a) Explanation Show the simple Brayton cycle, and with air as the working fluid on T − s diagram as in Figure (1). For the given Brayton cycle with air as the working fluid T i , and P i are the temperature at i t h state and pressure at i t h state respectively. Write the temperature and pressure relation ratio for the process 1-2. T 2 = T 1 ( P 2 P 1 ) ( k − 1 ) / k T 2 = T 1 ( r p ) ( k − 1 ) / k (I) Here, the specific heat ratio is k and pressure ratio is r p . Write the temperature and pressure relation ratio for the process 3-4. T 4 = T 3 ( P 4 P 3 ) ( k − 1 ) / k T 4 = T 3 ( 1 r p ) ( k − 1 ) / k (II) Write the expression of net specific work produced by the Brayton cycle ( w net ) . w net = w turbine − w compressor w net = c p ( T 3 − T 4 ) − c p ( T 2 − T 1 ) (III) Here, specific heat at constant pressure is c p b) To determine The net specific work produced by the Brayton cycle using variable specific heats.

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ISBN: 9780100257054

Author: CENGEL

Publisher: YUZU

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Chapter 9.12, Problem 155RP

To determine

The net specific work produced by the Brayton cycle using constant specific heats.

To determine

The net specific work produced by the Brayton cycle using variable specific heats.

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Chapter 9.12, Problem 154RP

Chapter 9.12, Problem 156RP

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