JP6479721B2 - Underground water power generator and power generation method using underground water - Google Patents

Description

  The present invention relates to an underground water generator for generating electricity using underground water flowing over an impermeable layer in the ground and a power generation method using the underground water.

  As one of the power generation using underground water including underground water, a well was formed in a layer of pressurized groundwater that had no flow in the ground, and the hydroelectric energy of well water that self-sprayed from the well to the ground surface was used. A system has been proposed.

  For example, as shown in Patent Document 1, well water that springs from a self-injection well is sent to a power generation means via a water supply means including a well water transfer pipe and a power generation valve, and the well water is applied to the blades of the power generation means so that the high speed It was designed to generate electricity by rotating the shaft.

JP 2001-107343 A

  However, in the case of power generation using the hydro energy of the well water of a self-injection well, it is necessary to provide a drainage facility capable of draining constantly on the surface. In Patent Document 1, it is described that drainage is performed in an empty well and returned to the permeable layer in the ground, but drainage treatment is uncertain and cannot be used constantly. As described above, in the power generation using the well water of the self-injection well shown in Patent Document 1, there is a problem that the facility including the drainage facility becomes large and the cost is increased.

  Therefore, in view of the above circumstances, the present invention aims to prevent the underground water from being drained on the ground surface when generating power using underground water, and to provide a power generator that does not require a large facility. To do.

(Invention of Claim 1)
The present invention has been made in consideration of the above problems, and the lower intake (6) is located in the underground water layer (A) where the underground water flow (B) is located, and this intake (6) is the underground water. The outlet pipe (4) which opens toward the upstream side in the flow (B) direction of the underground water (B) of the bed (A) and the lower outlet (7) are located in the underground water layer (A). The lever outlet (7) is open toward the downstream side in the direction of the flow (B) of the underground water layer (A), and the flow of the underground water (B) in the underground water layer (A). The underflow water is drawn from the outlet (7) by drawing from the downstream side in the direction, and the underflow water taken at the intake (6) A conduit (2) that opens and returns from the outlet (7) to the underground water layer (A);
A generator (3) provided between the ground side part of the forward pipe part (4) and the ground side part of the return pipe part (5) in the pipe line (2),
The generator (3)
The original underground water layer from the water intake (7) of the return pipe part (5) through the pipe (2) from the intake pipe (6) of the outgoing pipe part (4) located in the underground water layer (A) The underground water in the pipeline (2) is not opened to the atmosphere of the underground water returning to (A), and the underground water in the pipe (2) is pulled from the downstream side of the downstream water flow (B) to the outlet (7) . The underground water layer (A) is drawn to the underground water layer (A) from the water outlet (7) that opens toward the downstream side in the flow (B) direction of the underground water, and in the pipeline (2). It is assumed that electricity is generated with the flow of underground water (C) generated continuously ,
The return pipe section (5) branches upstream in the direction of the downflow water flow (C) in the return pipe section (5), and from this branch portion in the direction of downflow water flow (C). A bypass pipe part (10) connected to the return pipe part (5) on the downstream side of
The bypass pipe (10) is attached with a pump (11) that feeds underground water filled in the bypass pipe (10) toward the water outlet (7), and the bypass pipe (10) is connected to the bypass pipe (10). An induced flow (D) of the underground water flowing out from the outlet (7) to the underground water layer (A) is generated, and the underground water is introduced into the pipe (2) by the induced flow (D) of the underground water. An underflow water power generation apparatus is provided, characterized in that a flow generation means (12) for generating a flow (C) is provided .

(Invention of Claim 2)
In the present invention, the generator (3) preferably has a turbine (8) rotated by the flow of downflow water in the pipe (2) .

