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
  • F03B13/183—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 a turbine-like 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

• the present invention relates to wave energy propellers with moving blades designed for the purpose of obtaining renewable energy by utilization of the energy of waves in the oceans, seas or lakes.
• the wave energy is a major source of energy generated as a result of the movement of the waves on the sea surface or the pressure changes beneath the surface, wherein it is one of the most proposed renewable energy technologies. Because it is a clean, cheap as well as a renewable energy, numerous wave energy applications have been realized from the past to the present day.
• wave energy converters are usually categorized by location and type thereof. Some of the wave energy designs are set up along the shoreline, some of them, close to the shore, and some of them, in the offshore areas.
• the energy generation structures are found as being fixed to the shore or buried therein .
• Deep water connections or long underwater electrical cables are not needed.
• the generated wave energy can be much lower due to the wave regime of the shore and therefore these devices having less power generation ability. Examples of these applications can be given as oscillating water column, narrowing channel system and pendular.
• the devices used in the applications close to the shore are referred to as being shallow water based devices.
• the devices in said locations are generally positioned to a specific sea level by being fixed to the sea bottom.
• These devices face the drawbacks of the shallow waters being prone to the formation of low power waves.
• the noise pollution caused by Wells turbines in shoreline or near-shore applications is also one of the disadvantages.
• Osprey and WOSP type devices are used.
• the devices are positioned in deep waters.
• deep water waters having depth of tens of meters or more than 40 meters is understood.
• WEC deep water wave energy converter
• more energy will be generated as the waves of the deep waters will be larger.
• the construction and installation of the devices used in the offshore applications is more difficult due to the larger wave height and the energy of large waves in said locations, therefore additional costs are involved.
• the terminator type WEC Salter Duck, Floating Wave Power Vessel, Mighty Whale, Point observer WEC can be given as examples to this application: the terminator type WEC Salter Duck, Floating Wave Power Vessel, Mighty Whale, Point observer WEC.
• WEC wave energy converters
• the attenuator type wave energy converters mentioned above are floating structures positioned parallel to the direction of wave motion.
• the Pelamis and McCabe wave pumps are the most highly recommended types.
• the McCabe type wave pump comprises 3 rectangular steel (4 m wide) pontoons hinged to each other, arranged uniformly and moving by being connected to each other. Increasing the inertia of the central pontoon is achieved by adding an additional mass. Energy is generated from the motion in the hinge points by means of the hydraulic pump mounted between the central pontoon and the other pontoons.
• OPT wave energy converter is an example of the most preferred floating technologies in the WEC applications.
• the wave energy converter (WEC) developed by the Ocean Power Technologies (OPT) in the USA comprises a cylindrical structure having a diameter of 2-5 m, a closed upper part and a base opening to the sea. Hydraulic pump is disposed between the top part of the structure and the steel floater floating inside the structure. Electricity is generated by the relative movement of the floater with respect to the structure.
• Another example of floating technologies for the wave energy converters is the Archimedes Wave Swing, wherein said system comprises a cylindrical, air filled floater having a diameter of 10-20 m. The wave passing over the system raises or lowers the pressure inside the floater. Thus, the ascending and descending movement of the floater with respect to the ground results in the energy generation.
• oscillating water column is another structure implemented mostly below the water line.
• the bottom gate allows water to enter into the system.
• the air compressed by the water drives the turbine provided at the outlet by passing through the narrow part.
• the wave retreats it evacuates the air provided inside the system and said motion enables the turbine to move again.
• the energy generation will be provided by absorbing the circular motion of the wave as well as the random motion of the water thanks to the structure according to the present invention.
• Rotation of the propeller in only one direction is provided by opening and closing of the propeller blades with the motion of the sea water and power is obtained.
• Many of the problems experienced in the aforementioned wave energy converters will be eliminated thanks to the propeller structure according to the present invention.
• the object of the present invention is to form a wave energy converter that can operate in the seas/oceans with low as well as high wave height. Generation of the energy in an easier manner becomes possible since said wave energy converter rotates a shaft by directly providing circular motion.
• Figure 1 The schematic showing the wave motion, particle motions of the water and the wavelength on the surface of the ocean .
• Figure 2. Horizontal perspective view of the propeller.
• Figure 3. Front view of the propeller.
• Figure Transverse view showing the semi-open blades disposed between the two arms of the ⁇ propeller .
• FIG. 1 Top transverse view of a blade.
• Figure 6 Front view of the movement of a single blade structure provided on the shaft according to the counterclockwise motion of the water.
• Figure 7 Front view of the movement of a single blade structure provided on the shaft according to the clockwise motion of the water.
