Thermal conductivity measurement and correlation at saturation condition of HFO refrigerant trans-1,1,1,4,4,4-hexafluoro-2-butene (R1336mzz(E))

Modeling Liquid Thermal Conductivity of Low-GWP Refrigerants Using Neural Networks

“…However, higher deviations can be seen at some specific temperatures. From an in-depth analysis of the results, it was found that this outcome could be due to the different temperature and pressure behaviors of the experimental point provided by the two sources [39,40] presenting λ L data for R1336mzz(E). However, the behavior of the entire network is very satisfactory, as can also be seen in Figure 4 where an excellent agreement of the computed points with respect to the experimental data is evident.…”

Entropy, Heat Capacity, and Thermal Conductivity of trans-1,1,1,4,4,4-Hexafluoro-2-butene [R1336mzz(E)] Derived from the Gaseous Sound Speed Measurement

“…Figure shows a relative difference between the calculated values of thermal conductivity for R1336mzz­(E) through eqs – and the reference data measured by Mondal et al The estimated uncertainties for the reference data are reported to be approximately 4 × 10 –2 at 0.95 level of confidence for both of the vapor and the liquid phases. The calculation of thermal conductivity for R1336mzz­(E) through eqs – reproduce the reference data with the mean absolute deviations of 2 mW m –1 K –1 or 9 × 10 –2 in the vapor phase and 13 mW m –1 K –1 or 17 × 10 –2 in the liquid phase.…”

“…The value of density, which is required for the calculation of eq 26 as well as that of eq 17, was calculated from the volume-translated Peng−Robinson equation of state proposed by Ghotbi et al, 19 that involves a parameter related to the dipole moment as follows. Figure 10 shows a relative difference between the calculated values of thermal conductivity for R1336mzz(E) through eqs 17−30 and the reference data measured by Mondal et al 9 The estimated uncertainties for the reference data are reported to be approximately 4 × 10 −2 at 0.95 level of confidence for both of the vapor and the liquid phases. The calculation of thermal conductivity for R1336mzz(E) through eqs 17−30 reproduce the reference data with the mean absolute deviations of 2 mW m −1 K −1 or 9 × 10 −2 in the vapor phase and 13 mW m −1 K −1 or 17 × 10 −2 in the liquid phase.…”

“…Relative deviations of the reference data of thermal conductivity for R1336mzz(E) measured by Mondal et al from the calculated values through eqs – in this study.…”

“…Kagawa and Matsuguchi have reported isobaric heat capacities in the gaseous phase in the temperature range from 308 to 363 K at the pressure up to 1 MPa, and determined the ideal gas heat capacities by extrapolating the isothermal data to zero pressure. Transport properties such as viscosity and thermal conductivity have been reported by Mondal et al. , The viscosities were measured by the capillary tube method in the temperature range from 314 to 394 K for the liquid, 391 to 453 K for the vapor, and 413 to 453 K for the supercritical region at the pressure up to 4 MPa. The thermal conductivities were measured by the transient hot-wire method in the temperature range from 313 to 393 K at the pressures up to 4 MPa for the liquid, 313 to 453 K at the pressures up to 2.5 MPa for the vapor, and 413 to 453 K at the pressures up to 4 MPa for the supercritical region.…”