(Invention of Claim 3)
Moreover, this invention positions the water intake (6) of one end in the underground water layer (A) with the flow (B) of underground water, and this water intake (6) is the said underground water of the underground water layer (A). It opens toward the upstream side in the direction of flow (B), and the water outlet (7) at the other end is positioned in the underground water layer (A), and this water outlet (7) is in the direction of flow (B) of the underground water. The pipe (2) that opens toward the downstream side of the water flows into the atmosphere of underground water that branches off from the underground water layer (A) and returns to the underground water layer (A) after passing through the surface. a flow opening, underflow water from said underflow water stream the conduit at pulling from downstream of (B) (2) subsoil water the outlets in (7) with respect to the outlets (7) Providing a flow (C) of subsidence water drawn into the layer (A) and continuously produced in the line (2);
A generator (3) is provided on the surface of the pipe (2),
The generator (3) generates electric power by converting kinetic energy of the flow (C) of the underground water generated continuously in the pipe (2) into electric energy,
The downflow water of the flow (C) in the pipe (2) is directly directed into the downflow water layer (A) in a non-open state with respect to the atmosphere toward the downstream in the flow (B) direction of the downflow water. Watering ,
The portion of the surface of the pipe line (2) that is downstream of the generator (3) in the direction of the flow (C) of the underground water branches off from the pipe line (2) and the underground water flows from this branch. A bypass pipe part (10) connected to the pipe line (2) on the downstream side in the direction of the flow (C) is attached,
The bypass pipe (10) is attached with a pump (11) that feeds underground water filled in the bypass pipe (10) toward the water outlet (7), and the bypass pipe (10) is connected to the bypass pipe (10). A flow generating means (12) is provided for generating an induced flow (D) of underground water flowing out from the outlet (7) to the underground water layer (A);
When the pipe (2), the generator (3), and the flow generating means (12) are filled with underground water having no flow, the flow is started by starting the pump (11) that performs the feeding operation. A power generation method using underground water characterized in that the underground water flow (C) is generated in the pipe (2) by the induced water (D) generated by the generating means (12). The power generation method using the underground water is provided to solve the above problems.

(Effect of the invention of claim 1)
According to the first aspect of the present invention, the non-floating water that returns from the outlet of the outgoing pipe located in the underground water layer in the underground to the original underground water layer from the outlet of the return pipe passes through the pipe line. Since power generation is performed in an open flow, there is no need to prepare facilities and facilities for drainage on the ground surface. As a result, the power generation facility can be made compact, which has an excellent effect.

  The underground water itself has a flow that moves to the lowland under pressure from the permeated water that continues to permeate into the highlands such as mountainous areas. And the intake port of the outgoing pipe part of the pipeline and the outlet of the return pipe part are located in the underground water layer with flow, and there is a flow of underground water from the intake port to the outlet, Underwater flows from the generator to the outlet between the generator and the outlet.

  In particular, the intake port opens toward the upstream side in the flow direction of the underground water, so that the underground water can be efficiently taken in by the water pressure of the flow. Also, the outlet is opened toward the downstream side in the flow direction of the underground water, so that it is forcibly drawn out by the action of the downstream water flow from the downstream side, so that the flow can be efficiently flowed into the pipeline. And it can pass continuously.

  Therefore, compared to the case where the loss increases due to the disturbance of the flow of the underground water against the generator, the underground water flow is caused by the underground water of the return flow of the return pipe for the generator. The effect of pulling the fluid from the downstream side in the direction is directly exerted to suppress the turbulence, and the kinetic energy of the fluid can be efficiently recovered by the generator, so that the power generation efficiency is improved.

(Effect of the invention of claim 2)
According to invention of Claim 2, since a generator has a turbine which rotates with the flow of underground water in a pipe line, there exists a merit that the kinetic energy of underground water in a pipe line can be collected more efficiently. is there.

(Effect of the invention of claim 3)
According to the invention of claim 3, the underground water on the downstream side in the flow direction from the generator is directly discharged into the underground water layer and returned by the pipe portion extending directly from the surface to the underground water layer. Therefore, it is not necessary to prepare facilities and facilities for draining on the surface of the earth, and an excellent effect is achieved that the power generation equipment can be made compact.

It is explanatory drawing which shows an example of the underground water power generator which concerns on this invention.

  Next, the present invention will be described in detail based on the embodiment shown in FIG. In the figure, reference numeral 1 denotes an underground water generator, and the underground water generator 1 can be installed on the surface of the land where underground water flows. As shown in FIG. 1, the underground water generator 1 includes a pipe 2 having both ends positioned in an underground water layer A in which underground water flows with pressure as shown in FIG. The generator 3 is provided in the middle of the pipeline 2.

(Pipe)
The pipe line 2 is composed of an outgoing pipe part 4 and a return pipe part 5, and the generator 3 is provided between an end on the ground side in the outgoing pipe part 4 and an end part on the ground side of the return pipe part 5. Are provided, and the ground side portions of the forward pipe portion 4 and the return pipe portion 5 are connected via the generator 3.

