Evaluate the proportion of the heat of fuel carried away by theflue gases for the following data: Coal with Calorific Value of 30MJ/kg has composition by mass as follow: C= 78%, H=5%, 02,=8%,S=2%, N2=2% and the remaining is ash. The coal is burnt in thefurnace with 50% excess air. The flue gases leaving the chimney at327°C and the atmospheric temperature is at 15 °C. Assume perfectcombustion. Specific heat for dry product (Cp) is 1045J/kg. Heat iscarried away per kilogram of moisture in the flue gas is 3000kJ/kg.The composition of air by mass is as follow: 02 = 23% and N2= 77%.
