Towards accurate measurements of specific heat of solids by drop calorimetry up to 3000 °C

Razouk, Refat; Beaumont, Olivier; Hameury, Jacques; Hay, Bruno

doi:10.1016/j.tsep.2021.101130

Cited by 4 publications

(1 citation statement)

References 14 publications

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“…Specific heat capacity c p and conductivity λ changes with temperature [16,17]. The changes in a limited heating range of less than 50 K at temperatures between 0 • C and 150 • C tend to be lower than the uncertainty of most methods.…”

Section: Temperature Dependence Of Thermophysical Propertiesmentioning

confidence: 99%

Thermophysical Property Measurements with the Finite Bar

Ellenrieder,

Kaufmann,

Reick

et al. 2023

Applied Sciences

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Knowledge of thermophysical properties of materials is important in the design process to meet the ambitious targets with respect to reliability and performance of many modern machinery. In this paper a simple method for the measurements of thermophysical material properties is presented. A bar of the sample material is heated at one end by a constant heat source and temperature sensors on or in the sample material at different locations record the temperature response. In the limit of small Fourier-Numbers the temperature will not rise at the adiabatic end and the comparison to the theoretical curve allows to extract thermophysical data. In the case of large Fourier-Numbers a quasi steady temperature profile in the bar allows to extract all relevant thermophysical properties simultaneously. Apart from the theory some measurement results are presented and the errors due to diabatic boundary conditions are discussed.

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Section: Temperature Dependence Of Thermophysical Propertiesmentioning

confidence: 99%

Thermophysical Property Measurements with the Finite Bar

Ellenrieder,

Kaufmann,

Reick

et al. 2023

Applied Sciences

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Uncertainty Quantification in Modeling Mold Heat Transfer in Steel Continuous Slab Casting with CON1D

Wells,

Thomas

2024

steel research int.

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Computational models are powerful tools to quantify physical phenomena to gain valuable insights into a manufacturing process. Their accuracy is hindered, however, by uncertainty in the input data. Furthermore, when calibrating models with plant measurements, it helps to understand which variables have greatest effect on the critical model outputs. This work applies uncertainty quantification and sensitivity analysis to determine the most influential input parameters in the CON1D model of heat transfer and solidification in steel continuous casting with slag. Results show that the slag rim greatly affects heat flux near the meniscus, so control of its size is important. Heat flux and temperature down the mold depend greatly on velocity of the solid slag layer, and slag solidification temperature, which control the slag layer thickness, which in turn affects the interfacial resistance that controls heat transfer in the process. Scale formation on the mold coldface greatly increases mold temperatures. Based on the results presented here, models of heat transfer in continuous casting such as CON1D would benefit from plant measurements such as slag rim size and solid slag velocity, and lab measurements such as slag viscosity at lower temperatures, to better characterize this important slag property.

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Dynamic Measurement of Specific Heat Above 1000 K

Urban

Anhalt

2022

Int J Thermophys

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With increasing demand of thermophysical property data at high temperatures in the field e.g. of space aeronautics and manufacturing new measurement methods need to be established to guarantee reliable and SI-traceable measurements up to 3000 K. In the framework of the European Metrology Programme for Innovation and Research (EMPIR) within the joint research project Hi-Trace the dynamic emissivity measurement at PTB has been advanced to determine the specific heat up to around 2000 K. This paper outlines the necessary technical advancements such as an induction heating system, the measurement principle which utilize graphite coated samples and uncertainty evaluation using an adaptive Monte Carlo method. The specific heat of graphite and tungsten was measured in a temperature range from 1000 K to 2000 K with relative expanded uncertainties ($$k=2$$ k = 2 ) ranging from 8 % to 12 %.

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Towards accurate measurements of specific heat of solids by drop calorimetry up to 3000 °C

Cited by 4 publications

References 14 publications

Thermophysical Property Measurements with the Finite Bar

Thermophysical Property Measurements with the Finite Bar

Uncertainty Quantification in Modeling Mold Heat Transfer in Steel Continuous Slab Casting with CON1D

Dynamic Measurement of Specific Heat Above 1000 K

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