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  • Thermal conductivity of compacted fill with mine

    2015-12-1 · The thermal conductivity of the compacted mine tailings and tire crumbs mixtures shows to be slightly anisotropic: the horizontal thermal conductivities are higher than the vertical thermal conductivities with a difference less than 15%. The anisotropy ratio η of thermal conductivity can be expressed as (3) η = λ h λ v

  • Thermal conductivity of mine backfill Spectrum

    The research was focused primarily on investigating and obtaining a range values for thermal conductivity of different mine backfills, as well as the effect of some of the associated physical parameters. More than 800 samples and 2000 measurements were done on different backfills with different physical properties.

  • Thermal Conductivity of Compacted Mixtures of Mine

    2013-1-25 · ABSTRACT: The thermal conductivity of compacted mine tailings and tire crumbs mixtures is studied as affected by the water content, mixing ratio of tailings and tire crumbs, compactive effort and size of tire crumbs. The results show a clear correlation between the thermal

  • (PDF) The nomogram establishment of thermal

    The law of the mixing amount of insulation material on thermal conductivity and strength was discovered through testing 75 specimens of insulating concrete used for mine.

  • Experimental Measurements of the Thermal

    2000-11-15 · This paper describes an experimental study that examines the influence of sintering and microstructure on ash deposit thermal conductivity. The measurements are made using a technique developed to make in situ, time-resolved measurements of the effective thermal conductivity of ash deposits formed under conditions that closely replicate those found in the convective pass of a

  • Rapid Evaluation of Rock Thermal Parameters at the Lucky

    2020-11-4 · of tests conducted at Hecla Mining Company's Lucky Friday Mine. These tests include in-situ measurements of rock thermal conductivity and geothermal gradient, which were performed in highly active sections of this deep silver mine. The results from the in-situ tests are compared with data obtained from laboratory testing of mine core samples.

  • (PDF) Thermal properties of mangoes ResearchGate

    Thermal conductivity, specific heat, and density were measured in a temperature range of 30C to 80C, and moisture content of 4.6% to 6.5% for radish seeds, 5.0% to 7.3% for

  • Mechanical properties and thermal conductivities of

    2019-7-1 · 1. Introduction. Thermal barrier coatings (TBCs) have been extensively applied on the metallic hot sections of high temperature gas turbines or jet engines to increase their efficiency, in terms of higher operating temperatures [1,2].The most universally used TBCs material is 6–8 wt% yttria stabilized zirconia (YSZ), which possess many excellent properties such as low conductivity, high

  • Thermal characterization of phase change materials for

    2020-11-4 · conductivity was increased by about 97.7%, the specific heat capacity was increased by 52% for solid phase and 64% for liquid phase, the thermal diffusivity increased by 42% for solid phase and 54% for liquid phase.

  • Thermal Metamaterials University of Notre Dame

    2018-5-23 · Thermal diodes. Thermal diode concept using two coupled nonlinear one-dimensional lattices. • If T L"<"T R: vibrations in material B concentrate at low frequencies, but in material A they concentrate at high frequencies. The frequencies do not match, so heat cannot flow efficiently from right to left (reverse direction). • If T L">"T

  • Thermal conductivity of mine backfill Spectrum

    The research was focused primarily on investigating and obtaining a range values for thermal conductivity of different mine backfills, as well as the effect of some of the associated physical parameters. More than 800 samples and 2000 measurements were done on different backfills with different physical properties.

  • Thermal Conductivity of Compacted Mixtures of Mine

    2013-1-25 · ABSTRACT: The thermal conductivity of compacted mine tailings and tire crumbs mixtures is studied as affected by the water content, mixing ratio of tailings and tire crumbs, compactive effort and size of tire crumbs. The results show a clear correlation between the thermal

  • Thermal conductivity of Meadowbank’s mine waste rocks

    2018-9-5 · unfrozen / frozen thermal conductivity as a function of saturation for a non-potentially acid-generating waste rock unit, a potentially acid-generating waste rock unit, and tailings from Meadowbank mine. A predictive thermal conductivity model was calibrated to best represent the data obtained in the laboratory. Because no

  • [PDF] The nomogram establishment of thermal

    The insulating concrete can be effectively reduced heat exchange between surrounding rock and ventilation air, which is of positive significance to mine cooling and energy conservation. The law of the mixing amount of insulation material on thermal conductivity and strength was discovered through testing 75 specimens of insulating concrete used for mine.

  • Experimental Measurements of the Thermal

    2000-11-15 · This paper describes a technique developed to make in situ, time-resolved measurements of the effective thermal conductivity of ash deposits formed under conditions that closely replicate those found in the convective pass of a commercial boiler. Since ash deposit thermal conductivity is thought to be strongly dependent on deposit microstructure, the technique is designed to minimize the

  • Rapid Evaluation of Rock Thermal Parameters at the Lucky

    2020-11-4 · of tests conducted at Hecla Mining Company's Lucky Friday Mine. These tests include in-situ measurements of rock thermal conductivity and geothermal gradient, which were performed in highly active sections of this deep silver mine. The results from the in-situ tests are compared with data obtained from laboratory testing of mine core samples.

  • (PDF) Thermal properties of mangoes ResearchGate

    Thermal conductivity, specific heat, and density were measured in a temperature range of 30C to 80C, and moisture content of 4.6% to 6.5% for radish seeds, 5.0% to 7.3% for alfalfa seeds typically

  • Thermal characterization of phase change materials for

    2020-11-4 · conductivity was increased by about 97.7%, the specific heat capacity was increased by 52% for solid phase and 64% for liquid phase, the thermal diffusivity increased by 42% for solid phase and 54% for liquid phase.

  • Influence of Fluid Concentration on Freezing Point

    2018-11-9 · Effective Thermal Conductivity The system used to measure thermal conductivity is a coaxial dual-cylinder apparatus and is schematically shown in Fig. 2. This method was originally presented by Bellet et al.[15] and was already used by Telis-Romero et al.[2,16] for measuring thermal conductivity of orange juice above the freezing point.

  • Thermal Metamaterials University of Notre Dame

    2018-5-23 · Thermal diodes. Thermal diode concept using two coupled nonlinear one-dimensional lattices. • If T L"<"T R: vibrations in material B concentrate at low frequencies, but in material A they concentrate at high frequencies. The frequencies do not match, so heat cannot flow efficiently from right to left (reverse direction). • If T L">"T

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