  In addition, the water intake 6 of the outgoing pipe 4 that is one end of the pipe 2 is located in the underground water layer A, and the water outlet 7 of the return pipe 5 that is the other end of the pipe 2 is in the underground water layer A. And the downstream water in the flow direction B of the underground water with respect to the position of the water intake 6, the underground water taken in by the water intake 6 is not open to the atmosphere and the water outlet 7. To flow C returning to the underground water layer A.

  That is, the flow C of the underground water from the intake port 6 on the upstream side in the flow direction B of the underground water to the outlet 7 on the downstream side in the flow direction B of the underground water through the generator 3 is The flow of the underground water in the water layer A is the same as the flow direction B.

(Generator)
The generator 3 has a turbine 8 that is rotated by the flow of underground water in the pipe 2, and the rotational force of the turbine 8 is transmitted to a power generation mechanism (not shown) such as rotating a rotor core in a stator coil. Therefore, the kinetic energy of the flow of underground water can be converted into electric energy and output.

  Although the horizontal axis propeller turbine type is schematically shown as the turbine 8 in the figure, the turbine is not limited to the horizontal axis propeller turbine type, and a known one can be used. (Ministry of Economy, Trade and Industry, Agency for Natural Resources and Energy, “Form of Watermill” http://www.enecho.meti.go.jp/category/electricity_and_gas/electric/hydroelectric/mechanism/waterwheel/reference)

  A connector 9 for connecting the generator 3 to the forward pipe portion 4 and the return pipe portion 5 is provided before and after the flow direction of the downflow water of the generator 3. 3 includes a valve that opens and closes the pipe 2 when it is attached to and detached from the pipe 2 for maintenance and the like.

(Flow guiding means)
Also in the above line 2, devised for the orientation of the flow underflow water flows toward the outlets 7 from the intake port 6 that have been subjected. In this embodiment, an example of the device is shown. As shown in the drawing, the return pipe 5 branches to the upstream side of the flow C in the return pipe 5, and the branch A bypass pipe portion 10 connected to the return pipe portion 5 is attached downstream from the portion in the direction of the flow C.

  Furthermore, a pump 11 is attached to the bypass pipe portion 10 so as to send out the underground water filled in the bypass pipe portion 10 toward the water discharge port 7, and a flow is generated between the bypass pipe portion 10 and the pump 11. Means 12 are formed, and when the conduit 2, the generator 3 and the flow generating means 12 are filled with underflow water in the absence of flow (for example, the power generation action of the generator 3 occurs) By operating the flow generating means 12 by power supply from a power source (not shown) at the previous time (starting of the pump 11), the underground water flowing from the outlet 7 to the underground water layer A through the bypass pipe 10 An induced flow D is generated, and the flow C of the underground water is provided along with the induced flow D. In addition, after the said flow C arises with the induced flow D, the induced flow D may stop (disappear) and the operation | movement of the pump 11 in the flow generation means 12 becomes unnecessary. (Power supply to the pump 11 is also unnecessary)

Thus, in the embodiment, when performing power generation using underground water, first, the water intake 6 at one end is positioned in the underground water layer A and the water outlet 7 at the other end is positioned in the underground water layer A. A pipe line 2 is provided. And the underground water flow C made open to the atmosphere by the pipeline 2 is provided, and the underground water in the pipeline 2 that branches from the underground water layer A and passes through the surface portion is the underground water layer. The flow of underground water B around the outlet 7 in A is pulled to the underground water layer A by the action of pulling from the downstream side of the downstream water B so that a continuous flow C is generated in the pipe 2. ing.

  Then, power is generated by a generator that converts the kinetic energy of the flow C of the underground water that has not been opened to the atmosphere at the surface to electrical energy, and the downstream of the underground water flow direction in the pipeline by the pipe 2 The underground water flowing toward the underground water layer A, that is, the underground water returning to the underground water layer A is directly discharged into the underground water layer A in a non-open state with respect to the atmosphere. As a result, it is not necessary to prepare facilities and facilities for draining on the surface of the earth as described above, and the power generation equipment can be made compact.

