| Issue |
Korean Journal of Chemical Engineering,
Vol.17, No.6, 668-671, 2000
Vol.17, No.6, 668-671, 2000
High Pressure Vapor-liquid Equilibria and Critical Loci for the HFC125-HFC134a System
We measured vapor-liquid equilibria (VLE) ranging from 303.75 to 363.15 K and the critical locus for the system of pentafluoroethane (HFC125)-1,1,1,2-tetrafluoroethane (HFC134a). The critical locus exhibited type I behavior by van Konynenberg and Sccot Correlating the VLE data with an extended BWR equation of state, we found the optimum binary interaction parameter for this system 1.0081 and estimated coefficients of performance (C.O.P.) as a mixture refrigerant As a result of the correlation, we found that the HFC125-HFC134a system is a potential alternative refrigerant when mole fraction of HFC125 is lower than 0.6. Calculations showed a 4.9% saving energy in the cycle compared with chlorodifluoromethane (HCFC22), for a composition of 30 mole percent HFC125.
[References]
- Nishiumi H, Akita H, Akiyama S, Korean J. Chem. Eng., 14(5), 359, 1997
- Kobayashi M, Nishiumi H, Fluid Phase Equilib., 144(1-2), 191, 1998
- Tiller-Roth R, Li J, Yokozeki A, Sato H, Watanabe K, "Thermodynamic Properties of Pure and Blended Hydrofluorocarbon (HFC) Refrigerants," Japan Society of Refrigerating and Air Conditioning Engineers, Tokyo, 1998
- van Konynenburg PH, "Critical Lines and Phase Equilibria in Binary Mixtures," Ph.D. thesis, University of California, Los Angles, California, 1968
[Cited By]
참고문헌정보(참고문헌, 인용문헌)는 화학공학소재연구정보센터에 의해 제공되고 있습니다.