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A boiler generates 7.5 kg of steam per kg of coal burnt

at a pressure of 11 bar, from feed water having a temperature of 70ÂșC. The efficiency of the boiler is 75 % and factor of evaporation is 1.15, specific heat of steam at constant pressure is 2.3 KJ/Kg. /K.

Calculate:

i. Degree of superheat and temperature of steam generated;

ii. Calorific value of coal in Kj/Kg;

iii. Equivalent evaporation in Kg of steam per Kg of coal.


Subject : Thermal and Fluid Power Engineering

Topic : Steam Generator

Difficulty : High

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