An engineer has proposed that a simple ideal Rankine cycle that uses refrigerant-134a be used to produce work with heat from a low-temperature thermal energy reservoir. The boiler operates at 1.6 MPa, the condenser at 0.5 MPa, and the turbine inlet at 80 ºC.
(a) Draw a schematic of the ideal Rankine cycle and the corresponding T-s diagram.
(b) Determine the R-134a mass flow rate needed for this cycle to produce 750 kW of power.
(c) Determine the thermal efficiency of the cycle.