Q2// In a boiler trail of one hour duration the following observations wer kg, coal burnt = 695 kg, calorific value of coal = 30200 kJ/kg, dryness fra -0.94, pressure of the boiler= 15 bar, temperature of steam leaving the s of feed water = 80C. 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.
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Q2// 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 steam
-0.94, pressure of the boiler= 15 bar, temperature of steam leaving the super heater-400C, temperature
of feed water 80C. Calculate:
(a) Thermal efficiency of the boiler without super heater.
(b) Thermal efficiency of the boiler with super heater. Ans(58%:73%)
Transcribed Image Text:Q2// 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 steam -0.94, pressure of the boiler= 15 bar, temperature of steam leaving the super heater-400C, temperature of feed water 80C. Calculate: (a) Thermal efficiency of the boiler without super heater. (b) Thermal efficiency of the boiler with super heater. Ans(58%:73%)
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