A gas-turbine (Brayton) cycle inlets 20 kg/s of atmospheric air at 15 C, compresses it to...

 

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A gas-turbine (Brayton) cycle inlets 20 kg/s of atmospheric air at 15 "C, compresses it to 1200 kPa, and heats it to 1200°C in a combustor. The gases leaving the turbine heat the steam of a Rankine cycle to 350 °C and exit the heat exchanger (boiler) at 100 °C. The pump of the Rankine cycle operates between 10 kPa and 6 MPa. You are asked for the following: a. Draw a sketch of the combined cycle; clearly state your assumptions and label important states. b. Prepare two T-s diagrams (one each for Brayton and Rankine) and clearly label states. c. Find heat input and net work delivered by the Brayton cycle. d. Find the mass flow rate of the Rankine cycle. e. Find the net work delivered by the Rankine cycle f. Calculate net work and net efficiency of the combined cycle. A gas-turbine (Brayton) cycle inlets 20 kg/s of atmospheric air at 15 "C, compresses it to 1200 kPa, and heats it to 1200°C in a combustor. The gases leaving the turbine heat the steam of a Rankine cycle to 350 °C and exit the heat exchanger (boiler) at 100 °C. The pump of the Rankine cycle operates between 10 kPa and 6 MPa. You are asked for the following: a. Draw a sketch of the combined cycle; clearly state your assumptions and label important states. b. Prepare two T-s diagrams (one each for Brayton and Rankine) and clearly label states. c. Find heat input and net work delivered by the Brayton cycle. d. Find the mass flow rate of the Rankine cycle. e. Find the net work delivered by the Rankine cycle f. Calculate net work and net efficiency of the combined cycle.