diff options
Diffstat (limited to '1943/CH11/EX11.8')
-rwxr-xr-x | 1943/CH11/EX11.8/Ex11_8.sce | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/1943/CH11/EX11.8/Ex11_8.sce b/1943/CH11/EX11.8/Ex11_8.sce new file mode 100755 index 000000000..3cfa76979 --- /dev/null +++ b/1943/CH11/EX11.8/Ex11_8.sce @@ -0,0 +1,43 @@ + +clc
+clear
+//Input data
+p1=1//Pressure in bar
+T1=20+273//Temperature in K
+Tm=900+273//Maximum temperature in K
+rp=6//Pressure ratio
+e=0.7//Effectiveness of regenerator
+ma=210//Rate of air flow in kg/s
+CV=40800//Calorific value in kJ/kg
+ic=0.82//Isentropic efficiencies of both the compressors
+it=0.92//Isentropic efficiencies of both the turbine
+cn=0.95//Combustion efficiency
+mn=0.96//Mechanical efficiency
+gn=0.95//Generator efficiency
+cp=1.005//Specific heat of air in kJ/kg.K
+cpg=1.08//Specific heat of gas in kJ/kg.K
+g1=1.4//Ratio of specific heats for air
+g=1.33//Ratio of specific heats for gas
+
+//Calculations
+pi=sqrt(p1*rp)//Intermediate pressure in bar
+T2sT1=(pi/p1)^((g1-1)/g1)//Temperature ratio
+T2s=(T2sT1*T1)//temperature in K
+T2=((T2s-T1)/ic)+T1//Temperature in K
+T4s=(T1*(rp/pi)^((g1-1)/g1))//Temperature in K
+T4=((T4s-T1)/ic)+T1//Temperature in K
+T7s=(Tm/(rp/p1)^((g-1)/g))//Temperature in K
+T7=Tm-(it*(Tm-T7s))//Temperature in K
+T5=(e*(T7-T4))+T4//Temperature in K
+mf=1/((cp*(Tm-T5))/((CV*cn)-(cp*(Tm-T5))))//Air fuel ratio
+Wgt=((1+(1/mf))*cpg*(Tm-T7))//Workdone by turbine in kJ/kg of air
+Wc=(cp*((T2-T1)+(T4-T1)))//Workdone by compressor in kJ/kg of air
+Wnet=(Wgt-Wc)//Net workdone in kJ/kg of air
+Q=(CV*cn)/mf//Heat supplied in kJ/kg of air
+ncy=(Wnet/Q)*100//Cycle efficiency in percent
+PO=(Wnet*ma*mn*gn)/10^3//Power output in MW
+Fc=(ma*3600*(1/mf))//Fuel consumption per hour in kg
+SFC=(Fc/(PO*10^3))//Specific fuel consumption in kg/kW.h
+
+//Output
+printf('(a) the air fuel ratio is %3.2f \n (b) the cycle efficiency is %3.1f percent \n (c) the power supplied by the plant is %3.0f MW \n (d) the specific fuel consumption of the plant is %3.3f kg/kW.h and the fuel consumption per hour is %3.2f kg',mf,ncy,PO,SFC,Fc)
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