Abstract: An OWEC designed to convert the energy of an oscillating water column within a wave into electricity for use during peak hours and into compressed air for use during off peak hours, and to withstand adverse weather conditions. Located off-shore, and submerged about 95%, the OWEC comprises: a vertically adjustable spar comprising a vertical shaft connected to a foundation in the sea floor, and extending above sea level; a float comprising parabolic reflectors on the underside to channel wave flow upward, and two buoyancy chambers to support the float's weight; adjustable parabolic spar reflectors attached near the spar's bottom to re-direct horizontal wave flow vertically to maximize the float's produced power; a cylinder system to generate compressed air that is stored in an onsite tank; and, a power takeoff (PTO) device sitting atop the float and comprising two counter-rotating flywheels to convert the float's power into electrical energy.

Abstract: In a wave powered electric generator system, multiple floatation devices are interconnected by torque arms arranged to convert pivotal movement of the torque arms due to up and down movement of the floatation devices, into one-way rotational movement of electric generator shafts, the torque arms being configured to permit expansion and contraction of their lengths when exposed to sudden, severe axial forces.

Abstract: The present invention relates to a damper for damping the reactionary motion of a wave energy conversion device to wave motion, comprising a damping energy absorber (7) having a reversible non-linear stress-strain response, arranged to damp the reactionary motion of the WEC. According to a first aspect, there is provided a damping structure (2) for a wave energy conversion device (1). The structure comprises a fixed member (6), and a damping member (7) having a reversible non-linear stress-strain response. The present invention also relates to a mooring component (2) for a mooring system (1) and to a method for manufacturing a mooring component (2). The component comprises a deformable element (6) having a reversible non-linear stress-strain response, wherein the response is a composite reversible non-linear stress-strain response.

Abstract: A method for generating energy from low-density fluids is provided. The method includes placing a first object in a first portion of fluid having a first density, injecting low-density fluids into the first portion of fluid in order to reduce the density thereof to a second density less than the density of the first object and thereby induce buoyancy-dependent translation of the first object in response thereto, and generating energy based upon buoyancy-dependent translation of the first object. Related apparatuses and systems are also disclosed.

Abstract: An apparatus for the conversion of the energy of sea or ocean swells. The apparatus comprises: a frame including a vertical post and horizontal beam; a first generator slidably connected to the vertical post; a second generator slidably connected to the horizontal beam; a first pinion connected to the first generator; a second pinion connected to the second generator; a float; a connection mechanism for connecting the float to the generators; a horizontal first rack connected to the float for engaging the first pinion; a vertical second rack connected to the one float for engaging the second pinion, wherein all components connected to the float are disposed at or above sea level.

Abstract: Tidal and wind turbines utilize a hydraulic drive-train to transfer the kinetic energy in moving currents to a generator located ground level for producing electricity for the grid. A rotor shaft transfers the mechanical energy from the rotors to a hydraulic pump which converts the mechanical energy into fluid energy which is transferred to a high pressure manifold and then to hydraulic motor for converting the fluid energy into rotational mechanical energy which spins a generator coupled to the motor. A high pressure manifold is coupled to a hydraulic accumulator for storing the fluid energy for later use.

Abstract: The invention relates to a wave-power unit with a floating body (1) connected by flexible connection means (3) to a translator (6) reciprocating in a linear generator (2), The floating body (1) is arranged for floating on the sea and the stator (8) of the generator for anchoring on the sea bed, According to the invention the connection means is guided by a guiding device (9) through lower and upper openings, The part of the connection means (3) that momentary is within the guiding device (9) is thereby guided to be aligned with the translator movements adjacent the lower opening and to be allowed to be inclined adjacent the upper opening. The invention also relates to a use of the invented wave-power plant and to a method for producing electric energy.

Abstract: Brine disposal systems are configured to receive brine from a brine source and to passively collect seawater from a nearby ocean during high tide using one or more tidal forces. Tidal movements during high tide, low tide, or both may be used to mix and thereby dilute the brine with the seawater. The mixture of seawater and brine is then passively discharged into the ocean during low tide using the tidal force, thereby minimizing the impacts on the marine ecosystem.

Abstract: An apparatus and method for converting wave energy using the relative rotational movement between two interconnected float assemblies and the relative rotational movement between each of the float assemblies and a spar which extends from a connection with the float assemblies at the water surface into the water.

