Measurements of the Thermal Conductivity of n-Pentane, Isopentane, 1-Pentene, and 1-Pentanol in the Temperature Range from 253 to 373 K at Pressures up to 30 MPa

Abstract

In this work, thermal conductivities of a homologous series of liquids n-pentane, isopentane, 1-pentene, and 1-pentanol were measured from 253 to 373 K at pressures up to 30 MPa with a transient hot-wire apparatus. The relative expanded uncertainty of the reported data was estimated to be 2.0% with a confidence level of 0.95 (k = 2). The polynomial thermal conductivity model was used to correlate the experimental values for each of the fluids. The average absolute percentage deviations of the experimental results from fitting were 0.3, 0.3, 0.3, and 0.1%. Comparisons were provided between the data obtained in this work and published literature.

High-Pressure Thermal Conductivity Measurements of a (Methane + Propane) Mixture with a Transient Hot-Wire Apparatus

“…The THW technique is an absolute and commonly used (Perkins et al 1,2 , Assael et al 3,4 , Wu et al 5,6 , etc) technique for measuring the thermal conductivity of fluids. An early example of its use was by Stalhane and Pyk 7 in 1931 who measured the thermal conductivity of solids and powders.…”

“…The THW technique is an absolute and commonly used (Perkins et al. , Assael et al, , Wu et al, , etc.) technique for measuring the thermal conductivity of fluids.…”

Measurement of Thermal Diffusivity of n-Pentane from (293–573) K and up to 10.0 MPa in the Near-Critical and Supercritical Regions

“…The thermal conductivity model used in REFPROP 9.1 proposed by Vassiliou et al is the best model for n -pentane. Most of the data in Table are used in their model, except the data of Wang et al and Le Neindre et al because Wang’s and Le Neindre’s work appeared after the development of the correlation. The model can be expressed as where ρ is the density, T is the temperature, λ 0 ( T ) is the contribution to the thermal conductivity in the dilute gas limit, Δλ­(ρ, T ) is the residual thermal conductivity, and Δλ c (ρ, T ) is the critical enhancement of the thermal conductivity.…”

“…Many research studies have been focused on the thermal conductivity measurement of n-pentane. Wang et al 4 carried out the thermal conductivity measurement of n-pentane at T = (253−373) K and pressures up to 30 MPa with a transient hot-wire apparatus. Le Neindre et al 5 measured the thermal conductivity of n-pentane at T = (300−467) K and pressure between 0.1 and 53 MPa by a coaxial cylinder method.…”

Measurement of the Thermal Conductivities of Toluene, Cyclohexane, and Diethyl Ether at Pressures up to 15.1 MPa and Their Binary Mixtures at Pressures 0.1 and 10.1 MPa from 291 to 351 K

“…The theory of the apparatus and measurement can be found in previous works including our work. − In short, the instrument contains two thin 25 μm diameter tantalum hot wires with lengths 29.9 and 59.8 mm. The whole structure was sealed in a stainless steel pressure vessel with a pressure-controlled advection pump (2PB-2020IV) maximum designed pressure up to 15.1 MPa.…”