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diff --git a/3821/CH11/EX11.9/Example11_9.sce b/3821/CH11/EX11.9/Example11_9.sce new file mode 100644 index 000000000..3f1142bae --- /dev/null +++ b/3821/CH11/EX11.9/Example11_9.sce @@ -0,0 +1,34 @@ +///Chapter No 11 Steam Boilers
+////Example 11.9 Page No 237
+///Find Mass of steam consumption
+///Input data
+clc;
+clear;
+P=15; //Boiler produces steam in bar
+Tsup=250; //Boiler temperature in degree celsius
+Tw=35; //Feed water in degree celsius
+MWh=1.5; //steam supplied to the turbine
+CV=32000; //Coal of calorific value in KJ/Kg
+etaboiler=80/100; //Thermal efficiency in %
+fr=210; //Firing rate in Kg/m^2/h
+//From steam table(temp basis at 35 degree celsius)
+hfw=146.56; //In KJ/Kg
+Ts=198.29; //In degree celsius
+hfg=1945.2; //In KJ/Kg
+hg=2789.9; //In KJ/Kg
+Cps=2.3;
+
+
+//calculator
+hs=hg+Cps*(Tsup-Ts); //Enthalpy of superheated steam(with superheater) in KJ/Kg
+ms=9000/MWh; //Steam rate in Kg/MWh
+mf=((ms*(hs-hfw))/(etaboiler*CV)); //Mass of steam consumption in Kg/h
+GA=mf/fr; //Grate rate in m^2
+
+
+
+//Output
+printf('Enthalpy of superheated steam(with superheater)=%f KJ/Kg \n',hs);
+printf('Steam rate= %f Kg/h \n',ms);
+printf('Mass of steam consumption=%f Kg/h \n',mf);
+printf('Grate rate=%f m^2 \n',GA);
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