A field validation of a roof-top dispersion formula in an urban centre

Lam, K.S.; Kot, S. C.; Fung, K.W.; Ma, Rujin

doi:10.1016/0167-6105(85)90041-8

Cited by 4 publications

(1 citation statement)

References 2 publications

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“…However, few studies have focused on the particular case of diffusion of roof-stack emissions in the immediate vicinity of their source. Previous studies [9][10][11] were conducted using a limited number of samplers placed near the fresh air intakes. Most of the data are less useful for modeling purposes, because the models predict minimum dilution (i.e., dilution on the plume centerline), and the majority of the samplers were placed outside of the plume's path during most of the experiments.…”

Section: Airmentioning

confidence: 99%

Air Intake Contamination by Building Exhausts: Tracer Gas Investigation of Atmospheric Dispersion Models in the Urban Environment

Lazure

Saathoff

Stathopoulos

2002

Journal of the Air & Waste Management Association

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The establishment of a safe distance between sources of pollution and air intakes is based on a complex exercise that should take into account several wind, physical, and topographical factors. To estimate the maximum concentrations of the pollutants as a function of the distance from the emission source, some heating, ventilation, and air conditioning (HVAC) system designers use the atmospheric dispersion models suggested by the American Society of Heating, Refrigerating, and Air-Conditioning Engineers (ASHRAE). Two of these models, the Halitsky and Wilson-Chui-Lamb models, have been developed and evaluated mainly with laboratory data. There have been relatively few evaluations with full-scale field data. The objective of this study, carried out on a building in downtown Montreal, Quebec, Canada, was to compare the measured concentrations of a tracer gas emitted by an exhaust stack with those predicted by these models. The results indicate that the Halitsky model gives lower than actual dilution, while the Wilson-Chui-Lamb model generally gives acceptable estimates, with occasional overestimations of the dilution. BACKGROUNDThe reintroduction of toxic or odorous gases emitted from rooftop stacks may affect the indoor air quality of a building and result in complaints, health problems,

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Section: Airmentioning

confidence: 99%