Kurumun Atıf Alan Makalesi
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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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Atıf Yapan Yayın
Experimental investigation of the effect of variable valve lift on combustion stability and exhaust emissions in a diesel/methane CRDI engine
Scopus
Havuzumuzda 6 atıf almış
Diesel/methane combustion still encounters challenges in terms of lower combustion stability and elevated levels of HC and CO emissions. The valve lift (VL) technique is a method that contributes to increased in-cylinder volumetric efficiency, thereby improving engine performance and reducing emissions. Hence, the application of VL in diesel/methane operations would be highly significant. Therefore, an experimental study on the VL for reducing HC and CO emissions and enhancing combustion stability in a diesel/methane CRDI engine was performed at varying methane fractions and torques. In the study, three different cam profiles were used with VL extrapolated using Fourier series and designed: the original VL of 4.46 mm, as well as two different VLs of 4.0 mm and 4.9 mm. The methane in the total fuel energy was initially increased to 20 % and later further increased to 40 %. The experimental findings demonstrated that the augmented VL mitigated the prolonged ignition delay caused by the increase of methane fraction, thereby ensuring enhanced combustion stability across all torques. On the other hand, in diesel/methane operation, increasing the VL resulted in maximum reductions of approximately 17 % in HC, 6 % in CO emissions, and 75 % in smoke opacity.
Atıf Yapan Makale Bilgileri
Kurumlar (2)
Selçuk Üniversitesi
Selçuklu, Turkey
Technical Sciences Vocational School
Karaman, Turkey