Water flows through a horizontal coil heated from the outside by high-temperature flue gases. As it passes through the coil the water changes stale from liquid at 200 kPa and 80oC to vapor at 100 kPa and 125oC, Its entering velocity is 3 m s-1 and its exit velocity is 200 ms-1. Determine the heat transferred through the coil per unit mass of water. Enthalpies of the inlet and outlet streams are:
Inlet: 334.9 kJ kg-1; Outlet 2.726.5 kJ kg-1