Analysis of Thermal-Conductivity Measurement Data from International Comparison of National Laboratories

Hay, Bruno; Zarr, Robert R.; Stacey, Clark; Lira-Cortes, Leonel; Hammerschmidt, U.; Sokolov, N. A.; Zhang, J.; Filtz, Jean-Rémy; Fleurence, Nolwenn

doi:10.1007/s10765-012-1225-x

Cited by 10 publications

(19 citation statements)

References 6 publications

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“…the manufacturer formulation [6,7]. As will be shown later, the effective thermal conductivities for Materials (6) and (7) were lower than Materials (4) and (9), presumably because graphite reduces the radiative heat-transfer contribution. Table 3 summarizes the thermal test conditions and the number of measurements conducted for each comparison.…”

Section: Methodsmentioning

confidence: 87%

“…In the standard double sided mode of operation, the two cold plates are maintained at equivalent temperatures Guarded-hot-plate schematic, double-sided mode of operation for a specimen pair. 7 For consistency, the temperature data in this paper are presented in kelvin, requiring conversion, where necessary, of the source data recorded in °C.…”

Section: Apparatusmentioning

confidence: 99%

“…Furthermore, an analysis of the causal factors affecting the test results provides guidance for improved designs in future comparisons. This paper presents an extensive review of the LNE and NIST thermal conductivity data which are extracted and compiled from three previous comparisons [4][5][6][7][8], identified in this paper as Rounds 1-3. The measurement data from the other laboratory participants in Rounds 1 and 2 are not discussed in this paper.…”

Section: Introductionmentioning

confidence: 99%

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Collaborative guarded-hot-plate tests between the Laboratoire national de métrologie et d’essais and the National Institute of Standards and Technology

et al. 2017

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Nomenclature A Specimen metering surface area normal to heat flow direction, m 2 ANOVA Analysis of variance BIPM Bureau International des Poids et Mesures b Half-side or radius of meter plate, m Metrologia Collaborative guarded-hot-plate tests between the Abstract A collaborative study to compare the long-term measurement performance between guardedhot-plate facilities at the Laboratoire national de métrologie et d'essais (LNE) in France and the National Institute of Standards and Technology (NIST) in the United States is presented.Thermal conductivity data were compiled from three international comparisons organized from 1997 to 2014. Measurements were conducted in accordance with standardized test methods (ISO 8302 or ASTM C 177) over a temperature range from 280 K to 320 K. Nine thermal insulating materials (either mineral fiber or expanded polystyrene) were examined covering broad ranges of bulk densities (13 kg · m −3 -200 kg · m −3 ) and thicknesses (13 mm-70 mm). A different set of specimens was utilized for each comparison. Results of this study indicate that, over a 17 year interval, the majority of test data from LNE and NIST agreed to within ±1.0%, or less, for mineral fiber materials and to within ±0.5%, or less, for expanded polystyrene. The long-term variability limit of 1% between the two laboratories is in good agreement with their current measurement uncertainties. Regression coefficients and their standard uncertainties for a straight-line model relating thermal conductivity to temperature from 280 K to 320 K were computed by material and laboratory. Graphical analysis of the data and corresponding fits exhibit consistent behavior by material type between the two laboratories. Sources of measurement variability are addressed.

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Section: Methodsmentioning

confidence: 87%

Section: Apparatusmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Collaborative guarded-hot-plate tests between the Laboratoire national de métrologie et d’essais and the National Institute of Standards and Technology

et al. 2017

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“…The general objective of the technical work is to consolidate the traceability and capabilities [5][6][7] for the measurement of thermal conductivity by Guarded Hot Plate (GHP) in European emerging NMIs (WP3):  Transfer the knowledge from experienced laboratories toward the NMIs of the Central and Western Balkans countries, through training courses, tutorials and workshops.  Implement thermal conductivity measurements by the GHP method in emerging NMIs by participating in an inter-laboratory comparison whose main objectives are to assess the coherency of measurements among involved laboratories.…”

Section: Thermal Conductivitymentioning

confidence: 99%

Development of New Traceable European Capabilities in Thermal Metrology

Filtz

Arifovic

Sadli

et al. 2017

IJAQ

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This paper deals with a new European project in which the overall objective is to enhance the availability of facilities in the field of thermal metrology (e.g. high temperature contact thermometry, non-contact thermometry and thermo-physical properties of materials characterisation) in European emerging National Metrology Institutes (NMIs), where access to these types of facilities is currently limited.

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Section: Thermal Conductivitymentioning

confidence: 99%

Development of new traceable European capabilities in thermal metrology

Filtz

Arifovic

Sadli

et al. 2015

17th International Congress of Metrology

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Résumé. Cet article traite d'un nouveau projet européen dont l'objectif global est d'améliorer la disponibilité d'installations dans le domaine de la métrologie thermique (par exemple : pour les hautes températures en thermométrie par contact, en pyrométrie et pour la caractérisation des propriétés thermo-physiques des matériaux), dans les Instituts Nationaux ou Laboratoires associés de Métrologie européens émergents (INM, LA), où l'accès à ces types d'installations est actuellement limité.

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Analysis of Thermal-Conductivity Measurement Data from International Comparison of National Laboratories

Cited by 10 publications

References 6 publications

Collaborative guarded-hot-plate tests between the Laboratoire national de métrologie et d’essais and the National Institute of Standards and Technology

Collaborative guarded-hot-plate tests between the Laboratoire national de métrologie et d’essais and the National Institute of Standards and Technology

Development of New Traceable European Capabilities in Thermal Metrology

Development of new traceable European capabilities in thermal metrology

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