The emission models have a double purpose in function of the scale on which they work. They can predict the emissions at regional or national level, permitting to obtain the emission inventories at these levels or they can predict the effects on emissions produced by changes in the design or operation of urban transportation systems at a very local level. The distinction between the different applications of the emission models is very important because the data needed are very unlike. The method proposed in this paper goes forward the traditonal approach of average speed model, but it uses another variable in addition to speed, the acceleration rate (or the product speed-acceleration), to describe in more detail the vehicle’s operations. This type of model assigns an emission rate to each instantaneous combination of the two chosen variables (the timescale is usually every second). Data for the instantaneous models are derived from continuous measurements of speed and emissions. Emission rates corresponding with operating conditions in certain bands are combined to provide a two-dimensional matrix of emission factors, classified by the two operational variables. This method has been used to develop models following "the instantaneous speed approach" as presented in the paper.

“Modem2”: un modello di calcolo delle emissioni per la gestione del traffico ed il controllo della qualità dell’aria in ambito urbano / Pronello, Cristina - In: Il trasporto pubblico nei sistemi urbani e metropolitani / AMOROSO S.; CROTTI A.. - STAMPA. - MILANO : Franco Angeli, 1997. - ISBN 9788846402523. - pp. 182-198

“Modem2”: un modello di calcolo delle emissioni per la gestione del traffico ed il controllo della qualità dell’aria in ambito urbano

PRONELLO, CRISTINA
1997

Abstract

The emission models have a double purpose in function of the scale on which they work. They can predict the emissions at regional or national level, permitting to obtain the emission inventories at these levels or they can predict the effects on emissions produced by changes in the design or operation of urban transportation systems at a very local level. The distinction between the different applications of the emission models is very important because the data needed are very unlike. The method proposed in this paper goes forward the traditonal approach of average speed model, but it uses another variable in addition to speed, the acceleration rate (or the product speed-acceleration), to describe in more detail the vehicle’s operations. This type of model assigns an emission rate to each instantaneous combination of the two chosen variables (the timescale is usually every second). Data for the instantaneous models are derived from continuous measurements of speed and emissions. Emission rates corresponding with operating conditions in certain bands are combined to provide a two-dimensional matrix of emission factors, classified by the two operational variables. This method has been used to develop models following "the instantaneous speed approach" as presented in the paper.
1997
9788846402523
Il trasporto pubblico nei sistemi urbani e metropolitani
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/1395987
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