Measuring the Performance and the Environmental Effects of Four-Stroke Diesel Engines Operated on the Same Plant Oil Methylester Mixtures in Two Laboratories

Savvidis, Dimitrios; Grammatikis, Vassilios; Triandafyllis, John; Pecqueur, M.; Vosniakos, Fokion

doi:10.4271/2007-01-2022

Cited by 6 publications

(4 citation statements)

References 8 publications

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“…Mazumdar and Agarwal 24 observed that NO x increased with increased concentration of biodiesel in the blends. Nabi et al, 2 Rakopoulos et al 3 and Savvidis et al 7 also reported increase in NO x emissions up on use of CME in different displacement CI engines. Capareda et al, 6 however, reported reduction of 14% NO x emissions from CME in a 14.2 kW engine.…”

Section: Exhaust Emissionsmentioning

confidence: 93%

“…Reduction in PM with use of CME blends has also been reported in earlier studies. 2,3,7,8 NO x and PM formation mechanism using CME compared to mineral diesel are discussed in detail later in this paper.…”

Section: Exhaust Emissionsmentioning

confidence: 99%

“…Factors affecting NO x emissions from the biodiesel fueled CI engine are (a) SOI, (b) global air–fuel equivalence ratio, (c) temperature of the inlet air, (d) timing and magnitude of maximum in-cylinder temperatures, (e) ignition delay, and (e) structure of the biodiesel molecule, unsaturation level/iodine number, etc. 6,7,25,29 The NO x emissions are predominantly affected by the timing of the start of combustion process, which in turn is governed by SOI, the timing of maximum in-cylinder gas temperature and the timing of maximum heat-release rate. The dependence of BSNO x emissions on these factors is shown for diesel, biodiesel and blends in Figure 11.…”

Section: Exhaust Emissionsmentioning

confidence: 99%

“…Capareda et al 6 carried out performance and emission tests with CME in a 14.2 kW diesel engine and showed reduction in THC, NO x and SO 2 emissions and increase in CO emissions compared to mineral diesel. Savvidis et al 7 converted cottonseed oil and frying oil to biodiesel and prepared B10, B20, B30, B40, B50 and B100 blends. These blends were used in two cars: Volvo V70 2.5 l turbo diesel and Ford Transit 2.5 l diesel.…”

Section: Introductionmentioning

confidence: 99%

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Experimental investigations of comparative performance, emission and combustion characteristics of a cottonseed biodiesel-fueled four-stroke locomotive diesel engine

Gautam

Agarwal

2012

International Journal of Engine Research

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A large-bore, four-stroke, medium-speed, compression-ignition railway traction locomotive engine was fueled with cottonseed methyl ester (Biodiesel). The cottonseed methyl ester was stored for 6 months under ordinary storage conditions, and various fuel properties of this seasoned cottonseed methyl ester were evaluated. Various blends of cottonseed methyl ester (B10, B20, B50 and cottonseed methyl ester) were evaluated for engine performance, emissions and combustion characteristics of the locomotive engine compared to baseline diesel. Correlation of the fuel-injection performance parameters with the physical properties of biodiesel has been carried out. The engine was able to operate on cottonseed methyl ester without noticeable power loss. With cottonseed methyl ester, the thermal efficiency decreased marginally by 0.7% and the brake-specific energy consumption increased by 0.1 MJ/kWh at the rated power. Due to the lower calorific value of biodiesel, brake specific fuel consumption (BSFC) increased by 13.4% at eighth engine notch, nitrogen oxide emissions increased by 8% and particulate matter emissions decreased by 32% vis-a-vis mineral diesel. Nitrogen oxide emissions were found to be a function of injection timings, global oxygen/carbon ratios, time of the maximum mean in-cylinder temperatures and apparent heat release. Particulate matter emissions were found to depend on the air–fuel mixture’s oxygen/carbon ratio, fuel bound oxygen and fuel-injection pressure. The experiments were carried out to evaluate the in-cylinder pressure, heat-release rate, cumulative heat release, fuel-injection pressure, needle lift and fuel-injection velocities. Increased fuel-injection pressures (1000 bar compared to 900 bar for mineral diesel), advanced fuel-injection timings, shorter combustion duration, advanced in-cylinder pressures and higher heat-release rates were observed for biodiesel and blends. The findings of the present study have provided further insights into the combustion of biodiesel in locomotive engines.

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