In a boiler trial observations made are as: Feed water temperature (=30^{circ} mathrm{C}) Boiler pressure (quad=12 mathrm{bar})

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In a boiler trial observations made are as:

Feed water temperature \(=30^{\circ} \mathrm{C}\)

Boiler pressure \(\quad=12 \mathrm{bar}\)

Dryness fraction of steam \(=0.80\)

Coal consumption \(\quad=400 \mathrm{~kg} / \mathrm{h}\)

Feed water supplied \(\quad=3,000 \mathrm{~kg} / \mathrm{h}\)

Calorific value of coal \(\quad=38,000 \mathrm{~kJ} / \mathrm{kg}\)

Calculate the evaporation factor and equivalent evaporation at \(100^{\circ} \mathrm{C}\) in \(\mathrm{kg} / \mathrm{kg}\) of coal. Specific heat of feed water \(=4.18 \mathrm{~kJ} / \mathrm{kgK}\).

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