Exhaust Gas Dispersion
 
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Typical contour plot from numerical modeling using AERMOD

Typical probe inserted into the scale model to make instantaneous measurements

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Smoke can be Lethal
Pollutants discharged from power plants, commercial buildings, industrial processes, or hospitals can be carried for some distance with fallout occurring on neighbouring properties.

Stack emissions are often ingested into a neighbouring building’s ventilation system and subsequently distributed throughout the building. Corrective measures can be taken for these and other conditions contributing to SICK BUILDING SYNDROME.

Numerical Modeling:

Due to the complexity of variables involved, computational plume dispersion models are typically designed to yield conservative concentration results. Numerical models are used by Theakston Environmental as a preliminary assessment tool to ascertain potential problem areas which are subsequently assessed with quantitative exhaust dispersion modeling. A typical contour plot from numerical modeling using AERMOD exhaust gas dispersion modeling is shown.

Qualitative Physical Modeling:
Exhaust gas dispersion is simulated by introducing dyed water as the stack emission into a model placed in the water flume. This procedure provides immediate visual results since it permits observation of potential problem areas. Theakston Environmental employs specialized photographic equipment and techniques to capture and document plume trajectory.

Quantitative Physical Modeling:
The media used to simulate exhaust is introduced into the modular environment as a stack emission at elevated temperature. Resultant downstream temperature changes are monitored using sensitive thermistors and a multi-channel data acquisition system. The technique used for physical modeling is unique to Theakston Environmental and allows complete mapping of 3-D plume trajectories and determination of concentrations at critical points of impingement.