596 results about "Tidal power" patented technology

An apparatus is disclosed for a turbine for generating electrical power from water or air flow comprising at least one rotor disk having a plurality of hydrofoil blades, a guide vanes, a cylindrical housing, and a generator means. A rim generator comprising a magnet race rotor rim and fixed stator coils in the housing is used. The apparatus is fitted with a screen to stop the ingress of debris and marine life, and a skirt augmenter device to reduce the Betz effect. The apparatus is preferably for sub-sea deployment and driven by tidal currents, but may be powered by river current or wave driven air or by wind. The apparatus may be deployed on at least one telescoping pole, tethered to the sea-bed and kept buoyant by buoyant concrete in the housing, inserted in a dam, under a barge or in a tidal power array.

An apparatus is disclosed for a turbine for generating electrical power from water or air flow comprising at least one rotor disk having a plurality of hydrofoil blades, a guide vanes, a cylindrical housing, and a generator means. A rim generator comprising a magnet race rotor rim and fixed stator coils in the housing is used. The apparatus is fitted with a screen to stop the ingress of debris and marine life, and a skirt augmenter device to reduce the Betz effect. The apparatus is preferably for sub-sea deployment and driven by tidal currents, but may be powered by river current or wave driven air or by wind. The apparatus may be deployed on at least one telescoping pole, tethered to the sea-bed and kept buoyant by buoyant concrete in the housing, inserted in a dam, under a barge or in a tidal power array.

An energy module comprising an energy absorber; and a mooring system, comprising a wing-shaped polymer shell attached to the energy absorber, the wing-shaped polymer shell designed to utilize the force of a passing current to create a downward force and thereby reduce any upward motion in the energy module; and a mooring cable housed inside the wing-shaped polymer shell and anchored to maintain the energy module in a fore and aft and a side-to-side position to provide stability, and to negate a rotational force on the energy module.

A tidal-powered desalinization system is mounted on a barge that oscillates about fixed pier structures, generating a two-way pumping action. The two-way pumping action is changed to a single direction flow of seawater. The sea water is directed into an on-board desalinization system. Fresh water is produced and collected in reservoirs, without an intervening generation of electricity.

An energy module comprising an energy absorber; and a mooring system, comprising a wing-shaped polymer shell attached to the energy absorber, the wing-shaped polymer shell designed to utilize the force of a passing current to create a downward force and thereby reduce any upward motion in the energy module; and a mooring cable housed inside the wing-shaped polymer shell and anchored to maintain the energy module in a fore and aft and a side-to-side position to provide stability, and to negate a rotational force on the energy module.

The invention relates to a method and device for desalting sea water and generating electricity by utilizing tidal energy drive. The high sea water in the sea when in rising tide is utilized to impact a water turbine to rotate in the process of flowing into an impounding reservoir, or the high sea water in the impounding reservoir when in ebbing is utilized to impact the water turbine to rotate in the process of flowing into the sea; the water turbine drives a high-pressure pump to operate to generate high-pressure water which is desalted through a reverse osmosis membrane module; the high-pressure concentrated sea water discharged from the reverse osmosis membrane module impacts a turbo machine to rotate; the turbo machine drives a generator to rotate to generate electric energy, thus realizing the comprehensive utilization and conversion of the tide energy; the effluents in the process of energy utilization and conversion do not cause pollution, are clean and environmental-friendly;the system does not need additionally provided external power, and is low in operation cost; and the tide energy is a renewable energy source, and has the advantages of sustainable development, better social benefits and application value.

