Thermal Conductivity of Liquid Hydrofluorochlorine Olefins in the Range from Saturation Line to Criterial Pressure

A method is proposed for predicting the thermal conductivity of liquid hydrofluoroolefins (HFOs) and hydrochlorofluoroolefins (HCFOs), which belong to the fourth generation of refrigerants, in the range of state parameters from the saturation line to the critical pressure ( p cr ) and from the triple point of temperature ( T tr ) to the critical temperature ( T cr ). Within the framework of the methodology, two correlation dependences are proposed approved using the example of describing the thermal conductivity of eight liquid HFO and HCFO refrigerants in the temperature range from T tr to T cr . One of the correlations is based on the correlations of S. Yang et al., within the framework of which we took into account the requirements of the dynamic scale theory of the critical point, with the other being developed on the basis of the criterion unit of L. P. Filippov. It is shown that both correlations with low uncertainty describe data on the thermal conductivity of liquid HFO and HCFO refrigerants both on the saturation line and in the single-phase region. It is also shown that within the limits of experimental uncertainty, the modernized correlation of S. Yang et al. describes experimental data on the thermal conductivity of propane in the vicinity of the critical point. Based on the proposed method, tabulated data on the thermal conductivity of liquid refrigerant R1234ye(E) in the temperature range from 203.15 to 375.15 K were obtained for the first time.