Abstract: The object of the invention is a method for installing and servicing an apparatus module recovering the kinetic energy of water; and the apparatus module itself. The apparatus module with wave energy recovering units is descended into the sea bottom and is kept steady at the sea bottom by the help of its own mass and the mass of the water filled into a plurality of soft and hard compartments and valve compartments in the body of the apparatus module. Correspondingly the apparatus module is lifted into the surface of the water and made floating by the help of air that is blown to the plurality of soft and hard compartments and the valve compartments in order to replace the water.

Abstract: The present disclosure is directed to wave actuated devices for converting wave energy from waves passing through water into mechanical work, the wave actuated devices including primary buoys floating in the water and configured to rise and fall with the waves as they pass through the water between lower position and upper positions, carriages coupled to the primary buoy by a linkage and moving between first and second positions, carriage magnetically interactive materials mounted to the carriages, a support structure extending from a support surface and including a pivot spaced from the support surface, and an arm pivotally supported on the pivot and extending from the pivot to a first end proximate the carriage magnetically interactive material. Some examples of wave actuated devices implement buoy force to return the system to a state of potential energy as a wave triggers the device.

Abstract: An engine apparatus and method for operating same is disclosed. The engine generates electrical energy from phase changes of two different mixtures within chambers of the engine. Thermoelectric generators are preferably utilized to generate electrical energy from thermo differentials within the engine created by phase changes during engine operation. The engine may additionally be operated to perform mechanical based work.

Abstract: A system for mounting a set of wave energy converters in the ocean includes a pole attached to a floor of an ocean and a slider mounted on the pole in a manner that permits the slider to move vertically along the pole and rotate about the pole. The wave energy converters can then be mounted on the slider to allow adjustment of the depth and orientation of the wave energy converters.

Abstract: A wave energy conversion system uses a pair of wave energy converters (WECs) on respective active mountings on a floating platform, so that the separation of the WECs from each other or from a central WEC can be actively adjusted according to the wavelength of incident waves. The adjustable separation facilitates operation of the system to cancel reactive forces, which may be generated during wave energy conversion. Modules on which such pairs of WECs are mounted can be assembled with one or more central WECs to form large clusters in which reactive forces and torques can be made to cancel. WECs of different sizes can be employed to facilitate cancelation of reactive forces and torques.

Abstract: A sea electricity energy production device has a submerged water gate for controlling a flow of sea water into the device, one or more paddle wheels that receive water flow through the water gate to drive main gears in rotary motion, a series of pressure tanks having pistons driven by the main gears driven by the paddle wheels to pressurize water flow from the pressure tanks, and a Francis reaction turbine built on land that receives the pressurized water flow from the pressure tanks to drive the turbine and generate electricity.

Abstract: A tidal energy storage, power generation method is disclosed. During one tidal period, the method includes the following steps: during the early stage, forming a float into an enclosed hollow float; during the flood tide stage, converting the ascending potential energy of the float into the gravity potential energy of an energy storage assembly; during the slack water stage, charging the float with water; and during the tide ebbing stage, forming the float into an enclosed body filled with water, and converting the descending potential energy of the float into the gravity potential energy of the energy storage assembly. A tidal energy storage, power generation system is also disclosed. The system can improve the utilization rate of the tidal energy.

Abstract: A improved energy collection device is disclosed comprising a base a first shaft, rotatable about an axis, a second shaft fixedly mounted to the base, rotatably adapted around the first shaft defining spring housing. A spring is contained within the spring housing of the second shaft attached at a first end to the first shaft and at a second end to the second shaft. A winder is attached to the base, connected to the energy source which rotates the winder and is connected at a second point to the second shaft which is rotated by the winder tightening the second end of the spring to a designed point then unwinding the first end of the spring rotating the first shaft while continuing to wind the second spring end A generator is connected to the end of the first shaft generating electricity as the first shaft is rotated.

Abstract: The present invention is directed to a wave activated power generation system that converts the vertical movement of one or more power generation buoys resulting from interaction with waves into energy producing gyrations via a rack and pinion mechanism. The square-shaped power generation buoys are manufactured from fiber-reinforced plastic material.

Abstract: A water based renewable energy system is shown which uses tidal flow and an associated water wheel/weir assembly to provide pumping power for the system. A water wheel powered pump and associated piping are used to raise water from a lower lake reservoir to a higher storage lake reservoir. The water which is pumped to the higher storage lake can be released to a generator located at a lower elevation and then returned to the lower storage lake. The cycle can then be repeated by again pumping water from the lower lake to the upper lake. The pumped storage provides flow and head to generate electric power through the turbine generator.

