Contaminant removal effectiveness of displacement ventilation systems during heating season: summary results from three field studies

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TypeArticle
Proceedings titleASHRAE Transactions
Conference2012 ASHRAE Annual Conference, June 23-27 2012, San Antonio, TX, USA
ISSN0001-2505
ISBN9781936504350
Volume118
Issue2
Pages292299; # of pages: 8
SubjectCarbon dioxide concentrations; Contaminant removal; Displacement ventilation; Displacement ventilation system; Field studies; Heating season; Heating system; Indoor air quality; Room air; Ventilation effectiveness; Carbon dioxide; Heating; Indoor air pollution; Societies and institutions; Ventilation
AbstractA series of field studies on the performance of displacement ventilation (DV) were carried out in schools across Canada during the heating season over the last three years. Indoor air quality was evaluated using the IAQ index Contaminant Removal Effectiveness (CRE) based on carbon dioxide concentrations for three schools equipped with DV systems. Results from the three field studies have shown values of CRE to be higher than 0.7 (ventilation effectiveness specified in ASHRAE 62.1-2007 when DV systems are used for heating, with ceiling return). The measured CRE in the three schools was often greater than 1.0 even in the middle of the heating season. The results show that as long as the supply air is cooler than the room air, DV system works well in achieving good contaminant stratification and ventilation effectiveness in the space when combined with a perimeter heating system. ©2012 ASHRAE.
Publication date
LanguageEnglish
AffiliationConstruction; National Research Council Canada
Peer reviewedYes
NPARC number21270044
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Record identifierb984d791-ccc9-4590-8d7f-400752ebbe79
Record created2013-12-16
Record modified2017-04-05
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