WO2018190136A1 - Dispositif de production énergie hydroélectrique - Google Patents

Dispositif de production énergie hydroélectrique Download PDF

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Publication number
WO2018190136A1
WO2018190136A1 PCT/JP2018/013149 JP2018013149W WO2018190136A1 WO 2018190136 A1 WO2018190136 A1 WO 2018190136A1 JP 2018013149 W JP2018013149 W JP 2018013149W WO 2018190136 A1 WO2018190136 A1 WO 2018190136A1
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WO
WIPO (PCT)
Prior art keywords
shaft
generator
hydroelectric
unit
axis
Prior art date
Application number
PCT/JP2018/013149
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English (en)
Japanese (ja)
Inventor
浩氣 向井
智哉 川合
知美 後藤
年宏 小野田
文彦 松浦
Original Assignee
Ntn株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ntn株式会社 filed Critical Ntn株式会社
Publication of WO2018190136A1 publication Critical patent/WO2018190136A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03B—MACHINES OR ENGINES FOR LIQUIDS
    • F03B11/00—Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator
    • F03B11/08—Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator for removing foreign matter, e.g. mud
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03B—MACHINES OR ENGINES FOR LIQUIDS
    • F03B17/00—Other machines or engines
    • F03B17/06—Other machines or engines using liquid flow with predominantly kinetic energy conversion, e.g. of swinging-flap type, "run-of-river", "ultra-low head"
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03B—MACHINES OR ENGINES FOR LIQUIDS
    • F03B3/00—Machines or engines of reaction type; Parts or details peculiar thereto
    • F03B3/04—Machines or engines of reaction type; Parts or details peculiar thereto with substantially axial flow throughout rotors, e.g. propeller turbines
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/20—Hydro energy

