Abstract: An apparatus may include a reservoir; a stopper dividing the reservoir; a water fill pipe configured to provide the water to a lower portion of the reservoir; and an outlet pipe connected to the lower portion of the reservoir. The apparatus may further include a compressed air feed pipe which may provide compressed air to an upper portion of the reservoir to press on the stopper so that the water is forced by the stopper to escape from the lower portion of the reservoir through the outlet pipe. A processor included in the apparatus may be configured to determine a water pumping rate of the water while the water escapes through the outlet pipe, and to control the compressed air feed pipe to provide the compressed air at an air pumping rate equal to the water pumping rate.

Abstract: The invention is directed to wind turbines operating inside (closed) buildings. These isolated turbines are operated by (naturally) pumping the wind from one side of a building and (mechanically) expelling it from the other side by means of (suction) fans. Alternatively, the turbines can be operated by (mechanically) pumping wind from one side of a building and (mechanically) expelling it from the other side by (suction) pumps that withdraw wind from the building and expel it continually generating a strong air stream in the building having the required velocity for actuating the turbines efficiently. Many adjacent buildings can be constructed, wherein they are connected to each other by tubes that may allow easy transfer of the wind from a building to another. It is only the first building that (naturally or mechanically) receives (natural or mechanical) wind.

Abstract: An apparatus for compressing and pumping water, including a reservoir; a stopper dividing the reservoir; a water fill pipe configured to provide the water to a lower portion of the reservoir; an outlet pipe connected to the lower portion of the reservoir; a compressed air feed pipe configured to provide compressed air to an upper portion of the reservoir such that the compressed air presses on the stopper and the water is forced by the stopper to escape from the lower portion of the reservoir through the outlet pipe; and a processor configured to determine a water pumping rate of the water while the water escapes through the outlet pipe, and to control the compressed air feed pipe to provide the compressed air at an air pumping rate equal to the water pumping rate.