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clc
clear
//DATA GIVEN
m=1.5; //mass of steam in cooker in kg
p1=5; //pressure of steam in bar
x1=1; //initial dryness fraction of steam
x2=0.6; //final dryness fraction of steam
//At 5 bar, from steam tables
Ts1=151.8+273; //in K
hf1=640.1; //kJ/kg
hfg1=2107.4; //kJ/kg
vg1=0.375; //m^3/kg
V1=m*vg1; //volume of pressure cooker in m^3
u1=(hf1+hfg1)-(p1*10^5)*(vg1*10^-3); //internal energy of steam per kg at initial point 1
//V1=V2
//V1=m*[(1-x2)*vf2+x2*vg2] //vf2 is negligible
vg2=V1/x2/1.5;
//from steam tables coreesponding to vg2=0.625 m^3/kg
p2=2.9;
Ts2=132.4+273; //in K
hf2=556.5; //kJ/kg
hfg2=2166.6; //kJ/kg
u2=(hf2+x2*hfg2)-(p2*10^5)*x2*(vg2*10^-3); //internal energy of steam per kg at final point 2
hnet=u2-u1; //heat transferred at constant volume per kg
Htotal=m*hnet; //total heat transferred
//-ve sign indicates that heat has been rejected
Hrej=-1*Htotal;
printf(' (i) The Pressure at new state is: %1.1f bar. \n',p2);
printf(' The Temperature at new state is: %3.1f deg. celsius or %3.1f K. \n',(Ts2-273),Ts2);
printf(' (ii) The Total heat to be REJECTED is: %4.2f kJ.',Hrej);
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