In: Mechanical Engineering
Q/ A vapor-compression refrigeration cycle working with R22
contains a liquid-to-suction
heat exchanger. The saturated liquid refrigerant at 40 °C leaving
the condenser and entering
the heat exchanger is used to superheat the saturated vapor
refrigerant leaving the evaporator
at 7 °C by 8 °C. If the compressor is capable of pumping 5 l/s of
vapor refrigerant measured
at the inlet to the compressor and the compression processes are
considered isentropic in
both cases listed below, determine;
(a) The refrigerating capacity in kW, the compressor power in kW,
and the COP of the
system in the absence of the heat exchanger.
(b) The refrigerating capacity in tons refrigeration, the
compressor horsepower, and the
COP of the system in the presence of the heat exchanger.?