initial commit / add all books

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+clc;

+p1=12.5; // Pressure of steam at inlet in MPa

+T1=500; // Temperature of steam at inlet in degree celcius

+V1=50; // Velocity of steam at inlet in m/s

+p2=10; // Pressure of steam at outlet in kPa

+V2=100; // Velocity of steam at outlet in m/s

+// (a).Actual expansion

+x2=0.85; // Quality of steam

+// From steam table

+h1=3341.8; hf2=191.83; hg2=2584.7;  // specific enthalpy in kJ/kg 

+s1=6.4618; sf2=0.6493; sfg2=7.5009; // specific entropy in kJ/kg K

+h2a=(1-x2)*hf2+x2*hg2; // specific enthalpy in kJ/kg 

+wa=(h1-h2a)+((V1^2-V2^2)/2000); // Actual work output

+disp ("kJ",wa,"(a).Actual work output of turbine = ");

+// (b).Reversible adiabatic expansion

+x2s=(s1-sf2)/sfg2; // Quality of steam after reversible adiabatic expansion

+h2s=(1-x2s)*hf2+x2s*hg2; // specific enthalpy in kJ/kg 

+ws=(h1-h2s)+((V1^2-V2^2)/2000); // Reversible adiabatic work output

+L=ws-wa; // Lost of work

+disp ("kJ/kg",L,"Lost of work due to irreversibity of expansion process =","kJ/kg",ws,"Reversible adiabatic work output = ","(b).Reversible adiabatic expansion");

+// (c).Entropy Generation

+s2a=sf2+x2*sfg2; // actual specific entropy in kJ/kg K

+Sgen=s2a-s1; // Entropy generation

+disp ("kJ/kg K",Sgen,"(c).Entropy Generation =");