Vapor-phase Thermal Conductivity of Binary Mixtures of Cyclopentane and R134a with R365mfc

The thermal conductivity of mixtures of R365mfc (1,1,1,3,3pentafluorobutane), with R134a (1,1,1,2-tetrafluoroethane) and cyclopentane were measured using a transient hot-wire method, in the pressure range between 0.1013 and 0.7MPa and temperatures between 311 and 413K. The composition of the measured mixtures was 93.0% R365mfcþ 7.0% R134a (kg/ kg), 27.0% R365mfcþ 73.0% R134a (kg/kg) and 62.8% R365mfcþ 37.2% Cyclopentane (kg/kg). The Wassiljewa mixing rules modified by Mason and Saxena and the Extended Corresponding States Theory were used to correlate and to predict the experimental results obtained, with an average absolute deviation of 1.8 and 10%, respectively.