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+///Chapter No 11 Steam Boilers
+////Example 11.14 Page No 245
+///Find Theoretical draught in millimeters of water
+//Input data
+clc;
+clear;
+H=24;            //Chimney height in m
+Ta=25+273;       //Ambient temperature in degree celsius
+Tg=300+273;      //Temperature of fuel gases in degree celsius
+ma=20;           //Combustion space of fuel burnt in Kg/Kgof fuel
+g=9.81; 
+
+
+//Calculation
+hw=((353*H)*((1/Ta)-((1/Tg)*((ma+1)/ma))));//Theoretical draught in millimeters of water in mm
+H1=H*((Tg/Ta)*(ma/(ma+1))-1);              //Theoretical draught produced in hot gas column in m
+H2=H1-9.975;                               //Draught lost in friction at the grate and passage in m
+V=round(sqrt(2*g*H2));                       //Actual draught produced in hot gas column in m
+
+///Output
+printf('Theoretical draught in millimeters of water= %f mm \n',hw);
+printf('Theoretical draught produced in hot gas column=%f m \n',H1);
+printf('Draught lost in friction at the grate and passage=%f m \n',H2);
+printf('Actual draught produced in hot gas column= %f m \n ',V);