WO2024090023A1 - Turbine à eau transporteuse du type récepteur rétractable destinée à la production d'énergie marémotrice - Google Patents

Turbine à eau transporteuse du type récepteur rétractable destinée à la production d'énergie marémotrice Download PDF

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Publication number
WO2024090023A1
WO2024090023A1 PCT/JP2023/031571 JP2023031571W WO2024090023A1 WO 2024090023 A1 WO2024090023 A1 WO 2024090023A1 JP 2023031571 W JP2023031571 W JP 2023031571W WO 2024090023 A1 WO2024090023 A1 WO 2024090023A1
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WO
WIPO (PCT)
Prior art keywords
conveyor
tidal current
tidal
power generation
intake
Prior art date
Application number
PCT/JP2023/031571
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English (en)
Japanese (ja)
Inventor
政寿 岡田
政和 岡田
久美 岡田
Original Assignee
政寿 岡田
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 政寿 岡田 filed Critical 政寿 岡田
Publication of WO2024090023A1 publication Critical patent/WO2024090023A1/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
    • F03B13/00—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates
    • F03B13/12—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy
    • F03B13/26—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using tide energy
    • 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
    • F03B9/00—Endless-chain machines or engines
    • 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
    • Y02E10/30—Energy from the sea, e.g. using wave energy or salinity gradient

Definitions

  • the present invention relates to a highly efficient conveyor-type water turbine device for small-scale tidal power generation.
  • tidal currents The characteristics of tidal currents are that changes in tidal motion are easy to predict, and that the direction of the current periodically changes by almost 180 degrees due to the ebb and flow of the tides.
  • the motion of water particles below the surface attenuates depending on the depth of the water, and at a depth of half the wavelength, the motion of water particles is about 4% of that at the surface, so it can be considered that there is no effect from waves, and since the wavelength of wind waves commonly seen on the sea is several tens of meters, stable power generation is possible even in coastal areas where the water depth is relatively shallow, with almost no effect from waves.
  • Propeller turbines are reaction type turbines that use the reaction force of the water flow received by the propeller to rotate the rotating shaft.
  • the propeller diameter needs to be increased so that more water flow can be received by the propeller.
  • the turbine structure and the pillars that secure the turbine need to be strong enough to withstand the strong water thrust, resulting in high costs.
  • a conveyor turbine has been devised as a type of turbine other than horizontal-axis propeller turbines for use in low-head waterways.
  • conveyor turbines that use the flowing water of low-head waterways are based on the premise that multiple receiving plates protruding from a conveyor installed above the water surface receive the kinetic energy of the flowing water in a certain direction, rotate a sprocket or pulley via a conveyor chain or endless belt connected to the receiving plates, and generate electricity using the rotational force. They are not designed to use the conveyor body submerged in water to reduce the effects of waves, or to generate electricity in response to forward and reverse tidal currents.
  • the present invention aims to provide a water turbine that can generate electricity efficiently and at low cost from low-velocity tidal currents.
  • the main feature of this invention is that it takes advantage of the large volume of water flow that is characteristic of tidal currents, takes in large volumes of tidal currents through a funnel-shaped intake and collects them at the conveyor receiving plate, maximizing the total pressure energy received by multiple conveyor receiving plates arranged in a vertical row, thereby increasing power generation efficiency.
  • the outer frame of the conveyor-type water turbine of the present invention is a straight tube shape, and by installing it horizontally to the direction of the tidal flow, it has the advantage of being able to generate electricity continuously and efficiently even when the direction of the tidal flow changes by almost 180 degrees between high tide and low tide.
  • funnel-shaped water intakes and suction pipes equipped with tilting shutters at both ends of the conveyor frame.
  • the upstream shutter closes due to the pressure energy of the tidal current, allowing the large volume of water taken in to be guided to the receiving plate on the inlet side of the forward-rotating conveyor. Even if the tidal current is slow, it will increase in speed as it passes through the intake, making it possible to generate electricity. This increases the number of suitable locations for power generation and extends the operating time of the generator, which is expected to increase the total amount of power generated.
  • the inner frame inside the outer frame supports the conveyor body and blocks the flow of tidal currents between the carrying conveyor and the return conveyor, creating an independent waterway. This allows the kinetic energy of the taken-in tidal current to be concentrated and guided to the receiving plate of the carrying conveyor, allowing it to be efficiently recovered as pressure energy.
  • the downstream shutter when water is passing through, the downstream shutter is open, and the unused kinetic energy of the tidal current released from the conveyor is discharged through an inverted funnel-shaped suction pipe, which allows the water to be recovered as a pressure difference, which has the advantage of increasing power generation efficiency.
  • the receiving plate by making the receiving plate reversible, the projected cross-sectional area of the receiving plate when it returns toward the intake port can be reduced, reducing the water resistance, thereby maximizing the pressure energy that the conveyor turbine recovers from the tidal current.
  • the pressure energy recovered from the tide by the conveyor turbine's receiving plate is transmitted to the generator as rotational energy via a chain and sprocket or belt and pulley.
  • FIG. 1 is a block diagram of an apparatus according to the present invention. This is a diagram showing the position of the receiving plate and shutter depending on the direction of the tidal current. This is a three-sided view of the water intake/suction pipe and the outer frame connected together.
  • Figure 1 is a diagram of the device according to the present invention, showing the relative positions of the conveyor outer frame top plate, conveyor section, conveyor inner frame section, conveyor outer frame section, water intake/suction pipe, and stand, as well as the main components.
  • Figure 2 shows the position of the receiving plate and shutter depending on the direction of the tidal current, and also shows that the direction of rotation of the conveyor shaft does not change even if the direction of the tidal current changes by approximately 180 degrees.
  • Figure 3 is a three-view drawing of the outer frame of the device of the present invention, showing the shape for taking in more of the tidal current and directing it to the conveyor receiving plate.
  • the cross-sectional area of the water intake, the projected cross-sectional area of the receiving plate when standing and lying down, and the shutter mounting angle, etc., are to be arbitrarily determined taking into consideration the constraints imposed by the location where the device of the present invention is installed and the energy loss due to friction between the tidal current and the frame.
  • the theoretical maximum output that can be obtained from the available kinetic energy of the taken tidal current is approximately 192 kW.
  • Tidal current velocity V 2m/sec.
  • Effective head H 0.204m (calculated backwards from the tidal current velocity)
  • Intake cross-sectional area S 48 m2 (length 6 m x width 8 m)
  • Cross-sectional area of receiving plate s 2 m2 (length 2 m x width 1 m)
  • Flow rate Q 96 m3 /sec (V x S)
  • Total power generation efficiency K 1 (assumed)
  • Theoretical maximum output approx.
  • Stable power generation is possible even from low-speed tidal currents, and since no special mechanisms need to be added to deal with the tidal current's flow direction periodically changing 180 degrees, low-cost, highly efficient small-scale tidal power generation can be realized.
  • the ground-side power receiving and transmitting related equipment can be consolidated and enlarged, further reducing the total power generation costs.

