Homework Help is Here – Start Your Trial Now!
Engineering
Mechanical Engineering
(a) In thermodynamics, throttling valves and turbines can be analyzed as steady flow devices. Common assumptions in the analysis of these devices include adiabatic process and negligible changes in kinetic energy and potential energy. Describe one difference between the throttling valve and the turbine. (b) Air undergoes an adiabatic throttling process with negligible changes in kinetic energy and potential energy. If the temperature of the air remains constant during this process, does this process violates the first law of thermodynamies? Explain your answer. An ideal gas enters a turbine with a velocity of 40 m/'s through an inlet pipe with a diameter of 160 mm. The ideal gas enters the turbine at a temperature of 660'C and a pressure of 800 kPa. The idecal gas leaves the turbine with a velocity of 150 m/s through an outlet pipe with a diameter of 100 mm. The power output from the turbine is 350 kW. The heat lost from the turbine to the surrounding amounts to 6% of the power output from the turbine. Changes in kinetic energy and potential energy can be neglected. For the ideal gas, use R = 0.287 kJ/kg.K and cp 1.11 kJ/kg.K. (c) i) Sketch the system/control volume for the above problem. Show the boundary/control surface and energy interactions clearly in the sketch. ii) Determine the mass flow rate of the ideal gas, kg's. i) Determine the temperature of the ideal gas leaving the turbine. "C. iv) Determine the pressure of the ideal gas leaving the turbine, APa. v) Suggest one way to increase the power output from the turbine.

(a) In thermodynamics, throttling valves and turbines can be analyzed as steady flow devices. Common assumptions in the analysis of these devices include adiabatic process and negligible changes in kinetic energy and potential energy. Describe one difference between the throttling valve and the turbine. (b) Air undergoes an adiabatic throttling process with negligible changes in kinetic energy and potential energy. If the temperature of the air remains constant during this process, does this process violates the first law of thermodynamies? Explain your answer. An ideal gas enters a turbine with a velocity of 40 m/'s through an inlet pipe with a diameter of 160 mm. The ideal gas enters the turbine at a temperature of 660'C and a pressure of 800 kPa. The idecal gas leaves the turbine with a velocity of 150 m/s through an outlet pipe with a diameter of 100 mm. The power output from the turbine is 350 kW. The heat lost from the turbine to the surrounding amounts to 6% of the power output from the turbine. Changes in kinetic energy and potential energy can be neglected. For the ideal gas, use R = 0.287 kJ/kg.K and cp 1.11 kJ/kg.K. (c) i) Sketch the system/control volume for the above problem. Show the boundary/control surface and energy interactions clearly in the sketch. ii) Determine the mass flow rate of the ideal gas, kg's. i) Determine the temperature of the ideal gas leaving the turbine. "C. iv) Determine the pressure of the ideal gas leaving the turbine, APa. v) Suggest one way to increase the power output from the turbine.

Elements Of Electromagnetics
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
See similar textbooks
icon
Related questions
Question
In thermodynamics, throttling valves and turbines can be analyzed as steady flow devices. Common assumptions in the analysis of these devices include adiabatic process and negligible changes in kinetic energy and potential energy. Describe one difference between the throttling valve and the turbine. Q2 (a) (b) Air undergoes an adiabatic throttling process with negligible changes in kinetic energy and potential energy. If the temperature of the air remains constant during this process, does this process violates the first law of thermodynamics? Explain your answer. An ideal gas enters a turbine with a velocity of 40 m/s through an inlet pipe with a diameter of 160 mm. The ideal gas enters the turbine at a temperature of 660°C and a pressure of 800 kPa. The ideal gas leaves the turbine with a velocity of 150 m/s through an outlet pipe with a diameter of 100 mm. The power output from the turbine is 350 kW. The heat lost from the turbine to the surrounding amounts to 6% of the power output from the turbine. Changes in kinetic energy and potential energy can be neglected. For the ideal gas, use R = 0.287 kJ/kg.K and cp 1.11 kJ/kg.K. (c) i) Sketch the system/control volume for the above problem. Show the boundary/control surface and energy interactions clearly in the sketch. ii) Determine the mass flow rate of the ideal gas, kg/s. iii) Determine the temperature of the ideal gas leaving the turbine. "C. iv) Determine the pressure of the ideal gas leaving the turbine, kPa. v) Suggest one way to increase the power output from the turbine.
Transcribed Image Text:In thermodynamics, throttling valves and turbines can be analyzed as steady flow devices. Common assumptions in the analysis of these devices include adiabatic process and negligible changes in kinetic energy and potential energy. Describe one difference between the throttling valve and the turbine. Q2 (a) (b) Air undergoes an adiabatic throttling process with negligible changes in kinetic energy and potential energy. If the temperature of the air remains constant during this process, does this process violates the first law of thermodynamics? Explain your answer. An ideal gas enters a turbine with a velocity of 40 m/s through an inlet pipe with a diameter of 160 mm. The ideal gas enters the turbine at a temperature of 660°C and a pressure of 800 kPa. The ideal gas leaves the turbine with a velocity of 150 m/s through an outlet pipe with a diameter of 100 mm. The power output from the turbine is 350 kW. The heat lost from the turbine to the surrounding amounts to 6% of the power output from the turbine. Changes in kinetic energy and potential energy can be neglected. For the ideal gas, use R = 0.287 kJ/kg.K and cp 1.11 kJ/kg.K. (c) i) Sketch the system/control volume for the above problem. Show the boundary/control surface and energy interactions clearly in the sketch. ii) Determine the mass flow rate of the ideal gas, kg/s. iii) Determine the temperature of the ideal gas leaving the turbine. "C. iv) Determine the pressure of the ideal gas leaving the turbine, kPa. v) Suggest one way to increase the power output from the turbine.
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 3 steps with 3 images

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Knowledge Booster
Properties of Pure Substances
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.
Similar questions
Recommended textbooks for you
Elements Of Electromagnetics
Elements Of Electromagnetics
Mechanical Engineering
ISBN:
9780190698614
Author:
Sadiku, Matthew N. O.
Publisher:
Oxford University Press
Mechanics of Materials (10th Edition)
Mechanics of Materials (10th Edition)
Mechanical Engineering
ISBN:
9780134319650
Author:
Russell C. Hibbeler
Publisher:
PEARSON
Thermodynamics: An Engineering Approach
Thermodynamics: An Engineering Approach
Mechanical Engineering
ISBN:
9781259822674
Author:
Yunus A. Cengel Dr., Michael A. Boles
Publisher:
McGraw-Hill Education
Control Systems Engineering
Control Systems Engineering
Mechanical Engineering
ISBN:
9781118170519
Author:
Norman S. Nise
Publisher:
WILEY
Mechanics of Materials (MindTap Course List)
Mechanics of Materials (MindTap Course List)
Mechanical Engineering
ISBN:
9781337093347
Author:
Barry J. Goodno, James M. Gere
Publisher:
Cengage Learning
Engineering Mechanics: Statics
Engineering Mechanics: Statics
Mechanical Engineering
ISBN:
9781118807330
Author:
James L. Meriam, L. G. Kraige, J. N. Bolton
Publisher:
WILEY
SEE MORE TEXTBOOKS