Investigation of the combustion of neat cottonseed oil or its neat bio-diesel in a HSDI diesel engine by experimental heat release and statistical analyses

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

dc.contributor.author	Rakopoulos, CD	en
dc.contributor.author	Rakopoulos, DC	en
dc.contributor.author	Giakoumis, EG	en
dc.contributor.author	Dimaratos, AM	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	0016-2361	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/20523
dc.subject	High speed DI diesel	en
dc.subject	Combustion Neat cottonseed oil	en
dc.subject	Neat bio-diesel	en
dc.subject	Heat release and statistical analyses	en
dc.subject.classification	Energy & Fuels	en
dc.subject.classification	Engineering, Chemical	en
dc.subject.other	FUEL BLENDS	en
dc.subject.other	VEGETABLE-OILS	en
dc.subject.other	EXHAUST EMISSIONS	en
dc.subject.other	METHYL-ESTER	en
dc.subject.other	PERFORMANCE	en
dc.subject.other	SUNFLOWER	en
dc.subject.other	MIXTURES	en
dc.title	Investigation of the combustion of neat cottonseed oil or its neat bio-diesel in a HSDI diesel engine by experimental heat release and statistical analyses	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.fuel.2010.07.012	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.fuel.2010.07.012	en
heal.language	English	en
heal.publicationDate	2010	en
heal.abstract	An experimental study is conducted to evaluate the effects of using neat cottonseed oil or its neat ME (methyl ester) bio-diesel, on the combustion behavior of a standard, high speed, direct injection (HSDI), 'Hydra' diesel engine located at the authors' laboratory. Combustion chamber and fuel injection pressure diagrams are obtained at medium and high load using a developed, high-speed, data acquisition and processing system. A heat release analysis of the experimentally obtained cylinder pressure diagrams is developed and used. Plots of histories in the combustion chamber of the heat release rate and other related parameters reveal some interesting features, which shed light into the combustion mechanism when using these bio-fuels. These results, combined with the differing physical and chemical properties of the bio-fuels between themselves and against those for the diesel fuel, which constitutes the baseline fuel, aid the correct interpretation of the observed engine behavior performance-and emissions-wise. Moreover, the possible existence of cyclic (combustion) variability is examined as reflected in the pressure indicator diagrams, by analyzing for the maximum pressure and its rate, and the dynamic injection timing and ignition delay, by using statistical analysis for averages, standard deviations and probability density functions. The key results are that with the use of these bio-fuels against the neat diesel fuel case, the ignition delay is hardly affected, the fuel injection pressure diagrams are very slightly advanced accompanied with higher injection pressures, maximum cylinder pressures remain the same with the vegetable oil and slightly increased with the bio-diesel, maximum cylinder pressure rates are increased with the bio-diesel and decreased with the vegetable oil, while the cyclic irregularity is not affected with these bio-fuels remaining at the acceptable neat diesel fuel case levels. (C) 2010 Elsevier Ltd. All rights reserved.	en
heal.publisher	ELSEVIER SCI LTD	en
heal.journalName	FUEL	en
dc.identifier.doi	10.1016/j.fuel.2010.07.012	en
dc.identifier.isi	ISI:000282086200026	en
dc.identifier.volume	89	en
dc.identifier.issue	12	en
dc.identifier.spage	3814	en
dc.identifier.epage	3826	en