A Bell-Coleman refrigeration system is used to produce 10 tons of refrigeration. The cooler and refrigerator pressure are 4.2 bars and 1.4 bars. Air is cooled in the cooler to 450 C and temperature of air at the inlet of the compressor is -200C. For an ideal cycle, calculate COP, mass of air circulated/min, theoretical piston displacement of compressor and power required per ton of refrigeration. Assume Cp for air as 1.005 kJ/kg-K. Find the cylinder dimensions if the compressor is single-acting single-Cylinder with L/D ratio of 1.2 and runs at 600 r.p.m.