964 results about "Wind flow" patented technology

A turbine control system for a variable speed electrical generator in a wind turbine mounted atop a support tower. The wind turbine converts wind energy into a driving torque applied to the generator. The control system includes a turbine support tower position sensor and may also include other tower acceleration and velocity sensors. A wind flow estimator uses the measured motion, generator rotation rate and blade pitch angle to predict wind flow over the swept area of the turbine's rotor, and the tower motion. The predicted wind flow and motion is used in the turbine control system to properly adjust its operating point, to tune the controller, to control the rotor rotation rate, and to damp tower oscillations.

A vertical axis windmill is provided wherein the amount of wind directed to blades in the power producing part of rotation and the mechanical load of multiple generators is controlled by a feedback control to maintain a relatively constant rotational frequency of the shaft of the windmill. In a preferred embodiment, two wind foils extend radially outwardly from the blades to thereby provide a scoop capable of pulling in more air than would normally be received by the blades. The wind foils then direct the wind flow to the power producing part of rotation of the blades for maximum power output, when necessary. The wind foils can close to control the wind flow to the blades. The generating capacity of a plurality of generators is also controlled in response to shaft rotation to maintain substantially constant shaft rotation.

An advanced aerodynamic control system for a wind turbine including a drive shaft and blade. The control system includes an air control system coupled to a duct that extends from a first end toward a second end of the blade. A slot extends along a portion of a surface of the blade and is in communication with the duct. An instrument measures operating data of the wind turbine. A controller collects the operating data and compares the operating data to predetermined operating norms. The controller actuates the air control system to urge pressurized air into the duct and out of the slot at a specific air flow rate based upon the comparison between the operating data and predetermined operating norms. Control of the flow rate aids in capture of power from the wind flowing through a swept area of the wind turbine.

A Mixer/Ejector Wind Turbine (“MEWT”) system is disclosed which routinely exceeds the efficiencies of prior wind turbines. In the preferred embodiment, Applicants' MEWT incorporates advanced flow mixing technology, single and multi-stage ejector technology, aircraft and propulsion aerodynamics and noise abatement technologies in a unique manner to fluid-dynamically improve the operational effectiveness and efficiency of wind turbines, so that its operating efficiency routinely exceeds the Betz limit. Applicants' preferred MEWT embodiment comprises: an aerodynamically contoured turbine shroud with an inlet; a ring of stator vanes; a ring of rotating blades (i.e., an impeller) in line with the stator vanes; and a mixer/ejector pump to increase the flow volume through the turbine while rapidly mixing the low energy turbine exit flow with high energy bypass wind flow. The MEWT can produce three or more time the power of its un-shrouded counterparts for the same frontal area, and can increase the productivity of wind farms by a factor of two or more. The same MEWT is safer and quieter providing improved wind turbine options for populated areas.

A habitat friendly, pressure conversion, wind energy extraction system is disclosed for safely extracting usable energy from wind. The system includes one or more shrouds or concentrator wings that convert the dynamic pressure of wind into relatively lower static pressure and thereby induces a vacuum that draws wind into a turbine centralized within the shrouds or concentrator wings. As such, the turbine impellor blades may be significantly smaller than the large diameter rotor blades of current popular designs and may be enclosed within the shrouds or concentrator wings that present themselves as highly visible objects and as such are easily avoided by birds in flight. The novel system in particular includes a device and method of airflow regulation than minimizes or prevents the stalling, or the generation of a turbulent flow of wind over or between the shrouds or concentrator wings. This stalling has been shown to occur when airflow is quickly accelerated by force of vacuum and drawn out of the turbine shroud which then mixes with and disturbs the otherwise smooth flow of wind over or between the shrouds or concentrator wings. The system may also include an aerobrake that responds quickly to protect the impellor blades or associated mechanisms from overspeeding or exceeding other design limitations under gusting or violent wind conditions. The system may also include a method of guiding elements of the system to orient appropriately into prevailing winds, and a method to support elements of the system, without unduly impeding the free flow of wind. Other advantages and objects are as well disclosed that increase safety and efficiency, increase installation potential, reduce costs and expenses, and minimize negative environmental impact.

Disclosed is a vehicle using wind force. An object of the present invention is to provide a wind force power system driven by wind is provided within a hood panel of the vehicle, whereby the vehicle continuously charge a battery with electricity while being stopped or driving. The vehicle using wind force includes a wind force power system, the Power system comprising a ventilator that is rotated by the wind flowing along the roof panel in the rear of the vehicle, a shaft connected to the ventilator, a rotary gear connected to the shaft, a follower gear engaged with the rotary gear, and an electric generator for generating electricity as the follower gear rotates, wherein the electric generator of the wind force power system is electrically connected to the battery and the battery is electrically connected to the driving motor.

A rotor blade assembly and a method for reducing the noise of a rotor blade for a wind turbine are disclosed. The rotor blade has surfaces defining a pressure side, a suction side, a leading edge, and a trailing edge extending between a tip and a root. The rotor blade assembly further includes a noise reducer configured on a surface of the rotor blade, the noise reducer including a plurality of noise reduction features. Each of the plurality of noise reduction features includes a first surface and a second surface. The first surface includes a first portion mounted to one of the pressure side or the suction side and a second portion configured to interact with wind flowing past the other of the pressure side or the suction side. The second surface interrupts an aerodynamic contour of the one of the pressure side or the suction side.

