WO2018158612A1 - Convertisseur d'énergie houlomotrice à aubes flottantes - Google Patents

Convertisseur d'énergie houlomotrice à aubes flottantes Download PDF

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Publication number
WO2018158612A1
WO2018158612A1 PCT/IB2017/051187 IB2017051187W WO2018158612A1 WO 2018158612 A1 WO2018158612 A1 WO 2018158612A1 IB 2017051187 W IB2017051187 W IB 2017051187W WO 2018158612 A1 WO2018158612 A1 WO 2018158612A1
Authority
WO
WIPO (PCT)
Prior art keywords
paddles
wave
motion
energy
wave energy
Prior art date
Application number
PCT/IB2017/051187
Other languages
English (en)
Inventor
Mostafa MOROVATI SHARIF ABADI
Seyed Rohallah EMADI
Seyyed Muhammad Esmaeel EMADI
Original Assignee
Morovati Sharif Abadi Mostafa
Emadi Seyed Rohallah
Emadi Seyyed Muhammad Esmaeel
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 Morovati Sharif Abadi Mostafa, Emadi Seyed Rohallah, Emadi Seyyed Muhammad Esmaeel filed Critical Morovati Sharif Abadi Mostafa
Priority to PCT/IB2017/051187 priority Critical patent/WO2018158612A1/fr
Publication of WO2018158612A1 publication Critical patent/WO2018158612A1/fr

Links

Classifications

    • 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
    • F03B13/14—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 wave energy
    • F03B13/16—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 wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem"
    • F03B13/18—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 wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem" where the other member, i.e. rem is fixed, at least at one point, with respect to the sea bed or shore
    • F03B13/1805—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 wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem" where the other member, i.e. rem is fixed, at least at one point, with respect to the sea bed or shore and the wom is hinged to the rem
    • F03B13/1825—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 wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem" where the other member, i.e. rem is fixed, at least at one point, with respect to the sea bed or shore and the wom is hinged to the rem for 360° rotation
    • F03B13/1835—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 wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem" where the other member, i.e. rem is fixed, at least at one point, with respect to the sea bed or shore and the wom is hinged to the rem for 360° rotation of an endless-belt type wom
    • 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