Abstract: A buoy for generating electrical energy from an roll/pitch motion resulting from a passing wave. The buoy including: a body; a pendulum member rotatably disposed on the body at a first end of the pendulum member; a pendulum mass disposed at a second end of the pendulum member; an exciter mass positioned on the pendulum member between the first and second ends; and one or more generators for generating electrical energy, the one or more generators being positioned in the body such that swinging of the pendulum member due to the roll/pitch motion causes a portion of the exciter mass to engage the one or more generators to generate the electrical energy.

Abstract: An apparatus and method are disclosed for extracting energy from fluid motion. A deformable body adapted to be deformed by fluid motion is arranged to drive at least one energy medium to be delivered to an energy output. The energy medium is controllable in order to control at least one dynamic response of the deformable body.

Abstract: Various embodiments of linear electric generators and arrangements thereof are disclosed. One such generator includes a permanent magnetic array with magnets that are oriented such that like poles of the magnets are disposed adjacently to concentrate a magnetic field through a coil array. To enhance the magnetic field distribution, the magnets are affixed under a compressive strain due to repulsive forces resulting from proximity of the like poles. According to another aspect, a plurality of vibrational linear electric generators (VLEGs) can be arranged so that magnets of different VLEGs are oriented so that poles of opposite polarity are disposed adjacently to further enhance magnetic field concentration through coil arrays. In addition, a plurality of wave energy converters can be arranged in very close proximity, at most 8 times a height of a buoyant portion of the converters, to act as a seawall and thereby protect various structures from ocean waves.

Abstract: A power generation system 1 comprising a first water container, a hydropower system, a second water container and a pump system. The hydropower system 2,3,4 harness water energy coming from the first container and directed it to the second container. The water at the second container circulates to the first container by the pump system located at the second water container. The pump system is energized or powered by an external source and energy generated from the water displacement due to gravity at said pump.

Abstract: A combined offshore system for generating electricity includes of an offshore windmill unit with a generator for extracting power from wind and transferring it into electricity, a electricity export cable connected to the windmill for exporting produced electricity to offshore or onshore consumers, and at least one offshore wave power unit for extracting power from waves. This offshore wave power unit is characterized in that electricity produced by the wave power unit is transferred via the same electricity export cable as the electricity generated by the windmill unit.

Abstract: A device for converting wave energy into electricity, the device including: a float; a guiding-accelerating wheel, the guiding-accelerating wheel including a wheel body including a casing, a wheel center, and a chamber; an impeller; and an electric generator, the electric generator including a rotor. The float is upward and downward movable in accord with a movement of wave. The guiding-accelerating wheel is connected to a lower part of the float. The wheel center is disposed inside the casing. A plurality of deflectors is annularly arranged between the casing and the wheel body, and the deflectors are inclined to a same direction. Water channels are formed by the casing, the wheel center, and every two adjacent deflectors, each water channel including a water outlet. The impeller is clamped on the guiding-accelerating wheel at a position corresponding to the water outlet of the water channel.

Abstract: Apparatus and method is disclosed for generating usable power derived from oscillatory hydro-kinetic energy available in the movement of waves having a given height and being spaced apart by a predetermined distance at the surface of a body of water. Apparatus and method is disclosed for generating usable power derived from hydro-kinetic energy available in a body of water moving in at least one direction of movement, the at least one direction being substantially horizontal or substantially vertical. Apparatus and method is disclosed for generating usable power derived from hydro-gravitational forces available at a site having a source of water at a first elevation higher than a second elevation at a selected location where the usable power is to be derived.

Abstract: The present invention relates to a wave power generator, and more particularly, to a wave power generator that has comparatively high energy conversion efficiency, so that it can induce active investment and research and development to overcome uncertainties about the natural environment, and which can enhance practicability and value as a clean energy source, especially by virtue of the improved return on investment thereof.

Abstract: Using creativity, prior art (in general) and the prior art of generating electricity from water flow (in particular) this invention creates machinery to generate electricity from water waves.

Abstract: A system for generation of power using an apparatus in deep water is disclosed. The system includes a ballast buoy configured to achieve a desired depth in the deep water, a substantially vertical hollow tube attached to the ballast buoy that is submerged under water when the ballast buoy achieves the desired depth in the deep water, and a converter for converting the physical environment created in the substantially vertical hollow tube by placement of the ballast buoy at the desired depth in the deep water.

