BIBLIOS

Document type
Journal articles

Document subtype
Full paper

Title
Thermal conductivity of liquid n-alkanes

Participants in the publication
J. C. G. Calado (Author)
INSTITUTO SUPERIOR TÉCNICO
J. M. N. A. Fareleira (Author)
INSTITUTO SUPERIOR TÉCNICO
U. V. Mardolcar (Author)
INSTITUTO SUPERIOR TÉCNICO
C. A. Nieto de Castro (Author)
Dep. Química e Bioquímica
CQE

Summary
The thermal conductivity of liquids has been shown in the past to be difficult to predict with a reasonable accuracy, due to the lack of accurate experimental data and reliable prediction schemes. However, data of a high accuracy, and covering wide density ranges, obtained recently in laboratories in Boulder, Lisbon, and London with the transient hot-wire technique, can be used to revise an existing correlation scheme and to develop a new universal predictive technique for the thermal conductivity of liquid normal alkanes. The proposed correlation scheme is constructed on a theoretically based treatment of the van der Waals model of a liquid, which permits the prediction of the density dependence and the thermal conductivity of liquid n-alkanes, methane to tridecane, for temperatures between 110 and 370 K and pressures up to 0.6 MPa, i.e., for 0.3?T/T c?0.7 and 2.4?P/P c?3.7, with an accuracy of ±1%, given a known value of the thermal conductivity of the fluid at the desired temperature. A generalization of the hard-core volumes obtained, as a function of the number of carbon atoms, showed that it was possible to predict the thermal conductivity of pentane to tetradecane±2%, without the necessity of available experimental measurements.


Institution
INSTITUTO SUPERIOR TÉCNICO

Where published
International Journal of Thermophysics

Publication Identifiers

Publisher
Springer Science and Business Media LLC



Document Identifiers
DOI - https://doi.org/10.1007/bf00513076
URL - http://dx.doi.org/10.1007/bf00513076

Keywords
Correlation n-alkanes thermal conductivity

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