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Investigating the emissions during acceleration of a turbocharged diesel engine operating with bio-diesel or n-butanol diesel fuel blends

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dc.contributor.author Rakopoulos, CD en
dc.contributor.author Dimaratos, AM en
dc.contributor.author Giakoumis, EG en
dc.contributor.author Rakopoulos, DC en
dc.date.accessioned 2014-03-01T01:33:40Z
dc.date.available 2014-03-01T01:33:40Z
dc.date.issued 2010 en
dc.identifier.issn 0360-5442 en
dc.identifier.uri https://dspace.lib.ntua.gr/xmlui/handle/123456789/20520
dc.subject Turbocharged diesel engine en
dc.subject Transient emissions en
dc.subject Bio-diesel en
dc.subject n-Butanol en
dc.subject Nitric oxide en
dc.subject Smoke opacity en
dc.subject.classification Thermodynamics en
dc.subject.classification Energy & Fuels en
dc.subject.other TRANSIENT OPERATION en
dc.subject.other BIODIESEL BLEND en
dc.subject.other VEGETABLE-OIL en
dc.subject.other PERFORMANCE en
dc.title Investigating the emissions during acceleration of a turbocharged diesel engine operating with bio-diesel or n-butanol diesel fuel blends en
heal.type journalArticle en
heal.identifier.primary 10.1016/j.energy.2010.07.049 en
heal.identifier.secondary http://dx.doi.org/10.1016/j.energy.2010.07.049 en
heal.language English en
heal.publicationDate 2010 en
heal.abstract Control of transient emissions from turbocharged diesel engines is an important objective for automotive manufacturers, since stringent criteria for exhaust emission levels must be met as dictated by the legislated transient cycles. On the other hand, bio-fuels are getting impetus today as renewable substitutes for conventional fuels (diesel fuel or gasoline), especially in the transport domain. In the present work, experimental tests are conducted on a turbocharged truck diesel engine in order to investigate the formation mechanism of NO (nitric oxide) and smoke under various accelerating schedules experienced during daily driving conditions. To this aim, a fully instrumented test bed was set up in order to capture the development of key engine and turbocharger variables during the transient events using ultra-fast response instrumentation for the instantaneous measurement of the exhaust NO and smoke opacity. Apart from the baseline diesel fuel, the engine was operated with a blend of diesel fuel with 30% bio-diesel, and a blend of diesel fuel with 25% n-butanol. Analytical diagrams are provided to explain the behavior of emissions development in conjunction with turbocharger and fueling response. Unsurprisingly, turbocharger lag was found to be the main culprit for the emissions spikes during all test cases examined. The differences in the measured exhaust emissions of the two bio-fuel/diesel fuel blends, both leading to serious smoke reductions but also NO increases compared with the baseline operation of the engine were determined and compared. The differing physical and chemical properties of bio-diesel and n-butanol against those of the diesel fuel, together with the formation mechanisms of NO and soot were used for the analysis and interpretation of the experimental findings concerning transient emissions. (C) 2010 Elsevier Ltd. All rights reserved. en
heal.publisher PERGAMON-ELSEVIER SCIENCE LTD en
heal.journalName ENERGY en
dc.identifier.doi 10.1016/j.energy.2010.07.049 en
dc.identifier.isi ISI:000286343000077 en
dc.identifier.volume 35 en
dc.identifier.issue 12 en
dc.identifier.spage 5173 en
dc.identifier.epage 5184 en


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