Definitions

  • the present invention relates to a hydroelectric power generation apparatus.
  • the water flowing in the flow path may contain foreign substances such as grass. Such foreign matter may get entangled with the blades and shafts of the turbine wheel. Such entanglement of the foreign matter on the blades and shafts of the water turbine leads to a decrease in the number of rotations of the water turbine, and consequently to a decrease in power generation efficiency of the hydroelectric generator.
  • JP 2008-144646 A 1 configurations described in JP 2013-170547 A (Patent Document 2) and JP 2013-22214 A (Patent Document 3) are known.
  • the hydroelectric generator described in Patent Document 1 has a power generating rotor blade.
  • the power generating rotor blade has a shaft portion and a blade portion.
  • the wing portion is provided in a spiral shape around the shaft portion, and has a diameter that increases from the upstream side toward the downstream side.
  • the hydraulic power generation device described in Patent Literature 1 suppresses the entanglement of the foreign matter on the wing portion and the shaft portion by discharging the foreign matter to the outer edge side of the wing portion.
  • the hydroelectric generator described in Patent Document 2 has an underwater device including an impeller and a drifting substance removing device.
  • the debris removal device has a debris trapping net at a position that projects outward from the underwater device.
  • the flotage trapping net is rotatable relative to the underwater device.
  • the hydroelectric generator described in Patent Literature 2 suppresses the entanglement of the foreign matter on the impeller by causing the drifting matter catching net to catch the foreign matter.
  • the hydroelectric generator described in Patent Document 3 is disposed along the flow of water, and is disposed on the upstream side of the runner, the rotating shaft rotating by the runner, the generator connected to the rotating shaft, and the runner. Have a net. The net rotates around an axis along the flow of water.
  • the hydroelectric generator described in Patent Document 3 causes a net to capture foreign matter and discharges the foreign matter to the outside by the rotation of the net.
  • the present invention has been made in view of the above-described problems of the prior art. More specifically, the present invention provides a hydroelectric generator that can effectively remove foreign matters entangled with a water turbine without increasing the size of the apparatus.
  • the hydroelectric power generation device includes a water turbine, a generator unit, and a drive unit.
  • the water wheel has a first shaft and a wing.
  • the wing is attached to the first shaft.
  • the wing is disposed in a flow path through which water flows, and rotates the first axis around the central axis of the first axis by water.
  • the generator unit has a generator.
  • the generator includes a second shaft, and generates power by rotation transmitted from the first shaft to the second shaft.
  • the drive unit rotates the first shaft relative to the generator within a plane including the extending direction of the first shaft.
  • FIG. 3 is a cross-sectional view taken along line III-III in FIG.
  • FIG. 4 is a sectional view taken along line IV-IV in FIG. 2.
  • FIG. 10 is a cross-sectional view taken along the line XX in FIG. 9.
  • first direction and the second direction being parallel means that the angle formed by the first direction and the second direction is 0 ° ⁇ 5 °
  • the right angle (orthogonal) between the direction and the second direction means that the angle formed by the first direction and the second direction is 90 ° ⁇ 5 °.
  • FIG. 1 is a top view of the hydroelectric generator according to the first embodiment.
  • FIG. 2 is a front view of the hydroelectric generator according to the first embodiment.
  • 3 is a cross-sectional view taken along line III-III in FIG. 4 is a cross-sectional view taken along line IV-IV in FIG.
  • the bearing housing 22, the generator 23, and the cover 24 are not shown in order to clarify the planar structure of the generator base 21.
  • the hydroelectric generator according to the first embodiment includes a water turbine 1, a generator unit 2, and a drive unit 3.
  • the water turbine 1 has a first shaft 11 and wings 12.
  • the wing 12 is attached to the first shaft 11.
  • the extending direction of the wing 12 is orthogonal to the extending direction of the first shaft 11.
  • the wing 12 is disposed in the flow path 4.
  • the blade 12 rotates the first shaft 11 around the central axis 11a by the pressure of water flowing in the flow path 4.
  • the flow path 4 has a bottom surface 41, a first side surface 42, a second side surface 43, and an upper surface 44.
  • the first side surface 42 and the second side surface 43 are opposed to each other.
  • Each of the first side surface 42 and the second side surface 43 is continuous with the bottom surface 41.
  • the upper surface 44 faces the bottom surface 41.
  • the channel 4 is open on the upper surface 44.
  • the direction of water flow is a direction perpendicular to the paper surface and from the front side to the back side of the paper surface.
  • the wing 12 is disposed in the flow path 4.
  • the generator unit 2 includes a generator base 21, a bearing housing 22, a generator 23, and a cover 24.
  • the generator stand 21 is disposed on the flow path 4. More specifically, the generator base 21 is disposed on the beam 5 spanned across the flow path 4 in the direction from the first side surface 42 to the second side surface 43.
  • the generator stand 21 has a first surface 21a and a second surface 21b.
  • the first surface 21 a is a surface on the side facing the upper surface 44 of the flow path 4.
  • the second surface 21b is the opposite surface of the first surface 21a.
  • the generator stand 21 is provided with a shaft hole 21c.
  • the shaft hole 21c penetrates the generator base 21 in the direction from the first surface 21a to the second surface 21b.
  • the generator base 21 is provided with a pin hole 21d, a pin hole 21e, a pin hole 21f, and a pin hole 21g.
  • the pin hole 21d, the pin hole 21e, the pin hole 21f, and the pin hole 21g penetrate the generator base 21 in the direction from the first surface 21a to the second surface 21b.
  • the pin hole 21d and the pin hole 21f are arranged at positions that are point-symmetric about the shaft hole 21c in plan view.
  • the pin hole 21e and the pin hole 21g are arranged at positions that are point-symmetric about the shaft hole 21c in plan view.
  • planar view means the case where it sees from the direction orthogonal to the 2nd surface 21b.
  • the direction from the shaft hole 21c toward the pin hole 21d and the direction from the shaft hole 21c toward the pin hole 21e are orthogonal to each other.
  • the direction from the shaft hole 21c toward the pin hole 21e and the direction from the shaft hole 21c toward the pin hole 21f are orthogonal to each other.
