Consider the power plant in Problem 9.41. Assume that the high temperature source is a flow of liquid water at 120◦C into a heat exchanger at constant pressure, 300 kPa and that the water leaves at 90◦C. Assume that the condenser rejects heat to the ambient, which is at −20◦C. List all the places that have entropy generation and find the entropy generated
in the boiler heat exchanger per kilogram of ammonia flowing.

Data from Problem 9.41

A power plant for a polar expedition uses ammonia and the boiler exit is 80◦C, 1000 kPa, and the condenser operates at −15◦C. A single open FWH operates at 400 kPa with an exit state of saturated liquid. Find the mass fraction extracted in the turbine.