In situ measurements of frame wall thermal resistance

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Journal titleASHRAE Transactions
Pages66776; # of pages: 592
Subjectthermal resistance; walls; frame construction; field tests; heat transfer; heat flow meter measurement; integrating heat flow; hfm - calorimeter measurements comparison; thermal lag and integrating period; mean temperature effects; time of day; Walls
AbstractHeat flow meter and calorimeter measurements have been used in investigating factors that influence in situ thermal resistance measurements on wood frame walls: wall orientation, length of measurement period, thermal lag, mean temperature effects and time of measurement. They have also been used to determine the installed resistance of insulation and the effect of framing members on the resistance of the whole wall. Knowledge of the dynamic effects of a test wall is essential in obtaining accurate results. Accurate thermal resistance measurements were obtained for wood frame walls from 24 h integrated values of heat flow and temperature difference (appropriate adjustments were made for time lag and mean temperature effects). Other measurement strategies produced less accurate (but acceptable) or completely unacceptable results.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number20851
NPARC number20374288
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Record identifier2e0b3632-44a6-49c4-9f31-bd4d6c684c1c
Record created2012-07-23
Record modified2016-05-09
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