In a vertical rotor apparatus that rotates in response to a moving fluid, a shaft defines an axis of rotor rotation. Rotor blades are longitudinally aligned in parallel with the shaft and each rotor blade defines an axis of blade rotation. A sensor generates a signal when any of the rotor blades are within rotor azimuthal angles of blade stall regions. A controller generates blade pitch information for the blade stall regions and an actuator, which is mechanically coupled to each of the rotor blades, alters blade pitch about the axis of blade rotation in accordance with the blade pitch information.

A turbine, in particular for harvesting energy in flowing air or flowing water, is easily adaptable to different application conditions and facilitating a comparably high degree of efficiency. This is achieved in that the basic shape of the turbine is cylindrical and is provided with blades which are parallel to an axis of the turbine. The blades are pivotally arranged in joints on the outer circumference of at least one turbine wheel. The blades are substantially L-shaped. The longer limb of the blade is curved preferably in a manner corresponding to the radius of the turbine casing, and the shorter limb lies within the surface line of the turbine.

A transportation vehicle may be equipped with electrical energy harvesting systems to harvest electrical energy for use. By way of example, in the transportation vehicle, a Venturi system may be used to receive an air flow and the speed of the air flow increase in a constricted area of the Venturi system, the air flow containing a large amount of kinetic energy. A plurality of electrical energy harvesting systems is disposed in the Venturi system and is configured to convert the kinetic energy contained in the accelerated air flow into electrical energy that can be used to power on-board electronics as well as one or more on-board batteries in the transportation vehicle, as the transportation vehicle is in motion.

A wind power plant includes a shrouded wind turbine having an annular shroud which defines a longitudinal axis and which is rotationally symmetrical thereto. A radially inner upper side of the shroud forms a flow channel for the wind, wherein a propeller which can rotate about the longitudinal axis and is intended for driving an electrical generator is rotatably mounted in the flow channel. A support, which defines a support longitudinal direction, has arranged thereon an annular shroud bearing element on which the shroud, and hence the wind turbine, can be mounted in different pivoting positions about a pivot axis, which extends transversely with respect to the support longitudinal direction.

A stowable generator device including a housing defining at least one storage chamber having an opening. A closure element is configured to selectively cover and uncover the opening. Support structure is disposed within the storage chamber in a collapsed position and is selectively extendable through the opening into an expanded position when the closure element is moved away from the opening. At least one energy generating unit is connected to the support structure. The support structure and the generating unit are configured to reversibly stow inside the housing in the collapsed position.

A wind turbine includes a blade having a leading edge, a trailing edge, and opposing first and second surfaces extending between the edges. A vortex generator pair includes a base attached to the first surface and first and second spaced apart fins extending outwardly from opposing portions of the base. The fins each have a leading edge, a trailing edge, a suction side and a pressure side. Each of the suction sides have a trailing half and a leading half.

The present invention relates to a molding made of reactive foam, wherein at least one fiber (F) is arranged partially inside the molding, i.e. is surrounded by the reactive foam. The two ends of the respective fiber (F) not surrounded by the reactive foam thus each project from one side of the corresponding molding. The reactive foam is produced by a mold foaming process. The present invention further provides a panel comprising at least one such molding and at least one further layer (S1). The present invention further provides processes for producing the moldings according to the invention from reactive foam/the panels according to the invention and also provides for the use thereof as a rotor blade in wind turbines for example.

Provided is a wind power installation for converting the kinetic energy of the wind into the mechanical energy of rotation of a rotor for subsequent conversion of the mechanical energy of rotation into the electrical energy. A wind power installation includes a support frame, a shaft disposed on the support frame, and a blade system mounted on the shaft. The shaft is configured to rotate about a vertical axis and is functionally connected to an electric generator. The support frame is configured to be mounted between at least three radially arranged structures. The wind power installation can include additional blade systems disposed one above another on the shaft. Mounting the support frame between three radially arranged structures results in greater rigidity and robustness of the wind power installation, thus enabling the use of blade systems having a larger blade area and the arrangement of several blade systems on the shaft.

A vertical axis wind turbine (2) includes a vertical rotation shaft (3a) and a plurality of vertical blades (5) arranged around the rotation shaft and attached to the rotation shaft through an arm (6a, 6b). Each of the blades (5) includes a blade main part (5a) and blade-tip inclined parts (5b) extending from upper and lower ends of the blade main part (5a) toward the rotation shaft (3a). Each of the blade-tip inclined parts (5b) has a smaller thickness than a thickness of the blade main part (5a). A wind power generating device (1) includes a vertical axis wind turbine (2) having the above configuration and a generator (3).

The variable tilting blade twin turbine windmill device is for capturing kinetic energy from the wind and is comprised of a shaft having a plurality of central hubs connectively attached, each central hub having a plurality of wind capture arms comprising a rotating wind capture blade having a capture surface and a slicing edge that are rotated by a rotating gear and drive gear combination connectively attached to said wind capture blades enabling a rotation of said wind capture blades wherein the wind capture blades are rotated between a blade-mode to capture the wind and a knife-mode to pass with less drag resistance through the air/wind thereby enabling an increase in the ability to capture more of the energy available in the wind stream.