With an aid of Helmholtz function in combination with new mixing rules based on our PVTx measurements, the thermodynamic state-surface for a refrigerant mixture of the R 12+R 22 system was described in the range of 240≤T≤420 K, P≤9 MPa and ρ≤900 kg/m3. Using T-s diagrams for several compositions illustrated, the coefficient of performance for the standard refrigeration cycle using the present binary mixture system as refrigerant was calculated. Analysis of the coefficient of performance was explained by the composition dependence of cycle performance was explained by the composition dependence of the thermodynamic state-surface of the present system.
JSME International Journal Series C Mechanical Systems, Machine Elements and Manufacturing
JSME International Journal Series B Fluids and Thermal Engineering
JSME International Journal Series A Solid Mechanics and Material Engineering
JSME international journal. Ser. C, Dynamics, control, robotics, design and manufacturing
JSME international journal. Ser. 3, Vibration, control engineering, engineering for industry
JSME international journal. Ser. A, Mechanics and material engineering
JSME international journal. Ser. 1, Solid mechanics, strength of materials