Abstract: A device for generating electricity includes a buoyant structure, a heave plate, at least one load carrying structure that is mechanically coupled to both the buoyant structure and the heave plate, and at least one magnetostrictive element. The magnetostrictive element is configured to to experienceforce changes applied by the load carrying structure caused by hydrodynamic forces acting on the device.

Abstract: An ocean wave energy converter uses one or more buoyant elongated float(s) self orienting toward oncoming wave fronts and movably affixed to a motion stabilized controlled buoyancy frame by down sloping tracks constraining the wave induced motion of the float(s) to an upward and rearward motion as oncoming wave crests impact and lift the barrier(s) and downward and forward as subsequent wave troughs return it. Motion between the barrier(s) and the frame is resisted and energy captured by a programmable electric or hydraulic power take off system. Capture efficiency is further enhanced by adjusting float mass and buoyancy by controlling water entering or exiting cavities in the float(s), use of wave shoaling and focusing means, and adjusting the submerged depth and slope angle of the device with adjustable frame air-water ballast tanks which also allow total float submergence during severe sea states.

Abstract: The invention relates to a device (1) for converting the energy of the swell and of waves into useable energy, particularly electrical energy, comprising a float element (2), an oscillating element (3) mounted such that it can move with respect to the float element, the oscillating element (3) being able to be set in relative motion with respect to the float element (2) under the action of the waves on the float element and means (4) for converting the movement of the oscillating element (3) into useable energy, particularly electrical energy, the device (1) also comprising braking means (5) capable selectively of immobilizing or releasing the oscillating element (3) with respect to the float element, clutch means (7) able selectively to couple or to uncouple the conversion means (4) and the oscillating element (3), and control means (8) for controlling the braking means (5) and the clutch means (7) as the swell evolves.

Abstract: A wave energy converter comprises a rotor, which is designed to convert a wave movement of a body of water, in which the wave energy converter is arranged, into a rotational movement of the rotor, wherein a mean density of at least one rotating component of the rotor can be adjusted and/or is lower than the mean density of the fluid surrounding the rotor in the body of water. The disclosure likewise relates to a corresponding control device and an operating method.

Abstract: An energy harvesting device (EHD) and method including a hollow outer envelope (201) having an inner wall (200) with a first predetermined magnetic field distributed on an inner surface of the inner wall, at least one inner core (202), free to move in the hollow envelope (200) characterized by a second predetermined magnetic field distributed on an inner surface of the at least inner core, the inner core being characterized by one or more convex projections of magnetically active material, at least one conducting loop (203) disposed at locations selected from the group consisting of the outer envelope and the at least inner core, so as to be suffused with magnetic flux due to the magnetic field distributions of the at least one inner core and the at least one outer envelope and generating an alternating current due to movement of the inner core within the outer envelope and a rectifying circuit in electrical connection with the at least one conducting loop (203) rectifying the alternating current into a curre

Abstract: A water wave power plant system includes a first guide rail, a first clockwise freewheel, a first counterclockwise freewheel, a first buoy queued through the through-hole by the first guide rail, first right and left roller, a first chain belt having engaging the first clockwise freewheel, the first counterclockwise freewheel, the first right roller, and the first left roller on the first plane, and corresponding second set of equivalent elements to tap the water wave energy in an opposite direction. Each of the guide rail includes a rectangular tube, first embedded-rollers installed in the rectangular tube rotatably with two partial portions exposed on two parallel outer wall of the rectangular tube, and second embedded-rollers installed in the first rectangular tube rotatably likewise, wherein the first embedded-rollers and the second embedded-rollers are disposed perpendicularly with respect to each other. A self-propelling ship is constructed using the water wave power plant systems.

Abstract: An energy harvesting device (EHD) and method including a hollow outer envelope (201) having an inner wall (200) with a first predetermined magnetic field distributed on an inner surface of the inner wall, at least one inner core (202), free to move in the hollow envelope (200) characterized by a second predetermined magnetic field distributed on an inner surface of the at least inner core, the inner core being characterized by one or more convex projections of magnetically active material, at least one conducting loop (203) disposed at locations selected from the group consisting of the outer envelope and the at least inner core, so as to be suffused with magnetic flux due to the magnetic field distributions of the at least one inner core and the at least one outer envelope and generating an alternating current due to movement of the inner core within the outer envelope and a rectifying circuit in electrical connection with the at least one conducting loop (203) rectifying the alternating current into a curre

Abstract: An apparatus and method for converting wave energy using the relative rotational movement between two interconnected float assemblies and the relative rotational movement between each of the float assemblies and a spar which extends from a connection with the float assemblies at the water surface into the water.

