Subtopic: Sources of power on the farm – human, animal, mechanical, electrical, wind, solar and biomass
Question Statement:
According to Betz's law, the maximum theoretical aerodynamic power coefficient ($C_{p,max}$) that any wind turbine rotor can extract from wind kinetic energy is:
Options:
(A) 16/27 (59.3%)
(B) 1/2 (50.0%)
(C) 2/3 (66.7%)
(D) 100%
Answer Key:
A
Step-by-Step Solution & Explanation
Albert Betz derived that downstream wind velocity deceleration beyond $1/3$ limits rotor kinetic energy capture to $16/27 \approx 59.3\%$.