Evaluate the proportion of the heat of fuel carried away by the flue gases for the...
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Mechanical Engineering
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%, 0,=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) is1045J/kg. Heat is carried away per kilogram of moisture in the fluegas is 3000kJ/kg. The composition of air by mass is as follow:02 = 23% and N2= 77 %.
(20 marks, C5)
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%, 0,=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) is1045J/kg. Heat is carried away per kilogram of moisture in the fluegas is 3000kJ/kg. The composition of air by mass is as follow:02 = 23% and N2= 77 %.
(20 marks, C5)
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