A cascade refrigeration system uses two vapor-compression refri... | Filo

Explain the difference between a cascade refrigeration and amultistage compression refrigeration system.

Consider a two-stage cascade refrigeration system operating between the pressure limits of 0.8 and 0.14 MPa. Each stage operates on the ideal vapor-compression refrigeration cycle with refrigerant-134a as the working fluid. Heat rejection from the lower cycle to the upper cycle takes place in an adiabatic counterflow heat exchanger where both streams enter at about 0.4 MPa. If the mass flow rate of the refrigerant through the upper cycle is 0.24 kg / s, determine (a) the mass flow rate of the re