initial commit / add all books

1 files changed, 33 insertions, 0 deletions

diff --git a/2705/CH8/EX8.11/Ex8_11.sce b/2705/CH8/EX8.11/Ex8_11.sce
new file mode 100755
index 000000000..f9ee92977
--- /dev/null
+++ b/2705/CH8/EX8.11/Ex8_11.sce
@@ -0,0 +1,33 @@
+clear;

+clc;

+disp('Example 8.11');

+

+// aim : To determine

+//  the energy carried away by the dry flue gas/kg of fuel burned

+

+// given values

+C = .78;//  mass composition of carbon

+H2 = .06;// mass composition of hydrogen

+O2 = .09;// mass composition of oxygen

+Ash = .07;// mass composition of ash

+Ea = .50;//  excess air for combustion

+aO2 = .23;// mass composition of O2 in air 

+Tb = 273+20;// boiler house temperature, [K]

+Tf = 273+320;// flue gas temperature, [K]

+c = 1.006;// specific heat capacity of dry flue gas, [kJ/kg K]

+

+// solution

+// for one kg of fuel

+sO2 = (8/3*C+8*H2);// stoichiometric O2 required, [kg/kg fuel]

+sO2a = sO2-O2;// stoichiometric O2 required from air, [kg/kg fuel]

+sair = sO2a/aO2;// stoichiometric air required, [kg/kg fuel]

+ma = sair*(1+Ea);// actual air supplied/kg of fuel, [kg]

+// total mass of flue gas/kg fuel is

+mf = ma+1;// [kg]

+mH2 = 9*H2;//H2 produced, [kg] 

+// hence, mass of dry flue gas/kg coall is

+m = mf-mH2;// [kg]

+Q = m*c*(Tf-Tb);// energy carried away by flue gas, [kJ]

+mprintf('\n The energy carried away by the dry flue gas/kg is  =  %f kg\n',Q);

+

+//  End