Question: In a boiler trial, the following data is available : Calculate (a) equivalent evaporation from and at (100^{circ} mathrm{C}), and (b) boiler efficiency. Take (c_{p

In a boiler trial, the following data is available :

Coal consumed in 24 hours Mass of water evaporated Steam pressure Temperature

Calculate

(a) equivalent evaporation from and at $100^{\circ} \mathrm{C}$, and

(b) boiler efficiency.

Take $c_{p w}=4.187 \mathrm{~kJ} / \mathrm{kg} . \mathrm{K}$.

Coal consumed in 24 hours Mass of water evaporated Steam pressure Temperature of feed water Calorific value of fuel Dryness fraction of steam = 1300 kg = 13000 kg = 5 bar = 40C = 30 MJ/kg = 0.95

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