The experiment is then performed, and the results can be saved, printed, or exported to Microsoft Excel for further use. This is accomplished by preparing a small sample of the liquid or paste, pouring it into the sample holder, and vertically inserting a sensor into place within the holder. Unlike the methods employed in the article, the THW-L2 can identify the thermal conductivity of a liquid or paste in a much simpler way. Figure 1 displays a plot of the measured thermal conductivities of the EG – water mixtures against the temperatures they were found at (Bohne, Fischer, & Obermeier, 1984).įigure 1: Thermal Conductivity of Ethylene Glycol-Water Mixtures After using the quadratic equations, the thermal conductivities were determined for the EG – water mixtures. Another equation was used to calculate the thermal conductivity of the mixtures from the values of the pure liquid thermal conductivities. These values were determined by obtaining the individual thermal conductivities of the pure liquids. The absolute method was utilized, and convection effects were avoided by having the concentric cylinders rotate about their horizontal axes. For this research, thermal conductivity was measured with a concentric cylinder device in the temperature range of -20☌ to 180☌, at saturation pressure. In the article Thermal Conductivity, Density, Viscosity, and Prandtl-Numbers of Ethylene Glycol-Water Mixtures (Bohne, Fischer, & Obermeier, 1984), the thermal conductivity, density, and viscosity of ethylene glycol (EG) – water mixtures were measured. Confidence in results can be expected, as the THW-L2 has an excellent repeatability, typically better than 2%, and high accuracy, typically better than 5%. This system follows the ASTM D7896 standard, an international standard for thermal conductivity measurements. Thermal Conductivity of Ethylene Glycol-Water MixturesĪt Thermtest, the Transient Hot Wire Liquid Thermal Conductivity Meter (commonly known as the THW-L2) is used as a measurement system for determining the thermal conductivity of liquids and pastes.
#NIST WEBOOK WATER COEFFICIENT OF THERMAL EXPANSION SERIES#
MP-1 with TPS In-plane and out-of-plane.TPS-EFF Medium sensor for medium sample volume.MP-1 with TPS Ability to measure small and large sample size.MP-2 Solids, Liquids, Pastes, Powders, Textiles, and Insulation.HFM-25 Insulation and Construction Materials.HFM-50 Insulation and Construction Materials.HFM-100 Insulation and Construction Materials.TLS-100 Soil, Small to Medium Particle Size.MP-1 with THW Small to Medium Particle Size.
MP-1 with TPS Small to Medium Particle Size.MP-1 with THW Liquids, Temperature & Pressure.MP-2 Concrete, Rock, Polymers, and Insulation.GHFM-02 Homogeneous, Heterogeneous, Metals & Composites.HFM-25 Homogeneous & Heterogeneous Insulation.GHFM-01 Heterogeneous, Metals & Composites.HFM-50 Homogeneous & Heterogeneous Insulation.HFM-100 Homogeneous & Heterogeneous Insulation.MP-1 with TPS Homogeneous & Heterogeneous, Insulation, Metals, Composites, Anisotropic & Thin-films.Guarded Heat Flow Meter, GHFM-01, GHFM-02.Transient Hot Wire, MP-1, THW-L1, THW-L2, MP-2.Thermal Conductivity / Thermal Diffusivity.Transient line Source, TLS-100, MP-2 Thermal Conductivity & Thermal Resistivity Thermal Conductivity & Thermal Resistivity.Guarded Heat Flow Meter, GHFM-01 & GHFM-02 Thermal Conductivity & Thermal Resistance Thermal Conductivity & Thermal Resistance.Heat Flow Meter, HFM-100, HFM-50 Thermal Conductivity & Thermal Resistance, HFM-25 Thermal Conductivity & Thermal Resistance Thermal Conductivity & Thermal Resistance.Transient Hot Wire, MP-1, THW-L1 & Thermal Conductivity, Thermal Diffusivity & Specific Heat THW-L2 Thermal Conductivity, Thermal Diffusivity & Specific Heat, MP-2 Thermal Conductivity, Thermal Diffusivity & Specific Heat Thermal Conductivity, Thermal Diffusivity & Specific Heat.
Transient Plane Source, MP-1, TPS-3 Thermal Conductivity, Thermal Diffusivity and Specific Heat Thermal Conductivity, Thermal Diffusivity and Specific Heat.
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