[Ans. 72.2. 54.43%; 84.1%] 9. The following particulars were recorded during a steam boiler trial: Pressure of steam 11 bar; Mass of feed water = 4600 kg/h; Temperature of feed water= 75° C ;Dryness...

Extracted text: [Ans. 72.2. 54.43%; 84.1%] 9. The following particulars were recorded during a steam boiler trial: Pressure of steam 11 bar; Mass of feed water = 4600 kg/h; Temperature of feed water= 75° C ;Dryness fraction of steam 0.96; Coal used = 490 kg/h: Calorific value of coal = 35 700 kJ/kg; Moisture in coal = 4% by mass; Mass of dry flue gases = 18.57 kg/kg of coal ; Temperature of flue gases = 300" C; Boiler house temperature 16" C; Spccific heat of flue gases 0.97 kJ/kg K. %3D %3D %3D %3D Draw the heat balance sheet of the boiler per kg of coal.