Wind energy is the kinetic energy of the air in motion. Total wind energy flowing through an imaginary area A during the time t is: E = A . v . t . ρ . ½ v where v is the wind velocity and ρ is the air density. The formula presented is structured in two parts: (A . v . t) is the volume of air passing through A which is considered perpendicular to the wind velocity; (ρ . ½ v) is the kinetic energy of the moving air per unit volume. Total wind power is: P = E - t = A . ρ .