DESCRIPTION OF SYMBOLS 1 ... Underflow water power generation device 2 ... Pipe line 3 ... Generator 4 ... Outgoing pipe part 5 ... Return pipe part 6 ... Intake port 7 ... Outlet 8 ... Turbine 9 ... Connector 10 ... Bypass pipe part 11 ... Pump 12 ... Flow Generation means A ... Underflow water layer B ... Flow direction of underground water in the underground water layer C ... Flow of underground water in the pipeline D ... Induction flow

Claims (3)

The bottom water intake (6) is located in the underground water layer (A) where the underground water flow (B) is located, and this water intake (6) is the direction of the underground water flow (B) in the underground water layer (A). The outlet pipe (4) that opens toward the upstream side at the bottom and the underflow water layer (A) is located at the lower outlet (7), and this outlet (7) is the underground water layer (A). Is open toward the downstream side in the flow (B) direction of the underground water, and the underground water is drawn by pulling from the downstream side in the flow (B) direction of the underground water layer (A). It consists of a return pipe part (5) drawn out from the water discharge port (7), and the underground water taken in at the water intake port (6) is not open to the atmosphere, and the underground water layer ( A pipeline (2) returning to A),
A generator (3) provided between the ground side part of the forward pipe part (4) and the ground side part of the return pipe part (5) in the pipe line (2),
The generator (3)
The original underground water layer from the water intake (7) of the return pipe part (5) through the pipe (2) from the intake pipe (6) of the outgoing pipe part (4) located in the underground water layer (A) The underground water in the pipeline (2) is not opened to the atmosphere of the underground water returning to (A), and the underground water in the pipe (2) is pulled from the downstream side of the downstream water flow (B) to the outlet (7) . The underground water layer (A) is drawn to the underground water layer (A) from the water outlet (7) that opens toward the downstream side in the flow (B) direction of the underground water, and in the pipeline (2). It is assumed that electricity is generated with the flow of underground water (C) generated continuously ,
The return pipe section (5) branches upstream in the direction of the downflow water flow (C) in the return pipe section (5), and from this branch portion in the direction of downflow water flow (C). A bypass pipe part (10) connected to the return pipe part (5) on the downstream side of
The bypass pipe (10) is attached with a pump (11) that feeds underground water filled in the bypass pipe (10) toward the water outlet (7), and the bypass pipe (10) is connected to the bypass pipe (10). An induced flow (D) of the underground water flowing out from the outlet (7) to the underground water layer (A) is generated, and the underground water is introduced into the pipe (2) by the induced flow (D) of the underground water. The underground flow water generator characterized by the flow generation means (12) which produces the flow (C) .   The underground water generator according to claim 1, wherein the generator (3) has a turbine (8) that is rotated by the flow of underground water in the pipe (2). The intake (6) at one end is positioned in the underground water layer (A) where the underground water flow (B) is located, and the intake water (6) is in the direction of the underground water flow (B) in the underground water layer (A). The water outlet (7) at the other end is located in the underground water layer (A) and the water outlet (7) is located downstream in the direction of the underground water flow (B). It is a non-open flow to the atmosphere of underground water that branches off from the underground water layer (A) and returns to the underground water layer (A) after branching from the underground water layer (A) and returning to the underground water layer (A). Te, said outlets the conduit (2) subsoil water layer from subsoil water the water discharge port (7) in at pulling from downstream of the underflow water stream (B) with respect to (7) (a) in A flow (C) of underground water that is drawn out to the pipe (2) and continuously generated in the pipe (2),
A generator (3) is provided on the surface of the pipe (2),
The generator (3) generates electric power by converting kinetic energy of the flow (C) of the underground water generated continuously in the pipe (2) into electric energy,
The downflow water of the flow (C) in the pipe (2) is directly directed into the downflow water layer (A) in a non-open state with respect to the atmosphere toward the downstream in the flow (B) direction of the downflow water. Watering ,
The portion of the surface of the pipe line (2) that is downstream of the generator (3) in the direction of the flow (C) of the underground water branches off from the pipe line (2) and the underground water flows from this branch. A bypass pipe part (10) connected to the pipe line (2) on the downstream side in the direction of the flow (C) is attached,
The bypass pipe (10) is attached with a pump (11) that feeds underground water filled in the bypass pipe (10) toward the water outlet (7), and the bypass pipe (10) is connected to the bypass pipe (10). A flow generating means (12) is provided for generating an induced flow (D) of underground water flowing out from the outlet (7) to the underground water layer (A);
When the pipe (2), the generator (3), and the flow generating means (12) are filled with underground water having no flow, the flow is started by starting the pump (11) that performs the feeding operation. A power generation method using underground water, wherein the underground water flow (C) is generated in the pipe (2) by the induced water (D) generated by the generating means (12) .

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