The invention discloses an ultrahigh pressure cross linked polyethylene insulated flexible direct-current optical fiber composite submarine cable and relates to a direct-current cable. The ultrahigh pressure cross linked polyethylene insulated flexible direct-current optical fiber composite submarine cable is particularly used in large-power remote submarine power transmission in a flexible direct-current power consumption system of the vacuum control switch (VCS) current-switching technology and grid-tied connection among new energy alternating current systems of aperiodic operating wind power generation, tidal power generation and the like. The ultrahigh pressure cross linked polyethylene insulated flexible direct-current optical fiber composite submarine cable comprises direct-current cables, an optical fiber unit, a grounding feeder, filling strips, a main armor layer and an outer protective layer, wherein the two direct-current cables are respectively arranged on the left side and the right side, the optical fiber unit is arranged above the middle of the two direct-current cables, the grounding feeder is arranged under the middle portion of the two direct-current cables, and the cable is formed in a flat-supporting non-stranding mode; cable forming gaps are filled through arc-shaped filling strips; the direct-current cables, the optical fiber unit and the grounding feeder form the cable and then are armored through the main armor layer, the outer protectively layer is arranged on the surface of the main armor layer, anti-corrosion insulating glue is coated on each layer of polypropylene rope, and high-strength self-adhesive tapes are twisted outside the anti-corrosion insulating glue.

A tidal power generation system incorporates a buoy tethered to a first cable with a power generation spool engaging the first cable for rotational motion upon extraction of the cable by the buoy during elevation increases of the water on which the buoy is riding. An electrical generator is connected to the power generation spool and a rewinder for the power generation spool reels in the cable during receding water elevation. A gear drive interconnects the power generation spool and electrical generator with a gear reduction in certain embodiments for increasing generator rotational speed. The rewinder uses a rewind spool connected to the power generation spool and engaging a second cable for counter-rotational motion. A mechanical energy storage device is connected to the second cable. A suspended weight provides energy storage in the first embodiment while a spring attached to a fixed anchor point provides energy storage in an alternative embodiment.

The Tidal Energy System is a structure capable of extracting energy from the potential and kinetic energies of the tides, as well as from ocean waves and offshore wind. Its components operate synergistically in multiple capacities to extract energy from these sources so that the Tidal Energy System operates as unit. The Tidal Energy System is structured so that it can be operated integrally with electrolyzer and fuel cell technology to produce on demand power thus eliminating the pulse character of conventional tidal power. The Tidal Energy System can also generate hydrogen as an end product.

The invention discloses a folding vertical shaft tidal power generation device, and belongs to the technical field of tidal power generation. In the folding vertical shaft tidal power generation device, blades are connected to a main shaft by connecting rods; a tidal current which acts on the blades can rotate the main shaft; and the main shaft drives a generator for generating power through a speed-increasing gearbox and a universal joint. The connecting rods, the blades and the main shaft of the power generation device respectively adopt a folding structure locked by a locking mechanism, two connecting rods and one blade form an impeller assembly, circumferentially and uniformly distributed impeller assemblies are fixedly connected with the main shaft through the larger ends of the connecting rods, and sliders at the smaller ends of the connecting rods are embedded in chutes of the blades; the speed-increasing gearbox is fixed on a top plate of a protective cover through a support, and the generator is fixed on the inner side of the top plate of the protective cover; and the protective cover also adopts a folding structure, and is fixed on a cement foundation through a base. The power generation device can reduce the volume of the whole device, facilitate the transport, avoid disassembly and assembly of various components, and reduce the seabed installation cost by over 50 percent than the original cost through effective folding.

Accordingly, the system for extracting power from tidal or other water action in a water region having a bottom surface, comprises: a base assembly positionable on the bottom surface of the water region; a buoyant blade assembly mounted on the base assembly, the blade assembly including at least one buoyant blade member, wherein the blade assembly or the blade member is capable of oscillating through an angle, wherein the buoyant blade member is mounted such that when the base assembly is positioned properly in the water region relative to the direction of the tide or other water action, torque is generated by the oscillating movement of the buoyant blade assembly or the buoyant blade member, and wherein the base assembly includes a power-extracting mechanism responsive to the torque generated by the tide or other action of water or the buoyant blade assembly; and a system for coupling the torque to the power-extracting mechanism.

