Calculation of thermal conductance based on measurements of heat flow rates in a flat roof using heat flux transducers

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TypeArticle
Proceedings titleASTM Special Technical Publication
ConferenceProceedings of a Symposium on Building Applications of Heat Flux Transducers: 22 September 1983, Philadelphia, PA, USA
ISSN0066-0558
Volume885
Pages184202; # of pages: 19
SubjectRoofing; thermal conductivity; heat transfer; flat roofs; thermal insulation; flat roofs; thermal insulation; transfer functions; thermal lag; Heat performance; Couvertures; conductivite thermique; transfert de chaleur; toiture terrasse; isolation thermique
AbstractHeat flow rates through 60-mm-thick rigid mineral fiber insulation mounted in the flat roof of an outdoor test facility were measured with heat flux transducers. The temperature differences across the insulation were measured simultaneously with thermocouples. Three different analytical procedures were used to calculate the thermal conductance of the insulation: (a) the ratio of heat flow rate to temperature difference; (b) the slope of heat flow rate as a function of temperature difference and mean temperature; and (c) transfer functions. The results obtained with these three methods are compared. The effect of ignoring thermal lag was estimated for the first two methods.
Publication date
LanguageEnglish
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
IdentifierDBR-P-1351
NRC number25350
1557
NPARC number20378468
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Record identifier69460ac9-6eed-44cb-8547-fa903dd51def
Record created2012-07-24
Record modified2016-05-09
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