JP6016007B2 - Micro hydro power generation system - Google Patents

Description

  The present invention relates to a small-scale hydroelectric power generation system, and more particularly to a pumped-type micro hydroelectric power generation system that generates power using a water flow that falls from a water tank provided above and passes through a pipe.

  Generally, a hydroelectric power generation system is configured to drop water from a high place, rotate the water turbine by the velocity impact of the falling water and the gravity pressure of the water, and transmit the shaft rotational force of the water turbine to the generator to generate power. have. The falling water after rotating the water wheel is discharged because it has lost its potential energy.

  In recent years, a small-scale power generation system that uses the hydropower of flowing water flowing through a water channel such as a water pipe provided in a building, a water supply pipe or a drain pipe of a factory has been proposed and attracted attention (for example, Patent Document 1). .

  The power generation system described in Patent Document 1 connects a pump connected to a water pipe provided outside the building, a rooftop water tank installed on the rooftop of the building, and a pump and the rooftop water tank. It has a waterway, a waterway that leads the water from the rooftop water tank to an arbitrary position of the building, and a plurality of generators provided in the middle of the waterway. When the water pumped up by the pump is used in the building, electricity is generated by the falling water from the rooftop water tank.

  Further, in this power generation system, a power storage device that stores electricity generated by the generator is provided. By applying the obtained electric energy to a part of the electric energy consumed in the building, it is possible to save power and reduce the maintenance cost of the building.

JP 2005-273466 A

  However, in the power generation system described in Patent Document 1, since a commercial power source is used to drive the pump, power cannot be continuously generated when a power failure occurs during a disaster such as an earthquake. Also, because the pump is located in the basement of the building, a large amount of energy was required to pump water into the rooftop water tank. Furthermore, when water is used in the building, power generation is possible due to falling water from the rooftop water tank, but power generation was not possible when water was not used. Furthermore, the water after being used in the building is only discharged as waste water and cannot be reused at all.

  Therefore, the present invention solves the above-mentioned problems of the prior art, and an object of the present invention is to provide a micro power supply that can continuously generate power and supply power to a certain extent at the time of a power failure, and can circulate and use water. It is to provide a hydroelectric power generation system.

  According to the present invention, a micro hydroelectric power generation system includes a water storage tank that stores water, a water guide pipe that is disposed below the water storage tank, and has one end communicating with the water storage tank and descending toward the other end. A condensate pipe communicating with the other end of the water conduit and rising toward the other end, a plurality of power generation units provided in the middle of the water conduit and using the water flow flowing through the water conduit; Connected to the other end of the water pipe and connected to a pump that discharges the water in the condensate pipe into the water storage tank and a plurality of power generation units. And a power supply device for supplying the power. In particular, according to the present invention, the suction force generated by the pump discharging the water in the condensate pipe generates a uniform suction flow in the condensate pipe and the conduit pipe so as to form the above-described water stream flowing through the conduit pipe. It is configured.

  In this way, the water in the condensate pipe and the conduit pipe moves due to the force sucked into the gap generated by the pump discharging the water in the condensate pipe, and the water in the condensate pipe and the conduit pipe is based on the principle of siphon. Until it returns to the equilibrium state, it circulates in the pipe as a uniform suction flow in a reduced pressure state. For this reason, a circulating water flow can be formed with relatively small energy, and water is circulated in the pipe by being sucked by the negative pressure generated by the pump. A space close to a vacuum that does not inhibit rotation can be formed. As a result, a micro power generation system that uses water from the water storage tank to efficiently generate electricity with very little energy consumption and returns the generated water to the water storage tank for circulation, as well as an emergency power source in the event of a disaster. That is, by packaging the energy conversion process in a simple and compact manner, it can supply the required amount of electricity according to the application as a regional distributed generator in smart communities, and does not require advanced maintenance skills. More people can participate in the energy supply process as a device that implements device assembly by regional companies and performs periodic maintenance inspections.

  The pump is preferably configured to pump the water in the condensate pipe by a difference in height between the water surface in the condensate pipe and the water surface in the water storage tank. As described above, the water surface in the condensate pipe and the water surface in the water storage tank are in the same plane and kept in an equilibrium state by the principle of the inverse siphon, and the pump only needs to lift water by a slight height. For this reason, the amount of energy consumed by the pump is very small.

  It is also preferable that each of the plurality of power generation units includes a turbine unit having a turbine blade configured to rotate by a water flow, and a generator unit that converts the rotational force of the turbine blade into electricity. The water wheel blade is configured to efficiently receive the kinetic energy of the water flow and convert it into rotational motion.

