(a) A gear box is placed between a wind turbine rotor and an electrical generator in order to match the efficient rotating speeds of the two components. The wind turbine operates at a maximum power coefficient Cp = 0.41 at a tip speed ratio = 10. The rated wind speed is 12 m/s and the blade radius is 20 m. The generator rotates at a constant speed of 3000 rev/min. The air density is 1.225 kg/m³. %3D

(a) A gear box is placed between a wind turbine rotor and an electrical generator in order to match the efficient rotating speeds of the two components. The wind turbine operates at a maximum power coefficient Cp = 0.41 at a tip speed ratio = 10. The rated wind speed is 12 m/s and the blade radius is 20 m. The generator rotates at a constant speed of 3000 rev/min. The air density is 1.225 kg/m³. %3D

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

See similar textbooks

Similar questions

• A generator driven by a wind turbine is required to deliver 1.5MW of power at the generator terminals. The turbine is a two-blade propeller rotating about a horizontal axis. The rotor is designed to operate at a rotational speed of 22 rpm. • If the turbine delivers its rated power at a wind average speed of 22 mph, Calculate the corresponding diameter of the propeller and its TSR, assuming a typical value of 0.35 for the overall efficiency. The air density may be assumed to have a value 1.29 kg/m³.
A cylindrical rotor machine is delivering active power of 0.85 p.u. and reactive power of 0.62 p.u. at a terminal voltage of 1.1 p.u. If the power angle is 23°, compute the excitation voltage and the machine’s synchronous reactance.
For a dc machine, its commutator has a diameter of 50 c rotating at 1000 rpm. For a brush width of 1 cm, the time commutation taken by the machine will be _________a) 0.382 msb) 0.456 msc) 0.573 msd) 0.312 ms
1
Which of the following statements related to wind turbine types are true? Select one or more: a. The Savonius rotor will not start without an auxiliary motor b. In modern industrial-sized wind turbines, the most common type of turbine is a 3-bladed wind turbine. c. In a downwind turbine, the blades are on the (upper) side of the wind when viewed from the nacell
Find the torque developed in an induction machine rotating at 1434rpm if the power developed is 4kw. O a. 53.27 O b. 0.03 c. 83.68 O d. 26.64
A 5MW rated power wind turbine has a rotational speed of 20 rpm. If the wind speed is 54km/hr and the tip speed ratio is 4.2, what is its blade length? O a. 20m Ob. 60.16m. O c. 30.08m O d. 40m.
A 2300V, 1000 kVA, 0.8 lagging power factor, two-pole, 60HZ, Wye-connected, synchronous generator has a synchronous reactance of 1.1 ohms and an armature resistance of 0.15 ohms. Its losses due to friction and friction with the air are 24 kW and its core losses are 18 kW. The field circuit has a dc voltage of 200v and a maximum of 10A. The field circuit current is adjustable in the range of 20 to 200 ohms.The magnetization curve of this generator is shown in the figure below.a) How much field current is required for Vt to equal 2300V when the generator is running without load?b) What is the voltage generated intermittently by this machine at nominal conditions?c) How much field current is needed to make the voltage at the terminals Vt=2300V when the generator works in nominal conditions?d) How much power and torque should the prime mover of the generator be able to supply?
Choose the correct option does not have self-starting torque DC Motor EMF due to Mutual inductance Choose... DC Motor Generated EMF DC Generator Back EMF Transformer EMF due to rotating magnetic field Single phase system Three phase induction motor
Write a MATLAB program describing the following figure. one cycle TIME PRESSURE amplitude
The current generated by the waterwheel generator changes direction as the wheel rotates, that is, it is an alternating current. Could you design a simple generator like this that would induce a current that continuously flowed in one direction (a DC current)? If not, explain why not. If so, describe and sketch your model solution below.
HAWT type wind turbine has the following data, height of tower =100 m, diameter of rotor = 80 m, determine the power extracted by the turbine, if the wind speed at this height is 15 m/s, and reduced by 20 %, suppose the air density is 1.3 kg/m3. * Pm = = 2.6 MW. Pm = = 3.6 MW. Pm = = 4.6 MW. Pm = = 5.6 MW.