An ammonia vapor-compression refrigerator has a single-stage, singleacting reciprocating compressor.

An ammonia vapor-compression refrigerator has a
single-stage, singleacting reciprocating compressor which has a bore of 127 mm,
a stroke of 152 mm, and a speed of 240 r.p.m. The pressure in the evaporator is
1.588 bar and that of the condenser is 13.89 bar. The volumetric efficiency of
the compressor is 80% and its mechanical efficiency is 90%. The vapor is dry
saturated on leaving the evaporator and the liquid leaves the condenser at 32
°C. Calculate the mass flow of refrigerant, the refrigerating effect, and the
power ideally required to drive the compressor.