Process 4-1: The wet vapor then enters a condenser where it is condensed at a constant pressure to become a saturated liquid.
In an ideal Rankine cycle the pump and turbine would be , i.e., the pump and turbine would generate no entropy and hence maximize the net work output. Processes 1-2 and 3-4 would be represented by vertical lines on the T-S diagram and more closely resemble that of the C