Question

Aero turbine is the fraction of power in the wind through the swept area which is converted into useful mechanical shaft power is called _____________

(a) Coefficient of performance

(b) Coefficient of variation

(c) Coefficient of lift

(d) Coefficient of spin

This question was posed to me in a job interview.

The doubt is from Vertical Axis Wind Mill topic in division Wind Energy of Energy Engineering

Answer 1

The correct answer is (a) Coefficient of performance

The best explanation: The coefficient of performance of an aero turbine is the fraction of power in the wind through the swept area which is converted into useful mechanical shaft power. Cp for horizontal axis wind machine has theoretical maximum value = 0.593.