Consider a combined gas-steam power cycle. The topping
Chapter 10, Problem 84P(choose chapter or problem)
10-84 Consider a combined gas-steam power cycle. The topping cycle is a simple Brayton cycle that has a pressure ratio of 7 . Air enters the compressor at \(15^{\circ} \mathrm{C}\) at a rate of \(40 \mathrm{~kg} / \mathrm{s} 950^{\circ} \mathrm{C}\) and the gas turbine at . The bottoming cycle is a reheat Rankine cycle between the pressure limits of
and
. Steam is heated in a heat exchanger at a rate of
by the exhaust gases leaving the gas turbine, and the exhaust gases leave the heat exchanger at \(200^{\circ} \mathrm{C}\). Steam leaves the high-pressure turbine at
and is reheated to \(400^{\circ} \mathrm{C}\) in the heat exchanger before it expands in the low-pressure turbine. Assuming 80 percent isentropic efficiency for all pumps and turbines, determine
the moisture content at the exit of the low-pressure turbine,
the steam temperature at the inlet of the high-pressure turbine,
the net power output and the thermal efficiency of the combined plant.
Equation Transcription:
Text Transcription:
15°C
40 kg/s 950°C
200°C
400°C
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