Week 9

Calculation of wind turbines:

For this semester final year project,this wind turbines can't be done.Below are the calculation for wind turbines that was estimate the value.

If you have a small wind turbine with a blade diameter of 1 m (about 3 ft) and an operating efficiency of 20% at a wind speed of 6 m/sec (about 13.4 mph). Then, to calculate how much power the turbine can generate at this wind speed:

Rotor swept area: Area = Π × (Diameter/2)² = 3.14 × (1/2)² = 0.785 m²

Available power in the wind: P_wind= Air Density × Area × v³/2 = 1.2 × 0.785 × 6³/2 = 101.7 watt

Then the power that can be extracted from the wind assuming 20% turbine efficiency is:
P_turbine=0.20 × 101.7 = 20.3 watts

If this ran continuously for a year (about 8,750 hours) then it would produce: 20.3 watts × 8,750 hours = 177,625 watt-hours, or about 177 kWh in a year.

Used the density of air at sea level, which is about 1.2 kg/m³