A pressure generating device has a housing and a lamellar arrangement with a number of lamellae separated by gaps. The lamellae are manufactured from solar glass. The pressure generating device has a means for converting the solar energy incident through the lamellar arrangement into thermal energy, such that, by this means the air situated in the interior of the pressure generating device can be heated. The pressure generating device has at least one air inlet opening through which air can enter the interior of the pressure generating device and at least one second air outlet opening through which the heated air can emerge from the interior of the pressure generating device.

A power generating wall design, which may include a plurality of turbines, such as wind turbines, arranged in a wall pattern and arranged to have an entrance flow on one side of the wall and an exit flow on another side of the wall. One exemplary embodiment of a power generating wall may incorporate wind turbines, and may be used in a high-wind environment, such as a highway. In another exemplary embodiment, a power generating wall may incorporate other types of turbines, such as water-driven turbines, and may be constructed in a location that is wholly or partially underwater, such as a river or tidal basin.

A ventilator (10) comprises a ventilator stator (12) for mounting to a structure and a ventilator rotor (14) for mounting and rotation with respect to the stator. One or more wind drivable elements (44) are mounted to the ventilator rotor. A motor (20) is provided for operation between the ventilator rotor and ventilator stator for selective motor-driven rotation of the ventilator rotor.

A ventilator (10) comprises a ventilator stator (12) for mounting to a structure and a ventilator rotor (14) for mounting and rotation with respect to the stator. One or more wind drivable elements (44) are mounted to the ventilator rotor. A motor (20) is provided for operation between the ventilator rotor and ventilator stator for selective motor-driven rotation of the ventilator rotor.

A wind turbine including a body, a blade set, a guiding module, a door set, and a fluid recovering element is provided. The body has a fluid inlet and a fluid outlet, wherein the fluid inlet includes a guiding area and a first opening area. The fluid outlet also includes a fluid recovering area and a second opening area. The blade set is pivoted in the body along a pivoting direction. The guiding module is disposed in the guiding area, and the door set is moveably disposed in the fluid inlet. The fluid recovering element is disposed in the fluid recovering area. The fluid recovering element covers a portion of the fluid outlet for guiding the working fluid to pass through the blade set and flow back into the body.

A ventilator having a ventilator stator for mounting to a structure and a ventilator rotor for mounting and rotation with respect to the stator. One or more wind-drivable elements are mounted to the ventilator. A motor is provided for operation between the ventilator rotor and ventilator stator for selective motor-driven rotation of the ventilation rotor.