3D heat and air transport model for predicting the thermal resistance of insulated wall assemblies

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DOIResolve DOI: http://doi.org/10.1080/19401493.2010.532568
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TypeArticle
Journal titleInternational Journal of Building Performance Simulation
Pages117; # of pages: 17
SubjectLaboratory testing, 3D modeling, thermal resistance, air leakage, insulation, wood-frame walls, energy rating; Building envelope
AbstractA Wall Energy Rating (WER) system has been proposed to account for simultaneous thermal conduction and air leakage heat losses through a full-scale insulated wall system. Determining WER requires performing two standard tests on a full-scale wall specimen: a thermal resistance test and an air leakage test. A 3D model representation of the wall specimen is developed to combine the results of these tests to obtain an accurate prediction of the wall thermal resistance (apparent R-value) under the influence of air leakage. Two types of wall configurations were tested and simulated. The first one was a standard 2? by 6? wood stud frame construction, made of spruce, spaced at 16? (406 mm) o/c in 2.4 m x 2.4 m full-scale wall specimens. The second wall configuration was similar to the first one except that it included through-wall penetrations. The cavities of the two types of wall configurations were filled with different types of insulation, namely: glass fibre batts and two different types of open cell spray polyurethane foams (light density, 6.8 and 12 kg/m3 nominal), a total of six walls.
Publication date
LanguageEnglish
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number53583
21266
NPARC number20374817
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Record identifierd4a0922d-4de4-4ff6-9150-41c6ae427d35
Record created2012-07-23
Record modified2016-05-09
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