  In this case, the generator unit includes a rotating magnet plate having a plurality of first-polar permanent magnets and a plurality of first polarities that are stationary against a part of the plurality of first-polar permanent magnets. Permanent magnets, a plurality of coils with magnetic cores whose one ends are opposed to a part of the C permanent magnets of the rotating magnet plate, and a plurality of second coils which are stationary and opposed to the other ends of the plurality of coils with magnetic cores. More preferably, the permanent magnet is configured to reduce cogging torque due to the plurality of first permanent magnets of the rotating magnet plate. Since the generator unit is configured to reduce the cogging torque to reduce the rotational resistance by the permanent magnet as much as possible, the rotational motion can be converted into electric power more efficiently.

  It is also preferable that the power supply device includes a storage battery capable of charging power generated by a plurality of power generation units.

  According to the present invention, the water in the pipe is pumped up by the pump installed at a position higher than the water surface of the water tank, returned to the water tank, and the circulating water flow is formed, thereby forming the circulating water flow with relatively small energy. Can be generated more efficiently. In addition, when a commercial power source cannot be used during a disaster such as an earthquake, power can be generated. Furthermore, water can be recycled and costs can be reduced.

  In addition, the present invention converts fluid flow into electrical energy, does not require large-scale construction, is environmentally friendly, and is an application that requires a small amount of power as a regional distributed power generation system in a smart grid. It can be handled, has excellent safety, and can be easily managed. Moreover, the micro hydroelectric power generation system of the present invention is compact and can be easily installed on the upper part (for example, the rooftop) of a building.

1 is a diagram schematically showing a configuration of a micro hydroelectric power generation system as an embodiment of the present invention. FIG. 1 is a cross-sectional view schematically illustrating a configuration of a power generation unit in the embodiment. It is a figure which shows schematically the structure of the water turbine part in the electric power generation unit shown in FIG. It is a figure explaining the structure of the waterwheel blade in the waterwheel part shown in FIG. It is a figure which shows schematically the structure of the generator part in the electric power generation unit shown in FIG. It is a figure explaining the arrangement | sequence and effect | action of a magnet in the generator part shown in FIG. It is a figure which shows roughly the structure of a micro hydroelectric power generation system as other embodiment of this invention. It is a figure which shows an example of the structure of a water conduit, and arrangement | positioning of an electric power generation unit. It is a figure which shows the other example of the structure of a water conduit, and arrangement | positioning of an electric power generation unit. It is a figure which shows the further another example of the structure of a water conduit, and arrangement | positioning of an electric power generation unit. It is a figure which shows the structure of a water conduit, and the further another example of arrangement | positioning of an electric power generation unit. It is a figure which shows schematically the structure of the water turbine part in the electric power generation unit shown in FIG. It is AA sectional view taken on the line of FIG.

  Hereinafter, an embodiment of a micro hydroelectric power generation system according to the present invention will be described with reference to the drawings.

  FIG. 1 schematically shows the configuration of a micro hydroelectric power generation system as an embodiment of the present invention.

  As shown in the figure, the micro hydroelectric power generation system of the present embodiment is provided above the system and has a water storage tank 10 in which water 11 is stored, and one end communicates with the vicinity of the bottom surface of the water storage tank 10. The water conduit 12 descending toward the other end, and the condensate tube 13 having one end communicating with the other end at the lowest position of the water conduit 12 and rising substantially vertically toward the other end. And a pumping pump 14 connected to the other uppermost end of the condensate pipe 13 via a valve 14a, and a plurality of power generation units 15 provided in the middle of the water conduit 12 and each unitized. A power supply device 16 electrically connected to the power generation unit 15 and the pumping pump 14, a water supply pipe 17 for supplying water 11 to the water storage tank 10 at the initial stage, and the other end of the condensate pipe 13, First, water enters the condenser 13 And a drain valve 18 to discharge only open residual air and water when entering externally.

  The water storage tank 10 is for storing, for example, circulating water 11 such as tap water, and tap water or the like is supplied and stored through the water supply pipe 17 as the initial water 11. The storage capacity of the water tank 10 is determined based on the power generation amount of the entire system.

  The water guide pipe 12 is disposed below the water storage tank 10 and descends in a straight line obliquely from one end, which is the upper end thereof, to become the lowest other end. The length of the water conduit 12 is set such that a required number of power generation units 15 can be incorporated. One end of the condensate pipe 13 at the lowest position communicates with the other end of the water conduit 12, and the condensate pipe 13 rises substantially vertically toward the other end at the highest position. The water guide pipe 12 and the condensate pipe 13 are kept in a watertight state throughout the entire length except for the water storage tank 10. The diameter of the water conduit 12 is set so that the required flow rate is obtained, but the diameter of the condensate pipe 13 is set larger than the diameter of the water conduit 12.