An improved tidal and river energy converter having a semi-submerged device designed to harvest energy from the tidal and river sites. Each device is connected to other like devices to form an interconnected array of tidal and river energy devices that are anchored to the shore at right angles to the prevailing tidal and river current. Each device is composed of a supporting floatation hull attached to a submerged strut supporting an air compressor driven by a slow rotating propeller. The air compressor is connected through a streamlined mooring system to the other air compressors in the array and those in turn are connected to a high pressure line leading underwater to an onshore air turbine electric generator connected to the local power grid.

The invention discloses a multi-functional combined ocean power generating platform capable of being congregated and a congregating group. The congregating group comprises a plurality of polygonal power generating platform bodies, each of the power generating platform bodies comprises buoy platforms, vertical axial wind driven generators, solar power generating units, tidal power generating units, wave power generating units and an ocean aquaculture region, wherein a buoy platform is arranged at each of polygonal angle points; a vertical axial wind driven generator and a solar power generating unit are arranged at the top of each of the buoy platforms; a tidal power generating unit is arranged at the bottom of each of the buoy platforms; the wave power generating units are used for connecting the buoy platforms in a flexible manner; the ocean aquaculture region is formed by surrounding a fishing net hooked in the wave power generating units. According to the congregating group disclosed by the invention, various power generation such as wind power generation, solar power generation, tidal power generation and wave power generation, fishery aquaculture and sea water desalination are integrated, structure problems caused by large spans among buoys in rigid coupling can also be solved, mutual interference distances among the vertical axial wind driven generators are short, the gravity center of a generator group on the platform is lower, distances among the buoys are short, wave energy can be collected, and impact from waves to the buoys is retarded.

A tidal power apparatus comprises a moored pontoon (1) having a duct (2) therethrough opening at opposed ends of the pontoon. The duct has a vertical axis rotor (3) therein driving an electrical generator (6). A deflector vane (8) is located in the duct at each end thereof, each deflector vane being mounted to pivot about a vertical axis between an active position, in which the deflector vane deflects water flow to one side of the rotor axis to cause rotation of the rotor, and an inactive position substantially aligned with the water flow from the turbine.

The invention belongs to the technical field of the power quality control of wind power generation, in particular a double-fed aerogenerator excitation system based on the hybrid stored energy of a super capacitor and a storage battery. The system is characterized by comprising a rotor side converter 3, a net side converter 4, a chopper A5, a chopper B7, a super capacitor 6, a storage battery 8, a bilateral switch as well as a limiting resistor Rl and a direct current side capacitor C, wherein a hybrid stored energy device comprising the chopper A5, the chopper B7, the supper capacitor 6 and the storage battery 8 is connected to both ends of the direct current capacitor in parallel; the rotor side converter 3 is responsible for providing excitation power to an aerogenerator; the net side converter 4 is responsible for transmitting power exchanging with the output end of the rotor side of the aerogenerator, and exactly controlling the charge and discharge power of the storage battery and the super capacitor by controlling the chopper A5 and the chopper B7 so as to compensate external power fluctuation. The invention has the advantages that the aerogenerator generates stable electrical energy under the condition of the frequent fluctuation of the aerogenerator, the safe stability of large-scale synchronization running of a wind farm is improved, and the excitation system can also be widely used in ocean power generation such as wave-actuated power generation and tidal power generation.

The invention discloses an energy conversion controller which is internally provided with an input adjusting unit, an input voltage judging unit, an input soft switching network, a voltage increasing module, a voltage decreasing module, a DC outputting module, an AC outputting module, a charging and discharging controlling module, a battery managing unit, a storage battery and an SCM chip and is connected with an external wind power generator, an external solar battery panel and an external tidal-power generator. The energy conversion controller has advanced and practical design, low manufacturing cost and strong practical value and integrates the central management and control of multiple functions.

