Q6//(14 Marks) In a boiler trail of one hour duration the following observations were made: Steam generated =5250 kg, coal burnt = 695 kg, calorific value of coal 30200 kJ/kg, dryness fraction of %3D steam =0.94, pressure of the boiler = 15 bar, temperature of steam leaving the super heater =400°C, temperature of feed water = 80°C. Calculate: (a) Thermal efficiency of the boiler without super heater. (b) Thermal efficiency of the boiler with super heater. Ans(58%;73%)

Q6//(14 Marks) In a boiler trail of one hour duration the following observations were made: Steam generated =5250 kg, coal burnt = 695 kg, calorific value of coal 30200 kJ/kg, dryness fraction of %3D steam =0.94, pressure of the boiler = 15 bar, temperature of steam leaving the super heater =400°C, temperature of feed water = 80°C. Calculate: (a) Thermal efficiency of the boiler without super heater. (b) Thermal efficiency of the boiler with super heater. Ans(58%;73%)

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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