The pumping pump 14 is connected to the upper end of the condensate pipe 13 and pumps up the water 11 rising into the condensate pipe 13 and returns it to the water storage tank 10 to form a circulating water flow. As the pumping pump 14, for example, a circulation pump HB-1500 of FOK Co., Ltd. is applicable. This pump has specifications that the maximum pumping amount is 35 to 40 m ³ / H, the power consumption is 127 to 165 W, the maximum head is 25 cm, and the pumping amount at the maximum head is 30 to 35 m ³ / H. This pump is a self-priming pump, and by pumping water only to this pump prior to operation, after the operation has started, the air in the suction pipe is discharged and pumped by the pump itself. be able to.

  In this embodiment, the pumping pump 14 is installed at a position slightly higher than the water surface above the condensate pipe 13, and is set so that the height to be pumped is very low. The water surface in the condensate pipe 13 and the water surface in the water storage tank 10 are in the same plane and kept in an equilibrium state by the principle of the inverse siphon when the pumping pump 14 is not operated. Accordingly, the water pump 14 discharges the water 11 at the upper part of the condensate pipe 13 into the water storage tank 10 by pumping only a slight height, for example, a height H = 10 to 20 cm. The water in the condensate pipe 13 and the conduit pipe 12 is moved and circulated by the force sucked into the gap generated by the pumping pump 14 discharging the water 11 in the condensate pipe 13.

  The water in the condensate pipe 13 and the conduit pipe 12 circulates in the pipe as a uniform suction flow in a reduced pressure state until it returns to an equilibrium state by the principle of siphon. In addition, by adjusting the discharge flow rate of the pumping pump 14, the power generation amount can be adjusted by changing the speed of the water flow in the water conduit 12.

  The plurality of power generation units 15 are sequentially provided in the middle of the water conduit 12 and generate power using the water flow in the water conduit 12. Each power generation unit 15 is connected to the water turbine unit configured to rotate by capturing the water flow in the water conduit 12 as efficiently as possible, and a generator that converts the rotational force of the water turbine unit into electric power. Part. The configuration of each power generation unit 15 will be described later in detail. In the present embodiment, three power generation units 15 are provided along the water conduit 12. The number of power generation units is set based on the required power generation amount.

  The power supply device 16 is mainly composed of a charging circuit and a chargeable / dischargeable storage battery. The power supply device 16 charges the storage battery with the power generated by the plurality of power generation units 15, and outputs the output power of the storage battery to the pumping pump 14. It is configured to be used for driving and output to the outside. As power for charging the power supply device 16, in addition to power from the plurality of power generation units 15, power from a solar power generation system and / or a wind power generation system can be used. The power supply device 16 may be directly connected to a commercial power source. When the storage battery is charged and operated using economical energy such as late-night power, the pumping pump 14 may be driven by the storage battery.

  FIG. 2 schematically shows a configuration of the power generation unit 15 in the present embodiment, FIG. 3 schematically shows a configuration of the water turbine unit 20 in the power generation unit 15, and FIG. Explains the structure of the turbine blade.

  As shown in FIG. 2, the power generation unit 15 includes a water turbine unit 20 and a rotation shaft 21 a connected to the rotation shaft 20 a of the water wheel unit 20, and a generator that converts the rotational force generated by the water wheel unit 20 into electric power. Part 21.

  The water turbine unit 20 is provided on the inner side of the rotating shaft 20a, the housing 20b, and the opposite side walls of the housing 20b, and a pair of bearing members (seal bearings) that rotatably support the rotating shaft 20a. 20c and a turbine blade 20d fixed coaxially to the rotary shaft 20a. A part of the water wheel blade 20d protrudes into the water guide tube 12, and is configured to be rotationally driven by a water flow 11a flowing through the water wheel blade 12d. This water flow 11 a is generated in the water conduit 12 when water is sucked into the negative pressure generated by the operation of the pumping pump 14. In addition, since it is non-compressible and has a steady flow, it circulates as a flow that satisfies Bernoulli's theorem.

  As shown in FIG. 3, a negative pressure is generated in the interior 20e of the housing 20b in the water turbine section 20 by the water flow 11a on the same stream line in which the Bernoulli's theorem that flows in the water conduit 12 is established, and this interior 20e is further vacuumed. Therefore, the rotational resistance of the water turbine blade 20d is reduced.

