A cylinder/piston contains air at ambient conditions, 14.7 lbf/in 2 and 70 F with a volume of 10 ft3. The air is compressed to 100 lbf/in 2 in a reversible polytropic process with exponent, n 1.2, after which it is expanded back to 14.7 lbf/in 2 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 British thermal units) of the air at the final state?