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Indoor air quality evaluation in naturally cross-ventilated buildings for education using age of air
Ist Teil von
Journal of physics. Conference series, 2021-11, Vol.2069 (1), p.12182
Ort / Verlag
IOP Publishing
Erscheinungsjahr
2021
Link zum Volltext
Quelle
Free E-Journal (出版社公開部分のみ)
Beschreibungen/Notizen
Abstract
Natural ventilation (NV) is a strategy of bioclimatic design to promote hygrothermal comfort and indoor air quality (IAQ). Nowadays, COVID-19 pandemic highlights the review of ventilation standards. In Mexico, the IAQ standard states a minimum of 6 ACH for educational buildings.
ACH
considers NV as an ideal piston flow and does not provide information of indoor airflow distribution. In this work, new age of air associated parameters are proposed, considering the indoor airflow distribution: the air renovation per hour (
ARH
) and the renovation parameter R. An isolated educational building located in a rural region is studied. Four window configurations of cross-ventilation are considered. All configurations have one windward window located at bottom. The configurations axial and upward have one leeward window at bottom and top, respectively. While, configurations corner and upward corner have one lateral side window at bottom and top, respectively. A CFD model of the educational building is validated with experiments. The axial configuration has the best performance according to
ACH
, nevertheless has the worst performance according to
ARH
and
R
. The results show that NV evaluation using
ACH
can lead to wrong decisions. An improvement of NV standard with the age of air associated parameters is recommended.