Two-stage refrigeration cycle: a two-stage compression refrigeration system with an adiabatic liquid-vapor separation unit uses refrigerant-134a as the working fluid. the system operates the evaporator at -40oc, the condenser at 800 kpa, and the separator at - 10.1oc. the system is to serve a 30-kw cooling load ( ql ). determine a) the mass flow rate through each of the two compressors, b) the power used by the compressors, and c) the system’s cop. the refrigerant is saturated liquid at the inlet of each expansion valve and saturated vapor at the inlet of each compressor, and the compressors are isentropic.