Improvement of Combustion Characteristics of Jatropha Curcas Oil by Water Emulsification -Combustion Analysis in Pre-Combustion Chamber Type Diesel Engine

Miyawaki, Naoya; Dan, Tomohisa; Hashimoto, Masataka; Asano, Ichiro

doi:10.5988/jime.46.752

Cited by 3 publications

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“…A durability aspect of water emulsion, authors have examined a combustion state of Jatropha water emulsion fuel in a pre-combustion chamber type diesel engine. As the result, it was obtained that the water emulsion case can reduce drastically the carbon deposit on the nozzle surface [25]. Recently, Jatropha methyl ester emulsified with wood pyrolysis oil was tested and its benefit was observed [26].…”

Section: Introductionmentioning

confidence: 97%

Effect of double injection on combustion, performance and emissions of Jatropha water emulsion fueled direct-injection diesel engine

Nguyen

Dan

Asano

2015

Energy

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a b s t r a c tThe experimental study was carried out using a four-stroke, high speed, DI (direct-injection) diesel engine with double fuel injections. In this study, Jatropha water emulsion was made by mixing a mass ratio of 10% of water. While fixing the first injection timing, we tested the engine on JWE (Jatropha water emulsion) with various injection timings and quantities of second injections. The acquired data was analyzed for various combustion parameters such as heat release rate, combustion center (timing of 50% of total heat release), ignition delay, and combustion duration; for performance parameters such as incylinder temperature, exhaust gas temperature, brake thermal efficiency; and emissions of CO (carbon monoxide), CO 2 (carbon dioxide), HC (hydrocarbons), NOx (nitrogen oxides), as well as dust and smoke opacity. When using a large second injection amount, we found a significant reduction in the peaks of the in-cylinder pressure, HRR (heat release rate), and average in-cylinder temperatures. We also found a drastic increase in the ignition delay, combustion duration, and a shift in the combustion center toward the later combustion stage, as well as increased exhaust gas temperatures, and reduced brake thermal efficiency compared with those of the Light oil. A large second injection amount reduced NOx emissions up to 48%, and drastically reduced HC emissions at higher loads of the engine.

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Section: Introductionmentioning

confidence: 97%

Effect of double injection on combustion, performance and emissions of Jatropha water emulsion fueled direct-injection diesel engine

Nguyen

Dan

Asano

2015

Energy

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Effect of dispersed water droplet diameter in light oil-water emulsion fuel on diesel engine operating performance

Tentora

Fuchihata

2019

Transactions of the JSME (In Japanese)

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In recent years, NOx and soot contained in the exhaust gas of diesel engines become problems. Currently they are elutriated by exhaust gas aftertreatment devices, which make the engine system more complicated. Therefore, we focused on emulsion fuel, which is known as one of the simultaneous reduction technology of NOx and soot. Although emulsion fuels are generally characterized by its water content, some literatures report that the effect on the diesel engine performance could not be controlled by the water content properly. Therefore, we focused on dispersed water droplet diameter as the other factor. In this study, we prepared emulsion fuels of different water droplet diameters and investigated the exhaust gas and power performance of a diesel engine with these fuels. The emulsion fuels consist of light oil, water and surfactant. We added 2.0 vol% of surfactant whose HLB value was adjusted to 6.0 to light oil. The water content was 10 and 15 vol%. We prepared emulsion fuels of three different mean dispersed water droplet diameters. The test fuel was 6 types of emulsion fuel (3 kinds of dispersed water droplet diameter, water content 10 and 15 vol%) and light oil. The diesel engine used in our experiment was of air-cooled, single-cylinder, jerk pump driven direct injection type. The displacement is 320 cc. We measured in-cylinder pressure, ignition delay, exhaust gas emission (NOx, Soot and CO) and power performance (Output power and Thermal efficiency). We found a relationship between the Sauter Mean Diameter of dispersed water droplets (D S.M.D. ) and each parameter. The smaller D S.M.D. is, the more the NOx and soot are reduced. On the other hand, the bigger D S.M.D. is, the higher the output and thermal efficiency are.

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Combustion and Emission Characteristics of Emulsified Biofuel Used for Diesel Engines

Nishio¹,

Fukuda²

2020

Journal of The Japan Institute of Marine Engineering

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Improvement of Combustion Characteristics of Jatropha Curcas Oil by Water Emulsification -Combustion Analysis in Pre-Combustion Chamber Type Diesel Engine

Cited by 3 publications

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Effect of double injection on combustion, performance and emissions of Jatropha water emulsion fueled direct-injection diesel engine

Effect of double injection on combustion, performance and emissions of Jatropha water emulsion fueled direct-injection diesel engine

Effect of dispersed water droplet diameter in light oil-water emulsion fuel on diesel engine operating performance

Combustion and Emission Characteristics of Emulsified Biofuel Used for Diesel Engines

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