A piezoelectric windmill configured to handle small scale wind flow. One embodiment the piezoelectric windmill solves problems associated with harvesting energy and generating electric energy or power using piezoelectric materials having significant advantages over previously available materials.

A stackable, vertical axis windmill comprised of a braced external frame that enables stacking of multiple windmill assemblies. Couplings are located on both ends of the vertical rotor shaft to enable stacking and the transmission of power, an internal wind flow cavity, and controlled wind guides is described. The external frame includes structural bracing that allows for two or more windmill to be stacked one upon another to optimize the use of land or rooftop space for the generation of electricity from wind power. The computer controlled wind guides automatically close partially in high wind conditions in order to prevent damage to the windmill. The internal wind flow cavity allows wind to transfer power to both the windward and leeward rotors blades. The rotor axis is constructed so that all bearings can be replaced without dismantling the structure.

Wind turbine with a blade rotor (11) which reduces noise by the inclusion of a set (21) of flexible bristles (23), aligned in at least one row, on the trailing edge (15) of the aerodynamic profile of the blades (11) and protruding over it, which allows the pressure fluctuations to be balanced on both sides of the profile of each blade (11) in the direction of the wind flow.

A blade of a wind turbine is presented. This blade is provided with a root section for connecting the blade to the shaft or hub of the turbine. The blade also contains a wind-energy-absorbing profile which is optimized for wind flow. The output of the wind turbine is increased by providing the root section with a member that is designed in such a way that the assembly consisting of the member and the root section can absorb wind energy and will increase the overall efficiency of the wind turbine.

The present invention provides a device for converting wind flow energy into mechanical energy, comprising a wind-engaging member having an aerodynamic profile which generates an uplift force in the direction of a load cable when the airflow direction is perpendicular to the load cable, a steering mechanism configured to produce a steered movement about a first axis or in a first direction of the wind-engaging member and about a second axis or in a second direction that is different from the first direction or axis of the wind-engaging member, relative to the airflow direction, and a control unit configured to use the steering mechanism to move the wind-engaging member along a predetermined flight path in a flight plane perpendicular to the load cable. The present invention further provides a method for converting wind flow energy into mechanical energy and a docking station for use with the device.

There are provided a TMD adjusted to damp vibration in a natural frequency of a wind turbine, an AVC adjusted to damp vibration in a variable frequency of turbulent wind flowing into the wind turbine and/or a frequency of a rotation speed of a wind-turbine blade, and a pitch-angle control portion provided with a correction portion which adjusts a damping frequency of the AVC. The AVC is configured to obtain the damping force by changing the pitch angle of the wind-turbine blade.

The invention relates to a settling, isolating and removing integrated dust prevention method of a fully mechanized excavation face, and is applicable to dust prevention and control of a coal mine underground fully mechanized excavation face. The method comprises the steps that: a foam generator is installed on a fully-mechanized roadheader, a pneumatic dedusting fan is arranged at one side of a laneway, and a wall attaching wind drum is installed at the front end of a pressed-in type wind drum; when the fully-mechanized roadheader works, the foam generator is operated to prepare foam, and the foam is sprayed by a spraying head to a dust source at the cutting part of the fully-mechanized roadheader so as to rapidly settle the dust; the axial air flow in the pressed-in type wind drum is changed by the wall attaching wind drum into a spiral type air flow and then sprayed, so as to prevent the air flow from directly blowing to the foam spraying region to influence the foam track; an air curtain dust isolating region is formed in front of the driver of the fully-mechanized roadheader, so as to effectively prevent dust from diffusing out; and the residual dust in the dust isolating region is removed by starting the pneumatic dedusting fan. According to the invention, foam dust settling, air curtain dust isolating and pneumatic fan dedusting are organically integrated, thus the dust prevention effect of the fully mechanized excavation face is significantly improved, the potential safety hazard brought by using of an electric dedusting fan is avoided, and the method has wide practicability.

The present invention is a vertical wind turbine having a turbine with a plurality of blades or wind vanes. The blades are constructed and attached to the shaft of the turbine so as to allow them to twist open to present more surface area to wind currents when a threshold rotational velocity is reached. Also presented are a novel outer shell that is placed over at least part of the shaft and a novel turbine blade.

An active clamping positive-negative excitation converter of zero voltage switch is prepared as using active clamping circuit as converter primary edge circuit, parallel-connecting switch tube to converter primary edge winding then to two ends of input voltage, parallel-connecting clamp tube to clamp capacity then to said winding, using full-bridge rectification circuit as converter secondary edge circuit, series-connecting resonant inductance in secondary edge circuit to let current of secondary edge winding flow through inductance for making current variation of secondary edge winding be current variation of inductance excitation.

A laminar flow, suction driven, wind energy conversion device is disclosed for extracting usable energy from wind. The device includes multiple vacuum generators that react with the wind flow to generate usable vacuum. The device avoids the use of potentially hazardous, high speed and exposed rotor or turbine blades of popular wind energy conversion devices and may therefore be safely located within human and animal habitats. The device incorporates many useful and novel features including a pneumatic transmission that the vacuum generators use to drive turbines to produce usable energy from wind energy, a framework that integrates components of the invention into a single structure, a method to cause the framework and components to self-orient into the oncoming wind, valves to manage the non-uniform distribution of vacuum pressures within the device that are caused by turbulent wind flow, and secondary airflow accelerators that serve to maintain an acceptably laminar flow of wind through the venturi-like openings within the device.