A tidal power generator has a floating vessel hull that is subject to rising and falling water levels so that the hull moves vertically up and down. Linear-to-rotary converters are coupled between the vessel hull and a fixed object. The converters allow the hull to move vertically while constraining the horizontal movement of the hull. The converters convert the vertical movement of the hull into rotary movement, which is then used to drive an electrical generator. A harborage is provided to protect the hull and the converters and to regulate the water level for the vessel hull as well as become a fixed object relative to the vessel from which a change in relative position causes power to be developed. If the hull is subject to tidal variations, vertical movement of the hull can be desynchronized from the tidal variations so as to store energy during slack tides.

Accordingly, the system for extracting power from tidal or other water action in a water region having a bottom surface, comprises: a base assembly positionable on the bottom surface of the water region; a buoyant blade assembly mounted on the base assembly, the blade assembly including at least one buoyant blade member, wherein the blade assembly or the blade member is capable of oscillating through an angle, wherein the buoyant blade member is mounted such that when the base assembly is positioned properly in the water region relative to the direction of the tide or other water action, torque is generated by the oscillating movement of the buoyant blade assembly or the buoyant blade member, and wherein the base assembly includes a power-extracting mechanism responsive to the torque generated by the tide or other action of water or the buoyant blade assembly; and a system for coupling the torque to the power-extracting mechanism.

The invention provides an oscillatory type tidal power generation device which comprises a base, a column, tidal energy-absorbing boards, a power generation oil cylinder, a hydraulic power accumulator, a generator and a power generation hydraulic motor, wherein the column is arranged on the base and at least one swing arm is arranged on the column; the power generation oil cylinder is connected between the swing arm and the column; the tidal energy-absorbing boards are respectively arranged at the two ends of the swing arm; the power generation oil cylinder is connected with the hydraulic power accumulator which is arranged on the column through an oil pipe; the hydraulic power accumulator is connected with the power generation hydraulic motor through an oil pipe; the power generation hydraulic motor, the hydraulic power accumulator and the generator are all arranged on the column; and the power generation hydraulic motor is connected with the generator. According to the invention, a tide-driven hydraulic device is used to drive mechanical energy into electric energy; high-pressure hydraulic oil produced by the oscillation of the tidal energy-absorbing boards can drive the generator to generate electricity by the rotating of the power generation hydraulic motor. The device has simple structure, high reliability, low failure rate and is easy to install and maintain. Not only is the device suitable for high current sea areas, but also suitable for slow flow areas with lower flow rate and shallow sea areas.

The invention relates to a fluidic impact generator, in particular to a generator rotor. The self-adapting flexible vane rotor of the invention comprises a central rotating shaft, a rotating wheel and fixed supports, wherein, the central rotating shaft and the rotating wheel are arranged in interference fit and are fixed and limited by the fixed supports, two supporting layers which are perpendicular to the central rotating shaft are at least arranged on the central rotating shaft, fixed links are arranged at intervals on the same circumference which is arranged between the two adjacent supporting layers and adopts the central rotating shaft as the center, and the adjacent fixed links are connected by flexible vanes; and corresponding to a plane formed by the two fixed links connected with the flexible vanes, the flexible vanes can be convexly and concavely deformed. The rotor can generate the torque larger than that of the rigid vanes and has higher energy utilization coefficient, thus the rotor has high energy conversion efficiency and can be widely utilized in the fluidic fields of wind energy, tidal power, etc.

The invention relates to a marine multi-energy integrated power-generation power-supply monitoring platform. A wind-solar hybrid power generation system is arranged on a support platform; a draught fan rotating shaft drives a rotor to rotate when rotating, current is generated under the action of the rotor and a stator, and through rectification of a wind power rectifier, the current and current generated by solar panels are together collected into a wind-solar hybrid controller; a wave power generation system is an oscillating float-type power generation system, a float is connected with an upper piston device through a transmission shaft, the piston device is connected with an upper electric generator, and the electric generator is connected with an electric energy processing system through an electric transmission device; a tidal power generation device is arranged below a floating body; a sensor distribution system is an assembly of all sensors arranged on the platform; an underwater sensor group is arranged on a chain arranged longitudinally, and different sensors are detachably arranged according to the different depths of sea water; the electric energy processing system is arranged in an interior cavity of the floating body, and conducts processing, storage and output on electric energy converted from wind energy, solar energy, wave energy and tidal energy.

