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+clear ;

+clc;

+// Example 6.10

+printf('Example 6.10\n\n');

+printf('Page No. 158\n\n');

+

+// given

+//for Boiler-1

+P_1 = 15;// Boiler pressure in bar

+Ts_1 = 300;// Steam temperature in degree celcius

+Tf_1 = 80;// Feed water temperature in degree celcius

+X_1 = 0;// Steam dryness fraction

+m_s1 = 9000;// steam rate in kg/h

+m_f1 = 700;// Gas rate in kg/h

+G_CV1 = 43.0*10^6;// In J/kg

+//from steam table,at P = 15 bar and at given temperatures

+h2_1 = 3039*10^3;//Specific enthalpy of steam in J/kg

+h1_1 = 335*10^3;//Specific enthalpy of feed steam in J/kg

+

+E_G1 = ((m_s1*(h2_1-h1_1)*100)/(m_f1*G_CV1));//

+printf('The gross efficiency  percentage is %.0f \n',E_G1)

+Ee_1 = ((m_s1/m_f1)*(h2_1-h1_1))/(2257*10^3);

+printf('the  equivalent evaporation for boiler-1 is %3.1f kg \n\n',Ee_1)

+

+//for Boiler-2

+P_2 = 10;// Boiler pressure in bar

+Ts_2 = 180;// Steam temperature in degree celcius

+Tf_2 = 60;// Feed water temperature in degree celcius

+X_2 = 0.96;// Steam dryness fraction

+m_s2 = 7000;// steam rate in kg/h

+m_f2 = 510;// Gas rate in kg/h

+G_CV2 = 43.0*10^6;// In J/kg

+//from steam table,AT 10 bar and at temperature T = Ts_2

+h2 = (763+(X_2*2013))*10^3;//Specific enthalpy of steam in J/kg

+//At temperature T = Tf_2

+h1 = 251*10^3;//Specific enthalpy of feed steam in J/kg

+

+E_G2 = ((m_s2*(h2-h1)*100)/(m_f2*G_CV2));//

+printf('The gross efficiency  percentage is %.0f\n',E_G2)

+Ee_2 = ((m_s2/m_f2)*(h2-h1))/(2257*10^3);

+printf('the  equivalent evaporation for boiler-2 is %3.1f kg',Ee_2)

+

+

+

+

+