8. A coal fired steam boiler uses 3000 kg of coal per hour. Air required for combustion is 15.5 kg of coal at barometric pressure of 98.2 KPa. The flue gas has temperature of 285 degree Celsius and an average molecular weight of 30. Assuming an ash loss of 11% and allowable gas velocity of 7.5 meters per second. Find the diameter of the chimney
8. A coal fired steam boiler uses 3000 kg of coal per hour. Air required for combustion is 15.5 kg of
coal at barometric pressure of 98.2 KPa. The flue gas has temperature of 285 degree Celsius
and an average molecular weight of 30. Assuming an ash loss of 11% and allowable gas velocity
of 7.5 meters per second. Find the diameter of the chimney
9. The gas density is 0.75 kg per cubic meters and air density is of 1.15 kg per cubic meter. If the
driving pressure is 0.25 KPA. Determine the height of the chimney.
10. A powerplant situated at an altitude having an ambient air of 96.53 KPa and 23.88 degree
Celsius. Flue gases at a rate of 5.0 kg per second enter the stack at 200 degree Celsius and
leaves at 160 degree Celsius. The flue gases gravimetric analysis are 18% CO2, 7% O2 and 75%
N2. Calculate the height of the stack necessary for a driving pressure of 0.20 KPa
Kindly answer all please. Thank you
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