An anemometer mounted at a height of 10 m above a surface with crops, hedges and shrubs, shows a windspeed of 5 m/s. Assuming 15°C and 1 atm pressure, determine the following for a wind turbine with the hub height 60 m and rotor diameter of 60 m:
(a) Estimate the windspeed and the specific power in the wind (W/m2) at the highest point that a rotor blade reaches (use Eq 15-1)
(b) Repeat at the lowest point
Equation 15 -1
P"(v) = P(v) /A = (p/2) v3, W/m2