a) Explanation Draw the T − s diagram regenerative gas turbine as shown in Figure (1). Write the expression to calculate the pressure ratio for the regenerative gas turbine ( r p ) . r p = P 2 / P 1 . (I) Here, pressure at state 1 is P 1 and pressure at state 2 is P 2 . Write the temperature and pressure relation ratio for the expansion process 3-4 s . T 4 s = T 3 ( 1 r p ) ( k − 1 ) / k . (II) Here, temperature at state 3 is T 3 and isentropic temperature at state 4 s is T 4 s . Write the expression to calculate the efficiency of the turbine ( η T ) . η T = c p ( T 3 − T 4 ) c p ( T 3 − T 4 s ) T 4 = T 3 − η T ( T 3 − T 4 s ) (III) Here, temperature at state 4 is T 4 . Write the expression to calculate the heat added due to regeneration ( q regen ) . q regen = ε × c p ( T 4 − T 2 ) . (IV) Here, the specific heat at constant pressure is c p , the effectiveness of the regenerator is ε and temperature at state 2 is T 2 . Conclusion: From Table A-17, “Ideal-gas specific heats of various common gases”, obtain the following properties of air at room temperature. c p = 1.005 kJ / kg k = 1.4 Substitute 900 kPa for P 2 and 100 kPa for P 1 in Equation (I). r p = 900 kPa / 100 kPa = 9 Substitute 1400 K for T 3 , 9 for r p and 1 b) To determine The thermal efficiency of the turbine.

9th Edition

ISBN: 8220106796979

Author: CENGEL

Publisher: YUZU

See similar textbooks

Concept explainers

IC engines

The term "engine" indicates a mechanical device/machine used to convert input energy to a specific mechanical output. The input energy may be in the form of chemical energy, thermal energy, or so on and mechanical output is in the form of mechanical ener…

Question

Chapter 9.12, Problem 115P

To determine

The amount of heat transfer in the regenerator.

To determine

The thermal efficiency of the turbine.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Chapter 9.12, Problem 114P

Chapter 9.12, Problem 116P

Students have asked these similar questions

An Ericsson cycle operates on 0.75 lb of oxygen from 60 psia and 1200°F at the beginning of isothermal process to the lower temperature limit of 200°F. If the isothermal expansion ratio is 3, determine QA, QR, Wnet, e, and mean effective pressure.Please provide clear, detailed solution. Thanks

Solve it correctly and handwritten answer please.

(1) A four-cylinder engine has a compression ratio of 8, and cach cylinder has a maximum volume of 0.6 L. At the beginning of the compression process, the air is at 98 kPa and 17°C, and the maximum temperature in the cycle is 1800 K., dctermine (a) the amount of heat supplied per cylinder. (b) the thermal efficiency, and (c) the number of revolutions per minute rcquired for a net power output of 60 kW. Study the effect of varying the compression ratio from 5 to 11 on the network done and the efficiency of the cycle. Plot the P-v and T-s diagrams for the cycle, and discuss the results.

Chapter 9 Solutions

EBK THERMODYNAMICS: AN ENGINEERING APPR

Ch. 9.12 - What are the air-standard assumptions?Ch. 9.12 - What is the difference between air-standard...Ch. 9.12 - Prob. 3P Ch. 9.12 - How does the thermal efficiency of an ideal cycle,...Ch. 9.12 - How are the combustion and exhaust processes...Ch. 9.12 - What does the area enclosed by the cycle represent...Ch. 9.12 - Prob. 7P Ch. 9.12 - Can the mean effective pressure of an automobile...Ch. 9.12 - What is the difference between spark-ignition and...Ch. 9.12 - Prob. 10P

Knowledge Booster

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.

The amount of heat transfer in the regenerator.

Solution Summary: The author explains the amount of heat transfer in the regenerator and the expression to calculate the pressure ratio for the regenerative gas turbine.

Concept explainers

The amount of heat transfer in the regenerator.

The thermal efficiency of the turbine.

Want to see the full answer?

Chapter 9 Solutions