A Procedure for determining the thermal diffusivity of materials

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AuthorSearch for:
TypeArticle
Journal titleJournal of Thermal Insulation
ISSN0148-8287
Volume10
Pages236242; # of pages: 7
SubjectRoofing; diffusivity; thermal conductivity; specific heat; heat transfer; granite; walls; roofs; thermal diffusivity; thermal conductivity; heat capacity; specific heat; granite; guarded hot plate apparatus; Insulation; Couvertures; diffusivité; conductivité thermique; chaleur massique; transfert de chaleur; mur; toiture
AbstractThe thermal diffusivity of a solid material can be determined using pairs of identical specimens prepared for a thermal conductivity determination in a Guarded Hot Plate apparatus (ASTM C-177). Specimens are placed one on top of the other with a temperature sensor between them, and the pair is placed between the heat-sink plates of a Guarded Hot Plate apparatus. The temperature of these plates is varied at a constant rate. The thermal conductivity, specific heat and density of the material are assumed to be constant over the range of temperature used for the test. For a pair of granite slabs, at a mean temperature of 8 degrees C, the thermal diffusivity is 8.49 x 10-7 m2/s + or - 0.02 x 10-7 m2/s.
Publication date
LanguageEnglish
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
IdentifierIRC-P-1480
NRC number28337
1766
NPARC number20377619
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Record identifier575a33e0-3064-4d42-a904-e05be08152e5
Record created2012-07-24
Record modified2016-05-09
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