[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 incoal = 4% by mass; Mass of dry flue gases = 18.57 kg/kg of coal ; Temperature of flue gases = 300" C; Boilerhouse temperature 16" C; Spccific heat of flue gases 0.97 kJ/kg K.%3D%3D%3D%3DDraw the heat balance sheet of the boiler per kg of coal.

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9. The following particulars were recorded during a steam boiler trial : Pressure of steam = 11 bar; Mass of feed water = 4600kg/h; Temperature of feed water 7Sº C ;Dryness fraction of steam 0.96; Coal used = 490 kg/h: Calorific value of coal = 35 700 KJK ; 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 Draw the heat balance sheet of the boiler per kg of coal.

9. The following particulars were recorded during a steam boiler trial : Pressure of steam = 11 bar; Mass of feed water = 4600kg/h; Temperature of feed water 7Sº C ;Dryness fraction of steam 0.96; Coal used = 490 kg/h: Calorific value of coal = 35 700 KJK ; 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 Draw the heat balance sheet of the boiler per kg of coal.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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