Homework Help is Here – Start Your Trial Now!
Engineering
Chemical Engineering
Problem 1.29 (modified), Masters and Ela, Introduction to Environmental Engineering and Science, 3rd Ed.: A 950-MWe power plant has an efficiency of 39 percent with 20 percent of the waste heat being released to the atmosphere as exhaust stack heat and the other 80 percent taken away in the cooling water. Consider two cases for power plant cooling. a. Cooling water is drawn from a river with an upstream flow of 110 m³/s and a temperature of 15 °C and is returned to the river after cooling the power plant. i. Is the system an open system or closed system? ii. Construct an energy balance for the system. iii. If the cooling water is only allowed to rise in temperature by 13 °C, what flow rate from the river would be required?

Problem 1.29 (modified), Masters and Ela, Introduction to Environmental Engineering and Science, 3rd Ed.: A 950-MWe power plant has an efficiency of 39 percent with 20 percent of the waste heat being released to the atmosphere as exhaust stack heat and the other 80 percent taken away in the cooling water. Consider two cases for power plant cooling. a. Cooling water is drawn from a river with an upstream flow of 110 m³/s and a temperature of 15 °C and is returned to the river after cooling the power plant. i. Is the system an open system or closed system? ii. Construct an energy balance for the system. iii. If the cooling water is only allowed to rise in temperature by 13 °C, what flow rate from the river would be required?

Introduction to Chemical Engineering Thermodynamics
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
See similar textbooks
icon
Related questions
Question
Problem 1.29 (modified), Masters and Ela, Introduction to Environmental Engineering and Science, 3rd Ed.: A 950-MWę power plant has an efficiency of 39 percent with 20 percent of the waste heat being released to the atmosphere as exhaust stack heat and the other 80 percent taken away in the cooling water. Consider two cases for power plant cooling. a. Cooling water is drawn from a river with an upstream flow of 110 m³/s and a temperature of 15 °C and is returned to the river after cooling the power plant. i. Is the system an open system or closed system? ii. Construct an energy balance for the system. iii. If the cooling water is only allowed to rise in temperature by 13 °C, what flow rate from the river would be required? b. If instead of drawing water from a river, heating it, and returning it to the river, the plant could use an evaporative cooling tower wherein heat is released to the atmosphere as cooling water is vaporized into steam. i. Is the system an open system or closed system? ii. Construct an energy balance for the system iii. At what flow rate must 15 °C makeup water be provided from the river to offset the water lost in the cooling tower?
Transcribed Image Text:Problem 1.29 (modified), Masters and Ela, Introduction to Environmental Engineering and Science, 3rd Ed.: A 950-MWę power plant has an efficiency of 39 percent with 20 percent of the waste heat being released to the atmosphere as exhaust stack heat and the other 80 percent taken away in the cooling water. Consider two cases for power plant cooling. a. Cooling water is drawn from a river with an upstream flow of 110 m³/s and a temperature of 15 °C and is returned to the river after cooling the power plant. i. Is the system an open system or closed system? ii. Construct an energy balance for the system. iii. If the cooling water is only allowed to rise in temperature by 13 °C, what flow rate from the river would be required? b. If instead of drawing water from a river, heating it, and returning it to the river, the plant could use an evaporative cooling tower wherein heat is released to the atmosphere as cooling water is vaporized into steam. i. Is the system an open system or closed system? ii. Construct an energy balance for the system iii. At what flow rate must 15 °C makeup water be provided from the river to offset the water lost in the cooling tower?
Expert Solution
steps

Step by step

Solved in 4 steps with 4 images

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Recommended textbooks for you
Introduction to Chemical Engineering Thermodynami…
Introduction to Chemical Engineering Thermodynami…
Chemical Engineering
ISBN:
9781259696527
Author:
J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:
McGraw-Hill Education
Elementary Principles of Chemical Processes, Bind…
Elementary Principles of Chemical Processes, Bind…
Chemical Engineering
ISBN:
9781118431221
Author:
Richard M. Felder, Ronald W. Rousseau, Lisa G. Bullard
Publisher:
WILEY
Elements of Chemical Reaction Engineering (5th Ed…
Elements of Chemical Reaction Engineering (5th Ed…
Chemical Engineering
ISBN:
9780133887518
Author:
H. Scott Fogler
Publisher:
Prentice Hall
Process Dynamics and Control, 4e
Process Dynamics and Control, 4e
Chemical Engineering
ISBN:
9781119285915
Author:
Seborg
Publisher:
WILEY
Industrial Plastics: Theory and Applications
Industrial Plastics: Theory and Applications
Chemical Engineering
ISBN:
9781285061238
Author:
Lokensgard, Erik
Publisher:
Delmar Cengage Learning
Unit Operations of Chemical Engineering
Unit Operations of Chemical Engineering
Chemical Engineering
ISBN:
9780072848236
Author:
Warren McCabe, Julian C. Smith, Peter Harriott
Publisher:
McGraw-Hill Companies, The
SEE MORE TEXTBOOKS