As shown in FIG. 4, in the present embodiment, water wheel blades _20d 1 _{~20d 8} around the eight sheets at equal angular intervals of 45 ° of the rotating shaft 20a is provided, these water wheel blades _20d 1 _{~20d 8} Each of these is comprised from the flat plate-shaped lightweight metal material or resin material which has a cross section which has a moderate curvature radius. As shown in FIG. 4, so that the other one water wheel vanes 20d ₃ when the pressure receiving area is maximized for one flow 11a of conduit 12 of the water turbine vanes 20d ₁ protrudes from the housing 20b in conduit 12 Thus, the water turbine blade 20d can efficiently receive the kinetic energy of the water flow 11a and convert it into rotational motion.

  FIG. 5 schematically shows the configuration of the generator unit 21 in the power generation unit 15 of the present embodiment, and FIG. 6 explains the arrangement and operation of the magnets in the generator unit 21.

As shown in FIG. 5, the generator unit 21 includes a rotating shaft 21a connected to the rotating shaft 20a of the water wheel unit 20, a rotating magnet plate 21b fixed to the rotating shaft 21a, and rotating coaxially therewith. It has. The rotary magnet plate 21b is provided with _eight permanent magnets 21c _{1 to} 21c 8 arranged at equal intervals of 45 ° in the circumferential direction of the shaft so that only the S pole appears on the surface.

A plurality of magnetic cores 21d _{1 to} 21d ₄ are provided so that one end thereof faces the permanent magnets 21c _{1 to} 21c ₈ of the rotating magnet plate 21b. However, the plurality of magnetic cores 21d _{1 to} 21d ₄ are fixed to the fixing portion 21e and are stationary. In the present embodiment, the plurality of magnetic cores 21d _{1 to} 21d ₄ are composed of _four magnetic cores 21d _{1 to} 21d 4 arranged at equal intervals of 90 ° in the circumferential direction of the shaft. These include a plurality of magnetic cores _21d 1 _{~21d 4,} a plurality of coils _21f 1 _{~21f 4} are wound, respectively. Furthermore, only the opposite S pole permanent magnets of the rotating magnet plate 21b is four permanent magnets 21g ₁ ~21g ₄ appearing on the surface are provided stationary fixed to the fixing portion 21e. These four permanent magnets 21g _{1 to} 21g ₄ are arranged at equal intervals of 90 ° in the circumferential direction of the shaft, and are respectively provided between the _four magnetic cores 21d _{1 to} 21d ₄ . Therefore, in opposition to the permanent magnet _21c 1 _{~21c 8} 45 ° ₈ one arranged at equal intervals in the rotational magnetic plate 21b, and four core _21d 1 _{~21d 4} and four permanent magnets _21g 1 _{~21g 4} is They are alternately arranged at an equal interval of 45 °.

Moreover, the generator unit 21 of the present embodiment is arranged at equal intervals of 90 ° around the direction of the axis so as to appear to the four core 21d ₁ ~21d ₄ other end face only N poles the surface to the Four permanent magnets 21h _{1 to} 21h ₄ are provided. However, these four permanent magnets 21h _{1 to} 21h ₄ are fixed to the fixing portion 21e and are stationary. Four core _21d 1 ～21D ₄ and the four coils _21f 1 ～21F _4, each end faces the eight permanent magnets _21c 1 ～21C ₈ of the rotating magnetic plate 21b, placed in the respective one of the other end The four permanent magnets 21h _{1 to} 21h ₄ are arranged at equal intervals of 90 ° in the circumferential direction of the shaft so as to face the _four permanent magnets 21h _{1 to} 21h ₄ , and the electromotive forces obtained from the coils 21f _{1 to} 21f ₄ are synthesized. Are connected so that the generator output is obtained.

  The generator unit 21 is a generator in which the cogging torque is reduced to reduce the rotational resistance by the permanent magnet as much as possible. The principle of the generator unit 21 is disclosed in, for example, International Publication No. WO2003 / 056688. Hereinafter, an outline of the operation of the generator unit 21 of the present embodiment will be described.

By eight permanent magnets _21c 1 _{~21c 8} of the rotating magnet plate 21b rotates, the magnetic poles to be applied to the four core _21d 1 _{~21d 4} is changed alternately, the direction of magnetic flux crossing the magnetic core in the axial direction continuously electromotive force is generated in the four coils _21f 1 _{~21f 4} by alternately reversed.

Figure 6 shows schematically a part of a cross-section of the generator unit 21, four core _21d 1 _{~21d 4} and four permanent magnets _21g 1 _{~21g 4} and four permanent magnets 21h ₁ ~21h ₄ is still The permanent magnets 21c _{1 to} 21c ₈ of the rotating magnet plate 21b are moved by rotation. The rotational movement direction (from bottom to top) of the permanent magnets 21c _{1 to} 21c ₈ of the rotary magnet plate 21b is indicated by an arrow.

