In: Mechanical Engineering
A refrigerator with a cooling capacity of 5 ton uses ammonia as
the working fluid. The condenser and evaporator maintain a pressure
of 1500 kPa and 200 kPa respectively. The compressor has an
isentropic efficiency of 80%. If the vapor leaving the evaporator
is superheated by 5°C and the liquid leaving the condenser is
supercooled by 5°C, determine:
a) The power input to the compressor
b) The mass flow rate of ammonia
c) The COP of the refrigerator