Critical parameters of alternative refrigerants and their mixtures

摘要

Values nf tin taitieul parameters fur five refrigerants (HFC-32, HFC-125, HFC-134a, HFC'-I-Ha, iiml IJl-C-lWitl weie estimated from all available experimental information by a new method. The criiical parameters tot binary refrigerant mixtures HFC-32/HFC-125 and HFC-125/ HFC-l'Oa were meanmed by visual ttbwt vaiion of the meniscus disappearance and reappearance. The uncertainties of the critical temperature, critical pressure, and critical density were estimated lo he within 20mK, 8kPa, and 6 kg m-3 respectively.