A wind turbine gives the following data: Blade length= 51 m. Wind speed = 12 m/s Air density = 1.229 Kg/m³ Power coefficient = 0.4 Assuming equal efficiencies for gearbox and generator, If the Power output from wind turbine, P is 0.7 MW, then find a) Rotor Power Output, P- in MW b) Wind Power, Py, in MW C) Efficiency of Generator

A wind turbine gives the following data: Blade length= 51 m. Wind speed = 12 m/s Air density = 1.229 Kg/m³ Power coefficient = 0.4 Assuming equal efficiencies for gearbox and generator, If the Power output from wind turbine, P is 0.7 MW, then find a) Rotor Power Output, P- in MW b) Wind Power, Py, in MW C) Efficiency of Generator

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

4
B/ A shunt generator delivers 450 A at 230 v and the resistance of the shunt field and armature are 502 and 0.03 2 respectively. calculate the generated e.m.f
1
(b) Derive the expression of torque in terms of the MMF produced in stator and rotor.
Compare and contrast a cumulative compound DC generator and a differential compound DC generator in terms of performance. Note: Explain in no more than 70 words
C Dc machine - Prat-3.pdf %20Digital/Desktop/JSI/Dc%20machine%20-%20Prat-3.pdf Solved Example - A 25 kW Shunt Generator generates terminal voltage 400V at full load and has resistances of field and armatures as 2000 and 1.750 respectively. Calculate the efficiency of generator at full load, when iron, friction and windage losses to be 600W. of
4. Two 3300 V star-connected alternators running in parallel supply the following loads : 800 kW at unity p.f.; 600 kW at p.f. 0-8 lagging; 400 kW at p.f. 0-707 lagging The armature current of one machine is 150 A at p.f. 0-85 lagging. What is the armature current, output and p.f. of the other machine? [200 A; 1071 kW; 0-937 lagging]
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 long shunt compound dc generator supplies a current of 100 A at a voltahe of 220 V. If the resistance of the shunt field is 50 ohms, of the series field are respectively 0.05 ohm, 110 ohms and 0.06 ohm. If the overall efficiency of the above load is 88%, find the iron and friction losses.
Please see attached picture
2MVA, 2.3kV 3Ø Y-connected alternator operates at rated kVA at a power factor of 80%. The DC armature winding resistance between terminals is 0.08Ω. The field takes 70A at 125V from an exciter equipment. Friction and windage loss is 20kW, iron losses 36kW and stray load losses are 2kW. Calculate the efficiency of the alternator. Assume the effective armature winding resistance is 120% of the DC resistance.
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.