1. A steam turbine inlet is at 1200 kPa, 500?C. The actual exit is at 300 kPa, with actual work of 407 kJ/kg. What is its second-law efficiency?
2. Find the second-law efficiency for the compressor in Problem 8.21.
Problem 8.21
An air compressor takes air in at the state of the surroundings, 100 kPa, 300 K. The air exits at 400 kPa, 200?C using 100 kW of power. Determine the minimum compressor work input.