P. 4536. The theoretical limit of the efficiency of wind turbines is the so called Betz-limit is 59.3%. There are other losses, but the most modern wind turbines efficiency is approximately 84% of the Betz-limit.
a) How many megajoule kinetic energy is carried during 1 second by an air flow of speed of 27 km/h to that wind turbine which is at a height of 100 m, and which has 44 m-long blades?
b) What is the maximum output power of the turbine at this wind speed?
Deadline expired on 10 May 2013.