An economizer is used in the refrigeration cycle shown below. HFC-134a is to be the refrigerant. For the desired application, the condenser outlet is saturated at 30C the evaporator outlet is saturated at -30C. In this problem you will determine the cooling capacity of the evaporator and the corresponding heat load of the condenser for this cycle using a P-H diagram. Assume that the economizer operates at 0.3 MPa. Also assume that both compressors are reversible. The flow through the evaporator is 180 kg/h. Use a straight edge against the computer screen to read values, or print the figure for part (a) for markup and use it during subsequent parts.

k) Assuming that the second compressor is adiabatic and reversible, locate Stream 5.