Comparative evaluation of the effect of intake charge temperature, pilot fuel quantity and injection advance on dual fuel compression ignition engine performance characteristics and emitted pollutants

Papagiannakis, RG; Zannis, TC; Yfantis, EA; Hountalas, DT

dc.contributor.author	Papagiannakis, RG	en
dc.contributor.author	Zannis, TC	en
dc.contributor.author	Yfantis, EA	en
dc.contributor.author	Hountalas, DT	en
dc.date.accessioned	2014-03-01T02:52:37Z
dc.date.available	2014-03-01T02:52:37Z
dc.date.issued	2010	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/35954
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-77954251412&partnerID=40&md5=9670379ef968907c148e78998d81526c	en
dc.subject.other	Air inlet temperature	en
dc.subject.other	Autoignition temperature	en
dc.subject.other	Carbon monoxide emissions	en
dc.subject.other	Combustion mechanism	en
dc.subject.other	Combustion pro-cess	en
dc.subject.other	Comparative assessment	en
dc.subject.other	Comparative evaluations	en
dc.subject.other	Compression ignition	en
dc.subject.other	Compression ignition engine	en
dc.subject.other	Compression stroke	en
dc.subject.other	Conventional fuel	en
dc.subject.other	Design factors	en
dc.subject.other	DI diesel engine	en
dc.subject.other	Dual fuel combustion	en
dc.subject.other	Dual-fuels	en
dc.subject.other	Engine efficiency	en
dc.subject.other	Engine load	en
dc.subject.other	Engine operating conditions	en
dc.subject.other	Engine parameter	en
dc.subject.other	Engine performance	en
dc.subject.other	Engine power output	en
dc.subject.other	Engine speed	en
dc.subject.other	Exhaust aftertreatment	en
dc.subject.other	Exhaust emission	en
dc.subject.other	Gaseous Fuel	en
dc.subject.other	Gaseous fuel mixtures	en
dc.subject.other	High speed direct injections	en
dc.subject.other	High-speed	en
dc.subject.other	Ignition source	en
dc.subject.other	Injection timing	en
dc.subject.other	Intake charge temperature	en
dc.subject.other	Negative impacts	en
dc.subject.other	Nitrogen oxide emissions	en
dc.subject.other	Numerical simulation	en
dc.subject.other	Operating modes	en
dc.subject.other	Optimum combination	en
dc.subject.other	Part load conditions	en
dc.subject.other	Particulate Matter	en
dc.subject.other	Phenomenological models	en
dc.subject.other	Pilot diesel	en
dc.subject.other	Pilot fuel quantity	en
dc.subject.other	Pollutant emission	en
dc.subject.other	Primary fuels	en
dc.subject.other	Relative impact	en
dc.subject.other	Research studies	en
dc.subject.other	Simultaneous reduction	en
dc.subject.other	Soot emissions	en
dc.subject.other	Theoretical investigations	en
dc.subject.other	Trade off	en
dc.subject.other	Calorific value	en
dc.subject.other	Carbon monoxide	en
dc.subject.other	Combustion chambers	en
dc.subject.other	Computer simulation	en
dc.subject.other	Diesel engines	en
dc.subject.other	Diesel fuels	en
dc.subject.other	Fuel purification	en
dc.subject.other	Gas emissions	en
dc.subject.other	Gas engines	en
dc.subject.other	Ignition	en
dc.subject.other	Machine design	en
dc.subject.other	Mechanical engineering	en
dc.subject.other	Natural gas	en
dc.subject.other	Nitric oxide	en
dc.subject.other	Nitrogen oxides	en
dc.subject.other	Particulate emissions	en
dc.subject.other	Speed	en
dc.subject.other	Dual fuel engines	en
dc.title	Comparative evaluation of the effect of intake charge temperature, pilot fuel quantity and injection advance on dual fuel compression ignition engine performance characteristics and emitted pollutants	en
heal.type	conferenceItem	en
heal.publicationDate	2010	en
heal.abstract	The simultaneous reduction of nitrogen oxide emissions and particulate matter in a compression ignition environment is quite difficult due to the soot/NOx trade off and it is often accompanied by fuel consumption penalties. Thus, fuel reformulation is also essential for the curtailment of diesel pollutant emissions along with the optimization of combustionrelated design factors and exhaust after-treatment equipment. Various solutions have been proposed for improving the combustion process of conventional diesel engines and reducing the exhaust emissions without making serious modifications on the engine, one of which is the use of natural gas as a supplement for the conventional diesel fuel (Dual Fuel Natural Gas/Diesel Engines). Natural gas is considered to be quite promising since its cost is relative lower compared to conventional fuels and it has high auto-ignition temperature compared to other gaseous fuels facilitating thus its use on future and existing fleet of small high speed direct injection diesel engines without serious modifications on their structure. Moreover, natural gas does not generate particulates when burned in engines. The most common natural gas/diesel operating mode is referred to as the Pilot Ignited Natural Gas Diesel Engine (P.I.N.G.D.E). Here, the primary fuel is natural gas that controls the engine power output, while the pilot diesel fuel injected near the end of the compression stroke autoignites and creates ignition sources for the surrounding gaseous fuel mixture to be burned. Previous research studies have shown that the main disadvantage of this dual fuel combustion is its negative impact on engine efficiency compared to the normal diesel operation, while carbon monoxide emissions are also increased. The specific engine operating mode, in comparison with conventional diesel fuel operation, suffers from low brake engine efficiency and high carbon monoxide (CO) emissions. The influence becomes more evident at part load conditions. Intake charge temperature, pilot fuel quantity and injection advance are some of the engine parameters which influence significantly the combustion mechanism inside the combustion chamber of a Pilot Ignited Natural Gas Diesel Engine. In order to be examined the effect of these parameters on performance and exhaust emissions of a natural gas/diesel engine a theoretical investigation has been conducted by using a numerical simulation. In order to be examined the effect of increased air inlet temperature combined with increased pilot fuel quantity and its injection timing on performance and exhaust emissions of a pilot ignited natural gas-diesel engine, a theoretical investigation has been conducted by using a comprehensive two-zone phenomenological model. The results concerning engine performance characteristics and NO, CO and Soot emissions for various engine operating conditions (i.e. load and engine speed), comes from the employment of a comprehensive twozone phenomenological model which had been applied on a high-speed natural gas/diesel engine. The main objectives of this comparative assessment are to record and to comparatively evaluate the relative impact each one of the above mentioned parameters on engine performance characteristics and emitted pollutants. Furthermore, the present investigation deals with the determining of optimum combinations between the parameters referred before since at high engine load conditions, the simultaneous increase some of the specific parameters may lead in undesirable results about engine performance characteristics. The conclusions of the specific investigation will be extremely valuable for the application of this technology on existing DI diesel engines. Copyright © 2010 by ASME.	en
heal.journalName	ASME International Mechanical Engineering Congress and Exposition, Proceedings	en
dc.identifier.volume	3	en
dc.identifier.spage	287	en
dc.identifier.epage	296	en