Question

1500kg of steam is to be produced per hour with an enthalpy of 3077kj/kg. The feed water supplied to the boiler has an enthalpy of 167.5 kj/kg. The velocities of the water at inlet and the steam at exist are 2m/s and 45m/s respectively. Find the rate of which heat must be supplied to the boiler.

Answer 1

$uS_1=\frac{2v_1v_2}{v_1+v_2}S_2,$

$u=20.8~\frac ms.$