  • the direction from the shaft hole 21c toward the pin hole 21f and the direction from the shaft hole 21c toward the pin hole 21g are orthogonal to each other.
  • the direction from the shaft hole 21c toward the pin hole 21g and the direction from the shaft hole 21c toward the pin hole 21d are orthogonal to each other.
  • the bearing housing 22 is attached to the first surface 21 a of the generator base 21.
  • the bearing housing 22 is provided with a through hole 22a.
  • the bearing housing 22 is attached to the generator base 21 so that the center of the through hole 22a overlaps the center of the shaft hole 21c.
  • the portion of the through hole 22a located at the end of the first surface 21a side extends to the outside of the pin hole 21d, the pin hole 21e, the pin hole 21f, and the pin hole 21g. That is, the radius R of the through hole 22a located at the end on the first surface 21a side (generator base 21 side) is the center of the shaft hole 21c and the pin hole 21d (pin hole 21e, pin hole 21f or pin hole 21g). It is larger than the distance L from the center.
  • the generator 23 is mounted on the second surface 21b of the generator base 21.
  • the generator 23 has a generator body 23a and a second shaft 23b.
  • the second shaft 23b is passed through the shaft hole 21c and the through hole 22a.
  • the generator body 23a generates power by the rotation of the second shaft 23b.
  • the cover 24 is attached to the second surface 21 b of the generator base 21 so as to cover the generator 23.
  • the driving unit 3 includes a support 31, a stopper 32, and a gear box 33.
  • the support column 31 is a hollow cylindrical member. More specifically, the support column 31 has a cylindrical shape.
  • a second shaft 23 b is passed through the support column 31.
  • the extending direction of the support column 31 (the direction of the central axis 31c) is parallel to the extending direction of the second shaft 23b.
  • the column 31 has a first end 31a and a second end 31b.
  • the second end 31b is an end opposite to the first end 31a.
  • the support column 31 is attached to the generator unit 2 at the first end 31a so as to be rotatable relative to the generator unit 2 around the central axis 31c.
  • the support column 31 is preferably capable of rotating 360 ° relative to the generator unit 2 around the central axis 31c.
  • the support column 31 is attached so that the direction of the central axis 31c is parallel to the direction orthogonal to the first surface 21a.
  • the support post 31 has a flange 31d.
  • the flange 31 d is provided at the first end 31 a of the column 31.
  • the flange 31d extends so as to project in a direction orthogonal to the extending direction of the support column 31.
  • the support column 31 is attached to the generator unit 2 so that the flange 31d is positioned in the portion of the through hole 22a positioned at the end of the first surface 21a side (generator base 21 side).
  • the support column 31 is supported by the bearing 34 so as to be rotatable around the central axis 31c in the through hole 22a.
  • the pin 31e is provided in the flange 31d.
  • the flange 31d is arranged so that the position of the pin hole 31e coincides with the position of the pin hole 21d (the pin hole 21e, the pin hole 21f, and the pin hole 21g) by rotating the column 31 around the central axis 31c.
  • the stopper 32 is a pin-shaped member, for example. The stopper 32 is passed through the pin hole 21d, the pin hole 21e, the pin hole 21f or the pin hole 21g and the pin hole 31e. As a result, the rotation of the column 31 around the central axis 31c is stopped.
  • the support post 31 is fixed to the gear box 33 on the second end 31b side.
  • the column 31 being fixed to the gear box 33 means that the column 31 is attached to the gear box 33 so as not to rotate relative to the gear box 33 around the central axis 31c.
  • the gear box 33 has a first helical gear 33a and a second helical gear 33b.
  • the first shaft 11 is inserted into the gear box 33. Inside the gear box 33, the first shaft 11 is supported by, for example, a bearing 36 so as to be rotatable around the central axis 11a.
  • the first helical gear 33 a is attached to the first shaft 11.
  • the second shaft 23b is inserted into the gear box 33. Inside the gear box 33, the second shaft 23b is supported by, for example, a bearing 35 so as to be rotatable around the central axis.
  • the second shaft 23b is inserted into the gear box 33 so that the extending direction of the second shaft 23b and the extending direction of the first shaft 11 are orthogonal to each other. Since the extending direction of the second shaft 23 b is parallel to the direction of the central axis 31 c of the column 31, the extending direction of the first shaft 11 is orthogonal to the direction of the central axis 31 c of the column 31.
  • the second helical gear 33b is attached to the second shaft 23b.
  • the second helical gear 33b is arranged so as to mesh with the first helical gear 33a.
  • FIG. 5 is a plan view showing a first state of operation of the hydroelectric generator according to the first embodiment.
  • FIG. 6 is a plan view showing a second state of operation of the hydroelectric generator according to the first embodiment.
  • FIG. 7 is a plan view showing a third state of operation of the hydroelectric generator according to the first embodiment.
  • FIG. 8 is a plan view showing a fourth state of operation of the hydroelectric generator according to the first embodiment. 5, 6, 7, and 8, the bearing housing 22, the generator 23, and the cover 24 are not shown.
  • FIG.5, FIG.6, FIG.7 and FIG. 8 the direction of the water which flows through the flow path 4 is shown by the arrow.
  • the column 31 is rotated around the central axis 31c in the counterclockwise direction, and the stopper 32 is inserted into the pin hole 21e and the pin hole 31e, resulting in the state shown in FIG. 6 (second state). .
  • the first shaft 11 inserted into the gear box 33 is similarly changed as the support 31 rotates relative to the generator unit 2 around the central axis 31 c. Rotate. Since the extending direction of the first axis 11 is orthogonal to the central axis 31 c, the first axis 11 is a plane that includes the extending direction of the first axis 11 when shifting from the first state to the second state. Inside, it will rotate relative to the generator section 2.
  • the column 31 is rotated counterclockwise around the central axis 31c, and the stopper 32 is inserted into the pin hole 21f and the pin hole 31e, resulting in the state of FIG. 7 (third state).
  • the column 31 is rotated counterclockwise around the central axis 31c, and the stopper 32 is inserted into the pin hole 21g and the pin hole 31e, resulting in the state of FIG. 8 (fourth state). .
  • the first state is restored.
  • the hydroelectric generator according to the first embodiment normally performs a power generation operation in a state where the extending direction of the first shaft 11 is parallel to the direction of water flowing through the flow path 4. At this time, foreign matter contained in the water may adhere to the wing 12.
