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Unformatted text preview: After compression: Pr = 19.404; T = 673 °F; h = 274 Btu/lbm Actual Enthalpy = 290 Btu/lbm Combustor exit enthalpy = 577 Btu/lbm; Pr = 287 Turbine exhaust isentropic enthalpy = (Pr = 20.5) 276, T =1140 R Turbine Actual enthalpy = 306, T = 1260 R Efficiency = (271 – 161)/(287) = 0.38 2. With increase in inlet temperature, turbine side stays the same, new compressor side: Inlet temp = 380 °F , Pr = 6.573 h = 201.56 Btu/lbm After compression h = 426 Btu/lbm Actual enthalpy = 451 Btu/lbm New efficiency = (271 – 249)/126 = .17 3. Find temperatures going through heat exchanger: Hot in = 1260 R Hot out = 960 R Cold in = 80 °F = 540 R Cold out = 380 °F = 840 R Effectiveness = (840540)/(1260540) = 0.417...
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This note was uploaded on 02/08/2011 for the course ME 650:462 taught by Professor Muller during the Fall '10 term at Rutgers.
 Fall '10
 Muller

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