Renewable resource hydro/aero-power generation plant and method of generating hydro/aero-power

A renewable resource power generation plant, having a) a generally vertically extending duct having an inlet, an outlet at an elevation lower than said inlet, and a side wall of a predetermined diameter and an inner surface of said sidewall being substantially smooth, and b) a power system adjacent said outlet for recovering energy from a downdraft of fluid, said power generation plant comprising:

• an adjustable spray system mounted adjacent said inlet for spraying a predetermined amount of water in droplet form into the air responsive to air flow at said inlet, thereby forming a mixture of air and water droplets which defines a fluid, wherein said duct and said spray system are structured to cooperate such that a spray of predetermined amount of water greater than a calculable maximum amount of water that would theoretically evaporate in the air throughout substantially the entire height of said predetermined duct saturates the air with vapor at the lowest point in the duct, and where by evaporation of said droplets causes said air to become cooler and denser than air outside said duct, creating an aero-cooling effect and causing the downdraft of said fluid within said duct.