- Author
- Djebbar, R. | Kumaran, M. K. | VanReenen, D. | Tariku, F.
- Title
- Use of Hygrothermal Numerical Modeling to Identify Optimal Retrofit Options for High Rise Buildings.
- Coporate
- National Research Council of Canada, Ottawa, Ontario
- Report
- NRCC-46032,
- Distribution
- FOR MORE INFORMATION CONTACT: National Research Council of Canada, Institute for Research in Construction, Ottawa, Ontario, K1A 0R6, Telephone (613) 993-2607, Fax: (613) 952-7673, Email: Irc.Client-Services@nrc.ca Website: http://irc.nrc-cnrc.gc.ca/fulltext/nrcc46032/
- Book or Conf
- Heat Transfer Conference, 12th International. Proceedings. August 18-23, 2002, Grenoble, France, 165-170 p., 2002
- Keywords
- high rise buildings | numerical models | heat transfer | mass transfer | moisture | proous media | weather effects | mathematical models | statistics
- Identifiers
- building envelope; coupled heat-mass transfer; indoor environment; retrofit
- Abstract
- Using numerical modelling to simulate and predict the hygrothermal (i.e., combined thermal and moisture) performance of building envelopes is very recent. Key questions include: how to model accurately coupled heat-air and capillary moisture transports in building envelope components; a satisfactory definition of a set of representative environmental boundary conditions to be used for long-term hygrothermal calculations; how to characterize the moisture- and temperature-dependent properties; the effect of aging and cyclic environmental conditions on porous building materials; and how to develop sound criteria to predict the moisture durability of building envelope components. This paper presents the findings of a research project involving detailed hygrothermal modelling. The heat, air and moisture results demonstrated that the in-house model could be adapted successfully for high-rise building calculations. The findings also show how the long-term hygrothermal performance of typical wall systems can be assessed using numerical modelling. A short description of an advanced in-house heat, air and moisture model, hygIRC, is also presented.