Thermal conductivity of liquid n-alkanes
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 less than or equal to T/T/sub c/ less than or equal to 0.7 and 2.4 less than or equal to rho/rho/sub c/ less than or equal to 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.
- Research Organization:
- Instituto Superior Tecnico, Lisboa (Portugal)
- OSTI ID:
- 6160863
- Journal Information:
- Int. J. Thermophys.; (United States), Journal Name: Int. J. Thermophys.; (United States) Vol. 9:3; ISSN IJTHD
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400201* -- Chemical & Physicochemical Properties
ACCURACY
ALKANES
BUTANE
CORRELATIONS
DENSITY
ETHANE
FLUIDS
FORECASTING
HARD-SPHERE MODEL
HEPTANE
HEXANE
HOT-WIRE GAGES
HYDROCARBONS
ISOTHERMS
LIQUIDS
LOW TEMPERATURE
MEASURING INSTRUMENTS
MEDIUM PRESSURE
MEDIUM TEMPERATURE
METHANE
ORGANIC COMPOUNDS
PENTANE
PHYSICAL PROPERTIES
PRESSURE DEPENDENCE
PRESSURE GAGES
PRESSURE MEASUREMENT
PROPANE
TEMPERATURE DEPENDENCE
TEMPERATURE MEASUREMENT
THERMAL CONDUCTIVITY
THERMODYNAMIC PROPERTIES
VAN DER WAALS FORCES