Abstract:
Die Erfindung betrifft eine Vorrichtung zur Umsetzung der Energie eines strömenden Mediums in eine Drehbewegung mit einem drehbar gelagerten Grundkörper, wobei die Drehachse des Grundkörpers etwa so normal zur Anströmrichtung verläuft, wobei am Grundkörper mindestens eine Schaufelanordnung angeordnet ist.
Abstract:
The invention relates to an air turbine for a wave power station, which is driven by a bidirectional current of air and which comprises at least one rotor arrangement having a first rotor, and at least one second rotor arrangement having a second rotor; the first rotor and the second rotor maintaining their sense of rotation, independent of the direction of incoming air, when the air turbine is operated, and defining an axially flown rotor pair in a flow channel, one of the rotors being the upstream rotor and the other rotor being the downstream rotor depending on the direction of incoming air. The air turbine is characterized in that guide vanes are arranged between the first rotor and the second rotor and reduce the spin of the air current produced by the upstream rotor.
Abstract:
A hydrokinetic energy conversion system (HKECS) is provided, comprising design configurations suitable for efficient production of tidal or river in-stream kinetic energy into useful mechanical energy for tasks such as generating electricity or water pumping. The apparatus includes a set of blades with an airfoil cross sectional contour moving on a horizontal or vertical closed loop track, whereby the blades are propelled through the water by a net tangential lift force, rather than drag, to effectively convert the kinetic energy of flowing water to useful power.
Abstract:
A device (1) is described for generating energy, composed of at least two ultralight airfoils (3, 5) rotating along their own axis, which functionally reproduce the characteristics of a propeller. The ultralight airfoils (3, 5) which characterise such aerodynamic configuration use pulling means (9, 14, 20) to keep their shape when operating. An important weight reduction of the structure is thereby obtained, which allows different applications in the aeolian generation field.
Abstract:
A wind turbine having a rotor (22) mounted within a housing (21), the rotor having blades (23) profiled and arranged so as to utilise both lift and drag effects during operation. The housing also includes airflow directing means (24, 25) to create a desired airflow within the housing (21), and is suitable for installation in residential or commercial buildings and may be mounted on roofs (29).
Abstract:
Double blade airfoils and related systems are disclosed. The double blade design may efficiently use a minimal amount of material yet achieve exceptional aerodynamic efficiencies well above the previously understood theoretical maximum. The disclosed designs may operate at lower wind speeds than those known in the art. Furthermore, the balance of forces generated by the disclosed designs may also reduce the stress felt by the airfoils and rotor, enhancing the longevity of the system.
Abstract:
Kite power system comprising a ground control unit with a generator (30), and a kite connected to the generator (30) via at least two main traction cables (10, 11). A rotor part (31) of the generator (30) comprises a winch pulley (32, 33) for each of the at least two main traction cables (10, 11), and each of the winch pulleys (32, 33) is indirectly mechanically connected to the generator (30). A further aspect relates to a kite for use in a kite power generation system, having an airfoil shaped body (20) with one or more air filling apertures (23) in a leading edge part of the airfoil shaped body (20). At least two main traction cables (10, 11) are connected to the airfoil shaped body (20), which further comprises an additional filling aperture (21) in a side part of the airfoil shaped body (20).
Abstract:
A wind turbine assembly comprising a generally cylindrical wind turbine rotor that is supported by a rotor support and operable to rotate about a rotational axis, the rotor comprising a plurality of aerofoil blades with each aerofoil blade having a leading edge, a trailing edge, a suction surface, a pressure surface, and an aerofoil chord having a chord length between the leading edge and the trailing edge, the aerofoil blades being in a generally cylindrical arrangement around the rotational axis with the leading edges at a larger radial separation from the rotational axis than the trailing edges, and the chords being angled relative to radii through the rotational axis such that the suction surfaces and pressure surfaces respectively face generally outwardly and inwardly from and to the rotational axis, wherein the minimum separation (S) between the leading edge of a first aerofoil and the suction surface of an adjacent aerofoil is less than the chord length (L C ), and wherein the location of the maximum thickness of each aerofoil blade (L Tmax ) along the chord (L C ) is less than 20% of the chord length (L) from the leading edge.
Abstract:
The invention relates to wind power plants, wherein an airfoil, using side rudders bringing about independent alignment of the airfoil to the wind direction, periodically slides upward or downward due to the wind force in an upward or downward direction, wherein the direction of motion of the airfoil is changed by tipping or rotating at the reversal points at the ends of the mast equipped with appropriate technical means. The airfoil thus generates kinetic energy in both phases of motion, which can be converted into electrical energy directly by means of a linear generator, or into mechanical energy by means of ropes, chains, or the like and optionally into electrical energy by means of a generator. Existing chimneys, ship and other types of masts, and trees can be used as the mast.
Abstract:
Wind turbine with application of several aerodynamic effects is a vertical axis wind turbine, including: flat blades rotor (3) surrounded by membrane (4) placed between airfoils (6), with redirecting duct unit (7) being integrated into airfoil (6) and having inlet opening to prevent the rotor (3) from direct front edge exposure to wind current (1) and ejecting in direction (13), thus rotating the rotor (3) in direction (2). The airfoils (6) guide air in direction (5) due to area shape and Coanda effect and rotate the rotor (3) by means of vortex flux created by their profile.