Validating the results from MATLAB/Simulink with EES results [2] on efficiencies and net work outputs. The working fluid is fixed as Acetone. The evaporator’s pressure varies between 5, 10, 15 and 20 bar. The expander’s temperature lies between 200 – 280˚C. And the mass flow rate of the heat source is at 0.28287 kg/s.