Calculate the speed of the turbine rotor (rpm). Is it considered fast or slow?

Power System Analysis and Design (MindTap Course List)
6th Edition
ISBN:9781305632134
Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Chapter12: Power System Controls
Section: Chapter Questions
Problem 12.13P
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A turbine has a power coefficient equal to 0.3 when the wind speed is 7 m / s. This turbine is coupled, through a multiplier, to an asynchronous generator  of rotor in cage which, in turn, is connected to the distribution network. Considering the data,

Air density: 1.25 kg / m3
Blade radius: 15 m
Multiplier coefficient: 50
Number of asynchronous generator's pole pairs: 2
Mains frequency: 60 Hz
1% slip
 
Calculate the speed of the turbine rotor (rpm). Is it considered fast or slow?
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 


 
 
 
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