Subtopic: I.C. engine systems – fuel, cooling, lubrication, ignition, electrical, intake and exhaust
Question Statement:
According to Betz's law, the theoretical maximum aerodynamic power coefficient ($C_p$) that can be extracted from wind by an ideal wind turbine rotor is:
Options:
(A) $\frac{16}{27} \approx 0.593$
(B) $\frac{1}{2} = 0.500$
(C) $\frac{2}{3} \approx 0.667$
(D) $\frac{8}{27} \approx 0.296$
Answer Key:
A
Step-by-Step Solution & Explanation
Betz's limit proves from momentum and continuity principles that the maximum kinetic energy fraction extractable by an open-flow wind rotor is $C_{p,\max} = \frac{16}{27} \approx 59.3\%$.