Paper 5: Volume 4 No.1 June 2005 Edition
Natural Ventilation Potential of Urban
Buildings
M. Germano1, C. Ghiaus2, C.-A.
Roulet1 and F. Allard2
1Ecole Fédérale Polytechnique de Lausanne,
Switzerland
2Université de La Rochelle, France
Abstract
The design of a building should provide the flow paths
needed for natural ventilation. Therefore, the decision to apply natural
ventilation should be taken early in the building design process, when
little information is available for airflow estimation. To deal with this
lack of data, a semi-qualitative method to assess the potential of an
urban site to host a naturally ventilated building is proposed. First,
natural ventilation driving forces and constraints are assessed by using
comfort criteria, statistical meteorological data and user-provided
information. Then, the site of interest is compared to other, well known
sites using criteria related to both natural ventilation driving forces
and constraints. This method compares and ranks the site within the base
sites using a qualitative multicriteria analysis procedure. The result of
the comparison shows if the assessed site has a higher potential for
application of natural ventilation than a set of known sites.
Key words: natural ventilation potential, urban
environment, preliminary design, qualitative modelling.
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