2196results about "Water-power plants" patented technology

An apparatus and method for providing electrical energy to an electrical device by deriving the electrical energy from motion of the device. In one embodiment, the inventive apparatus includes a novel kinetic electrical power generator (KEPG) consisting of an inventive oscillating weight having an internal cavity with a freely movable acceleration element disposed therein, resulting in improved acceleration and oscillation capabilities and lower motion threshold for the weight, a system for converting the weight's oscillating motion into rotational motion, and an electromechanical transducer system for generating electrical energy from the rotational motion. The novel KEPG includes components for modifying the electrical energy for storing and / or feeding the modified electrical energy to the electrical device. Optional components may be included for using the modified electrical energy to recharge one or more rechargeable batteries used in an electric device. Alternate advantageous embodiments of the inventive apparatus include, but are not limited to: a KEPG with multiple inventive oscillating weights to increase velocity and frequency of desirable rotational motion, and a KEPG system utilizing multiple electrically coupled KEPG sub-systems.

In order to obtain an electric power generator equipment capable of efficiently generating electric power and capable of reducing cost, without a water bath and constructive maximum height, the electric power generator equipment comprises a floating member for floating on a water surface, a power generator installed on an upper surface of the floating member, a cage suspended from a lower end of the floating member and held to a water bottom, a pair of floating bodies positioned in the cage which is separated, a wire rope whose both ends are fixed to the cage, and an air filling-up apparatus for filling up air to each of the floating bodies. The wire rope is winded to a pulley installed an end portion of each floating body and is winded to a pulley installed on the power generator.

An improved method and means for transforming kinetic energy into mechanical energy to generate hydroelectric power. A submersible scoop-like composite structure (10) with a hollow, tapered, inner chamber to funnel moving water through a turbine (22). The structure (10) has a hydrodynamically clean outer hull with cambered surfaces to increase the velocity of moving water to enhance the turbine's (22) efficiency. The structure (10) has a large orifice with a protective grill (14). The body of the structure (10) contains a vertical stabilizer petition (13) to keep the structure (10) parallel with the direction of the moving water. The detachable turbine (22) is housed in a tube (11) attached aft of the structure (10). The detachable generator (25A, 25B, 25C) is housed in a protective housing (12A, 12B, 12C) and attached to the turbine housing (11). The turbine (22) is coupled to the generator (25A, 25B, 25C) by a turbine drive shaft (24) through a gear box (23) to a generator drive shaft (26A, 26B, 26C). The turbine drive shaft (24) is supported by a front vertical support (27) and a rear vertical support (28). The generator drive shaft (26A, 26B, 26C) is protected by a generator drive shaft housing (29A, 29B, 29C). The entire structure is attached to an anchor base (16A, 16B, 18A, 18B, 21) by legs (15A, 15B, 17A, 19A, 19B, 20) The anchor base is fixed to a submerged medium. The scoop-like composite structure is formed from rigid material and submerged, whereby it cannot be seen from the surface. The structure is cost effective, efficient, produces no known pollution, and is not susceptible to weather related damage.

The invention relates to a method for united operation design and optimized dispatching of a Yellow River upstream cascade hydroelectric station, which comprising the following steps of: measuring daily average reservoir level and downstream daily average tail-water level of each power station through a water level sensor; measuring discharged flow of each power station through an ultrasonic flowmeter; establishing a cascade reservoir united optimized dispatching model through a cascade hydroelectric station united optimized dispatching model module; computing and analyzing a cascade hydroelectric station united optimized dispatching path through a dispatching path computation and analysis module; carrying out unified operation design on a cascade hydroelectric station group system through a cascade hydroelectric station group system unified operation design module; and carrying out unified dispatching on the cascade hydroelectric station group system through a cascade hydroelectric station group system unified dispatching module. The invention is simple, clear and practical with high pertinence, can enable average annual energy output of a Yellow River upstream cascade power station group after the power stations in Laxiwa and Jishi valley are put into operation to be increased by about 470 million degrees, and the water supply guarantee rate of Lanzhou cross section to reach95 percent, and has remarkable technical economic benefit.

An enhanced pumped storage power system. More particularly, the invention is a regenerative power system that utilizes the gravitational forces of downward movement of large quantities of water to convert same to electrical energy. In the preferred mode of implementation, the system utilizes a man-made lake at a first level of elevation. Though higher altitudes can be effective, the lake need only be approximately twenty to thirty feet in elevation. The lake, which may exceed one hundred acres in size, may be elevated above and adjacent a natural body of water, such as seawater at a coastline. As such, sandy terrain associated with the region facilitates initial construction of the system. An underground generator is utilized for the power conversion and pumping of the water back to the upper reservoir during times of low energy demand, allowing for significant noise reduction. Importantly, the system of the present invention may be utilized to provide significant levels of power to serve relatively large geographic areas during times of peak energy demand, when other sources of power are more expensive and subject to power outages. Finally, it should be noted that the components of the system are aesthetically-pleasing in nature, allowing the system to be effectively utilized in a residential area.

