Ex-post decomposition analysis of passenger car energy demand and associated CO2 emissions

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dc.check.date2020-02-20
dc.check.infoAccess to this article is restricted until 24 months after publication by request of the publisher.en
dc.contributor.authorDennehy, Emer R.
dc.contributor.authorÓ Gallachóir, Brian P.
dc.contributor.funderScience Foundation Irelanden
dc.contributor.funderSustainable Energy Authority of Irelanden
dc.date.accessioned2019-11-14T12:58:13Z
dc.date.available2019-11-14T12:58:13Z
dc.date.issued2018-02-20
dc.date.updated2019-11-14T12:48:42Z
dc.description.abstractThis paper investigates, quantifies and ranks the factors influencing passenger cars energy demand and emissions. A vehicle stock-model approach is used for an ex-post decomposition analysis, based on administrative data, examining the impact seven underlying factors driving energy demand. The impact of methodological choice and model disaggregation are also explored. In light of the 2015 vehicle emissions scandal, the paper quantifies the difference between manufacturer-test vehicle performance and real world or â on-roadâ performance for a national stock model and determines the relative impact on passenger cars energy consumption. When examining the technical performance improvement, the choice of metric can lead to a distortion of 2.2 percentage points (14% overestimate) in the quantification of the efficiency improvement of the vehicle stock. The analysis pays particular attention to the influence of fuel or technology switching â which is often quoted as a factor influencing energy use and emissions but rarely quantified. Even when using litres per hundred-kilometre gasoline equivalent to measure the performance improvement, changes in the makeup of the stock can lead to distortion in the efficiency measure. The results of a full decomposition analysis highlight that technical performance improvements (energy efficiency improvements for the purpose of this paper), will not provide significant energy and emission savings when the impact on-road consumption is included. The paper concludes that technology switching in conjunction with policies targeting ownership and usage are the most effective measures to control passenger car energy consumption and associated CO2 emissions.en
dc.description.statusPeer revieweden
dc.description.versionAccepted Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationDennehy, E. R. and Ó Gallachóir, B. P. (2018) 'Ex-post decomposition analysis of passenger car energy demand and associated CO2 emissions', Transportation Research Part D: Transport And Environment, 59, pp. 400-416. doi: 10.1016/j.trd.2018.01.012en
dc.identifier.doi10.1016/j.trd.2018.01.012en
dc.identifier.eissn1879-2340
dc.identifier.endpage416en
dc.identifier.issn1361-9209
dc.identifier.journaltitleTransportation Research Part D: Transport And Environmenten
dc.identifier.startpage400en
dc.identifier.urihttps://hdl.handle.net/10468/9007
dc.identifier.volume59en
dc.language.isoenen
dc.publisherElsevier Ltd.en
dc.relation.projectinfo:eu-repo/grantAgreement/SFI/SFI Research Centres/12/RC/2302/IE/Marine Renewable Energy Ireland (MaREI) - The SFI Centre for Marine Renewable Energy Research/en
dc.relation.urihttp://www.sciencedirect.com/science/article/pii/S1361920917308052
dc.rights© 2018, Elsevier Ltd. All rights reserved. This manuscript version is made available under the CC BY-NC-ND 4.0 license.en
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/en
dc.subjectPassenger carsen
dc.subjectEnergy efficiencyen
dc.subjectFuel or technology switchingen
dc.subjectOn-road consumptionen
dc.subjectLMDI-Ien
dc.subjectDecomposition analysisen
dc.titleEx-post decomposition analysis of passenger car energy demand and associated CO2 emissionsen
dc.typeArticle (peer-reviewed)en
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