The combined cycle plant shown in Fig. 9.36 uses a gas-turbine engine operating a Brayton cycle with

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The combined cycle plant shown in Fig. 9.36 uses a gas-turbine engine operating a Brayton cycle with air as the working fluid. The air enters the compressor at 102 kPa and 15 C and exits at 612 kPa. The maximum cycle temperature is 800 C and the air mass flow rate is 180 kg/s. The steam cycle operates in a simple Rankine cycle between 10 MPa and 70 kPa.A. Determine the net power output from the gas-turbine cycle.

B. Determine the maximum mass flow rate in the steam cycle. Use a counterflow heat exchanger between the gas-turbine cycle and the steam cycle.

Assume that the maximum temperature of the steam is the temperature of the exhaust gas from the gas turbine. Be sure to check that the temperature of the steam is never greater than the local temperature of the gas in the heat exchanger.

C. Determine the net power output from the steam cycle.

D. What is the thermal efficiency for the combined cycle? Compare this to the thermal efficiency for the gas-turbine cycle alone.

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Thermodynamics Concepts And Applications

ISBN: 9781107179714

2nd Edition

Authors: Stephen R. Turns, Laura L. Pauley

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Question Posted: May 13, 2023 04:51 AM

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Known Combined cycle with gasturbine engine and simple Rankine cycle Find Power output from each cycle and the thermal efficiency of cycle Schematic F...View the full answer

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