Systems are provided for obtaining electrical energy from sea waves using deflectable material, especially EAP (electro-active polymers) type SSM (stretchable synthetic material) that generates electricity when an electrostatic charge is applied to the polymer and it is stretched. In one system (10), a buoyant element (12) has upper and lower parts (14, 22) connected by a quantity (36) of SSM, with the lower part anchored at a fixed height above the sea floor (24) and with the upper part movable vertically to stretch and relax the SSM as waves pass over. In another system (50) the buoy is rigid, but is anchored to the sea floor by at least one line (60) that includes, or is connected to at least a length (64) of SSM material. In still another system (160) a plurality of rigid buoys (162) that float on the sea surface, are connected in tandem by SMM (166, 172) that is stretched and relaxed as the buoys pivot relative to each other in following the waves. The buoys preferably lie with at least 80% of their volume below the average sea surface.

A coated surface for resisting or enhancing bioadhesion includes at least one patterned polymer including coating layer having a plurality of features attached to or projected into a base surface. The features each have at least one microscale (<1 mm) dimension and have at least one neighboring feature having a substantially different geometry. The patterned coating layer preferably provides an average roughness factor (R) of from 4 to 50. The coating layer resists or enhances bioadhesion as compared to the base surface.

The invention relates to a low-head shaft-extension tubular pump turbine and blades thereof, and belongs to the technical field of energy power. The low-head shaft-extension tubular pump turbine comprises a pump turbine body, a reversible motor, a flow channel and a flow guide mechanism, the flow channel comprises a water inlet section flow channel, a guide blade section flow channel, a runner chamber and an S-shaped exhaust water pipe flow channel which are sequentially communicated, a runner is in transmission connection with the reversible motor through a spindle, the flow guide mechanism is arranged on the other side of the runner, the runner comprises a runner boss and a runner cone, the blades are circumferentially and uniformly arranged on the runner boss, the middle of each blade is thick while two sides of each blade are thin, each blade is in the shape of a three-dimensional warped surface, and spatial characteristics of each blade are indicated by an upper section, a middle section and a lower section. The operation conditions of power generation by a turbine and water pumping by a pump can be simultaneously met and are opposite in water flow direction, namely, the same runner needs to simultaneously meet the double requirements of water pumping and power generation, the efficiency of the two operation conditions can be simultaneously considered, and the low-head shaft-extension tubular pump turbine is applicable to a low-head pumped storage power station.

Normally hydroelectric dam powerhouses use river flow once before discharging it as turbulent tailwater, ineffective to spin turbines. The present invention uses tapered channels to confine and constrict turbulent tailwater into laminar flow that drives turbines both submersible and floatable utilizing the same water three times concurrently to generate new electricity. Channels originate adjacent to draft tube outlets, constrict in the downstream direction to create narrow necks where turbine / generators benefit from debris free, increased velocity and laminar flows to generate electricity. Hydroelectricity uses zero fuel, creates zero waste and has zero carbon dioxide emissions. Structures are uncomplicated, construction is within project boundaries minimizing environmental impacts and speeding projects coming online. New facilities are protected by existing dam security. Hydroelectricity replaces less dependable renewable energy systems.

A wave energy converting apparatus 44 and its associated tension mooring system 50 is described. The wave energy converting apparatus 44 comprises an elongate support structure 45 designed to extend above a mean water level in the ocean. The support structure 45 has a submerged member 46 provided in connection therewith below the mean water level. A float member 48 of positive buoyancy is slidably mounted on the support structure 45 so as to be movable in a vertical direction. The apparatus 44 also comprises a linear electric generator 49 having a stator provided in connection with the support structure 45 and a translator integrated into the body of the float member 48. Differential motion of the float member 48 relative to the support structure 45 results in the generation of electrical power by the linear electric generator 49. The tension mooring system 50 comprises a cable 51 extending from a ballast means 52 to a counterbalancing means 53 adapted to be suspended from the submerged member 46 via a pulley mechanism 54. The tension mooring system 50 allows the apparatus 44 to be “tuned” to the prevailing ocean conditions.