  • the first shaft 11 is rotated relative to the generator unit 2 in a plane including the extending direction of the first shaft 11. By doing so, the pressure of the water flowing in the flow path 4 acts in the direction of removing the foreign matter adhering to the blade 12.
  • the hydroelectric generator according to the first embodiment it is not necessary to move or rotate the generator unit 2 when removing foreign matter. Therefore, according to the hydraulic power generation device according to the first embodiment, it is possible to efficiently remove foreign substances adhering to the blades 12 without increasing the size of the device.
  • the drive unit 3 may rotate the first shaft 11 by 360 ° relative to the generator unit 2 within a plane including the extending direction of the first shaft 11.
  • the pressure of the water flowing through the flow path 4 acts on the blades 12 evenly when removing the foreign matter. Therefore, in this case, the foreign matter can be removed more efficiently.
  • the driving unit 3 determines the extending direction of the first shaft 11 at a position where the direction of the water flowing through the flow path 4 and the extending direction of the first shaft 11 are parallel.
  • the stopper 32 that stops the relative rotation of the first shaft 11 with respect to the generator unit 2 in the plane including the stopper 32 is used, the position of the blade 12 can be stably fixed without using other power. Power generation operation can be performed.
  • the drive unit 3 determines the extending direction of the first shaft 11 at a position where the direction of the water flowing through the flow path 4 and the extending direction of the first shaft 11 are perpendicular to each other.
  • the stopper 32 for stopping the relative rotation of the first shaft 11 with respect to the generator unit 2 in the plane including the stopper 32 is provided, the water flowing through the flow path 4 acting in the direction of removing foreign matter from the blade 12
  • the blade 12 can be fixed at a position where the pressure of the pressure becomes maximum. Therefore, in this case, the foreign matter adhering to the blade 12 can be more efficiently removed.
  • the drive unit 3 does not stop the rotation of the first shaft 11 around the central axis 11c, and the first shaft is within the plane including the extending direction of the first shaft 11.
  • the water pressure from the water flowing in the flow path 4 removes foreign matter from the blade 12 after the first shaft 11 has moved to a position where foreign matter is removed. It is easy to act in the direction to do. Therefore, in this case, the foreign matter adhering to the blade 12 can be more efficiently removed.
  • the rotation direction of the blade 12 when the drive unit 3 approaches the first shaft 11 closest to the bottom surface 41 of the flow path 4 follows the direction of water flow.
  • the water level of the water flowing through the flow path 4 is low, and a part of the blade 12 is exposed from the water surface. Even so, it is possible to efficiently remove foreign substances having a long overall length.
  • the rotation direction of the blade 12 when the drive unit 3 approaches the first shaft 11 closest to the bottom surface 41 of the flow path 4 is opposite to the direction of water flow.
  • the water pressure acting on the foreign matter can be increased.
  • the foreign matter is solid.
  • the removal can be performed efficiently.
  • FIG. 9 is a cross-sectional view of the hydroelectric generator according to the second embodiment.
  • 10 is a cross-sectional view taken along the line XX of FIG.
  • the hydroelectric generator according to the second embodiment includes a water turbine 1, a generator unit 2, and a drive unit 3.
  • the water turbine 1 has a first shaft 11 and a blade 12.
  • the generator unit 2 includes a generator stand 21, a bearing housing 22, a generator 23, and a cover 24.
  • the drive unit 3 includes a column 31, a stopper 32, and a gear box 33.
  • the configuration of the hydroelectric generator according to the second embodiment is common to the configuration of the hydroelectric generator according to the first embodiment.
  • the drive unit 3 includes a reverse rotation suppression unit 37.
  • the configuration of the hydroelectric generator according to the second embodiment is different from the configuration of the hydroelectric generator according to the first embodiment.
  • the reverse rotation suppression part 37 is attached on the outer peripheral surface of the support column 31 facing the through hole 22a.
  • the reverse rotation suppression unit 37 is, for example, a cam type one-way clutch.
  • the reverse rotation suppression unit 37 is not limited to this, and may be any unit that allows rotation around the central axis 31c of the support column 31 in one direction and suppresses it in the other direction.
  • a groove 37 a is provided on the inner peripheral surface of the reverse rotation inhibiting portion 37.
  • the groove 37a has a bottom surface 37b, a first side surface 37c, and a second side surface 37d that faces the first side surface 37c.
  • the bottom surface 37 b is a surface facing the center side of the reverse rotation suppression unit 37.
  • the first side surface 37c and the second side surface 37d are continuous with the bottom surface 37b.
  • the height of the first side surface 37c is smaller than the height of the second side surface 37d. That is, the bottom surface 37b is inclined so that the depth of the groove 37a becomes deeper from the first side surface 37c side toward the second side surface 37d side.
  • the reverse rotation suppression unit 37 has rollers 37e and springs 37f.
  • the roller 37e is disposed in the groove 37a so as to contact the bottom surface 37b and the outer peripheral surface of the column 31.
  • the spring 37f has one end connected to the second side surface 37d and the other end connected to the roller 37e.
  • the reverse rotation suppression unit 37 allows rotation around the central axis 31c of the support column 31 in one direction and suppresses it in the other direction. That is, the reverse rotation suppression unit 37 allows relative rotation of the first shaft 11 with respect to the generator unit 2 in a plane including the extending direction of the first shaft 11 in one direction and suppresses in the other direction. .
  • the reverse rotation suppression unit 37 allows the relative rotation of the first shaft 11 with respect to the generator unit 2 in a plane including the extending direction of the first shaft 11 in one direction, and in the other direction. Since it can suppress, the 1st axis
  • shaft 11 can be rotated stepwise against the flow of the water in the flow path 4. FIG. Therefore, in this case, the safety of the work of rotating the first shaft 11 can be improved.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
  • Hydraulic Turbines (AREA)

