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International Journal of Environment Science and Technology
Center for Environment and Energy Research and Studies (CEERS)
ISSN: 1735-1472 EISSN: 1735-1472
Vol. 12, No. 2, 2015, pp. 693-704
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Bioline Code: st15063
Full paper language: English
Document type: Research Article
Document available free of charge
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International Journal of Environment Science and Technology, Vol. 12, No. 2, 2015, pp. 693-704
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Tri-generation power plant and conventional boilers: pollutant flow rate and atmospheric impact of stack emissions
Ghermandi, G.; Teggi, S.; Fabbi, S.; Bigi, A. & Zaccanti, M.M.
Abstract
The atmospheric impact of stack emissions
from a power plant (tri-generator and boilers) that will be
installed in an urban area in the central Po valley (Northern
Italy), characterized by calm wind events, is studied and
compared with the impact of the existing plant (conventional
boilers). Both the plants are supplied by methane
gas. The atmospheric dispersion of NOx emitted is simulated,
both in the current and future scenario, by the software
package ARIA INDUSTRY. The NOx emission rates
are set equal to the regulatory emission limits for existing
and future boilers, while the tri-generation system emission
rates are set equal to the emission limits certified by the
system manufacturer. The simulation periods focus over
the 2010 winter season. The simulation estimates the
impact of NOx emissions on air quality (vertical concentration
profiles and concentration maps at the ground) in
the urban area close to the plant. The future power plant
impact on air quality results lower than the impact of the
existing plant, even if the yearly total mass of pollutants
emitted in atmosphere from the new power plant is higher
than from the existing plant. The emissions of conventional
boilers result the main responsible of the air pollution at the
ground in the future scenario.
Keywords
Atmospheric pollution; Dispersion model; Methane-fuelled boiler emission; SPRAY; Tri-generation power plant emission; Vertical concentration profile
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