The gas-turbine portion of a combined gas-steam power plant (Figure 1) has a pressure ratio of 15. Air enters the compressor at 300 K and 1 atm at a rate of 12 kg/s and is heated to 1500 K in the combustion chamber. The combustion gases leaving the gas turbine are used to heat the steam to 400 °C at 10 MPa in a heat exchanger. The combustion gases leave the heat exchanger at 420 K. The steam leaving the turbine is condensed at 15 kPa. Assume all the compression and expansion processes to be isentropic. Figure 1 of 1 410 Gas turbine +₁ Compressor Combustion chamber C Gas cycle. Air in HX Exhaust gases Steam cycle +10 Steam turbine Pamp Condenser
Part A Determine the mass flow rate (m) of steam. Express your answer to three significant figures. VO ΑΣΦ | Η vec kg/ Submit Request Answer h Part B Determine the net power output (Wnet)- Express your answer to three significant figures and include the approp HA ? Value Units www PARY ?
Part C Determine the thermal efficiency of the combined cycle. Express your answer to three significant figures. HOPP vec [VD] ΑΣΦ $1 % Submit Request Answer Part D What-if scenario: What would the thermal efficiency be if the compression ratio increased to 17? Express your answer to three significant figures. 15. ΑΣΦ V ΑΣΦ | Π vec ? ▼ ? %
The gas-turbine portion of a combined gas-steam power plant (Figure 1) has a pressure ratio of 15. Air enters the compre
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The gas-turbine portion of a combined gas-steam power plant (Figure 1) has a pressure ratio of 15. Air enters the compre
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