A method and apparatus (10) for extracting energy from flowing fluids using a diffuser (11) which has side walls (14) formed from a series of aerofoil section members (15) with gaps (29) provided between the leading and trailing ends of the members (15) to allow introduction of fluid from outside of the diffuser (11) into the diffuser flow passage (16) such that increased energy can be extracted from the flowing fluid by a prime mover (20) located in the flow passage (16).

A high altitude pumped-storage system for selectively integrating, storing, and distributing water and energy to increase the regional productivity of existing and future water and energy resources throughout multiple river basins is disclosed. This system addresses in part the increased requirement of supplying energy demands from a renewable energy source, such as wind, solar, or water generated power. The system includes at least one primary reservoir connected to multiple secondary reservoirs by conduits. The system allows for selectively distributing water and energy between secondary reservoirs and at least one primary reservoir. The system may comprise one or more hydroelectric power generation facilities. A method for increasing the regional efficiency of existing and future systems for producing, storing, and delivering energy from sources such as hydroelectric, wind and solar power from the water collected by the system described herein is also disclosed.

An ocean wave energy conversion apparatus includes a float adapted to ride on the surface of the ocean in reciprocal vertical motion in response to ocean wave front action and a lever adapted to ride on the surface of the ocean. The lever has one end coupled to the float. A fulcrum pivotally supports the lever. A magnet is coupled to the other end of the lever. Parallel stator cores having electric coils wound thereon together with the magnet form a magnetic circuit. Springs are adjacent the magnet and interconnected to the lever and the magnet. A barrier is disposed between adjacent stator cores. The upward motion of the float caused by impact of waves will move the magnet downward by the lever and compresses the springs. Downward motion of the float will move the magnet upward by the lever and expand the springs. Repeated movement of the magnet will induce a voltage in the electric coils.

An improved wave energy converter for use in offshore and deep-sea locations. The wave energy converter is adapted for secure attachment to the bottom of a body of water (e.g., the ocean floor), preferably beyond the breaker zone. The wave energy converter is selectively adjustable in length. A hydraulic power generation system is used to convert the energy present in the waves into hydraulic power that can be use to generate electricity and for other purposes, such as desalinization. The system may include a hydraulic piston assembly, a floatation device that is connected to the piston assembly, high and low pressure hydraulic reservoirs, and a hydraulically driven power generator. The floatation device moves upward in response to rising waves, and downward under the force of gravity in response to falling waves. The system utilizes this downward gravitational force to discharge fluid from the piston assembly, which in turn, drives the power generator. A control system is used to detect water conditions and to selectively adjust the length of the support structure and the fluid flow characteristics to dynamically optimize power generation based on changing water conditions.

A system for generating electricity includes a pump operable to convert wave motion from a body of water into mechanical energy. The pump includes an input port through which an operating fluid can enter the pump and an output port through which the operating fluid can exit the pump. A first outlet line and a second outlet line are fluidly coupled to the output port of the pump. A first reservoir is fluidly connected to the first outlet line, and a second reservoir is fluidly connected to the second outlet line, both reservoirs being selectively capable of receiving operating fluid driven through the output port.

A self-supported power generation device is installed in a high building having multiple floors to realize self-supported power supply of low power and simplified arrangement. Water reservoir is arranged in a floor-spaced manner by tanks set in different floors. Each tank has a conic converged lower section forming a discharge opening coupled to a power generator unit that is driven by vanes to generate electrical power. Thus, by the water head supplied from each tank to drive the vanes for rotating the power generator unit, and with a vertical stacked manner of the multiple sets of power generator units and tanks, a multi-floor water-weight-driven power generation assembly is established. A water collection reservoir is provided at the bottommost location to collect the water for cyclic use. Thus, self-supported power generation for self-supported supply of power of a building is realized and environmental protection and healthy concerns are also satisfied.

The invention provides a concrete construction method for high-cold areas in low temperature seasons. In the construction method, a whole set of construction standards and specifications for the selection of raw materials, the mixture ratio design of concrete, concrete position, heat preservation during transportation, concrete mixture and pouring, temperature monitoring, concrete maintenance after pouring and other aspects is formulated, so the method solves problems caused by the conventional concrete construction of hydropower projects in high-cold areas and low temperature seasons.

The invention relates to a power station on a submerged floating platform consisting of a floating structure (1) submerged at a certain depth, where it is moored by means of guy lines (2) with respect to ballasts or mooring buoys (3) located in the aquatic bed, arranging on said floating structure (1) hydraulic pumping mechanisms (5) which are operated by the weight differential of the water column between the crests and the troughs of the waves when such waves pass over them, in combination with a pneumatic system acting as a spring in said mechanisms (5) for operating an electricity-generating turbine (8) through a hydraulic closed circuit.

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.