Published: Jan 1967
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A cryogenic thermal-conductivity heat-flow-meter apparatus (cryogenic heat meter), a modification of the apparatus described in a previous ASTM publication, is described. This apparatus enables a rapid determination of thermal conductivity of felt, powder, and block materials to be made at cryogenic temperatures and at atmospheric pressure. The apparatus is particularly suitable for screening a large number of specimens, for obtaining product development information, and for quality control testing. The correlation among results obtained with the cryogenic heat meter and the Wilkes calorimeter and a National Bureau of Standards' cryogenic calorimeter is excellent. Correlation of cryogenic heat-meter results with those obtained at higher temperatures on a heat-flow-meter apparatus and a guarded-hot-plate apparatus is good. A range of temperatures can be applied to the test specimen. Therefore, use conditions can be simulated, if desired.
thermal conductivity, heat transfer, thermal insulation, cryogenics, low temperature, heat transmission, quality control
Kinzer, G. R.
Research physicist, Johns-Manville Research and Engineering Center, Manville, N.J.
Pelanne, C. M.
Specialist, Johns-Manville Research and Engineering Center, Manville, N. J.