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

Rakopoulos, CD; Dimaratos, AM; Giakoumis, EG; Rakopoulos, DC

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