Abstract

Selon un mode de réalisation de la présente invention, un dispositif de production d'énergie hydroélectrique est pourvu d'une turbine à eau (1), d'une unité génératrice d'électricité (2) et d'une unité d'entraînement (3). La turbine à eau (1) comprend un premier arbre (11) et une aube (12). L'aube (12) est fixée au premier arbre (11). L'aube (12) est disposée dans un chemin d'écoulement le long duquel l'eau s'écoule, et à l'aide de l'eau, amène le premier arbre (11) à tourner autour d'un axe central (11a) du premier arbre (11). L'unité génératrice d'électricité (2) comprend un générateur d'électricité (23). Le générateur d'électricité (23) comprend un second arbre (23b) et produit de l'électricité à la suite de la rotation transmise du premier arbre (11) au second arbre (23b). L'unité d'entraînement (3) amène le premier arbre (11) à tourner par rapport au générateur d'électricité (23) dans un plan contenant la direction dans laquelle s'étend le premier arbre (11).
PCT/JP2018/013149 2017-04-14 2018-03-29 Dispositif de production énergie hydroélectrique WO2018190136A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2017080618A JP2018178877A (ja) 2017-04-14 2017-04-14 水力発電装置
JP2017-080618 2017-04-14

Publications (1)

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WO2018190136A1 true WO2018190136A1 (fr) 2018-10-18

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007170239A (ja) * 2005-12-21 2007-07-05 Shinko Electric Co Ltd 水力発電装置
US7525212B1 (en) * 2005-06-20 2009-04-28 Chris S Catlin Ocean power harvester
JP2013170547A (ja) * 2012-02-22 2013-09-02 Toshiba Corp 漂流物除去装置、水中装置
JP2013241841A (ja) * 2012-05-17 2013-12-05 Kosumosu Enterp:Kk 水力発電装置及びその設置方法
WO2014122731A1 (fr) * 2013-02-05 2014-08-14 株式会社音力発電 Système de génération d'énergie

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7525212B1 (en) * 2005-06-20 2009-04-28 Chris S Catlin Ocean power harvester
JP2007170239A (ja) * 2005-12-21 2007-07-05 Shinko Electric Co Ltd 水力発電装置
JP2013170547A (ja) * 2012-02-22 2013-09-02 Toshiba Corp 漂流物除去装置、水中装置
JP2013241841A (ja) * 2012-05-17 2013-12-05 Kosumosu Enterp:Kk 水力発電装置及びその設置方法
WO2014122731A1 (fr) * 2013-02-05 2014-08-14 株式会社音力発電 Système de génération d'énergie

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