A refrigerator is operating on the Bell-Coleman cycle between the limits of 100 kPa and 100 kPa. Air is drawn from the cold chamber at 7 ◦ C, compressed and then it is cooled to 27 ◦ C before entering...

A refrigerator is operating on the Bell-Coleman cycle between the limits of 100 kPa and

100 kPa. Air is drawn from the cold chamber at 7
^◦C, compressed and then it is cooled

to 27
^◦C before entering the expansion cylinder. Expansion and compression follow

the law, pV
¹.³
= C. Calculate the theoretical COP of the system. Take γ = 1.4 and

cp = 1.003 kJ/kg K for air.