Explanation Show the ideal Brayton cycle with regeneration, and with air as the working fluid on T − s diagram. For the given Brayton cycle with regeneration and with air as the working fluid T i , P i , and h i are the temperature at i t h state, pressure at i t h state, and specific enthalpy at i t h state, respectively. Write the expression of the temperature and pressure relation for the isentropic process 1-2. T 2 = T 1 r p ( k − 1 ) / k (I) Here, pressure ratio is r p and specific heat ratio is k . Write the expression of temperature and pressure relation for the isentropic process 3-4. T 4 = T 3 ( 1 r p ) ( k − 1 ) / k (II) Write the expression of thermal efficiency of the cycle ( η th ) . η th = 1 − q out q in η th = 1 − c p ( T 6 − T 1 ) c p ( T 3 − T 5 ) η th = 1 − ( T 6 − T 1 ) ( T 3 − T 5 ) (III) Here, heat input to the cycle is q in , heat rejected by the cycle is q out and specific heat at constant pressure is c p . Write the expression of net work output of the cycle ( w net ) . w net = η th q in w net = η th ( h 3 − h 5 ) w net = η th c p ( T 3 − T 5 ) (IV) Conclusion: Substitute 300 K for T 1 , 1

8th Edition

ISBN: 9780073398174

Author: Yunus A. Cengel Dr., Michael A. Boles

Publisher: McGraw-Hill Education

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Chapter 9.12, Problem 106P

To determine

The net work output of an ideal Brayton cycle with regeneration and the thermal efficiency of the ideal Brayton cycle with regeneration.

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Chapter 9.12, Problem 104P

Chapter 9.12, Problem 107P

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Chapter 9 Solutions

Thermodynamics: An Engineering Approach

Ch. 9.12 - What are the air-standard assumptions?Ch. 9.12 - What is the difference between air-standard...Ch. 9.12 - How does the thermal efficiency of an ideal cycle,...Ch. 9.12 - What does the area enclosed by the cycle represent...Ch. 9.12 - Prob. 5P Ch. 9.12 - Prob. 6P Ch. 9.12 - Can the mean effective pressure of an automobile...Ch. 9.12 - Prob. 8P Ch. 9.12 - What is the difference between spark-ignition and...Ch. 9.12 - Prob. 10P

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