Development of the Motor Vehicle Emission Inventory (I)-Macro Scale Estimation Considering the Differentiated Mileages of Heavy Vehicles-:Macro Scale Estimation Considering the Differentiated Mileages of Heavy Vehicles
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概要
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The motor vehicle emissions should be estimated precisely and in detail. This paper improved the estimation of the Environmental Agency reported in 1996 and developed the estimation system of motor vehicle emissions. This estimation used the traffic volume rates of 24 hours against daytime which depends on vehicle types. Traffic volumes were calculated in each travel speed bands, while reflecting road types and roadside condition types. Emisson factors for heavy duty vehicles, light duty vehicles, special purpose vehicles and buses were reconsidered with the average vehicle kilometers and the equal inertia weights which were calculated for each gross vehicle weight category, while reflecting load efficiency and vehicle use categories (business or private). Annual emissions of NO<SUB>x</SUB> of Japan in fiscal year 1997 was 661kt and that of SPM was 66.4 kt. Calculated by this method, the annual CO<SUB>2</SUB> emission was 192Mt. It was equivalent to 81% of the CO<SUB>2</SUB> emission of 243 Mt calculated by fuel consumption statistics and emission factors. According to the estimation of 1994 by the Environmental Agency, the traffic-volume-base CO<SUB>2</SUB> emisson was equivalent to 70% of the fuel-consumption-base estimation. Though the estimated years of these estimations are different, it can be said that approximately 9 point improvement was accomplished by this estimation system.<BR>Estimation of freight vehicles was improved especially by reflecting the actual vehicle kilometers of super heavy vehicles for business use. On the other hand, it was shown that passenger cars require improvement on emission factors so as to reflect actual usage conditions.
- 社団法人 大気環境学会の論文
社団法人 大気環境学会 | 論文
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