• Figure 8 View of the direction change, for the fluid motion, of the two blades provided on the arm in the counter-clockwise motion of the fluid.
• Figure 9 View of the direction change, for the fluid motion, of the two blades provided on the arm in the clockwise motion of the fluid.
• Figure 10 View of the direction, for the fluid motion, of the four blades provided on the 2 arms in the case of a very large counter-clockwise circular motion of the fluid.
• Figure 11 View of the direction change, for the fluid motion, of the four blades provided on the 2 arms in the case of a very large clockwise circular motion of the fluid.
• the present invention relates to a device in propeller structure disposed to be positioned horizontally on the sea by being fixed, although not required, to the near-shore locations, designed to carry out circular motion by rotating around its own axis according to the circular or elliptical motion of the water and intended to provide energy conversion by said motion thereof.
• the propeller (1) capable of performing fluid motion energy conversion, as shown in Figure 3, in terms of the structure thereof, comprises the following: a horizontal shaft (2) positioned so as to be parallel to the sea surface in the center thereof; a plurality of arms (3) provided on the shaft (2), fixed so as to be parallel to each other at certain points spaced equally along the shaft (2) and extending outwards; as shown in detail in Figure 4, the blades (5) in the form of sheets positioned preferably with equal spacing, through the thick edges of the blades (5) , between the arms (3) such that they are not in contact with each other and the other 3 sides thereof are disposed so as to move freely; blade shafts (6) extending by being passed through the inner part of thick edges of each blade structure and by being fixed from both sides to the arms (3); and support pieces (4) disposed in fixed positions so as to be parallel to the blade shafts (6).
• Flotation aids (7) disposed on both ends of the shaft (2) for being implemented during the utilization of the propeller according to the present invention in the offshore deep seas/oceans and serving as a pontoon for the purpose of enabling the positioning of the propeller (1) continuously above the sea at the desired level can be used.
• Said flotation aids (7) are preferably spherical, cylindrical, or in a different geometric structure suitable for flotation and provided with a hollow inner part or an inner part filled with materials such as foam (styrofoam) , etc., that can be floated in water.
• a single flotation aid (7) or a plurality of them extended by being added to each other can be provided.
• the flotation aids (7) mounted at the ends of the shaft on both sides of the propeller can be in a catamaran like elongated structure.
• the flotation aids (7) that can be applied to the propeller structure according to the present invention can rotate together with the shaft having cylindrical symmetry as well as they can be fixed while the shaft (2) rotates.
• the generators to be connected to the propeller can be disposed inside or on the flotation aids (7) .
• said propeller is positioned at the desired point with respect to the sea level by means of the sea bottom fixing pieces (rode, post, line, etc. ) .
• the blades (5) positioned between the arms (2) provided on the shaft (2) of the propeller according to the present invention can open and close by rotating back and forth with an angle of ⁇ 90° around the axis thereof with the motion of water.
• Support pieces (4) shown in Figure 4 are positioned so as to restrict said circular motion of the blades (5) in one direction.
• the blade structures are provided with a thin plate form (sheet form) and flow line geometry.
• the force F generated on the blades (5) provided in the propeller (1) structure according to the present invention resulting from the fluid motion is shown in detail as the minimum force (Fmin) in Figure 5 and the maximum force (Fmax) in Figure 7.
• the torque value can be considered as being T ⁇ 0.
• the shaft (2) axis of the propeller (1) according to the present invention is positioned on the sea so as to be just at the sea surface level.
• said position can be changed in the upward and downward direction with respect to the water line so as to obtain the ideal power point.
• the blade (5) turns to an orientation that is parallel to the direction of flow when the water strikes to the blade (5) in the opposite direction.
• the blade (5) moves, abuts the support piece (4) provided in the front part thereof and closes the flowing direction of the water so as to generate the maximum rotation force.
• the force generated on the blade (5) enables the whole propeller (1) to rotate around the shaft (2) axis.
• the arms (3) connected to the shaft (2) in the center of the propeller (1) according to the present invention, capable of performing fluid motion energy conversion and extending outwards from the center can be in a linear structure as ⁇ well as in a curved structure.
• the blades (5) provided on the propeller (1) prevent the water flow by closing and enable the propeller (1) to rotate around the shaft (2) axis by creating resistance.
• the blades (5) by opening, position themselves parallel to the water flow direction and prevent reverse power transfer to the propeller (1).
• different types of energy conversions (electrical energy, etc.) can be provided by applying force/torque to the propeller constantly in the same direction and transmitting the energy of the wave to the shaft (2).

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• 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)

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Citations (3)

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• 2013
  • 2013-05-30 WO PCT/TR2013/000177 patent/WO2013180680A2/fr not_active Ceased

Patent Citations (3)

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