Delmar's Standard Textbook Of Electricity
7th Edition
ISBN: 9781337900348
Author: Stephen L. Herman
Publisher: Cengage Learning
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Textbook Question
Chapter 26, Problem 8RQ
If the load in Question 7 is connected in a wye, what would be the line voltage and line current supplying the load?
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Problem a. (i) Sketch the ideal power curve of the turbine with the following characteristics:
• rated speed is 14 m/s
⚫rated power is 1.25 MW
⚫ cut-in speed is 5 m/s
⚫furling or cut-out speed is 20 m/s
(ii) Given part (i), calculate the energy produced in one day if the wind blows
continuously between 15 and 20 m/s all day
(iii) Can the energy produced in one year be determined if you are told that the
average wind speed is 14 m/s? Explain why.
Problem b. Suppose an anemometer mounted at a height of 10 m with a 20-m/s average wind
speed
(i) Estimate the average wind power at a height of 10 m, assuming Rayleigh
statistics and under the following weather conditions
• 15°C
(ii) Suppose a 1300-kW wind turbine with 60-m rotor diameter is located in those
winds with speed computed in the first condition of part (i). Determine the annual
energy production with a 30% wind turbine efficiency
(iii) Evaluate the wind turbine capacity factor
Q3/Using Kirchhoff's laws to determine: (6degrees)
a) The current (Irsa)
b) The voltage across the Ri (V750)
c) Calculate the power by each voltage source.
d) Calculate the power of each resistor of the network.
V3
12V
V2
R1
3V
R2
1250
Chapter 26 Solutions
Delmar's Standard Textbook Of Electricity
Ch. 26 - How many degrees out of phase with each other are...Ch. 26 - What are the two main types of three-phase...Ch. 26 - A wye-connected load has a voltage of 480 V...Ch. 26 - A wye-connected load has a phase current of 25 A....Ch. 26 - A delta connection has a voltage of 560 V...Ch. 26 - A delta connection has 30 A of current flowing...Ch. 26 - A three-phase load has a phase voltage of 240 V...Ch. 26 - If the load in Question 7 is connected in a wye,...Ch. 26 - An alternator with a line voltage of 2400 V...Ch. 26 - What is the apparent power of the circuit in...
Ch. 26 - You are working in an industrial plant. A bank of...Ch. 26 - You are a journeyman electrician working in an...Ch. 26 - You are an electrician working in an industrial...Ch. 26 - Refer to the circuit shown in Figure 26-19 to...Ch. 26 - Refer to the circuit shown in Figure 26-20 to...Ch. 26 - Refer to the circuit shown in Figure 26-21 to...Ch. 26 - Refer to the circuit shown in Figure 26-22 to...
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