In a wind powered generator, can someone give me a formula to calculate wind speed, blade length, etc.?

Question

If I know what Kw output I am looking for, what wind speed etc. is required to achieve this.

Thanks to all

Answer 1

Available electric power = .6125 x D x A x V3 x E

where:

D = air density ratio at elevation x density ratio at temperature

A = swept area in square meters (blade length² x 3.14)

V = wind speed in m/s

E = blade efficiency (obtained from manufacturer or dealer)

(To convert miles-per-hour to meters-per-second, multiply by 0.447.)

A density calculator can be found here.  You will have to provide the information for your area.

http://wahiduddin.net/calc/calc_da.htm