The atmospheric dispersion of the NOX plume that will be emitted from a new power–plant, at present under installation, was simulated at micro–scale with Micro–Swift–Spray (MSS) Model. The plant will be constructed in a residential urban area in the town of Modena (Po Valley, Northern Italy), where low wind speeds and thermal inversions are quite frequent. Simulation results point out a different behavior of urban canopy in influencing the 3D dispersion patterns among urban obstacles, according to atmospheric mixing conditions: in case of moderate wind events, urban canyon phenomena may occur with a consequent increasing of NOX concentration gradients among buildings, while with low winds the near–field influence of the buildings emphasizes pollutant accumulation. The MSS simulated NOX concentrations result always much lower than the regulatory limits for air quality. The comparison of simulation results with measured concentration data for NOX shows the importance of micro–scale dispersion modeling to perform an accurate and reliable assessment of meteorological condition effects on pollutant distribution, and the ability of MSS in providing reliable simulations of atmospheric dispersion.

Micro–scale simulation of atmospheric emissions from power–plant stacks in the Po Valley / Ghermandi, Grazia; Fabbi, Sara; Zaccanti, MARCO MICHELE; Bigi, Alessandro; Teggi, Sergio. - In: ATMOSPHERIC POLLUTION RESEARCH. - ISSN 1309-1042. - ELETTRONICO. - 6:3(2015), pp. 382-388. [10.5094/APR.2015.042]

Micro–scale simulation of atmospheric emissions from power–plant stacks in the Po Valley

GHERMANDI, Grazia;FABBI, Sara;ZACCANTI, MARCO MICHELE;BIGI, Alessandro;TEGGI, Sergio
2015

Abstract

The atmospheric dispersion of the NOX plume that will be emitted from a new power–plant, at present under installation, was simulated at micro–scale with Micro–Swift–Spray (MSS) Model. The plant will be constructed in a residential urban area in the town of Modena (Po Valley, Northern Italy), where low wind speeds and thermal inversions are quite frequent. Simulation results point out a different behavior of urban canopy in influencing the 3D dispersion patterns among urban obstacles, according to atmospheric mixing conditions: in case of moderate wind events, urban canyon phenomena may occur with a consequent increasing of NOX concentration gradients among buildings, while with low winds the near–field influence of the buildings emphasizes pollutant accumulation. The MSS simulated NOX concentrations result always much lower than the regulatory limits for air quality. The comparison of simulation results with measured concentration data for NOX shows the importance of micro–scale dispersion modeling to perform an accurate and reliable assessment of meteorological condition effects on pollutant distribution, and the ability of MSS in providing reliable simulations of atmospheric dispersion.
2015
6
3
382
388
Micro–scale simulation of atmospheric emissions from power–plant stacks in the Po Valley / Ghermandi, Grazia; Fabbi, Sara; Zaccanti, MARCO MICHELE; Bigi, Alessandro; Teggi, Sergio. - In: ATMOSPHERIC POLLUTION RESEARCH. - ISSN 1309-1042. - ELETTRONICO. - 6:3(2015), pp. 382-388. [10.5094/APR.2015.042]
Ghermandi, Grazia; Fabbi, Sara; Zaccanti, MARCO MICHELE; Bigi, Alessandro; Teggi, Sergio
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/1066575
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