In the state shown in FIG. 6, the permanent magnets _21c of the rotating magnetic plate 21b _1, 21c 3, 21c ₅ and 21c ₇ are directly facing to one end of the magnetic core _21d 1 _{~21d 4,} these magnetic cores _21d 1 _{~21d 4} Maximum attractive force is applied. On the other hand, the permanent magnets 21c ₂ , 21c ₄ , 21c ₆ and 21c ₈ of the rotating magnet plate 21b face the permanent magnets 21g _{1 to} 21g ₄ , respectively, and the rotating magnet plate 21b has the maximum from the permanent magnets 21g _{1 to} 21g _4. The repulsive force is applied.

When rotary magnet plate 21b is rotated from this state, the suction of the permanent magnet _21g 1 repulsive force and following the permanent magnet _21c 2 from ~21g _4, 21c _4, 21c _6, and 21c ₈ and the magnetic core _21d 1 _{~21d 4} The cogging torque that is an attractive force applied to the rotating shaft 21a is reduced by the force. The same thing occurs between the other permanent magnet and the magnetic core of the rotating magnet plate 21b. In other words, the maximum value of the cogging torque applied to the rotating shaft 21a is not reduced, but the time during which the permanent magnets 21c _{1 to} 21c ₈ are attracted to the magnetic cores 21d _{1 to} 21d ₄ by a strong attractive force is shortened.

  Thus, according to the generator unit 21 of the present embodiment, the maximum value of the cogging torque applied to the rotating shaft 21a does not vary, but the time during which the cogging torque strongly affects the rotating shaft 21a is shortened. Coupled with the fact that the cycle of the cogging torque is halved, the rotational resistance of the rotating shaft 21a is reduced and the rotation becomes smooth. Note that the numbers of permanent magnets and magnetic cores in the present embodiment are not limited to the values described above.

  As described above, in the present embodiment, the water surface in the condensate pipe 13 and the water surface in the water storage tank 10 are in the same plane and kept in an equilibrium state by the principle of the inverse siphon (pumping pump 14 The pumping pump 14 is set so that the height to be pumped by the pumping pump 14 is very low, so that the pumping pump 14 has only a slight height, for example, the height H = 10 to 20 cm. Just pump up. For this reason, the amount of energy consumed by the pumping pump 14 is very small. The water in the condensate pipe 13 and the conduit pipe 12 is moved by the force sucked into the gap generated by the pumping pump 14 discharging the water 11 in the condensate pipe 13, and the water in the condensate pipe 13 and the conduit pipe 12 is moved. Circulates in the pipe as a uniform suction flow under reduced pressure until it returns to equilibrium due to the principle of siphon. In other words, since it is non-compressible and has a steady flow, it circulates as a flow that satisfies Bernoulli's theorem. For this reason, a circulating water flow can be formed with relatively small energy, and since water is circulated in the pipe by being sucked by the negative pressure generated by the pumping pump 14, the water turbine unit 20 in the power generation unit 15 A space close to a vacuum that does not impede the rotation of the blade 20d can be formed. Further, the water wheel blade 20d is configured so as to efficiently receive the kinetic energy of the water flow 11a and convert it into rotational motion. Furthermore, the generator unit 21 in the power generation unit 15 is configured to reduce the cogging torque and reduce the rotational resistance due to the permanent magnet as much as possible.

  As a result, the micro hydroelectric power generation system of the present embodiment uses the water in the water storage tank 10 to efficiently generate power with very little energy consumption, and returns the water after the power generation to the water storage tank 10 for circulation use. As a power generation system, not only emergency power supply in the event of a disaster, but also the energy conversion process is packaged in a simple and compact manner, providing the necessary amount of electricity according to the application as a regional distributed generator in smart communities. In addition, as a device that does not require advanced maintenance skills and that implements device assembly by regional companies and performs periodic maintenance inspections, more people can participate in the energy supply process.

  In addition, it is expected to be used for a long time as a product against the background of natural energy when used in combination with various other micro-energy such as sunlight and midnight power. Furthermore, the micro power generation system of this embodiment is effective even when the scale of the entire system is expanded, and can be applied to large-scale power generation by utilizing a larger water resource. Furthermore, since the micro power generation system of the present embodiment circulates and uses water, the cost can be reduced.

  FIG. 7 schematically shows the configuration of a micro hydroelectric power generation system as another embodiment of the present invention.

