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What size of wind turbine blade would you need for 16.7 kW wind turbine with wind...

What size of wind turbine blade would you need for 16.7 kW wind turbine with wind speeds of 32mph? Report your answer in feet. Assume 45% efficiency.

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Answer #1

The formula for wind turbine power is,

Power(W)= (π/2)*(radius of blade)^2*(velocity of air)^3*(air density)*(efficiency factor)

considering air density to be 1.25 kg/m^3

32mph=14.3mps

putting the respective values

16700=(π/2)*(radius of blade)^2*(14.3)^2*(1.25)*(.45)

16700=1.571*(radius of blade)^2*204.49*(1.25)*(.45)

16700=(radius of blade)^2*180.70

16700/180.70=(radius of blade)^2

radius of blade= 9.61 m

Radius of blade should be 9.61 m to generate a power of 9.61 kW from the turbine

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