JP2007231760A - Airlift pump type combined pumped-storage hydraulic power plant - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To realize a hydraulic power plant using only pumped water as power source without the need for a dam or a river. <P>SOLUTION: Water is pumped up by a highly energy efficient air lift pump comprising a lifting pipe 1 and a large discharge volume air pump 15 to generate an upward flow in the lifting pipe 1. A power generator 10 is driven by a water flow ejected from a nozzle 2 at the terminal, and power obtained by an impulse water turbine 9 to generate electricity. Water is lifted from a water receiving reservoir 7 into a water lifting reservoir 3, so that a downward flow is generated in a hydraulic pipe 5. Thereby, a generator 12 is driven by the water flow ejected from the nozzle 6, and the power obtained by the impulse water turbine 11 to drive the generator 12 so as to generate electricity. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention realizes a hydroelectric power generation device that does not require a dam or a river and does not require any installation location, by using all the water necessary for hydroelectric power generation by pumping the water that has been flowed downstream once and using it again. Is.

  Conventional hydroelectric power generation uses the water pressure of rivers dammed by dams, or the water flow caused by the drop between the intake and discharge of water from the upstream of the river to the location where the hydroelectric generator is installed. The existence of rivers was essential.

  The problem to be solved is to keep the energy required for pumping water smaller than the energy obtained by hydroelectric power generation.

  The present invention uses a bubble pump to pump water. By designing the air for operating the pump with less energy, it is possible to perform pumping with high energy efficiency and solve the problem.

  The driving force for operating the bubble pump is an air pump that sends air into the pipe. In order to reduce the energy used by this pump, it is necessary to reduce the pressure of the water to the place where air is fed and the inner wall surface of the pipe.

  From Bernoulli's theorem, it is known that the higher the flow rate of water flowing in the pipe, the lower the pressure on the inner wall of the pipe. Applying this, when the flow rate of water pumped up by the bubble pump flows from the lower end of the pipe, the pipe inner diameter is made as small as possible within the range where friction loss does not occur, the flow velocity of the water flowing in the pipe is increased, and the inner wall surface of the pipe By reducing the pressure on the air pump, the energy used by the air pump to feed air can be minimized.

  The inside of the pipe is finely partitioned with a plate, and the water pushed up by the bubbles is prevented from flowing under the bubbles from the gap between the inner wall of the pipe and the bubbles. High bubble pump can be realized.

A bubble pump composed of a pumping pipe 1, a rectifying plate 19, a high pressure type air pump 13 and a large discharge type air pump 15 designed based on this idea is used for pumping, and the tip of the nozzle 2 at the upper end of the pumping pipe 1 is used. A hydroelectric power generation device composed of an impulse water turbine 9 and a generator 10 is placed in the power generation system, and power is generated by a water flow generated by pumping. On the other hand, a hydroelectric generator comprising an impulse water wheel 11 and a generator 12 is also placed at the tip of the nozzle 6 at the lower end of the water pressure pipe 5, and power is generated by a water flow generated by a water drop.
Further, the pumped water layer 3, the water pressure pipe 5, and the water receiving tank 7 are designed so as to have a sufficient flow cross-sectional area with respect to the flow rate of the water flowing there, and no friction loss occurs.

  With the hydroelectric generator that pumps water using the bubble pump of the present invention, it is possible to realize a hydroelectric generator that does not require a dam or a river and does not select an installation location.

  The hydraulic pipe side of the apparatus of the present invention is a hydroelectric power generation apparatus using a water drop. For this reason, it is possible to obtain larger electric power by designing the apparatus so as to increase the head of the water by using a hydraulic pipe having a height as high as possible within the range in which pumping can be performed depending on the performance of the bubble pump.

FIG. 1 is a side view showing the structure of an embodiment of the apparatus of the present invention, and FIG. 2 is a cross-sectional view of a pumping pipe used for this.

  The apparatus is activated by the high pressure air pump 13. At the time of start-up, water pressure is applied to the air blowing port at the lower end side of the pumping pipe 1 from the water surface of the pumping tank 3 to the air blowing port, and a high pressure type air pump is required to feed air. .

  When air begins to be fed into the pumping pipe 1, pumping is performed and a water flow is generated in the pumping pipe 1, so that the pressure on the inner wall surface of the pipe is reduced according to Bernoulli's theorem. Further, since air and water are mixed in the pumping pipe 1, the apparent water level is lowered and the pressure is lowered. By these two actions, the pressure applied to the air blowing port on the lower end side surface of the pumping pipe 1 is lowered, so that air can be sent with a smaller force. The pumping efficiency of the bubble pump can be increased by operating the large discharge type air pump 15 from here and feeding more air.

  The pumped water is ejected from the nozzle 2. Electric power is generated by placing a hydraulic power generation device including an impulse water turbine 9 and a generator 10 ahead of this, water is stored in the pumping tank 3, and air is discharged from the exhaust port 4.

  Since water is pumped from the water receiving tank 7 to the pumping tank 3, a downward flow is generated in the hydraulic pipe 5, and the water is ejected from the nozzle 6. Electric power is generated by placing a hydraulic power generation device including an impulse water turbine 11 and a power generator 12 before the water is collected in the water receiving tank 7.

  The impulse water turbine 11 and the generator 12 are installed in the airtight chamber 8 to prevent submergence. In order to prevent air from leaking from the airtight chamber 8, the lower end of the water pressure pipe 5 is formed below the water surface of the water receiving tank 7, and a high pressure air pump 17 is installed in case the water level of the water receiving tank 7 rises.

  Since this is a hydroelectric power generation device that does not require a dam or a river and is not limited in installation location, it can be used as a private power generation device in ordinary households, factories, and other facilities.

It is the side view which showed the whole structure of the bubble pump pumping-type composite hydroelectric generator. It is sectional drawing which showed the pumping pipe internal structure of the bubble pump pumping-type composite hydroelectric generator.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pumping pipe 2 Nozzle 3 Pumping tank 4 Exhaust port 5 Water pressure pipe 6 Nozzle 7 Receiving tank 8 Airtight chamber 9 Impulse water wheel 10 Generator 11 Impulse water wheel 12 Generator 13 High pressure type air pump 14 Backflow prevention valve 15 Large discharge type air Pump 16 Backflow prevention valve 17 High pressure type air pump 18 Backflow prevention valve 19 Rectification plate

Claims (3)

  A combined hydroelectric generator that combines a hydroelectric generator that uses the force of water pumped up by a bubble pump from a pumping pipe and a hydroelectric generator that uses the force of the pumped water falling down a hydraulic pipe.   A bubble pump device consisting of a pumped-up pipe with a rectifying plate in the pipe, a high-pressure air pump for startup, and a large discharge air pump for operation.   A method for determining the inside diameter of a pumping pipe to design an energy efficient bubble pump.

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