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

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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


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