An Approach to validating computational models for hygrothermal analysis - full scale experiments

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ConferenceProceeding of the 3rd International Conference on Computational Heat and Mass Transfer: 26 May 2003, Banff, Alberta
Pages243251; # of pages: 9
SubjectHygrothermal properties; Walls
AbstractRecent research in the field of assessment of hygrothermal response has focused on either laboratory experimentation or modelling, but less work has been reported in which both aspects are combined. Such type of studies can potentially offer useful information regarding the benchmarking of models and related methods to assess hygrothermal performance of wall assemblies. An advanced hygrothermal computermodel called hygIRC was used to assess the hygrothermal response of wood sheathing board, a key component of wood-frame wall assemblies. hygIRC uses hygrothermal properties of materials derived from tests on small-scale specimens undertaken in the laboratory. The intent of this work was to obtain experimental results on the hygrothermal the response of the wood sheathing, in full-scale wall assemblies, when subjected to nominally steady-state environmental conditions. The drying rates of wall assemblies featuring several different membranes in contact with the wood sheathing were determined from experiments undertaken in a controlled laboratory setting. These results were subsequently compared to those obtained using hygIRC as a means of helping benchmark the simulation model. Conclusions from these studies are definite for both full-scale tests ? simulation results compare favourably with those obtained from the experiments. This suggests that the model adequately emulates the hygrothermal response of specific wood-frame assembly components, such as wood sheathing, over a range of environmental conditions to which it was subjected in the experiments. These results further enhance confidence towards the implementation of hygIRC in broader based parametric studies.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number45215
NPARC number20378515
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Record identifierb157b1b2-226e-4940-b1fa-476732c65989
Record created2012-07-24
Record modified2016-05-09
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