  • FIG. 1 Schematics of the Wave Energy Convertor 10
  • Figure 2 Enlarged View of Device - The angled shape of Bouy will guide more water to hit the
  • FIG. 1 Top view of the device 12
  • Figure 4 A simplified view of device to showcase the general working mechanism and movement of Paddles as a result of incident wave 13
  • Figure 5 Close-up view of the main parts of device, showing the arrangement of Paddles, Chain,
  • FIG. 6 Internals of the Guard Box showing shafts (slow/high speed) as well as Gearbox and
  • FIG. 7 Shelter for protecting the device from severe weather conditions (During normal operation conditions) 16
  • Figure 8 Side view of system with Shelter during normal conditions 17
  • the device is made of 1- collecting wave energy through the Paddles 2- converting the motion of wave captured by the Paddle into circular motion through the use of gears 3- generating electricity through generator. Overall schematics of the device is illustrated in Figure 1. Parts and accessories in this device is as follows:
  • Gearbox This device is used to increase the speed of rotation as received from the Shaft (6) and transmit the motion to the next step.
  • 8- High Speed Shaft By connecting to Gearbox (7), the high speed rotational motion is transferred to the Generator (9).
  • 9- Generator It is used to create electrical energy from the mechanical energy.
  • 10- Guard Box This is to protect the internal equipment such as: Slow Speed Shaft (6), Gearbox (7), High Speed Shaft (8), and Generator (9).
  • 11- Support Rods It is used for connecting the Guard Box (10) to the Bouy (12) and also to embed the electrical cable routing.
  • 12- Bouy In order to keep the system afloat and adjust the system according to low and high tides.
  • 13- Anchor Rods To support the Bouy (12), preventing side movements and a connection to the Anchor (16).
  • 14- Shelter In order to protect the system from environmental hazards such as typhoons.
  • 15- Shelter Door Installed as part of the Shelter (14) which is opened and closed as needed through hinges.
  • 16- Anchor Used for securing the Anchor Rods (13) to the seabed.
  • 18- Seabed. 19- Seashore.
  • 20- Limit Plate installed at the top end of Support Rods (11) in order to avoid the system to overpass the end of rods due to abrupt large waves.
  • FIG. 2 shows an enlarged view of the device without Water Level (17).
  • Figure 3 provides a top view of the device in which the situation of Paddles (1), Chains (2), Support Rods (11), Anchor Rods (13), Guard Box (10),relevant to wave direction is presented.
  • the incoming wave at the Water Level (17) hits the Paddle (1) positioned underneath the Guard Box (10), causing the Paddle (1) to move in the direction of the Wave. This movement continues until the kinetic energy of wave lasts.
  • the Paddle (1) shall withstand the high energy of waves and be able to utilize this force effectively, thus it shall be made from light and strong material as well as benefitting from proper concave shape to improve on its hydrodynamics, while Supporting Rod (4) will assist to secure them in its place.
  • Each end of Supporting Rod (4), in connection with Paddle (1) and Chains (2), is fastened in place using a Hinge (5), which will improve the flexibility of movements especially at the end of Guard Box (10).
  • the device is connected to two Bouys (12) by the Support Rods (11).
  • Each Bouy (12) is fixed into position through two Anchor Rods (13), allowing the Bouys (12) to move up or down only, which are secured to the Seabed (18) through the Anchor (16).
  • the device is floated on water in such a way that the main body of lower Paddle is immersed in water.
  • Length of the Anchor Rods (13) are selected in accordance with highest high tides as well as taking bad weather conditions into consideration.
  • a Limit Plate (20) is placed in order to avoid the system to overpass the end of rods due to abrupt large waves.
  • the device In lakes/seas where effect of tide is negligible, the device can be secured to seafloor with a simpler foundation design.
  • One of the challenges for wave energy convertors is severe weather conditions which can cause extensive damages to such devices, and the proposed device is no exception.
  • the device is equipped with Shelter (14) made from light weight and strong material as shown in Figure 7.
  • the Shelter Door (15) In normal conditions, the Shelter Door (15) is open to allow the wave inside, as shown in Figure 8.Therefore, only the lower Paddle (1) is immersed in water while the device is protected against rains and incoming wind hitting the upper Paddle(s) (1).
  • the Shelter Door (15) In case of severe weather conditions such as typhoons, the Shelter Door (15) is closed, preventing excessive forces to hit the Paddles (1) or pushing the upper and lower Paddles (1) at the same time as shown in Figure 9.
  • the device can be installed close to the shore where the produced electrical energy can be easily transferred which effectively reduces the costs. Furthermore, its close distance to shore means maintenance of the system is more convenient and less expensive.
  • the proposed device can benefit from the wave energy for a longer period as the Paddle travels with the wave for quite a long distance.
  • the proposed device will not cause harm to marine life and would not alter the ecosystem around it.
  • Ocean Power is considered as one of the cleanest sources, putting forward a great potential; thus, developed countries have established comprehensive programs to utilize this vast available source of energy within the seas and oceans.
  • Such energy can be extracted through the following four methods: 1. Ocean Current Energy: These are streams of water which have either lower or higher temperature than surrounding ocean temperature. These currents consistently complete a full cycle, moving in only one direction which also cause the warm weather to be transferred from one location on the earth to the other; Gulf Stream is one of the most important and famous examples. The most conventional method to utilize these currents is to use turbines which are positioned perpendicular to the stream and either anchored to the sea floor or hanged from floating support. 2.
  • Tidal Energy Tides are formed due to gravitational forces exerted by the Moon and the Sun and the rotation of the Earth. Gravitational pull from the Moon and the Sun causes rise in water level, and this rise will travel toward the West due to Earth's rotation. Therefore, waves with different periods are created. Amplitude range of such waves is varied and can reach a few meters. Extreme cases of high and low tides occur when the Sun and the Moon are aligned. Once tidal waves meet beaches and land masses, affected areas are amplified caused by the rushing water and the shape of beach lines. For example, domain of high and low tides in some regions of Canada can reach more than 15 meters. Through global and regional modeling, precise prediction for tides in any region is possible.
  • Tidal power is generally utilized by systems such as hydraulic dams. Once high tide occurs, seawater is stored in reservoirs built in shores, and once low tide occurs, the trapped water is passed through gates in the dam, propelling the turbines for necessary energy to produce electricity. If ideal site conditions and utilities are available, energy can be even extracted during high tides as well; generating power twice during each tide cycle. 3. Ocean Thermal Energy Conversion: These plants benefit from the temperature gradient which exists between deep-ocean cold waters and the shallow warm waters, creating a thermal cycle. By using substances such as Propane or Ammonia, a full thermal cycle for condensation and vaporization is achieved which can then be used by special mechanical devices to generate electricity. 4. Wave Energy: Waves are generated by the energy of wind passing over the seas.
  • the rate of transferred energy from wind to waters are proportional to wind speed and the distance that wind traveled over it. Waves can store great amount of potential energy due to mass of water that can be traveled along the surface of the sea and can transfer a great deal of kinetic energy due to speed of water. However, energy of wave cannot be extracted everywhere. The best areas to develop a plant, are places where waves gain high height. Energy output of the plants are not constant and depend of wave conditions.
  • the technology to produce energy from waves include extraction of mechanical energy from the wave and converting it to electrical energy.
  • preliminary converters can be divided into 5 categories: 1. Moving Object: In this method, an object is moved by the energy of wave and this motion is converted into electrical energy. 2. Oscillating Water Column: A column of water is travelled through a bottomless pipe or a floating box which creates a high speed wind that can propel a turbine. 3. Compressible Medium: The change in water pressure is used to compress the air inside a submersible device. The compressed air can be turned into a current of air which can be utilized to produce power. 4. Overflowing Wave Device: In this method wave height is increased through changing the seabed slope in order to pump more water to a raised platform. 5. Wave Concentrating Device: The mean seawater level is raised in specific locations through the use of cone shaped devices in order to trap high waves.
  • the device can be installed in different positions; anchored to seabed, floating, submersed in deep water or shallow areas of the shore. They can be installed as completely submersible devices and the structure can be extended to the surface. In practice, only navigation buoys produce their required energy through this method, while practical devices are only built near the shore. If such devices are installed offshore, the produced power can reach 3 to 8 times more than the ones installed near shore areas however, the construction and installation costs as well as the costs required for cabling to transfer the electrical energy, makes such projects impractical.