An integrated power system combining tidal power generation and ocean current power generation comprises: constructing barrages across the sea to make up a lake; installing turbine structures of a tidal power plant and sluice structures of a tidal power dam for generating electricity by using the potential energy difference between seawaters caused by tides and ebbs; forming an ocean current power park in a lake side by installing a plurality of ocean current generators, for generating electricity by using the flow of the seawater discharged through turbine generators, in a rear lake side of the turbine structures of the tidal power plant; and forming an ocean current power park in a sea side by installing ocean current generators, for generating electricity by using the seawater with the fast speed discharged into the sea through sluice gates, in a rear sea side of the sluice structures of the tidal power dam.

Oceanic tidal energy sources hydroelectric generating system coupled to a primary tidal basin through a bi-directional tideway exciting a turbine as a diurnal cycle tide waxes and wanes. A secondary tidal basin includes a tideway and turbine with flow modulated by a regulator gate to proportionately blend reserve tidewater capacity of the secondary tidal basin as a delayed resource compensating a slacking of the primary tidal flow with a graduated secondary tidal basin influx or outflow providing an aggregate summation of tidal energy acting upon the turbines to continuously drive generators and deliver a constant flow of electric power throughout the diurnal tidal cycle. Shunting excess tidal energy around the turbines during periods of reduced electric power demand furthers a full capacity of tidal resources in subsequent phases of the diurnal tidal day when solar day related power demand may increase.

The invention relates to a bidirectional through-flow turbine for generating power by tide. The bidirectional through-flow turbine comprises a forward inflow runner, a vertical shaft, a supporting frame, a bidirectional power generation rotating wheel, a reverse inflow runner, a generator and a speed increaser. The bidirectional through-flow turbine is characterized by further comprising front equal-width movable guide vanes and rear equal-width movable guide vanes, the front equal-width movable guide vanes are arranged between the forward inflow runner and the bidirectional power generation rotating wheel, the rear equal-width movable guide vanes are arranged between the bidirectional power generation rotating wheel and a reverse inflow runner, the forward inflow runner has a forward elliptical section, the ratio of the short axis to the long axis of the forward inflow runner is a golden division ratio, the reverse inflow runner has a reverse elliptical section, and the ratio of the short axis to the long axis of the reverse inflow runner is a golden division ratio. By taking double measures of the elliptical runners and the front and rear symmetric equal-width movable guide vanes, the composite effect of the operation efficiency of the turbine is greatly improved, the overall power generation efficiency of a generator set is remarkably improved, and the bidirectional through-flow turbine is applicable to replacing various through-flow turbines of low-head tidal power stations.

There is provided with a complex ocean power system combining ocean current power generation for generating electricity by forming a plurality of ocean current generators in front and rear of sluice structures of tidal power dams and sluice power generation for generating electricity by forming a plurality of ocean current generators in sluice conduits of the sluice structures, comprising: constructing barrages, which cross over the sea, to make up a lake; installing sluice structures of tidal power dams between the barrages 10 to generate electricity by changing a potential energy difference between seawaters caused by tides and ebbs to kinetic energy; installing ocean current generators in front and rear of the sluice structures and in the sluice conduits of the sluice structures to generate electricity by rotating turbine blades using the flow of the incoming seawater from a sea side into a lake side during flood tide and the flow of the seawater discharged from the lake side into the sea side during ebb tide; and installing sluice gates in the sluice structures 102, 210 to close and open the sluice conduits during flood tide and ebb tide.

