Please solve the problem using EES. Submit your EES code together with your printed results.
Also, draw the T-S diagram of the regenerative vapor power cycle.
60 Consider a regenerative vapor power cycle with two
feedwater heaters, a closed one and an open one, as shown
in Fig. P8.60. Steam enters the first turbine stage at 12 MPa,
480°C, and expands to 2 MPa. Some steam is extracted at
2 MPa and fed to the closed feedwater heater. The remainder
expands through the second-stage turbine to 0.3 MPa, where
an additional amount is extracted and fed into the open
feedwater heater operating at 0.3 MPa. The steam expanding
through the third stage turbine exits at the condenser pressure
of 6 kPa.
Feedwater leaves the closed heater at 210°C, 12 MPa,
and condensate exiting as saturated liquid at 2 MPa is trapped
into the open feedwater heater. Saturated liquid at 0.3 MPa
leaves the open feedwater heater. Assume all pumps and
turbine stages operate isentropically. Determine for the cycle
(a) the heat transfer to the working fluid passing through
the steam generator, in kJ per kg of steam entering the first-
stage turbine.
(b) the thermal efficiency.
(c) the heat transfer from the working fluid passing through
the condenser to the cooling water, in kJ per kg of steam
entering the first-stage turbine.