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

Abstract

L'invention concerne une turbine à eau présentant une structure simple qui peut effectuer une production d'énergie hautement efficace même à partir d'un écoulement de marée à faible vitesse. Un flux de marée basse vitesse est prélevé à partir d'une admission en forme d'entonnoir ayant un grand diamètre, et le flux de marée accéléré lors du passage à travers l'admission en forme d'entonnoir est collecté et guidé par un récepteur fixé à un transporteur. Ainsi, l'énergie cinétique d'un flux de marée est récupérée sous forme d'énergie de pression et transmise à un générateur en tant qu'énergie de rotation d'un arbre principal par l'intermédiaire d'une courroie et d'une poulie ou d'une chaîne et d'un pignon pour produire de façon simple et à faible coût de l'énergie.
PCT/JP2023/031571 2022-10-24 2023-08-30 Turbine à eau transporteuse du type récepteur rétractable destinée à la production d'énergie marémotrice WO2024090023A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2022-169866 2022-10-24
JP2022169866A JP7353573B1 (ja) 2022-10-24 2022-10-24 潮流発電用の可倒受板式コンベヤ水車

Publications (1)

Publication Number Publication Date
WO2024090023A1 true WO2024090023A1 (fr) 2024-05-02

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ID=88198166

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Application Number Title Priority Date Filing Date
PCT/JP2023/031571 WO2024090023A1 (fr) 2022-10-24 2023-08-30 Turbine à eau transporteuse du type récepteur rétractable destinée à la production d'énergie marémotrice

Country Status (2)

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JP (1) JP7353573B1 (fr)
WO (1) WO2024090023A1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3992125A (en) * 1974-07-10 1976-11-16 Schilling Rolf E Underwater power apparatus with furlable sails as working members
JPS5696167A (en) * 1979-12-28 1981-08-04 Teruo Honami Water-flow electric power generating mechanism
JP2000087840A (ja) * 1998-09-14 2000-03-28 Sadaji Kiyohara 水中発電装置
JP2004270674A (ja) * 2003-01-16 2004-09-30 Jeitekkusu:Kk 流水エネルギー回収装置
JP2005240786A (ja) * 2004-02-27 2005-09-08 Mitsubishi Heavy Ind Ltd 潮流発電装置
JP2010031793A (ja) * 2008-07-30 2010-02-12 Michihiro Oe 潮流発電装置
US20120313376A1 (en) * 2011-06-09 2012-12-13 Browning Jr Wilson J Method and System for Converting Energy in Flowing Water to Electric Energy
KR20160011049A (ko) * 2014-07-21 2016-01-29 한국해양과학기술원 저수심 수력발전용 듀얼터빈 조립체

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5696167B2 (ja) 2013-01-17 2015-04-08 東芝テック株式会社 コントロール装置

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3992125A (en) * 1974-07-10 1976-11-16 Schilling Rolf E Underwater power apparatus with furlable sails as working members
JPS5696167A (en) * 1979-12-28 1981-08-04 Teruo Honami Water-flow electric power generating mechanism
JP2000087840A (ja) * 1998-09-14 2000-03-28 Sadaji Kiyohara 水中発電装置
JP2004270674A (ja) * 2003-01-16 2004-09-30 Jeitekkusu:Kk 流水エネルギー回収装置
JP2005240786A (ja) * 2004-02-27 2005-09-08 Mitsubishi Heavy Ind Ltd 潮流発電装置
JP2010031793A (ja) * 2008-07-30 2010-02-12 Michihiro Oe 潮流発電装置
US20120313376A1 (en) * 2011-06-09 2012-12-13 Browning Jr Wilson J Method and System for Converting Energy in Flowing Water to Electric Energy
KR20160011049A (ko) * 2014-07-21 2016-01-29 한국해양과학기술원 저수심 수력발전용 듀얼터빈 조립체

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JP2024062090A (ja) 2024-05-09
JP7353573B1 (ja) 2023-10-02

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