ANALYSIS OF COMBUSTION-CHAMBER INSULATION EFFECTS ON THE PERFORMANCE AND EXHAUST EMISSIONS OF A DI-DIESEL-ENGINE USING A MULTIZONE MODEL

RAKOPOULOS, CD; TAKLIS, GN; TZANOS, EI

dc.contributor.author	RAKOPOULOS, CD	en
dc.contributor.author	TAKLIS, GN	en
dc.contributor.author	TZANOS, EI	en
dc.date.accessioned	2014-03-01T01:10:49Z
dc.date.available	2014-03-01T01:10:49Z
dc.date.issued	1995	en
dc.identifier.issn	0890-4332	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/11455
dc.subject	Diesel Engine	en
dc.subject	Exhaust Emissions	en
dc.subject	Heat Loss	en
dc.subject	Direct Injection	en
dc.subject.classification	Thermodynamics	en
dc.subject.classification	Energy & Fuels	en
dc.subject.classification	Engineering, Mechanical	en
dc.subject.classification	Mechanics	en
dc.title	ANALYSIS OF COMBUSTION-CHAMBER INSULATION EFFECTS ON THE PERFORMANCE AND EXHAUST EMISSIONS OF A DI-DIESEL-ENGINE USING A MULTIZONE MODEL	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/0890-4332(95)90048-9	en
heal.identifier.secondary	http://dx.doi.org/10.1016/0890-4332(95)90048-9	en
heal.language	English	en
heal.publicationDate	1995	en
heal.abstract	A comprehensive two-dimensional multi-zone model of a diesel engine cycle is presented in this study, in order to examine the influence of insulating the combustion chamber on the performance and exhaust pollutants emissions of a naturally-aspirated, direct injection (DI), four-stroke, water-cooled diesel engine. The heat insulation is taken into account by the corresponding rise of wall temperature, since this is the final result of insulation useful for the study. It is found that there is no remarkable improvement of engine efficiency, since the decrease of volumetric efficiency has a greater influence on it than the decrease of heat loss to the coolant, which is converted mainly to exhaust gas enthalpy (significant rise of the exhaust gas temperature). As far as the concentration of exhaust pollutant emissions is concerned, it is found that the rising heat insulation leads to a significant increase of the exhaust nitric oxide (NO) and to a moderate increase of the exhaust soot concentration. Plots of temperature, equivalence ratio, NO and soot distributions at various instants of time inside the combustion chamber, emanating from the application of the multi-zone model, aid the correct interpretation of the insulation effects gaining insight into the underlying mechanisms involved.	en
heal.publisher	PERGAMON-ELSEVIER SCIENCE LTD	en
heal.journalName	HEAT RECOVERY SYSTEMS & CHP	en
dc.identifier.doi	10.1016/0890-4332(95)90048-9	en
dc.identifier.isi	ISI:A1995RL50700009	en
dc.identifier.volume	15	en
dc.identifier.issue	7	en
dc.identifier.spage	691	en
dc.identifier.epage	706	en