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+// Exa 5.4
+clc;
+clear;
+close;
+// Given data
+CalorificValue= 14.887*10^3;// in kJ/m^3
+Vs= 1;// in m^3 (assumed)
+Vc= 0.25*Vs;// clearance volume in m^3
+V= Vs+Vc;// in m^3
+Ratio= V/Vc;// ratio of compression
+Gamma= 1.4;
+r= 5;
+Eta=1-1/(r^(Gamma-1)) ;
+Eta= Eta*100;// in %
+disp(Eta,"Air standard efficiency in % is :")
+Eta_Th= Eta*60/100;// thermal efficiency
+disp(Eta_Th,"Thermal efficiency in % is : ")
+Eta_br_th= Eta_Th*75/100;// break thermal efficiency
+disp(Eta_br_th,"Brake thermal efficiency in % is :")
+E= 3600;// energy equivalent of brake in kJ
+GasConsumption= E/CalorificValue;// in m^3
+disp(GasConsumption,"The consumption of gas in m^3 is :")