A boiler produces (2000 mathrm{~kg}) of dry saturated steam per hour at 10 bar. The feed water
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A boiler produces \(2000 \mathrm{~kg}\) of dry saturated steam per hour at 10 bar. The feed water temperature \(=110^{\circ} \mathrm{C} .225 \mathrm{~kg}\) of coal having calorific value of \(30,000 \mathrm{~kJ} / \mathrm{kg}\) are fired per hour. If \(10 \%\) of coal remains unburnt, Calculate
(a) The thermal efficiency of boiler.
(b) The thermal efficiency of boiler and grate combined.
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