Analytical evaluation of the dispersion of polluting emissions from building stacks Abstract The occasional introduction of polluting emissions into buildings by fresh air intakes is one of the main causes of the poor air quality in some workplaces, which can have harmful effects on people’s health, particularly those who work in laboratories or hospital establishments. Computer models are commonly used to determine whether existing or expected industrial installations comply or will comply with the American National Ambient Air Quality Standard (NAAQS) or the standards of other countries. These models also promote the development of effective control strategies for reducing emissions of harmful atmospheric pollutants.The authors of this report evaluated the use of the different atmospheric dispersion models approved by the Environmental Protection Agency (EPA) to model the dispersion of stack effluents in order to determine their concentration at various locations on the roofs where they originate. The results were compared to those obtained in a wind tunnel and in the field. The authors produce an assessment of the advantages and disadvantages of the studied dispersion models according to each configuration, and suggest the one best adapted to each situation. Produced Under this Project Scientific Reports Analytical evaluation of the dispersion of roof stack emissions on buildings Research Report: R-643, R-576 Scientific Publications A Comparative study of ADMS, ASHRAE and Wind Tunnel Simulation for Rooftop Dispersion of Airborne PollutantsAli Bahloul, Stathopoulos T., Hajra B., Gupta A.Source : in Indoor Air 2008 : Proceedings of the 11th International Conference on Indoor Air Quality and Climate (11th : August 17-22, 2008 : Copenhagen, Denmark), 2008Estimation of pollutant concentrations from building roof stacks: comparison of various modelsAli Bahloul, Stathopoulos T., Hajra B.Source : in Healthy Buildings 2009 : 9th International Conference & Exhibition, (9th : September 13-17, 2009 : Syracuse, USA), 2009Étude comparative des modèles de dispersion des émissions polluantes des cheminées des immeubles : échanger connaissainces et expériencesAli Bahloul, Stathopoulos T., Hajra B.Source : in L'intégration de la SST au coeur de l'organisation Congrès de l'Association québécoise pour l'hygiène, la santé et la sécurité du travail / AQHSST, (31e : 13-15 mai, 2009 : Drummondville, Canada), 2009, (http://www.aqhsst.qc.ca/conf09/BahlouolA.pdf)Dispersion of effluent from building roof stacks: Comparison of various models, CFD and wind tunnel approachAli Bahloul, Stathopoulos T., Hajra B.Source : in Sustainable Energy Use in Buildings : REHVA World Congress : Clima 2010, (10th : May 9-12, 2010 : Antalia, Turkey), 2010Assessment of pollutant dispersion from rooftop stacks: ASHRAE, ADMS and wind tunnel simulationHajra B., Stathopoulos T., Ali BahloulSource : Building and Environment, vol. 45, no 12, 2010, p. 2768-2777CFD approaches to predicting dilution from exhaust stacks in urban areasStathopoulos T., Chavez M., Ali BahloulSource : in Sustainability knows no borders : ASHRAE Annual Conference (June 25-29, 2011 : Montréal Canada), 2011A wind tunnel study of the effects of adjacent buildings on near-field pollutant dispersion from rooftop emissions in an urban environmentHajra B., Stathopoulos T., Ali BahloulSource : Journal of Wind Engineering and Industrial Aerodynamics, vol. 119, 2013, p. 133-145 Other Project(s) You May be Interested in Evaluation of Direct Reading Instrument and Filtration Technology Performance to Improve Strategies to Control Workers’ Exposure to Ozone Additional Information Type: Project Number: 0099-6120 Status: Completed Year of completion: 2009 Research Field: Chemical and Biological Hazard Prevention Team: Ted Stathopoulos (Université Concordia)Chantal Dion (IRSST)Bodhisatta Hajra (Université Concordia)