A steady-state operation system is consisting of a compressor and a heat exchanger. The supply work for the compressor is obtained from the expression of saturated liquid water at 200°C which then isothermally evaporated to a saturated vapor. Initially, Refrigerant-134a flows from the compressor at 1 MPa with a temperature of 70℃ and flows into the heat exchanger at 35°C with a mass flow rate of 6 kg/min. Additionally, a separate cooling stream of cooling water also flows at 300 kPa into the heat exchanger at 15℃ and leave at 25℃.