摘要:
A wind turbine having one or more magnets for reducing friction between the turbine support and a turbine rotor. The reduction of friction between the turbine rotor and the turbine support allows for an increase in energy production and scale of the wind turbines. The magnet configuration employs a ring of cylindrically-shaped magnets at the bottom and opposed by a corresponding number of generally rectangular-shaped magnets. Bearing magnets are also employed for axial stabilization.
摘要:
One or more variable pitch airfoils in fluid communication with a rotor of a fluid turbine can control the amount of energy directed to the rotor, and further control the amount of energy generated by the turbine. Varying the pitch of the airfoils may provide a means of controlling the power output of a fluid turbine without the need to control the pitch of the rotor blades, and may further provide a means of mitigating the effects of wind shear on the rotor. Variable pitch airfoils may also include a means of controlling the active power, reactive power and SCADA, of a group of fluid turbines.
摘要:
The present disclosure relates to fluid turbines having a turbine shroud assembly formed with mixing elements (e.g., both inwardly and outwardly curving elements) having airfoil cross sections. These airfoils form ringed airfoil shapes that provide a means of controlling the flow of fluid over the rotor assembly or over portions of the rotor assembly. The fluid dynamic performance of the ringed airfoils directly affects the performance of the turbine rotor assembly. The mass and surface area of the shrouds result in load forces on support structures. By delaying or eliminating the separation of the boundary layer over the ringed airfoils, boundary layer energizing members (e.g., vortex generators, flow control ports) on the ringed airfoils increase the power output of the fluid turbine system and allow for relatively shorter chord-length airfoil cross sections and therefore reduced mass and surface area of the shroud assemblies.
摘要:
An apparatus (10) for generating electrical power from wind energy (20) comprising: means (22) for forming at least two discrete jets of air (24) from an oncoming wind (20); a conduit (16); and at least one wind electricity turbine (14) located within the conduit (16), wherein the jets (24) are arranged to enter the interior of the conduit (16) from different directions and to converge towards a point or points (20) located within the conduit (16). The apparatus (10) may additionally comprise an inlet aperture (22), the inlet aperture being adapted to face towards, and to collect a stream of air from, an oncoming wind (20); and a manifold communicating with the inlet aperture (22) and being adapted to split the stream of air into a plurality of discrete jets (24), the manifold comprising a manifold outlet (28) for each jet (24); each manifold outlet (28) communicating with the interior of the conduit (16) and being arranged to cause their respective jets (24) of air to converge towards a point or points (30) located within the conduit (16). A method of generating electricity using the apparatus is also described.
摘要:
The windmill assembly is a low drag, streamlined body of revolution that captures the kinetic energy content of the accelerated laminar air surrounding the body. The assembly includes a power-generating, wind-driven turbine that is compact, lightweight and capable of producing a substantially greater output than a conventional windmill with a comparable size rotor. The turbine includes a protruding aerodynamic nose and outer cowling that provide a streamlined, wind-collecting inlet section that constricts the incoming air stream and increases its velocity through the turbine blades. The turbine further includes an exit section designed to exhaust the air stream with a minimum of turbulence. One or more generators are coupled to a turbine wheel, and are electrically switched on and off to maximize the energy capture over the full range of ambient winds. The wind turbine assembly may be configured around a blimp-type body having counter-rotating turbine assemblies.
摘要:
The windmill assembly is a low drag, streamlined body of revolution that captures the kinetic energy content of the accelerated laminar air surrounding the body. The assembly includes a power-generating, wind-driven turbine that is compact, lightweight and capable of producing a substantially greater output than a conventional windmill with a comparable size rotor. The turbine includes a protruding aerodynamic nose and outer cowling that provide a streamlined, wind-collecting inlet section that constricts the incoming air stream and increases its velocity through the turbine blades. The turbine further includes an exit section designed to exhaust the air stream with a minimum of turbulence. One or more generators are coupled to a turbine wheel, and are electrically switched on and off to maximize the energy capture over the full range of ambient winds. The wind turbine assembly may be configured around a blimp-type body having counter-rotating turbine assemblies.
摘要:
A method and device for collecting energy from wind includes an airfoil having an outer surface defining a leading edge, a central section of greatest breadth adjacent to which a Bernoulli effect reduced pressure region results as an air flow passes over the airfoil from the leading edge to a trailing edge, an air passage contained within the outer surface, and a plurality of edge nozzles penetrating the outer surface within the section of greatest breadth. The edge nozzles each have an outlet orifice oriented toward the trailing edge and an inlet orifice feeding into the air passage and being positioned to communicate between the air passage and the Bernoulli effect reduced pressure region. The airfoil is positioned in the wind with the leading edge facing substantially into the wind and with the wind passing over the edge nozzles. An airflow-driven turbine capable of converting an airflow into rotational mechanical energy is also provided, the turbine being in airflow communication with the air passage. A flow of air is drawn through the airflow-driven turbine, thence through the air passage and out through the edge nozzles into the Bernoulli effect reduced pressure region created as the wind passes over the edge nozzles. The flow of air through the airflow-driven turbine drives the turbine and converts the flow of air into rotational mechanical energy.
摘要:
Various embodiments of an apparatus and method for extracting useful work from a fluid stream are disclosed. Some embodiments comprise balanced hydrofoils comprising upper and lower semifoils joined by a member. Some embodiments comprise an array of removable hydrofoil modules wherein each module is adapted to provide an independent power contribution to an overall system, depending on speed of the fluid stream in the vicinity of the module, and each module is further adapted to provide its power contribution at a substantially consistent pressure to an array-wide high pressure fluid circuit. These and other embodiments are further disclosed herein.
摘要:
An example wind turbine diffuser has an expanded outlet area where the diffuser outlet area is greater than it's cross sectional area. The diffuser may be formed of one or more diffuser rings, at least one of which may form a turbine cowling. Each diffuser ring may have an inlet area that is smaller than the outlet area of the directly upstream ring. The portion of an upstream ring outlet which is not occluded by the downstream ring may form a diffuser outlet such that the total outlet area of the diffuser is larger than the cross-sectional area. In another example, the diffuser may comprise at least one diffuser ring and one or more suction slots that are each connected to a vent, which allows air to be removed from the diffuser system.
摘要:
A power generation structure according to an embodiment of the present invention comprises: terrain features spaced apart from each other at a first interval to thereby form a watercourse through which water can move in the front and rear directions; watercourse banks having a width narrower than the first interval and disposed on the watercourse to thereby respectively form equal-width watercourses having a constant width between the terrain features; a first water collecting bank disposed on the watercourse and formed in the shape of a tip extending from the front end of the watercourse bank on the basis of the moving direction of a tidal current, with the width being gradually decreased toward the front of the equal-width watercourse; and a second water collecting bank disposed on the watercourse and formed in the shape of a tip extending from the rear end of the watercourse bank on the basis of the moving direction of the tidal current, with the width being gradually decreased toward the rear of the equal-width watercourse.