A cylinder/piston contains air at ambient conditions, 100 kPa and 20C with a volume of 0.3 m3. The air is compressed to 800 kPa in a reversible polytropic process with exponent, n 1.2, after which it is expanded back to 100 kPa in a reversible adiabatic process.
a. Show the two processes in P–v and T–s diagrams.
b. Determine the final temperature and the net work.
c. What is the potential refrigeration capacity (in kilojoules) of the air at the final state?