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.