Superheated steam at 40 bar absolute and 500°C flows at a rate of 250 kg/mm to an adiabatic turbine, where it expands to 5bar. The turbine develops 1500kW. From the turbine the steam flows to a heater, where it is reheated isobarically to its initial temperature. Neglect kinetic energy changes.

(a) Write an energy balance on the turbine and use it to determine the outlet stream temperature.

(b) Write art energy balance on the heater and use it to determine the required input (kW) to the steam.

(c) Verify that an overall energy balance on the two-unit process is satisfied.

(d) Suppose the turbine inlet and outlet pipes both have diameters of 0.5 meter. Show that it is reasonable to neglect the change in kinetic energy for this unit.