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The effects on performance, combustion and emission characteristics of DICI engine fuelled with TiO2 nanoparticles addition in diesel/biodiesel/n-butanol blends
Scopus
Toplam 229 atıf DOI
In this study, waste cooking oil biodiesel was mixed with titanium dioxide (TiO2), a metal-based nano particle, and n-butanol (C4H9OH) along with euro diesel to examine their effects on diesel engines. Various ratio of fuel blends were prepared with TiO2 nano particles-diesel-biodiesel and n-butanol. The tests fuels were euro diesel (D100), biodiesel (B100), B20, B20 + TiO2, B20But10 and B20But10 + TiO2, respectively. Thermo-physical properties such as density, pour point, cloud point, cold filter clogging point, flash point and kinematic viscosity of all test fuels were determined followed by investigating engine performance parameters such as torque, power, fuel consumption and etc. Combustion analysis was also investigated. In addition, the effects on emissions such as CO, CO2, HC, NO and smoke opacity were also carried out. The addition of n-butanol to the fuel blends substantially affected density, kinematic viscosity and cold flow properties, while the addition of TiO2 has not much effect on these properties. For all tested fuels, the maximum brake engine torque and power were recorded at approximately 1400 rpm and 2800 rpm, respectively. The addition of TiO2 increased the brake engine torque and power 10.20% and 9.74% and decreased the brake specific fuel consumption 27.73% and 28.37%, respectively compared to blends without TiO2 additive. TiO2 additive increases the maximum cylinder pressure and heat release rate, as a result improved the engine performance and combustion. The addition of n-butanol in the fuel blend increased the maximum cylinder pressure and heat release rate values in comparison to euro diesel. The results of exhaust emission showed a decrease in CO, HC and smoke opacity emissions, whereas increased CO2 and NO emission, except the use of n-butanol reduced the values of NO emission, in comparison to euro diesel and without TiO2 additive. The results show that biodiesel produced from waste cooking oil, n-butanol and TiO2 additive can be used in diesel engines at certain proportion and that the additive materials improve the combustion characteristics, engine performance and exhaust gas emission.
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Effect of methane injection strategy on combustion, exergetic performance, and enviro-economic analyses in a diesel/methane CRDI engine
Scopus
Havuzumuzda 16 atıf almış
To assess the applicability of methane gas in the context of a methane injection strategy in dual fuel concept, it is crucial to evaluate not only the engine performance but also the exergetic performance and the enviro-economic analyses. In this experimental study, a comprehensive investigation was performed to explore the impacts of a methane injection strategy, involving the timing and quantity of methane gas injection, on the combustion and emission characteristics of a diesel/methane dual-fuel operation. Also, an assessment of energy, exergy, environmental impact, and cost analyses on methane injection strategy using data obtained from experimental results was performed. In the literature, there is a deficiency regarding the evaluation of methane injection strategy in terms of energy, exergy, and enviro-economic analyses. This study will not only address the current research gaps but also serve as a reference for future investigations. The experiments were conducted on a single-cylinder, air-cooled, diesel engine with a common rail fuel system, operating at a fixed engine speed and load. In the experiments, methane injection timing (MIT) was advanced from 20 CAD aTDC to 60 CAD aTDC in 10 CAD increments. The methane injection duration (MID) was increased from 2 ms to 4 ms in 0.5 ms increments. The results have demonstrated that delaying the MIT increases combustion stability compared to early MIT and shortens ignition delay time. High HC and CO emissions resulting from early MIT have been reduced by up to 26 % and 19 %, respectively, with the delay of MIT. Through the delayed MIT application, the diesel/methane study yielded higher exergetic efficiency, lower exergy destruction, and entropy generation compared to the only-diesel operation. Additionally, lower environmental impact and cost values were obtained due to combustion at lower temperatures compared to diesel.
Atıf Yapan Makale Bilgileri
Kurumlar (1)
Selçuk Üniversitesi
Selçuklu, Turkey