit inlet toward the liquid collection part; and
A substantially vertical water conduit that supplies the collected liquid from the bottom of the liquid collection part to the generator;
A power generation system comprising: a power generation unit provided at a lower portion of the water conduit and configured to generate power with the falling energy of the liquid falling from the water conduit. 2. The power generation system according to claim 1, wherein the end portion of the compressed gas supply path includes upper and lower two-stage compressed air injection ports disposed in the horizontal water conduit. The liquid collecting section collects the liquid fed together with the compressed air from the horizontal water conduit, and also sends the compressed air ejected from the horizontal water conduit upward from the horizontal water conduit to a predetermined interval position. With a partition plate,
3. The partition plate according to claim 1, wherein a lower end of the partition plate extends to a position below the liquid water surface where the liquid is collected, and an upper end of the partition plate extends to the vicinity of a connection portion to the gas compressor. Power generation system. An airtight part for maintaining the liquid surface upper part of the liquid storage part in an airtight state;
The high pressure maintenance part which pressurizes the inside of this airtight part and maintains it in the high pressure state more than atmospheric pressure is comprised, The structure of the said hot water channel can be raised, The structure of Claim 1 thru | or 3 characterized by the above-mentioned. The power generation system according to any one of the above. 5. The power generation system according to claim 1, wherein the gas compressing unit compresses and sucks air in the upper portion of the liquid collection unit with a high-pressure compression suction fan. At least the lower part is filled with liquid, and the liquid storage part is placed so that it sinks to the lower part of the liquid level and the upper part comes out of the upper part of the liquid level. A pumping path provided with a liquid outlet, a compressed gas storage means for storing a certain amount of compressed gas, an upper water channel for leading the liquid pumped from the liquid outlet to a certain distance downward, and the upper water path A horizontal water conduit having an openable / closable gate disposed at an inlet for horizontally feeding the liquid connected to a descending end of the liquid, an upper portion communicating with the horizontal water conduit and connected to a gas compressor, and a lower portion connected to the power turbine. Connected to a water conduit for supplying a liquid, at least a liquid collecting portion capable of collecting the liquid below the horizontal water conduit connecting portion, a compressed gas storage tank for storing a gas compressed by the gas compressor, and The compressed gas from the compressed gas storage tank A compressed gas supply path that exits from the inlet of the water channel in the direction of the liquid collection part, a substantially vertical water supply path that supplies liquid collected from the bottom of the liquid collection part to the generator, and a lower part of the water supply path A power generation method for a power generation system, comprising: a power generation means for generating power with the falling energy of liquid falling from the water conduit,
Store compressed air in the dam compressed gas storage means before starting power generation, close the openable gate to fill the pumping channel with the liquid, open the gate during power generation, and the liquid pumped Supplying the gas stored in the compressed gas storage means from the horizontal water conduit to the liquid collecting part, and supplying the gas from the upper part of the liquid collecting part to compress the gas by compressing it. .

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