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Jun 2013

Volume 42, Issue 2 (partial)

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Reference Correlation of the Thermal Conductivity of n-Heptane from the Triple Point to 600 K and up to 250 MPa

M. J. Assael, I. Bogdanou, S. K. Mylona, M. L. Huber, R. A. Perkins, and V. Vesovic

J. Phys. Chem. Ref. Data 42, 023101 (2013); http://dx.doi.org/10.1063/1.4794091 (9 pages)

Online Publication Date: 1 April 2013

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This paper contains new, representative reference equations for the thermal conductivity of n-heptane. The equations are based in part upon a body of experimental data that have been critically assessed for internal consistency and for agreement with theory whenever possible. In the case of the dilute-gas thermal conductivity, a theoretically based correlation was adopted in order to extend the temperature range of the experimental data. Moreover, in the critical region, the experimentally observed enhancement of the thermal conductivity is well represented by theoretically based equations containing just one adjustable parameter. The correlations are applicable for the temperature range from the triple point to 600 K and pressures up to 250 MPa. The overall uncertainty (considered to be estimates of a combined expanded uncertainty with a coverage factor of 2) of the proposed correlation is estimated, for pressures less than 250 MPa and temperatures less than 600 K, to be less than 4%.
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51.20.+d Viscosity, diffusion, and thermal conductivity
05.70.Jk Critical point phenomena

Reference Correlation of the Thermal Conductivity of Ethanol from the Triple Point to 600 K and up to 245 MPa

M. J. Assael, E. A. Sykioti, M. L. Huber, and R. A. Perkins

J. Phys. Chem. Ref. Data 42, 023102 (2013); http://dx.doi.org/10.1063/1.4797368 (10 pages)

Online Publication Date: 26 April 2013

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This paper contains new, representative reference equations for the thermal conductivity of ethanol. The equations are based in part upon a body of experimental data that have been critically assessed for internal consistency and for agreement with theory whenever possible. In the case of the dilute-gas thermal conductivity, a theoretically based correlation was adopted in order to extend the temperature range of the experimental data. Moreover, in the critical region, the experimentally observed enhancement of the thermal conductivity is well represented by theoretically based equations containing just one adjustable parameter. The correlations are applicable for the temperature range from the triple point to 600 K and pressures up to 245 MPa. The overall uncertainty (at the 95% confidence level) of the proposed correlation is estimated to be less than 4.6%.
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66.25.+g Thermal conduction in nonmetallic liquids
05.70.Ce Thermodynamic functions and equations of state
05.70.Jk Critical point phenomena
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