The invention discloses a shutter type hydraulic self-control gate. The shutter type hydraulic self-control gate comprises a gate frame, window lattices, small door leaves and small door spindles, wherein, a plurality of window lattices are arranged in the gate frame; the small door spindles are arranged at the top part of the window lattices; the small door leaves are suspended on the small door spindles; a large door spindle is arranged at the top part of the gate frame to form a top spindle shutter type hydraulic self-control gate; and a large door spindle is arranged at the bottom part of the gate frame to form a bottom spindle shutter type hydraulic self-control gate. The top spindle type and fixed type shutter type hydraulic self-control gate can efficiently utilize tidal power resources in riverine and coastal areas and effectively control reservoir deposits of tidal power station, and provides safe energy and water insurance for the development of riverine and coastal areas. The bottom shaft type shutter hydraulic self-control gate can be used as a navigation gate of a ship elevator, reduce the open and close resistance of a flap gate and the error of water level of navigation, shorten navigation time, and comprehensively improve the navigation efficiency of ship elevators. Compared with the traditional gate, the shutter type hydraulic self-control gate has good work state and the passing water current is uniform.

The invention relates to a tidal power generation device, which comprises a fixed base, a generator, an output shaft, a forward rotating shaft, a reverse rotating shaft, a gear set and impellers, wherein the fixed base is horizontally arranged at the seabed and is provided with a vertical guide rail; the gear set comprises a forward rotating gear, a reverse rotating gear, a power output gear, a driven gear and a reversing gear; a ratchet mechanism is arranged in both the driven gear and the reversing gear; the forward rotating shaft and the reverse rotating shaft are driven by a group of forward impellers and a group of reverse impellers respectively; unilateral stable power is provided for the generator by the power output gear through the output shaft by using the ratchet mechanisms; the generator is placed on the water surface; the safety of the generator can be effectively protected; and the impellers are kept under the environment of the minimum resistance to work in water and on the water surface through an integral suspending or floating mode of the impellers and the device and the structure and contour design of the impeller blades, so that tidal energy can be utilized to generate power by device with the maximum efficiency.

The invention discloses a permanent magnet semi-direct-drive type tidal power generation device. The permanent magnet semi-direct-drive type tidal power generation device comprises a blade system, a transmission system, a power generation system, an alternating current system, a control system and a support system. The permanent magnet semi-direct-drive type tidal power generation device disclosed by the invention has the beneficial effects that the device can utilize tidal current energy for power generation and is safe and environment-friendly; the semi-direct-drive combination of a simple transmission device and a permanent magnet motor is adopted so as to be suitable for low water speed and low rotational speed, high in energy transformation ratio and good in power generation benefit; the underwater structure of the system is simple, the service life is long, the maintenance is simple and convenient, and the maintenance cost is low; the semi-direct-drive structure avoids the use of the low-speed permanent magnet motor, the blade system eliminates a yawing and pitch control system, the process requirements are low, and the technical implementation is easier than the direct drive type; and the manufacturing cost is reduced.

The invention relates to a bilateral guide vane through-flow turbine with elliptical runners. The bilateral guide vane through-flow turbine comprises a forward inflow runner, a vertical shaft, a supporting frame, a forward movable guide vane, a bidirectional power generation rotating wheel, a reverse movable guide vane, a reverse inflow runner, a generator and a speed increaser. The bilateral guide vane through-flow turbine is characterized in that the forward inflow runner has a forward elliptical section, the ratio of the short axis to the long axis of the forward inflow runner is a golden division ratio, the ratio of the short axis to the long axis of an ellipse from a forward inflow section to an inflow section in front of a forward movable guide vane section is linearly and gradually increased, the reverse inflow runner has a reverse elliptical section, the ratio of the short axis to the long axis of the reverse inflow runner is a golden division ratio, and the ratio of the short axis to the long axis of an ellipse from a reverse inflow section to an inflow section in front of a reverse movable guide vane section is linearly and gradually increased. By the aid of the bilateral guide vane through-flow turbine, water flow can smoothly and symmetrically flow in the elliptical runners, the overall power generation efficiency of a generator set is further improved, and the bilateral guide vane through-flow turbine is applicable to various vertical shaft through-flow turbines of low-head tidal power stations.