  The micro hydroelectric power generation system according to the present embodiment is the same as the micro hydroelectric power generation system according to the embodiment shown in FIG. 1 except that a discharge amount adjusting pump 19 is added between the condensate pipe 13 and the water storage tank 10. It has the exact same configuration. Therefore, in FIG. 7, the same reference numerals are given to the same components as those in FIG.

  The discharge amount adjusting pump 19 is for adjusting the discharge amount in order to give an appropriate flow to the water discharged by the pumping pump 14, and adjusts the discharge amount and the natural water flow generated in the water pipe. Have a role. When an appropriate water flow (a water flow that balances the suction force and the pushing force (falling force)) is generated by adjusting the discharge amount, a water turbine is installed in the water turbine unit 20 of the power generation unit 15 provided in the middle of the water conduit 12. A space close to a vacuum that does not impede the rotation of the blade 20d can be formed.

  Other functions and effects of this embodiment are the same as those of the embodiment of FIG.

  FIG. 8 shows an example of the structure of the water conduit and the arrangement of the power generation units as a modification of the above-described embodiment.

  In this modification, seven power generation units 85 similar to those in the above-described embodiment are provided along the water conduit 82. The configuration other than the configuration of the water guide pipe 82 and the arrangement of the power generation unit 85 is the same as that of the micro hydroelectric power generation system in the above-described embodiment, and thus detailed description thereof is omitted.

  The water guide pipe 82 includes a vertical portion 82a directly below the water storage tank 10, a first horizontal portion 82b that follows this, a first inclined portion 82c that follows this, a second horizontal portion 82d that follows this, This is a bent pipe line having a second inclined part 82e that follows and a third horizontal part 82f that follows the second inclined part 82e. Two power generation units 85 are disposed on the first horizontal portion 82b, the first inclined portion 82c, and the second inclined portion 82e of the water conduit 82, respectively, and one power generation unit 85 is disposed on the second horizontal portion 85d. ing. By disposing the power generation unit 85 also on the first inclined portion 82c and the second inclined portion 82e of the water conduit 82, it is possible to secure more arrangement locations.

  The entire length of the water conduit 82 is appropriately designed so that the required power generation unit 85 can be incorporated. Moreover, the thickness of the water conduit 82 is designed based on the water flow rate according to the amount of power generation.

  FIG. 9 shows an example of the structure of the water conduit and the arrangement of the power generation units as another modification of the above-described embodiment.

  In this modification, six power generation units 95 similar to those in the above-described embodiment are provided along the water conduit 92. The configuration other than the configuration of the water conduit 92 and the arrangement of the power generation unit 95 is the same as that of the micro hydroelectric power generation system in the above-described embodiment, and thus detailed description thereof is omitted.

  The water guide pipe 92 includes a first vertical portion 92a immediately below the water storage tank 10, a first horizontal portion 92b that follows this, a second vertical portion 92c that follows this, and a second horizontal portion 92d that follows this. And a third vertical portion 92e following this, a third horizontal portion 92f following this, a fourth vertical portion 92g subsequent thereto, and a fourth horizontal portion 92h subsequent thereto. It is. Two power generation units 95 are disposed in each of the first horizontal portion 92b, the second horizontal portion 92d, and the third horizontal portion 92f of the water conduit 92.

  The entire length of the water conduit 92 is appropriately designed so that the required power generation unit 95 can be incorporated. Moreover, the thickness of the water conduit 92 is designed based on the water flow rate according to the power generation amount.

  FIG. 10 shows an example of the structure of the water conduit and the arrangement of the power generation units as still another modification of the embodiment described above.

  In this modification, eight power generation units 105 similar to those in the above-described embodiment are provided along the water conduit 102. The configuration other than the configuration of the water guide tube 102 and the arrangement of the power generation units 105 and 115 is the same as that of the micro hydroelectric power generation system in the above-described embodiment, and thus detailed description thereof is omitted.

  The water conduit 102 is a bent pipe having a vertical portion 102a directly below the water storage tank 10, a single long inclined portion 102b following the vertical portion 102a, and a single horizontal portion 102c following the single long inclined portion 102b. Four power generation units 105 are disposed on the inclined portion 102b of the water conduit 102, and four power generation units 115 are disposed on the horizontal portion 102c. The configuration of each power generation unit 115 will be described in the following modification of FIG.

  The overall length of the water conduit 102 is appropriately designed to such an extent that the required power generation units 105 and 115 can be incorporated. Moreover, the thickness of the water conduit 102 is designed based on the water flow rate according to the power generation amount.

  FIG. 11 shows an example of the structure of the water conduit and the arrangement of the power generation unit as still another modification of the above-described embodiment, and FIG. 12 schematically shows the configuration of the water turbine unit in the power generation unit of the modification of FIG. FIG. 13 shows a cross section taken along line AA of FIG.

