Thermal conductivity of insulating refractory materials: Comparison of steady-state and transient measurement methods
Diana Vitiello, Benoit Naït‐Ali, Nicolas Tessier‐Doyen, Thorsten Tonnesen, Luís Laím, Lionel Rebouillat, David Stanley Smith
Abstract
Measurements of thermal conductivity with the heat flow meter, laser flash method, hot disk method and hot wire method are compared on two kinds of refractory materials: Insulating Boards and Insulating Fireclay Bricks. Heat losses, humidity, anisotropy and heterogeneity can explain the variation in thermal conductivity values obtained with the different techniques. If they are taken into account in the analysis, discrepancy within 10% can be found. The choice of the technique depends on the investigated material and on the level of information required.
Topics & Concepts
Thermal conductivityMaterials scienceThermal conductivity measurementTransient (computer programming)Heat flowAnisotropyThermal conductionConductivityLaser flash analysisFlash (photography)Composite materialThermalSteady state (chemistry)Refractory (planetary science)ThermodynamicsOpticsChemistryPhysicsPhysical chemistryComputer scienceOperating systemThermography and Photoacoustic TechniquesBuilding Energy and Comfort OptimizationRadiative Heat Transfer Studies