A 3-bladed wind turbine with 250 kW generator has diameter of 50 m and tower height of 60 m. It is designed to have Cp of 0.25 at wind speed of 12 m/s when regulation starts. The cut-in and furling Speeds for the machine are 5 m/s and 20 m/s respectively. Mechanical and electrical efficiencies are 90 % and 95 %. By assuming the density of air as 1.225 kg/m3. Calculate a. What is power developed by the rotor at 12 m/s when regulation starts? b. If the tip-speed ratio at this wind speed is 4.2, then what is the rpm of the rotor? c. Calculate the actual torque developed. d. Calculate the maximum possible annual power output.
A 3-bladed wind turbine with 250 kW generator has diameter of 50 m and tower height of 60 m. It is designed to have Cp of 0.25 at wind speed of 12 m/s when regulation starts. The cut-in and furling Speeds for the machine are 5 m/s and 20 m/s respectively. Mechanical and electrical efficiencies are 90 % and 95 %. By assuming the density of air as 1.225 kg/m3. Calculate a. What is power developed by the rotor at 12 m/s when regulation starts? b. If the tip-speed ratio at this wind speed is 4.2, then what is the rpm of the rotor? c. Calculate the actual torque developed. d. Calculate the maximum possible annual power output.
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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A 3-bladed wind turbine with 250 kW generator has diameter of 50 m and tower height of 60 m. It is designed to have Cp of 0.25 at wind speed of 12 m/s when regulation starts. The cut-in and furling Speeds for the machine are 5 m/s and 20 m/s respectively.
a. What is power developed by the rotor at 12 m/s when regulation starts?
b. If the tip-speed ratio at this wind speed is 4.2, then what is the rpm of the rotor?
c. Calculate the actual torque developed.
d. Calculate the maximum possible annual power output.
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