Effects of diesel/water emulsion on heat flow and thermal loading in a precombustion chamber diesel engine

Selim, Mohamed Y. E.; Elfeky, S.M.S.

doi:10.1016/s1359-4311(01)00019-9

Cited by 62 publications

(31 citation statements)

References 14 publications

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“…There are three main methods that are used to introduce water into a diesel engine. These are direct water injection into the cylinder using separate injector, injecting water/diesel emulsion and spraying/injecting water into the intake manifold [33,34].…”

Section: Water Injection/emulsionmentioning

confidence: 99%

Water injection effects on the performance and emission characteristics of a CI engine operating with biodiesel

et al. 2012

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Biodiesel is one of the most promising renewable, alternative and environmentally friendly biofuels that can be used in diesel engine without any need for any modification in the engine. However, researchers have reported that the engines running with biodiesel emit NOx in higher concentrations. To address this problem, in the present study an experimental investigation has been carried out on the combustion, performance and emission characteristics of a compression ignition (CI) engine running with biodiesel under steady state conditions with a novel NOx reducing mechanism involving a water injections system. The experimental work has been conducted on a four-cylinder, fourstroke, direct injection (DI) as well as turbocharged diesel engine. In this investigation, biodiesel (produced from the rapeseed oil by transesterfication process) has been used.During the experiments the in-cylinder pressure, specific fuel consumption, water injection flow rate, fuel flow rate and exhaust emission (NOx, CO, CO 2 and THC) were measured. The experimental results clearly indicate that water injection at a rate of 3kg/h results in the reduction of NOx emission by about 50% without causing any significant change in the specific fuel consumption. Furthermore, the water injection in the intake manifold has little effect on the in-cylinder pressure and heat release rate of the CI engine under different operating conditions. 2

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Section: Water Injection/emulsionmentioning

confidence: 99%

Water injection effects on the performance and emission characteristics of a CI engine operating with biodiesel

et al. 2012

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“…Water has influence on reducing the peak flame temperature and lead to the reduction of NO x emission [2][3][4]. The presences of water may assist in fuel atomization due to microexplosion, which occur during the evaporation of the water inside droplets of fuel.…”

Section: Introductionmentioning

confidence: 99%

“…The presences of water may assist in fuel atomization due to microexplosion, which occur during the evaporation of the water inside droplets of fuel. These phenomenon lead to the complete combustion and hence improve the combustion efficiency [2][3][4]. There is also considerable evidence that introduction of water into diesel can helps reduction in the particulate matter emission [4].…”

Section: Introductionmentioning

confidence: 99%

“…These phenomenon lead to the complete combustion and hence improve the combustion efficiency [2][3][4]. There is also considerable evidence that introduction of water into diesel can helps reduction in the particulate matter emission [4]. Most important aspect is that diesel emulsions can be used without engine modifications [5].…”

Section: Introductionmentioning

confidence: 99%

“…Among these three methods, it has been concluded that water-diesel emulsion was the most effective way for the reduction of diesel particulate, for four strokes DI engine [4]. Typically, introduction of water in the fuel is in the range of 10 to 20% [5].…”

Section: Introductionmentioning

confidence: 99%

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Effect of water content on partial ternary phase diagram water-in-diesel microemulsion fuel

Mukayat¹,

Badri²,

Raman³

et al. 2014

AIP Conference Proceedings

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Abstract. Introduction of water in the fuel gave a significant effect to the reduction of pollutant such as NO x emission. In this work, water/diesel microemulsion fuels were prepared using compositional method by mixing water and diesel in the presence of non-ionic surfactant and co-surfactant. The effects of water composition on the partial ternary phase diagram were studied at 5%, 10%, 15% and 20% (w/w). The physical stability of the microemulsion was investigated at 45°C over a period of one month. The optimum formulae obtained were diesel/T80/1-penthanol/water 60:20:15:5 wt% (System 1), 55:20:15:10 wt% (System 2), 50:20:15:15 wt% (System 3) and 45:20:15:20 wt% (System 4). Physicochemical characterizations of optimum formulae were studied. The results showed that water content has a significant effect to the formation of microemulsion, its stability, droplet size and viscosity.

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Effective efficiency and power density analysis for WiDE as a fuel in diesel engine performance

Kumar

Sahoo

2019

Heat Trans. Asian Res.

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A comparative theoretical performance analysis for diesel, 5% water in diesel emulsion (WiDE), and 10% WiDE as fuels in a single-cylinder diesel engine is presented here.Variations in engine performance parameters such as effective power density (EPD), effective power (EP), and effective efficiency (EE), along with compression ratio and equivalence ratio, have been analyzed on the basis of isobaric heat addition and isochoric heat rejection assumptions. Also, friction loss, exhaust loss, and total loss occurring in engines with the above-mentioned fuels have been discussed. Theoretical analysis revealed that in a diesel engine with compression ratio 18, the EP and power density increased by 28.6% and 30.45%, respectively, for diesel fuel compared with 10% WiDE fuel. The optimum cycle temperature ratio, EP, and power density were obtained with an equivalence ratio of 1.2 and the optimum EE with an equivalence ratio of 0.89 for diesel, 5% WiDE, and 10% WiDE fuels.However, the maximum exhaust loss and the minimum incomplete combustion losses were obtained with an equivalence ratio of 1.2 and 0.8, respectively. At an equivalence ratio of 1.2, diesel fuel had a higher exhaust loss of 9.25% and 27.21% and heat loss of 5.39% and 11.8%, respectively, compared with 5% WiDE and 10% WiDE fuels. Thus, the fuel consumption rate with diesel as fuel was higher, followed by 5% WiDE and 10% WiDE fuels for diesel engine performance.

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Effects of diesel/water emulsion on heat flow and thermal loading in a precombustion chamber diesel engine

Cited by 62 publications

References 14 publications

Water injection effects on the performance and emission characteristics of a CI engine operating with biodiesel

Water injection effects on the performance and emission characteristics of a CI engine operating with biodiesel

Effect of water content on partial ternary phase diagram water-in-diesel microemulsion fuel

Effective efficiency and power density analysis for WiDE as a fuel in diesel engine performance

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