Homework Question 7:

4.68 Steam enters a turbine in a vapor power plant operating at steady state at 560°

C, 80 bar, and exits as a saturated vapor at 8 kPa. The turbine operates

adiabatically, and the power developed is 9.43 kW. The steam leaving the turbine

enters a condenser heat exchanger, where it is condensed to saturated liquid at 8

kPa through heat transfer to cooling water passing through the condenser as a

separate stream. The cooling water enters at 18°C and exits at 36°C with negligible

change in pressure. Ignoring kinetic and potential energy effects and stray heat

transfer at the outer surface of the condenser, determine the mass flow rate of

cooling water required, in kg/s.