A wind driven electricity generator may have a tower with a set of stationary airfoils mounted thereon. Each airfoil may have a slot on a low pressure side of the airfoil. Air flow may through the slot relative to an inside of the airfoil. Air flowing through the airfoil may flow through the tower. The air flowing through the tower may turn a rotor (or propeller). The rotor may turn an electrical generator to generate electricity. Each airfoil may have a slot on a high pressure side. Air flowing through the slot on the high pressure side may turn the rotor.

A wind power station with wind concentrating structure includes a wind concentrating structure, which includes a multiple of floors and a hollow cylindrical central tower (28) running through the multiple of floors; a concentrated drive shaft assembly (2) is provided at a center point O of the central tower (28) being coaxial with a ground central axis (1) and running through each floor of the central tower (28); a impeller (3) is installed on the concentrated drive shaft assembly (2) in each floor of the central tower, the impeller is a vertical axis impeller or a horizontal axis impeller; two or more sub-buildings are radially provided from a original point which is a center O of the central tower (28), outer walls of the sub-buildings are connected with a outer wall of the central tower (28) to form a speed-increasing type windage with the floor (29), a ceiling cover (13) and a ceiling cover supporting truss (14).

The solar chimney of the present invention comprises an elongated chamber having an inlet end and an outlet end, the chamber defining a path for fluid, such as air, from the inlet to the outlet. Air updrafts in the chamber drive an internal turbine which is connected to an electric generator, or to some other machine. The chamber has the general configuration of an hourglass; the diameter of the chamber becomes progressively smaller with distance from the inlet end, until the diameter reaches a minimum value, then becomes progressively larger, as one proceeds towards the outlet end. Disposed within the chamber are one or more heat exchangers for heating air in the chamber by solar and/or wind energy.

A gravity power and desalination technology system is provided, including a heat storage apparatus, an inner tube portion, a hot-air and vapor generator, and venting holes, a corrugated tube portion, an outer tube portion, an updraft wind power generator, and an artificial hydro power generator. The heat storage apparatus is provided in a lower portion and configured. The inner tube portion has an inner vent portion inside and disposed vertically over the heat storage apparatus. The hot-air and vapor generator is disposed between the heat storage apparatus and the inner tube portion. The venting holes are bored through the inner tube portion obliquely outwards. The corrugated tube portion is provided on a top portion of the outer tube portion. The updraft wind power generator and the artificial hydro power generator are installed in the lower portions of the inner vent portion and the outer vent portion, respectively.

In general a building, preferably a skyscraper, is situated with a face toward the prevailing winds of the area. Within the building is a system for capturing the prevailing winds and converting the prevailing winds into energy for use by the building or for local energy needs. The system is capable of being retrofitted into existing buildings because the elements of the system are scalable.

An elevated or ground level vertical cylinder houses one or more propellers and/or turbines that are rotated by heated air convection within or around or above the cylinder. The rotating shafts of the propellers generate electricity in an area at the bottom of or below the cylinder. For added, improved air flow directions and volumes; and, for stabilization of the rotating shaft or shafts, a cone structure is disposed below the cylinder. Heat is directed to the cylinder by a plurality of sun tracking concave mirrors that are positioned in concentric circles at various heights. The cylinder may be composed of concrete, ceramics, metal compounds or other materials and operate with a surface temperature that may range from 70 to 1,300 degrees Fahrenheit. Disclosed embodiments include the use of heat sinks, internal blades disposed upon pyramid structures and flexible vanes and flaps,

An elevated or ground level vertical cylinder houses one or more propellers and/or turbines that are rotated by heated air convection within or around or above the cylinder. The rotating shafts of the propellers generate electricity in an area at the bottom of or below the cylinder. For added, improved air flow directions and volumes; and, for stabilization of the rotating shaft or shafts, a cone structure is disposed below the cylinder. Heat is directed to the cylinder by a plurality of sun tracking concave mirrors that are positioned in concentric circles at various heights. The cylinder may be composed of concrete, ceramics, metal compounds or other materials and operate with a surface temperature that may range from 70 to 1,300 degrees Fahrenheit. Disclosed embodiments include the use of heat sinks, internal blades disposed upon pyramid structures and flexible vanes and flaps,

An elevated or ground level vertical cylinder houses one or more propellers and/or turbines that are rotated by heated air convection within or around or above the cylinder. The rotating shafts of the propellers generate electricity in an area at the bottom of or below the cylinder. For added, improved air flow directions and volumes; and, for stabilization of the rotating shaft or shafts, a cone structure is disposed below the cylinder. Heat is directed to the cylinder by a plurality of sun tracking concave mirrors that are positioned in concentric circles at various heights. The cylinder may be composed of concrete, ceramics, metal compounds or other materials and operate with a surface temperature that may range from 70 to 1,300 degrees Fahrenheit. Disclosed embodiments include the use of heat sinks, internal blades disposed upon pyramid structures and flexible vanes and flaps.

An elevated or ground level vertical cylinder houses one or more propellers and/or turbines that are rotated by heated air convection within or around or above the cylinder. The rotating shafts of the propellers generate electricity in an area at the bottom of or below the cylinder. For added, improved air flow directions and volumes; and, for stabilization of the rotating shaft or shafts, a cone structure is disposed below the cylinder. Heat is directed to the cylinder by a plurality of sun tracking concave mirrors that are positioned in concentric circles at various heights. The cylinder may be composed of concrete, ceramics, metal compounds or other materials and operate with a surface temperature that may range from 70 to 1,300 degrees Fahrenheit. Disclosed embodiments include the use of heat sinks, internal blades disposed upon pyramid structures and flexible vanes and flaps.