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Carbon dioxide emissions from diesel and compressed natural gas buses during acceleration

Jayaratne, Rohan, Ristovski, Zoran, Morawska, Lidia, & Meyer, Nickolas K. (2010) Carbon dioxide emissions from diesel and compressed natural gas buses during acceleration. Transportation Research Part D Transport and Environment, 15(5), pp. 247-253.

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Abstract

Motor vehicle emission factors are generally derived from driving tests mimicking steady state conditions or transient drive cycles. However, neither of these test conditions completely represents real world driving conditions. In particular, they fail to determine emissions generated during the accelerating phase – a condition in which urban buses spend much of their time. In this study we analyse and compare the results of time-dependant emission measurements conducted on diesel and compressed natural gas (CNG) buses during an urban driving cycle on a chassis dynamometer and we derive power-law expressions relating carbon dioxide (CO2) emission factors to the instantaneous speed while accelerating from rest. Emissions during acceleration are compared with that during steady speed operation. These results have important implications for emission modelling particularly under congested traffic conditions.

Impact and interest:

9 citations in Scopus
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5 citations in Web of Science®

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ID Code: 38675
Item Type: Journal Article
Keywords: Motor Vehicle Emissions, Carbon Dioxide, Greenhouse Gas Emissions, Traffic Congestion, Bus Emissions
DOI: 10.1016/j.trd.2010.03.005
Subjects: Australian and New Zealand Standard Research Classification > EARTH SCIENCES (040000) > ATMOSPHERIC SCIENCES (040100) > Atmospheric Aerosols (040101)
Australian and New Zealand Standard Research Classification > EARTH SCIENCES (040000) > ATMOSPHERIC SCIENCES (040100) > Atmospheric Sciences not elsewhere classified (040199)
Divisions: Past > QUT Faculties & Divisions > Faculty of Science and Technology
Current > Institutes > Institute of Health and Biomedical Innovation
Past > Schools > Physics
Copyright Owner: Copyright 2010 Elsevier
Deposited On: 19 Nov 2010 10:02
Last Modified: 01 Mar 2012 00:14

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