Abstract: The invention provides a tidal power generating device that has a large area to receive pressure of a tidal current and can be used in a water surface region. The tidal power generating device includes a cylindrical body that floats by itself and a blade that is continuously provided from a front portion to a rear portion on an outer periphery of the cylindrical body and has torsion in a single direction. The cylindrical body has an interior space through which a power generating nonrotary shaft, a connecting pipe, and a mooring nonrotary shaft pass. The power generating nonrotary shaft is provided with a fan-shaped weight and a power generator. The rear portion of the cylindrical body is sunk when the tidal power generating device is placed on water.

Abstract: Apparatus and method is disclosed for generating usable power derived from oscillatory hydro-kinetic energy available in the movement of waves having a given height and being spaced apart by a predetermined distance at the surface of a body of water. Apparatus and method is disclosed for generating usable power derived from hydro-kinetic energy available in a body of water moving in at least one direction of movement, the at least one direction being substantially horizontal or substantially vertical. Apparatus and method is disclosed for generating usable power derived from hydro-gravitational forces available at a site having a source of water at a first elevation higher than a second elevation at a selected location where the usable power is to be derived.

Abstract: An ocean wave energy converter utilizes a substantially submerged elongated absorption barrier oriented parallel to oncoming wave fronts having one or more substantially submerged air or gas filled variable volume vessels located between a relatively fixed position rigid rearward surface and a moving rigid wave front facing surface. Said vessel(s) are compressed by oncoming overhead wave crests both by increased hydrostatic pressure and wave kinetic impact, thereby capturing both wave potential energy (hydrostatic or heave) and kinetic (impact or surge) energy. Vessel compression is resisted by hydraulic, pneumatic, mechanical or linear electric generation means. Vessel re-expansion, when wave troughs are overhead, utilize hydraulic, pneumatic, electric, and/or mechanical (gravity mass or spring) means.

Abstract: In accordance with the present invention, a Hydrokinetic & Wind Energy Harvester, placed in a wave-swash zone or in a flowing stream captures energy through water turbines and a wind turbine. A funnel guides water to converge and impinge on water turbines housed in a pipe. A trash guard attached to the funnel prevents trash from entering the pipe. A rotational transmission-system with one-way clutches transmits torque to an alternator to generate electricity. Flywheels maintain steady rotation of alternator shaft. A buoyancy chamber at the bottom produces reduction of weight of the unit in water, thereby enhances maneuverability of unit in water. Stabilization tank at the top when filled with water provides extra weight and stability against sliding and overturning of the unit in its operating location. An energy farm combines the energy of several units linked together; in coastal water, units form a seawall-like barrier mitigating coastal erosion.

Abstract: A method for generating electrical power for a port. The method includes providing a power generator, where the power generator is secured to a structure within a port and converts energy within a body of water to electrical power. The method also includes providing a power storage, where the power storage is configured to receive the electrical power from the power generator and store the electrical power for future use. The method further includes a power transfer, where the power transfer is configured to direct the electrical power from the power storage to the location of use within the port.

Abstract: The invention concerns an apparatus for generating power, in particular electric energy, from wave motion in water basins. It comprises at least an operating unit, including gearing provided for unidirectional rotation and to continuously operate at least one power generator in response to the movements of a control element susceptible to alternating linear movements deriving from the wave motion. Each operating unit comprises at least a main or driving shaft (11, 12; 11b) solidly carrying a driving wheel (13, 14; 13b) engaged and placed in rotation by said linear control element (15, 15b) and at least two driven shafts (21, 22; 21b, 22b) operated by the main shaft through a unidirectional drive mechanism (20, 20b) and each connectable to at least a power generator.

Abstract: A device to capture and store or generate energy from variations in water level of a water body has a housing and an input shaft rotatably mounted to the housing. A drive belt is rotatably connected to the input shaft and a float is attached to that drive belt so that the float reciprocally drives the input shaft as the water levels increase and decrease. An output shaft is also rotatably mounted to the housing while a first one-way clutch is operatively disposed between the input shaft and the output shaft so that the input shaft rotatably drives the output shaft through the clutch in one rotational direction. A reversing gear is rotatably mounted to the housing and rotatably drives a second one-way clutch also operatively coupled to the second shaft to drive the second shaft in the same rotational direction as the first clutch, but during the opposite rotation of the input shaft.

