Reconsider the previous problem and find the second-law efficiency if we do consider the “value” of the exhaust flow.'

Data from previous problem 

A Brayton cycle has a compression ratio of 15:1 with a high temperature of 1600 K and an inlet state of 290 K, 100 kPa. Use cold air properties to find the specific net work output and the second law efficiency if we neglect the “value” of the exhaust flow.