For this problem you may use the attached steam chart, the tables in your text or an appropriate steam table app. In a thermal Power plant the high pressure turbine is supplied with steam at 78 bar and 480 C which is expanded to a pressure of 17 bar. It is then reheated to 425C and expanded to 0.07 bar in a low-pressure turbine.

a. Please draw a T-S and a flow diagram of the process (see the class notes).

b. What is the thermal efficiency of the heat engine if it acts as an ideal Rankine cycle with reheat?

c. How does the efficiency computed in part (a) compare with that of a Rankine heat engine where the steam expands from 78 bar and 480 C to 0.07 bar without reheat and a low pressure turbine?

d. Recalculate part (a) if the efficiency of each turbine is 0.85

e. What do you think would happen if we added more reheat cycles as the pressure is reduced from 78 bar to 0.07 bar?