A system and method for improving efficiency of vertical axis wind turbines for all wind directions, comprising an inlet convergent section, a wind turbine section adjacent to exit of convergent section and an outlet divergent section. The system provides an air passage through the inlet section, the wind turbine and the outlet section, and allows for variation of the inlet and outlet depending on wind direction, in order to maximize efficiency harnessed within a time interval in accordance to wind direction and wind speed.

Wind turbine according to the invention has at least one movable guide consisting of two rectangular wings (14) and (15) set in one plane and fixed with one edge to mounted shaft (11) set parallel to the axis of the turbine (2) and in such way that the edge of the first wing (14) is tangential, with small space, to the edge of the bar (10) which is an extension of the guide vane (4) of the body (3) and is set in the same plane as guide vane (4), where the edge of the first wing (14) rests on resilient members (16) fixed to the bar (10), and spread of the second wing (15) is smaller than the spread of the first wing (14) and the shaft (11) is connected to drive mechanism (13) equipped with positional switch, where the drive mechanism (13) is connected to control system.

A vertical-axis wind turbine generator includes two or more rotor assemblies, each rotor assembly having two or more wind turbine blades mounted for rotation, preferably those having a Savonius configuration. A cowling includes a nose portion forming a bifurcating wind diverter, in which the bifurcated airflow is directed in order to cause counter directional flow of the wind turbine blades. According to at least one version, the cowling further includes a cover portion that defines a venturi chamber above the rotating blades to draw air into the top of the turbine above the rotating blades and create a vacuum, thereby reducing resistance. The cowling can be part of an existing wind turbine or alternatively replace an original cowling as a retrofit.

Proposed is a wind turbine having a vertical axis rotor mounted in a fixed cylindrical housing provided with outwardly opening shutters. The rotor consists of a rotating core comprising core blades fastened between two circular bases and forming a Ugrinsky rotor, and an annular impeller configured for independent rotation about said core. The impeller comprises impeller blades fastened between two ring-shaped bases and forming a continuation of the core blades, wherein common inter-blade channels are formed which narrow toward the centre of the rotor. Also proposed are wind power stations based on the wind turbines described above, said turbines being mounted vertically one above the other to form a generating tower, or being mounted on a facade of a high-rise building. Technical result consists, in particular, in increasing the efficiency of the wind turbine and making it possible to incorporate wind power stations into an urban environment.

A vehicular wind turbine system includes a vehicle having a propulsion system. The vehicular wind turbine system further includes a first wind turbine attached to the vehicle. The first wind turbine includes a plurality of turbine blades coupled to an electric generator. The first wind turbine is configured to convert energy from a relative wind into electrical energy via the electric generator. The system further includes a battery disposed within the vehicle to store electrical energy from the first wind turbine. The system further includes an electric motor configured to convert electrical energy stored in the battery into kinetic energy. The vehicle is to be propelled by at least the electric motor.

The present invention is an energy storage system comprising a mechanical bellows having an outer flexible material casing with one or more functional elements that operate as actuators for expanding and contracting the outer flexible material casing to store or deliver energy.

The electrical power generation system using renewable energy is particularly adapted to provide electrical power to an independent or remotely situated electrical device such as a street light, emergency call box, or illuminated road sign. The system includes a pivotally mounted venturi with vanes assuring that the venturi is oriented into the prevailing wind. A vertical axis wind turbine is installed in the venturi throat, and drives a shaft extending through the column upon which the venturi is installed to a generator at the base of the column. The venturi and vanes may include photovoltaic cells thereon for further electrical power. The venturi may be heated from a geothermal source, and may include a variable diameter internal wall to adjust the cross-sectional area of the throat of the venturi. The use of functionally graded materials and other phase change materials may also improve the performance of the device.

A vertical-axis renewable-power generator is an apparatus that is used to efficiently generate power in various weather conditions using renewable energy sources. The apparatus includes a vertically-oriented foil and a fluid turbine. The foil is designed to generate areas of relative high fluid velocity and low pressure on one side and relative lower fluid velocity and higher pressure on the opposite side. The foil is also self-directing so that the foil can follow the direction of the fluid flow. The fluid turbine is integrated into the foil so that the fluid turbine can be rotated by the high-speed fluid flow. The rotation of the fluid turbine can be used to generate electricity. The apparatus conforms to the Bernoulli's principle that is proven to increase the speed of the fluid flow over the foil, which is used to increase the speed of the fluid flow impacting the fluid turbine.

A regulatable air-flow acceleration unit for wind energy conversion equipment is presented. The novel regulatable air-flow acceleration unit includes a wind acceleration channel containing pressure-limiting devices arranged in a novel sequential way, protruding from above and from below into the wind acceleration channel which creates a variable degree of restriction. The pressure-limiting devices contain a regulation valve having a rotation axle connected to a tilting body that can be positioned in the radial direction in the case of air-flow acceleration units arranged in a circular cylinder section shape used in vertical axle turbines allowing for smoother and finer regulation during the movement of the tilting bodies.

Disclosed is a vertical axis wind turbine air concentration tower with reduced radar cross section. The air concentration tower has a polygonal outer perimeter, a pivot located at each vertex of the polygonal outer perimeter, and an inwardly-positioned rudder blade operatively connected at each pivot. Each inwardly positioned rudder blade has a first wind-neutral position, and is pivotable through a plurality of angles that adjust based on an incoming wind direction, such that the incoming wind is channeled to the vertical axis wind turbine, which is located approximately at a center area of the polygonal outer perimeter. A radar absorbent material is applied to the vertical axis wind turbine air concentration tower to reduce the radar cross section. The air concentration tower is designed to provide higher wind speed to the vertical axis wind turbine than the surrounding ambient air.