What is the overall cycle second-law efficiency

Question

Problem

Find the exergy of the water at all four states in the Rankine cycle described in Problem 9.16. Assume that the high-temperature source is 500^oC and the low-temperature reservoir is at the ambient 25^oC. Determine the flow of exergy into or out of the reservoirs per kilogram of steam flowing in the cycle. What is the overall cycle second-law efficiency?

Problem 9.16

A utility runs a Rankine cycle with a water boiler at 3.0 MPa, and the cycle has the highest and lowest temperatures of 450^oC and 60^oC, respectively. Find the plant efficiency and the efficiency of a Carnot cycle with the same temperatures.

The response should include a reference list. Double-space, using Times New Roman 12 pnt font, one-inch margins, and APA style of writing and citations.