Measurement and Correlation of the Thermal Conductivity of 1,1,1,2,2,4,5,5,5-Nonafluoro-4-(trifluoromethyl)-3-pentanone

Abstract

New experimental data for the thermal conductivity of 1,1,1,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone (Novec 649) are reported for vapor, liquid and supercritical states. These new experimental data were obtained with transient hot-wire apparatus over the temperature range from 183 K to 501 K and at pressures from 0.02 MPa to 69 MPa. These data were used to develop a wide-range correlation for the thermal conductivity of the vapor, liquid and supercritical fluid. The experimental data reported here have an uncertainty of 1 % for the liquid and supercritical regions (densities > 600 kg m−3), 1.5 % for vapor and supercritical regions (pressures ≥ 1 MPa and densities < 200 kg m−3), 3 % for supercritical states (200 kg m−3 ≤ densities ≤ 600 kg m−3), and 3 % for vapor and supercritical states (pressures < 1 MPa). The thermal-conductivity correlation developed in this work is estimated to have an expanded relative uncertainty, at a 95 % confidence level, ranging from approximately 1 % to 4 % that depends upon the temperature and pressure, with larger uncertainties in the critical region.

The NIST REFPROP Database for Highly Accurate Properties of Industrially Important Fluids

“…where n, the number of terms in the summation, is six or less and the B coefficients are determined by regressing experimental data. Many of the formulations in REFPROP are of this type, for example in refs 65,69,81,112,166,194,198,200,206, and 231. The last term in eq 7, Δλ c , is used to represent the behavior in the critical region.…”

Thermal Diffusivity Measurement of Trans-1-chloro-3,3,3-trifluoropropene (R1233zd(E)) and Dodecafluoro-2-methylpentan-3-one (Novec1230) by the Dynamic Light Scattering Method

“…For R1233zd­(E), the average and maximum absolute deviations between our experimental results and the correlation based on eq were 0.75% and 2.11%. Figure also includes the calculated data from NIST REFPROP 10.0, in which thermal diffusivity was calculated by where λ is calculated by the correlation from the work of Perkins et al At the same time, ρ and c p were calculated by the equation of state of Mondejar et al The deviations between the data from NIST REFPROP 10.0 and our experimental results were within 3%. The thermal diffusivity was also reproduced using the measured heat capacity c p from Liu et al, ρ was also calculated by the equation of state of Mondejar et al, and λ was calculated by the correlation from the work of Perkins et al The maximum deviation between the recalculated results from our experimental data was increased to 6% at 343 K.…”

“…The huge deviation may be ascribed to the lack of experimental heat capacity data. For Novec1230, the calculated thermal diffusivity was only derived from the empirical equation. , …”

“…Table provides a brief literature review of the thermophysical properties of these two interesting fluids. The study of R1233zd (E) includes the vapor phase pvT , vapor pressure, − density, − ,, ideal gas heat capacity, speed of sound, thermal conductivity, , the liquid viscosity, , and surface tension. , Regarding Novec1230, only the vapor pressure, density, , speed of sound, thermal conductivity, saturated liquid dynamic viscosity, and heat capacity are available.…”

Measurement and Correlation of the Thermal Conductivity of cis-1,1,1,4,4,4-hexafluoro-2-butene

“…with coefficients B i,j given in Table 2, where p is the molar density and p c is the critical density. This functional form has been used successfully to represent the thermal conductivity of several promising new refrigerants such as (1,1,1,2,2,4,5,5,5-Nonafluoro-4-(trifluoromethyl)-3-pentanone, [22] R-1234yf, [23] R-1234ze(E), [23] and R-1233zd(E). [24] 4.3.…”