8.18 computer in the preliminary design of a power plant, water is chosen as the working fluid. it is determined that the turbine inlet temperature and pressure should be 560°c and 12,000 kpa, respectively. the quality of steam exiting the turbine should be at least 90%. if the isentropic turbine efficiency is 84%, determine the minimum condenser pressure allowable, in kpa.

An open feedwater heater operates at steady state with liquid entering at inlet 1 with t? = 40°c and pl = 1 .2 mpa. water vapor att2-200°c and p2 = 1.2 mpa enters at inlet 2. saturated liquid water exits with a pressure of pa 1.2 mpa. neglect heat transfer with the surroundings and all kinetic and potential energy effects, determine the mass flow rate of steam at inlet 2 if the mass flow rate of liquid water at inlet 1 is given as 2 kg/s.