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+//Chapter-2, Illustration 4, Page 58

+//Title: Gas Power Cycles

+//=============================================================================

+clc

+clear

+

+//INPUT DATA

+rv=9.5;//Compression ratio

+P1=100;//Air pressure in kPa

+T1=290;//Air temperature in K

+V1=600*(10^-6);//Volume of air in m^3

+T4=800;//Final temperature in K

+R=287;//Universal gas constan in J/kg.K

+Cv=0.718;//Specific heat at constant volume in kJ/kg.K

+y=1.4;//Ratio of specific heats

+

+//CALCULATIONS

+T3=T4*(rv^(y-1));//Temperature at the end of constant volume heat addition in K

+P2=P1*(rv^y);//Pressure at point 2 in kPa

+T2=T1*(rv^(y-1));//Temperature at point 2 in K

+P3=P2*(T3/T2);//Pressure at point 3 in kPa

+m=(P1*1000*V1)/(R*T1);//Specific mass in kg/s

+Q=m*Cv*(T3-T2);//Heat transferred in kJ

+n=(1-(1/rv^(y-1)))*100;//Thermal efficiency

+Wnet=(n*Q)/100;//Net workdone in kJ

+MEP=Wnet/(V1*(1-(1/rv)));//Mean effective pressure in kPa

+

+//OUTPUT

+mprintf('Maximum pressure of the cycle is %3.2f kPa \n Maximum temperature of the cycle is %3.1f K \n Amount of heat transferred is %3.2f kJ \n Thermal efficiency is %3.1f percent \n Mean effective pressure is %3.1f kPa',P3,T3,Q,n,MEP)

+

+

+

+

+

+

+

+//==============================END OF PROGRAM=================================