Reference Correlation for the Thermal Conductivity of n-Hexadecane from the Triple Point to 700 K and up to 50 MPa

Abstract

This paper presents a new wide-ranging correlation for the thermal conductivity of n-hexadecane based on critically evaluated experimental data. The correlation is designed to be used with a recently published equation of state, and it is valid from the triple point up to 700 K and pressures up to 50 MPa. We estimate the uncertainty at a 95% confidence level to be 4% over the aforementioned range, with the exception of the dilute-gas range where the uncertainty is 2.7% over the temperature range 583 to 654 K. The correlation behaves in a physically reasonable manner when extrapolated to the full range of the equation of state, but the uncertainties are larger outside of the validated range, and also in the critical region.

Diffusivities in Binary Mixtures of n-Decane, n-Hexadecane, n-Octacosane, 2-Methylpentane, 2,2-Dimethylbutane, Cyclohexane, Benzene, Ethanol, 1-Decanol, Ethyl Butanoate, or n-Hexanoic Acid with Dissolved He or Kr Close to Infinite Dilution

“…Solid lines are calculated at the thermodynamic state point of the respective DLS measurement with REFPROP software version 10.0 by the National Institute of Standards and Technology (NIST) . Equations of state, correlations, and data used in the REFPROP calculations are based on literature data. ,− REFPROP did not have correlations available for C 28 H 58 , C 10 H 22 O, eth-C 6 H 12 O 2 , or C 6 H 12 O 2 . For the latter two, no data for a or for c p within the relevant temperature range could be obtained from the literature.…”

Reference Correlations of the Viscosity and Thermal Conductivity of 1-Hexene from the Triple Point to High Temperatures and Pressures

“…In the case of the thermal conductivity, we also reported new reference correlations over extended temperature and pressure ranges, for some simple fluids (xenon [23], n-and p-hydrogen [24], water [25], deuterium oxide [26], carbon dioxide [27], ammonia [28], sulfur hexafluoride [29]), hydrocarbons (n-pentane, iso-pentane and cyclopentane [30], n-hexane [31], n-heptane [32], n-undecane [9], n-hexadecane [10], ethene and propene [33], benzene [34], toluene [35], o-, m-, and p-xylene, and ethylbenzene [36], cyclohexane [37]), alcohols (ethanol [38], ethane-1,2-diol [39]), and some refrigerants (R-1233zd(E) [40], R-161 [20], R-245fa [21], and RE-347mcc [41]).…”

“…The viscosity η can be expressed [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22] as the sum of four independent contributions, as where ρ is the molar density, T is the absolute temperature, and the first term, η 0 (Τ) = η(0,Τ), is the contribution to the viscosity in the dilute-gas limit, where only two-body molecular interactions occur. The linear-in-density term, η 1 (Τ) ρ, known as the initial density dependence term, can be separately established with the development of the Rainwater-Friend theory [43][44][45] for the transport properties of moderately dense gases.…”

“…In a series of papers published over the last ten years, we reported new reference correlations over extended temperature and pressure ranges, for the viscosity of some simple fluids (xenon [3], water, [4], deuterium oxide [5], ammonia [6]), hydrocarbons (n-hexane [7], n-heptane, [8], n-undecane [9], n-hexadecane [10], benzene [11], toluene [12], cyclopentane [13]), alcohols (methanol [14], ethanol [15], ethane-1,2-diol [16], propane-1,2-diol [17]) and some refrigerants (R-1234yf and R-1234ze(E) [18], R-134a [19], R-161 [20], R-245fa [21], and R-32 [22]).…”

Reference Correlation for the Thermal Conductivity of Ammonia from the Triple-Point Temperature to 680 K and Pressures up to 80 MPa

“…In a series of recent papers, new reference correlations for the thermal conductivity of some simple fluids, [1][2][3][4] hydrocarbons, [5][6][7][8][9][10][11][12][13] alcohols, 14 and refrigerants 15,16 were reported. In this paper, the methodology adopted in the aforementioned papers is extended to developing a new reference correlation for the thermal conductivity of ammonia.…”