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1093results about "Water-power plants" patented technology

Electrical generator having an oscillator containing a freely moving internal element to improve generator effectiveness

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.

Method and apparatus for converting ocean wave energy into electricity

A power-generating device located in or on the surface of the ocean for generating power utilizing the energy in ocean wave motion. The device is moored to the bow and stern at ˜45° to incoming ocean waves, and with a yawing capability to adjust to change in wave direction. The device delivers power to a shore grid via a submarine cable from a generator. A rotational driving torque to the generator is produced by two long counter-rotating drive tubes, which are held by bearings in the bow hull and the stern hull of the device. As an alternative, hydraulics may be employed for energy capture and power smoothing and used to provide the rotational torque through a hydraulic motor to drive a generator. The main body is partially submerged and has multiple pod floats connected to the structure by rocker arms with bearings through which the drive tubes pass or double-acting hydraulic rams between the arms and the main body, which capture energy through pod displacement and store it in accumulators. Rotary torque of the drive tubes is produced when the pods move up and down according to motion of the waves and is transmitted to the generator to generate power. In the hydraulic case, energy is stored in accumulators as pressure due to the double-acting hydraulic pistons pumping when the pods move up and down according to the motion of the waves. Hydraulic pressure drives a pump, which provides torque to the generator.

Enhanced pumped storage power system

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.

Method for drawing joint scheduling graph of step reservoir

InactiveCN102080366ASolve the production methodComply with the scheduling operation modeWater-power plantsConventional hydroenergy generationHydropowerGraph drawing
The invention discloses a method for drawing a joint scheduling graph of a step reservoir. The method comprises the following steps of: drawing an initial scheduling graph of each reservoir according to designed guaranteed power output of each hydropower station progressively from upstream to downstream by an equi-output method and according to a single reservoir scheduling graph drawing method; drawing an initial scheduling graph for joint scheduling of a step leading reservoir; performing optimization calculation on the joint scheduling graph of the step reservoir; calculating the water power of each hydropower station from top to bottom in a water power sequence according to the initial scheduling graph by taking a long-series history runoff process as an input and taking a period of ten days as a calculation interval, and optimizing scheduling lines in the joint scheduling graph of the step reservoir; and outputting a last joint scheduling graph of the step reservoir and a scheduling rule. Indicated power output in a step joint scheduling graph is used for coordinating, so that complementary scheduling effect of the step reservoir is brought into full play, damage depth of the reservoir is reduced and the utilization ratio of water power is increased.

Method for rebuilding guide current hole to jet flow internal energy dissipating drilled shaft flood discharge hole

InactiveCN101280557AReduced risk of cavitation damageImprove securityBarrages/weirsWater-power plantsJet flowWater flow
The invention relates to a method that a diversion tunnel is rebuilt into a jet current internal energy dissipation tunnel, which belongs to the technical field of water conservancy and hydropower. The method is characterized in that: a drilled shaft is built at the downstream of the water inlet of the diversion tunnel; the lower part of the drilled shaft is connected with the top of the diversion tunnel, and the top is connected with a throat-type pressure tunnel; the outlet of the pressure tunnel in the drilled shaft is shrunk into a jet exit; a blanking adapter is arranged at the diversion tunnel of fore half section at the joint between the drilled shaft and the diversion tunnel so as to form a blind room. The method comprises the following reconstructed facilities: a short pressure water inlet, a derivation conduit section, a current adjusting section, a constriction section, a drilled shaft section, a drilled shaft tunnel connecting section and a diversion tunnel section. The method has the advantages that: the method is suitable for the reconstruction of high-head and mass flow flood discharge tunnel; a stable and effective flood discharge also can be kept in the situation of high water level at the downstream; the newly-built tunnel section occupies a small area with flexible arrangement; thereby the method can greatly reduce the cost of energy dissipating facilities.

Tidal generating equipment as well as generating method thereof

The invention relates to a tide generating facility and a generating method thereof, which include as follows: a culvert is arranged under a seaside dyke of a coastal impounding reservoir; a regulating gate and a water wheel are arranged in the culvert; the water wheel comprises a support saddle; a mainstay is arranged on the support saddle in radial direction; the mainstay is sleeved with vanes which are capable of swaying around the mainstay; a positioning device for restricting sway angles of the vanes is arranged at the support saddle; a vertical shaft is driven by a rotating shaft through a steering gear box; and a power conveying system is connected to the top of the vertical shaft, and the generator is driven by the power conveying system. Before a tide rises, the regulating gate is closed. During the process of tide rising, when the water level outside the pool rises to a certain position, the regulating gate is opened. The water outside flows into the pool and at the same time the water wheel is driven by the flowing water to rotate and generate electricity. Before a tide falls, the regulating gate is closed at first. When the external water level falls to a certain position, the regulating gate is opened and the water flows out and shocks the vanes of the water wheel. The vanes are changed to another angle and rotate in the same direction. The tide generating facility is efficient in operation.
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