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Abstract
Thermal conductivity measurements of four thermal insulation reference materials are presented. The measurements were obtained from an international study of guarded-hot-plate laboratories in Canada, France, Japan, United Kingdom and the United States. For each reference material, the study requires five independent replicate measurements at a fixed temperature of 297.15 K, and single-point measurements at 280K, 290 K, 300 K, 310 K, and 320K. An important finding from the replicate analysis is the existence of a laboratory-material interaction; thate is, there are laboratory-to-laboratory differences in both location and variation that change from aterial to material. The major underlying source for the variability (both within and between laboratory)( in the replicate data is discussed. The analysis of themulti-temperature data supports the laboratory0material interaction as exhibited in the fixed-temperature repliacvate data. The multi-temperature analysis also reveals an increasing difference between laboratories as the temperature departs from 297.15 K.
Thermal conductivity measurements of four thermal insulation reference materials are presented. The measurements were obtained from an international study of guarded-hot-plate laboratories in Canada, France, Japan, United Kingdom and the United States. For each reference material, the study requires five independent replicate measurements at a fixed temperature of 297.15 K, and single-point measurements at 280K, 290 K, 300 K, 310 K, and 320K. An important finding from the replicate analysis is the existence of a laboratory-material interaction; thate is, there are laboratory-to-laboratory differences in both location and variation that change from aterial to material. The major underlying source for the variability (both within and between laboratory)( in the replicate data is discussed. The analysis of themulti-temperature data supports the laboratory0material interaction as exhibited in the fixed-temperature repliacvate data. The multi-temperature analysis also reveals an increasing difference between laboratories as the temperature departs from 297.15 K.
Date
10/2002
10/2002
Author(s)
R Zarr; J Filliben
R Zarr; J Filliben
Page(s)
3-16
3-16
Keyword(s)
guarded hot plate; interlaboratory; thermal insulation; thermal conductivity; SRM
guarded hot plate; interlaboratory; thermal insulation; thermal conductivity; SRM