  In this modification, six power generation units 115 having a structure different from that in the above-described embodiment are provided along the water conduit 112. The configuration of the water conduit 112 and the configuration other than the configuration and arrangement of the power generation unit 115 are the same as those of the micro hydraulic power generation system in the above-described embodiment, and thus detailed description thereof is omitted.

  The water conduit 112 includes a first vertical portion 112a immediately below the water tank 10, a U-shaped first horizontal portion 112b following the first vertical portion 112b, a first inclined portion 112c following the first vertical portion 112c, and a U-shape following the first inclined portion 112c. -Shaped second horizontal portion 112d, followed by a second inclined portion 112e, followed by a U-shaped third horizontal portion 112f, followed by a second vertical portion 112g, followed by This is a three-dimensional bent conduit having a fourth horizontal portion 112h. Two power generation units 115 are arranged in the first horizontal portion 112b, the second horizontal portion 112d, and the third horizontal portion 112f of the water conduit 112, respectively. By making the water conduit 112 into a three-dimensional bent conduit, a large number of places where the power generation unit 115 is disposed can be secured.

  The entire length of the water conduit 112 is appropriately designed so that the required power generation unit 115 can be incorporated. Moreover, the thickness of the water conduit 112 is designed based on the water flow rate according to the power generation amount.

  As shown in FIG. 13, the power generation unit 115 includes a water turbine unit 120 and a rotation shaft 21 a connected to the rotation shaft 120 a of the water wheel unit 120, and a generator that converts the rotational force generated by the water wheel unit 120 into electric power. Part 21. In this modification, the configuration of the water turbine unit 120 of the power generation unit 115 is different from that of the above-described embodiment, but the configuration of the generator unit 21 itself is the same as that of the above-described embodiment.

  The water turbine unit 120 includes the rotating shaft 120a described above and a water turbine blade 120d fixed coaxially to the rotating shaft 120a. The rotating shaft 120 a of the water turbine unit 120 passes through the bottom wall of the water conduit 112 and is coaxially connected to the rotating shaft 21 a of the generator unit 21. The entire turbine blade 120d is provided along the bottom surface of the water conduit 112, and as shown in FIG. 12, the water turbine blade 120d flows inside the water conduit 112 and is displaced by the projecting portion 119 projecting from the inner wall thereof. It is configured to be rotationally driven by the water flow 11a. This water flow 11 a is generated in the water conduit 112 by sucking water to the negative pressure generated by the operation of the pumping pump 14.

  As shown in FIG. 12, the water turbine blade 120d is provided with eight water turbine blades at an equal angular interval of 45 ° around the rotating shaft 120a. Each of the water turbine blades has a cross section having an appropriate radius of curvature. It is comprised from the flat lightweight metal material or resin material which has.

  All the embodiments described above are illustrative of the present invention and are not intended to be limiting, and the present invention can be implemented in other various modifications and changes. Therefore, the scope of the present invention is defined only by the claims and their equivalents.

  INDUSTRIAL APPLICABILITY The present invention can be used as a region-distributed power generation system in a smart grid for a power generation system that converts fluid flow into electrical energy that can be used for applications that require a small amount of power.

DESCRIPTION OF SYMBOLS 10 Reservoir 11 Water 11a Water flow 12, 82, 92, 102, 112 Water guide pipe 13 Condensate pipe 14 Pumping pump 14a Valve 15, 85, 95, 105, 115 Power generation unit 16 Power supply unit 17 Water supply pipe 18 Water drain valve 19 Discharge amount adjusting pump 20, 120-turbine unit 21 the generator unit 20a, 21a, 120a rotating shaft 20b housing 20c bearing member _20d, 20d ₁ ~20d _8, 120d water wheel blade 20e inside 21b rotating magnetic plate 21b ₁ ~21b _{3, 21c 1} ~21c ₃ permanent magnet 21c fixed magnet plate 21d, 21d _{1 to} 21d ₃ magnetic core 21e coil 82a, 102a vertical part 82b, 92b, 112b first horizontal part 82c, 112c first inclined part 82d, 92d, 112d second horizontal part 82e, 112e 2nd inclined part 82f, 92f, 112f Third horizontal portion 92a, 112a First vertical portion 92c, 112g Second vertical portion 92e Third vertical portion 92g Fourth vertical portion 92h, 112h Fourth horizontal portion 102b Inclined portion 102c Horizontal part 119 Protruding part

Claims (9)