Abstract: An energy converter device includes a reactive hydraulic power transformer (16) for converting periodic and variable hydraulic energy into coherent hydraulic energy. The device may also form a sub-system in energy converter systems for converting kinetic energy, for example from a wave (12), into electricity. The system has a power takeoff (14) including an energy capture device (22) for capturing energy from the wave (12), or other power source, and the power takeoff transfers this captured energy to the transformer (16). An accumulator (18) may be provided for storing and selectively discharging the captured energy to a generator (20) to produce electricity. At least part of the captured energy may be fed back through the transformer (16) to facilitate control over the phase and/or position of the energy capture device (22) relative to the wave (12) or other energy source.

Abstract: A wave energy converter (WEC) system includes first and second bodies which can move relative to each other in response to waves and a power-take-off (PTO) device coupled between the two bodies to convert their relative motion into energy. A sensor is used to sense selected characteristics of an incoming wave and produce signals which are applied to a control computer for predicting the impact of the incoming waves on the WEC. Simultaneously, signals indicative of the actual conditions (e.g. the velocity) of the WEC are also supplied to the control computer which is programmed to process the predicted and actual information in order to generate appropriate signals (forces) to the components of the WEC such that the average wave power captured by the PTO is maximized.

Abstract: An ocean wave energy device uses large gas filled and surface vented or partially evacuated flexible containers each having rigid movable ends and rigid fixed depth ends connected by flexible bellows, suitably reinforced against external hydrostatic pressure, submerged to a depth below anticipated wave troughs. One or more said containers compress and expand as waves and troughs, respectively, pass overhead driving hydraulic or pneumatic, pumping means producing pressurized fluid flow for a common sea bed motor-generator or for other uses or on-board direct drive generators. Mechanical, hydraulic or pneumatic means re-expand said containers when a wave trough is overhead. Power output is augmented by mechanically connecting said rigid moving surfaces to surface floats, which may also provide said submerged container venting such that as waves lift and troughs lower said floats, said containers are further compressed and re-expanded, respectively.

Abstract: A wave power plant includes a buoy and a power train. In the power train a driveshaft is arranged, which is driven to rotate either when the buoy rises or sinks, but always in the same direction. The driveshaft is mechanically coupled to one of the rotating parts of an electric generator and drives it for generating electric current. Furthermore, an energy accumulation device is provided which is also coupled to the driveshaft to accumulate energy when the buoy is rising or sinking and the driveshaft is rotating for driving the generator during the other of the rising and sinking movements. The coupling between the energy accumulation device and the driveshaft can extend via the other rotatable part of the generator, the air gap between the parts of the generator and the first part of the generator. The coupling over the air gap gives a torque, which drives the second part to rotate in one direction and which also counteracts the rotation of the driveshaft.

Abstract: A wave energy converter apparatus comprising at least two members joined by a connector movable so as to allow displacement of the members relative to one another in response to waves in water where the apparatus is located. The apparatus also includes an energy converter for converting motion of the connector to electrical energy, and a device for storing and/or transporting elsewhere the energy produced. The members, when in use and located in a body of water, are non-floating and completely submerged, the apparatus, as a whole, being neutrally buoyant. A member is additionally provided for maintaining each of the submerged members substantially at rest relative to the surrounding water with which they are in contact, such that the submerged members move under wave-induced action substantially in the same manner as a water particle would move under wave-induced action if located in the same region as the respective submerged member.

Abstract: According to one aspect of the invention, a device for converting kinetic energy of water waves to electrical power includes a turbine structure having multiple blades evenly attached to a first shaft, a first pulley wheel attached to the first shaft, a second pulley wheel attached to a second shaft disposed in parallel with the first shaft, an electricity generator is attached to the second shaft, and a platform is configured to support the turbine structure, the platform having an upper deck and a lower deck coupled to each other via a hinge. The upper deck is tilted from the lower deck via the hinge such that the first shaft is positioned with an inclining angle with respect to the water surface. The inclining angle is configured such that a distance and time for each fin to travel under the water surface between the entry point and exiting point are maximized while being near to the water surface.