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Envelope air pressure design load: an approach for hygrothermal analysis of retrofitted high-rise masonry wall assemblies

From National Research Council Canada

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Affiliation
  1. National Research Council of Canada. NRC Institute for Research in Construction
FormatText, Article
Conference2nd International Building Physics Conference, September 14, 2003, Leuven, Belgium
SubjectHygrothermal properties; Masonry walls; Heat performance; Moisture performance; hygrothermal; modeling; boundary conditions; building envelope; retrofit; tall building; weather; airflow; differential pressure; wind induced; indoor environment; mechanical ventilation
Abstract
This paper presents the analytical approach to predict envelope air-pressure differential that was newly implemented into IRC's computer weather analysis tool for hygrothermal calculations WeatherSmart-1.1. In addition to its original features, this tool now allows obtaining in a user-friendly way yearly profiles of hourly envelope air-pressure differential for both low and high-rise buildings. Hourly envelope air-pressure profiles are derived from the knowledge of both indoor and outdoor hygrothermal design loads. WeatherSmart-1.1 is being used within the frame work of a research project to assess effects of adding supplementary insulation and air-sealing retrofit on the long-term hygrothermal performance of different wall types used in Canadian high-rise buildings. Within the frame work of this research project, the paper also introduces how effects of moist air infiltration and exfiltration across tall building envelopes are assessed using IRC's advanced HAM model hygIRC.
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  • 2nd International Building Physics Conference (1 September 2003): 379–388.
LanguageEnglish
Peer reviewedYes
NRC numberNRCC 46111
NRC-IRC-15177
NPARC number20386449
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Record identifierc5b5884d-4681-473a-ba5e-48c3772952af
Record created2012-07-25
Record modified2022-07-22
Date modified: