Wind power technology - Wind Power Integration: Connection and System Operational Aspects - page 57

Rotor brake
Gearbox

Electrical
controls

Rotor blade

Wind

Rotor hub

Generator
Yaw system

Tower

Connection to
power grid

Foundations

Figure 3.1 Horizontal axis wind turbine

P wt
P air

C P ¼ ð 3 : 3 Þ

1
2 r AV 3

P wt ¼ C P P air ¼ C P ð 3 : 4 Þ

It can be shown that for any fluid turbine there is a maximum power that can be
extracted from the fluid flow, as given by

16
27

C P max ¼ or 0 : 593