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.
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.
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|Item Type:||Journal Article|
|Keywords:||Motor Vehicle Emissions, Carbon Dioxide, Greenhouse Gas Emissions, Traffic Congestion, Bus Emissions|
|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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