A water storage tank for storing water, a water conduit arranged below the water storage tank, one end communicating with the water storage tank and descending toward the other end, and one end communicating with the other end of the water conduit A condensate pipe that rises toward the other end, a plurality of power generation units that are provided in the middle of the water conduit, and that generate power using a water flow flowing through the water conduit, and the other end of the condensate pipe Is connected to the pump for discharging the water in the condensate pipe into the reservoir, and is connected to the plurality of power generation units, and is charged by the power from the plurality of power generation units and A power supply device for supplying electric power, and a suction force generated by the pump discharging water in the condensate pipe generates a uniform suction flow in the condensate pipe and the conduit pipe. So as to form the water flow through the water pipe A has been made micro hydroelectric system,
Each of the plurality of power generation units includes a water turbine unit having a water turbine blade configured to rotate by the water flow, and a generator unit that converts the rotational force of the water turbine blade into electricity,
The generator section includes a rotating magnet plate having a plurality of first polarity permanent magnets, and a plurality of first polarity permanents that are stationary against a part of the plurality of first polarity permanent magnets. A magnet, a plurality of coils with a magnetic core, one end of which is opposed to a part of the C permanent magnet of the rotating magnet plate, and a plurality of first coils that are stationary and opposed to the other end of the plurality of coils with a magnetic core. A micro-hydroelectric power generation system comprising a permanent magnet having two polarities and configured to reduce cogging torque by the plurality of stationary first-polar permanent magnets. A water storage tank for storing water, a water conduit arranged below the water storage tank, one end communicating with the water storage tank and descending toward the other end, and one end communicating with the other end of the water conduit A condensate pipe that rises toward the other end, a plurality of power generation units that are provided in the middle of the water conduit, and that generate power using a water flow flowing through the water conduit, and the other end of the condensate pipe Is connected to the pump for discharging the water in the condensate pipe into the reservoir, and is connected to the plurality of power generation units, and is charged by the power from the plurality of power generation units and A power supply device for supplying electric power, and a suction force generated by the pump discharging water in the condensate pipe generates a uniform suction flow in the condensate pipe and the conduit pipe. So as to form the water flow through the water pipe A micro hydroelectric power generation system, wherein the pump is configured to pump water in the condensate pipe by a difference in height between a water surface in the condensate pipe and a water surface in the water storage tank. And
Each of the plurality of power generation units includes a water turbine unit having a water turbine blade configured to rotate by the water flow, and a generator unit that converts the rotational force of the water turbine blade into electricity,
The generator section includes a rotating magnet plate having a plurality of first polarity permanent magnets, and a plurality of first polarity permanents that are stationary against a part of the plurality of first polarity permanent magnets. A magnet, a plurality of coils with a magnetic core, one end of which is opposed to a part of the C permanent magnet of the rotating magnet plate, and a plurality of first coils that are stationary and opposed to the other end of the plurality of coils with a magnetic core. A micro hydroelectric power generation system comprising a permanent magnet having two polarities and configured to reduce cogging torque by the plurality of stationary first polar permanent magnets. The micro hydroelectric power generation system according to claim 1 or 2, wherein the plurality of stationary first polarity permanent magnets and the plurality of stationary coils with magnetic cores are alternately arranged. . The number of permanent magnets arranged on the rotating magnet plate is equal to the sum of the number of stationary first polarity permanent magnets and the number of stationary cored coils. The micro hydroelectric power generation system according to any one of claims 1 to 3. The micro hydroelectric power generation system according to any one of claims 1 to 4, wherein the power supply device includes a storage battery capable of charging electric power generated by the plurality of power generation units. The power generation unit is a mechanism for converting the rotational force of a turbine blade rotating by a water flow in a water conduit into electric power, the water turbine blade is installed in a housing attached to a side wall of the water conduit, and a part of the turbine blade is 6. The structure according to claim 1, wherein the housing protrudes into the water conduit and is rotationally driven by the water flow in the water conduit, and the housing has a negative pressure due to the water flow in the water conduit. The described micro hydroelectric power generation system. The power generation unit is a mechanism for converting the rotational force of the turbine blades rotated by the water flow in the water conduit into electric power, provided with a projecting portion projecting inside the water conduit, and the water turbine blade is located downstream of the projecting portion. The micro hydropower according to any one of claims 1 to 6, characterized in that the turbine blades are arranged in a pipe and are rotationally driven by a water flow shifted by the projecting portion. Power generation system. 8. The micro hydroelectric power generation system according to claim 6, wherein the water turbine blade is composed of eight blades at an equal angular interval of 45 ° around the rotating shaft. 9. The micro hydraulic power generation system according to any one of claims 1 to 8, wherein the water guide pipe is a bent pipe formed by a combination of an inclined part, a vertical part, and a horizontal part.

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