Effect of exhaust gas recirculation (EGR) temperature for various EGR rates on heavy duty DI diesel engine performance and emissions

Hountalas, DT; Mavropoulos, GC; Binder, KB

dc.contributor.author	Hountalas, DT	en
dc.contributor.author	Mavropoulos, GC	en
dc.contributor.author	Binder, KB	en
dc.date.accessioned	2014-03-01T01:28:11Z
dc.date.available	2014-03-01T01:28:11Z
dc.date.issued	2008	en
dc.identifier.issn	0360-5442	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/18757
dc.subject	exhaust gas recirculation	en
dc.subject	diesel engine	en
dc.subject	EGR temperature	en
dc.subject	emissions	en
dc.subject.classification	Thermodynamics	en
dc.subject.classification	Energy & Fuels	en
dc.title	Effect of exhaust gas recirculation (EGR) temperature for various EGR rates on heavy duty DI diesel engine performance and emissions	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.energy.2007.07.002	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.energy.2007.07.002	en
heal.language	English	en
heal.publicationDate	2008	en
heal.abstract	DI diesel engines are well established today as the main powertrain solution for trucks and other relevant heavy duty vehicles. At the same time emission legislation (mainly for NO, and particulate matter) becomes stricter, reducing their limit to extremely low values. One efficient method to control NO, in order to achieve future emissions limits is the use of rather high exhaust gas recirculation (EGR) rates accompanied by increased boost pressure to avoid the negative impact on soot emissions. The method is based on the reduction of gas temperature level and O-2 availability inside the combustion chamber, but unfortunately it has usually an adverse effect on soot emissions and brake specific fuel consumption (bsfc). The use of high EGR rates creates the need for EGR gas cooling in order to minimize its negative impact on soot emissions especially at high engine load were the EGR flow rate and exhaust temperature are high. For this reason in the present paper it is examined, using a multi-zone combustion model, the effect of cooled EGR gas temperature level for various EGR percentages on performance and emissions of a turbocharged DI heavy duty diesel engine operating at full load. Results reveal that the decrease of EGR gas temperature has a positive effect on bsfc, soot (lower values) while it has only a small positive effect on NO. As revealed, the effect of low EGR temperature is stronger at high EGR rates. (C) 2007 Elsevier Ltd. All rights reserved.	en
heal.publisher	PERGAMON-ELSEVIER SCIENCE LTD	en
heal.journalName	ENERGY	en
dc.identifier.doi	10.1016/j.energy.2007.07.002	en
dc.identifier.isi	ISI:000253574700021	en
dc.identifier.volume	33	en
dc.identifier.issue	2	en
dc.identifier.spage	272	en
dc.identifier.epage	283	en