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///Chapter No 11 Steam Boilers
////Example 11.6 Page No 233
///Enthalpy of superheated steam
//Input data
clc;
clear;
ms=6000; //Boiler produce of steam Kg/h
P=25; //Boiler pressure in bar
Tsup=350; //Boiler temperature in degree celsius
Tw=40; //Feed water temperature indegree celsius
CV=42000; //Calorific value in Kj/Kg
etaboiler=75/100; //Expected thermal efficiency in %
//Calculation
hfw=167.45; //In KJ/Kg
Ts=223.94; //In degree celsius
hf=961.96; //In KJ/Kg
hfg=1839.0; //In KJ/Kg
hg=2800.9; //In KJ/Kg
Cps=2.3;
hs=((hg)+(Cps)*(Tsup-Ts)); //Enthalpy of superheated steam KJ/Kg
mf=((ms*(hs-hfw))/(CV*etaboiler)); //Boiler efficiency in %
me=ms/mf; //Equivalent mass of evaporation
E=((me*(hs-hfw))/2257); //Equivalent evaporation in Kg/Kg of oil
//Output
printf('Enthalpy of superheated steam=%f KJ/Kg \n',hs);
printf('Boiler efficiency=%f percent \n',mf);
printf('Equivalent mass of evaporation=%f \n',me);
printf('Equivalent evaporation=%fKg/Kg of oil \n' ,E);
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