Landscapes

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

Abstract

L'invention concerne un convertisseur d'énergie houlomotrice qui est utilisé pour convertir l'énergie cinétique de la houle ou du débit d'une rivière/d'un canal en électricité. La vague est capturée par des aubes (1) qui sont traînées parallèlement à la vague sur une distance donnée. Le mouvement horizontal des aubes (1) est converti en mouvement de rotation par l'utilisation d'un mécanisme d'entraînement afin de générer de l'électricité en utilisant au moins un générateur (9). Au moins deux aubes (1) sont installées de manière à créer un mouvement quasi continu pour une production d'énergie constante. Le convertisseur est maintenu à flot et positionné parallèlement à la vague arrivante afin de maximiser l'utilisation de l'énergie disponible d'une vague. Le convertisseur peut être soit fixé à une certaine hauteur où l'effet des marées est négligeable, soit il peut être réglé en hauteur si nécessaire. Le convertisseur est ancré au fond marin (18) de telle sorte que le mouvement des vagues est utilisé avantageusement pour le déplacement des aubes (1).
PCT/IB2017/051187 2017-03-01 2017-03-01 Convertisseur d'énergie houlomotrice à aubes flottantes WO2018158612A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/IB2017/051187 WO2018158612A1 (fr) 2017-03-01 2017-03-01 Convertisseur d'énergie houlomotrice à aubes flottantes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IB2017/051187 WO2018158612A1 (fr) 2017-03-01 2017-03-01 Convertisseur d'énergie houlomotrice à aubes flottantes

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2474106B1 (fr) * 1980-01-21 1984-09-07 Garidel Denis
US20060162330A1 (en) * 2004-01-16 2006-07-27 Akio Takeuchi Power generation device utilizing river flow or seawater
CN2869362Y (zh) * 2005-12-09 2007-02-14 黄宇科 一种海浪水轮机
KR20110038882A (ko) * 2009-10-09 2011-04-15 주식회사 호국이엔지 발전장치
WO2012014189A1 (fr) * 2010-07-30 2012-02-02 Augustine Pascal Joseph Murphy Convertisseur d'énergie et procédé pour convertir l'énergie cinétique d'un flux d'eau courante en énergie de rotation, et générateur d'hydroélectricité
CN102465820A (zh) * 2010-11-16 2012-05-23 李云和 链桨轮机组合波力发电装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2474106B1 (fr) * 1980-01-21 1984-09-07 Garidel Denis
US20060162330A1 (en) * 2004-01-16 2006-07-27 Akio Takeuchi Power generation device utilizing river flow or seawater
CN2869362Y (zh) * 2005-12-09 2007-02-14 黄宇科 一种海浪水轮机
KR20110038882A (ko) * 2009-10-09 2011-04-15 주식회사 호국이엔지 발전장치
WO2012014189A1 (fr) * 2010-07-30 2012-02-02 Augustine Pascal Joseph Murphy Convertisseur d'énergie et procédé pour convertir l'énergie cinétique d'un flux d'eau courante en énergie de rotation, et générateur d'hydroélectricité
CN102465820A (zh) * 2010-11-16 2012-05-23 李云和 链桨轮机组合波力发电装置

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