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The thermal conductivity of perlite insulation under varying conditions of temperature, humidity and packing density

The thermal conductivity of perlite insulation under varying conditions of temperature, humidity and packing density
The thermal conductivity of perlite insulation under varying conditions of temperature, humidity and packing density
Measurements have been made of the thermal conductivity of expanded perlite under varying conditions of density and humidity over the temperature range 113 K to 298 K. A thermal conductivity test cell was constructed according to the requirements of ASTM C177. The measurement system and test methods are described. The new test data shows that perlite conditioned in standard conditions has a thermal conductivity of 0.0153 to 0.0193 W/mK at 113 K. Varying the relative humidity (R.H) of the environmental chamber used to prepare some samples from 40% to 80%, made little to no change to the thermal conductivity values. However, increasing the density of the perlite packed into the cavity of test cell, by 15% to 25% resulted in moderate increases in the thermal conductivity at the maximum density of 2.0% and 7.7% and was dependent on the source.
Bailey, W.O.S.
c356b2e3-a783-4b4c-8c7b-521696d3b37c
McDonald, P.C
b1e849c1-768d-4737-b51b-767727cf6692
Bostock, T.D
39ed1bc0-8d6f-49bc-96f0-91af23643df9
Bailey, W.O.S.
c356b2e3-a783-4b4c-8c7b-521696d3b37c
McDonald, P.C
b1e849c1-768d-4737-b51b-767727cf6692
Bostock, T.D
39ed1bc0-8d6f-49bc-96f0-91af23643df9

Bailey, W.O.S., McDonald, P.C and Bostock, T.D (2012) The thermal conductivity of perlite insulation under varying conditions of temperature, humidity and packing density. ICES 24- ICMC 2012 24th International Cryogenics Engineering Conference, Fukuoka-Ken, Japan. 14 - 18 May 2012. 4 pp .

Record type: Conference or Workshop Item (Poster)

Abstract

Measurements have been made of the thermal conductivity of expanded perlite under varying conditions of density and humidity over the temperature range 113 K to 298 K. A thermal conductivity test cell was constructed according to the requirements of ASTM C177. The measurement system and test methods are described. The new test data shows that perlite conditioned in standard conditions has a thermal conductivity of 0.0153 to 0.0193 W/mK at 113 K. Varying the relative humidity (R.H) of the environmental chamber used to prepare some samples from 40% to 80%, made little to no change to the thermal conductivity values. However, increasing the density of the perlite packed into the cavity of test cell, by 15% to 25% resulted in moderate increases in the thermal conductivity at the maximum density of 2.0% and 7.7% and was dependent on the source.

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More information

Published date: 15 May 2012
Venue - Dates: ICES 24- ICMC 2012 24th International Cryogenics Engineering Conference, Fukuoka-Ken, Japan, 2012-05-14 - 2012-05-18
Organisations: Engineering Science Unit

Identifiers

Local EPrints ID: 339059
URI: https://eprints.soton.ac.uk/id/eprint/339059
PURE UUID: 63ce1d73-0255-45da-a917-601df35a6b63

Catalogue record

Date deposited: 22 May 2012 13:19
Last modified: 30 Nov 2018 17:30

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