Refrigerant 134a enters a compressor operating at steady state as saturated vapor at 0.12 MPa and exits at 1.2 MPa and 76.96C at a mass flow rate of 0.168 kg/s. As the refrigerant passes through the compressor, heat transfer to the surroundings occurs at a rate of 0.52 kJ/s. Determine at steady state the power input to the compressor, in kW.