Large-scale laboratory measurements and benchmarking of an advanced hygrothermal model

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ConferenceCIB 2004 Conference: 02 May 2004, Toronto, Ontario
Pages111; # of pages: 11
Subjectair transport, building system, drying, envelope, heat transfer, mass transfer, modeling, moisture, experimental, wood product; Hygrothermal properties
AbstractThe hygrothermal performance of a building envelope system is dictated by the response of the system to combined heat, air and moisture fluctuations produced by exterior and interior conditions that exist on either side of the envelope. Recent research in the field of assessment of hygrothermal response has focused either on laboratory experimentation or on modelling, but less work has been reported in which both aspects are combined. Indeed, it is generally acknowledged that assessing the hygrothermal performance of building envelope systems is both expensive and time consuming. Such type of studies can potentially offer useful information regarding the benchmarking of models and related methods to assess hygrothermal performance of wall assemblies. This paper reports on the use of an advanced hygrothermal computer model hygIRC to assess the hygrothermal response of various components in wood-frame wall assemblies when subjected to nominally steady-state environmental conditions. The model uses hygrothermal properties of materials derived from tests on small-scale specimens undertaken in the laboratory. A comparison is made of results obtained from computer model simulation to those derived from tests on large-scale specimens in controlled laboratory measurements. The experimental results were subsequently used to help benchmark the model. Specifically, this model was implemented, in this series of simulations, to assess the drying rate of various combinations of sheathing membranes in close contact with wood-based sheathing. Details of the experiments and of the results obtained from comparison of experiment and simulation are reported.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number46784
NPARC number20378577
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Record identifier7f3ca222-ae1d-4635-9751-fd975ed8e24a
Record created2012-07-24
Record modified2016-05-09
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