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Unformatted text preview: 9-54EquationsGas Turbine SystemAir enters the compressor of a gas turbien at P1=100 kPa, T1=300 K. The isentropic efficiencies of the compressor andturbine are specified to be 90%, 80% and 70%. The temperature at the turbine inlet is 1400 K. The volumetric flow rate atthe compressor inlete is 5 m3/sThe power developed is 5e6 Btu/hr. Calculate and plota) the thermal efficiencyb) the back work ratioc) the net power developedversys pressure ratio for ratios between 2 and 20Refer to states as shown inEESDiagramWindow$ifnot ParametricTablePressureRatio= 10(1)$endifknown informationP1= 100 [kPa](2)T1= 300 [K](3)T3= 1400 [K](4)˙V= 5m3/svolumetric flow at inlet(5)h1= h (Air,T=T1)inlet state(6)s1= s (AIr,T=T1,P=P1)(7)P2=PressureRatio·P1neglect pressure losses(8)s2id=s1ideal compressor is isentropic(9)h2id= h (Air,s=s2id,P=P2)(10)ηc=h2id-h1(h2-h1)definition of isentropic efficiency(11)T2= T (Air,h=h2)(12)wc=h1-h2(13)Effectiveness= 0.8(14)Effectiveness=hx-h2h4-h2(15)Tx= T (Air,h=hx)(16)q23=h3-...
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This note was uploaded on 07/29/2008 for the course ME 361 taught by Professor Martin during the Spring '07 term at Wisconsin.
- Spring '07