A turbine (Figure 5-7) has an efficiency of 80% and an outlet pressure of P = 0.5 bar. The inlet stream is at T = 300°C, and can be either a saturated steam or a superheated steam at either P = 3 bar, 5 bar, 10 bar, or 30 bar.

A. Which of these inlet streams provides the most work without exceeding a maximum allowable liquid fraction of 10% in the steam exiting the turbine?

B. What is the efficiency of a Rankine heat engine operating using this turbine, with the inlet stream chosen in part A?