Authors

Thermal conductivity of liquid hydrofluorochloroderivatives of olefins. Correlations and a priori estimates

DOI: 10.17586/1606-4313-2021-20-3-75-80
UDC 561.22

Thermal conductivity of liquid hydrofluorochloroderivatives of olefins. Correlations and a priori estimates

Tsvetkov O.B. , Mitropov V.V., Laptev Yu.A.

For citation: Tsvetkov O.B., Mitropov V.V., Laptev Yu.A. Thermal conductivity of liquid hydrofluorochloroderivatives of olefins. Correlations and a priori estimates. Journal of International Academy of Refrigeration. 2021. No 3. p. 75-80. DOI: 10.17586/1606-4313-2021-20-3-75-80

Abstract
Hhydrofluoro- and hydrochlorofluoroolefins are characterized by the presence of a C=C double bond in the molecule and have an extremely low potential for global warming. Olefin hydrocarbons, one of the promising products of petrochemical industry for the synthesis of plastic, fibers, and synthetic lubricating oils, has found an increased application as refrigerants in cryogenics in the XXI century. The article concentrates on the heat-transfer coefficient as the most important characteristic of refrigerants, which depends heavily on the nature of thermal motion and is necessary for the calculation of heat exchange processes. Currently, an increasing demand of science and engineering for refrigerants exceeds the experimental data available. A combination of experimental approach and theoretical research is considered for heat conductivity of liquid hydrofluorochloroderivatives of olefins along saturation line. The correlations for a priori evaluations of heat conductivity, the parameters of which are drawn from empirical data available, are analyzed. The foundation of the analysis is the heat-transfer mechanism by hyperacoustic waves, which is supposed to be true for liquids. Conclusions are drawn regarding the comparison between measurements and calculated thermal conductivity.

Keywords: hydrofluorochloroolefins, thermal conductivity, liquid state, predictive methods

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