Impact of various metal-oxide based nanoparticles and biodiesel blends on the combustion, performance, emission, vibration and noise characteristics of a CI engine

Ağbulut, Ümit; Karagöz, Mustafa; Sarıdemir, Suat; Öztürk, Ahmet

doi:10.1016/j.fuel.2020.117521

Cited by 244 publications

(64 citation statements)

References 47 publications

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“…The Al 2 O 3 -water and TiO 2 -water nanofluids were prepared using the two-step method. In this regard, the particles with the size of 20 nm were dispersed in distilled water and placed in the ultrasonic bath (vCLEAN-L27, 500 W, Backer Viera Trading Company, Iran) about 4 h at 40 kHz frequency to be stabilized properly [34,35]. All the suspensions were poured into test containers and allowed to deposit for a few days.…”

Section: Nanofluid Preparationmentioning

confidence: 99%

Experimental investigation of heat transfer and pressure drop in a minichannel heat sink using Al2O3 and TiO2–water nanofluids

Moghanlou

Noorzadeh

Ataei

et al. 2020

J Braz. Soc. Mech. Sci. Eng.

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Nanofluids are known as a new generation of coolants. These fluids have attracted more attention in cooling applications, like electrical, optical, and solar systems recently, because of their unique rheological and thermal properties. In the present study, to evaluate the thermal behavior of the nanofluids, Al 2 O 3 and TiO 2 nanoparticles with the size of 20 nm were completely dispersed in distilled water and circulated in a minichannel heat sink. The heat sink consists of 10 minichannels that have designed to cool thermoelectric generators. The results showed that by only dispersion of 0.5 vol% Al 2 O 3 nanoparticles a 9.30% heat transfer enhancement observed. It was also obtained that the TiO 2-water sample showed a 4.56% heat transfer enhancement. The highest efficiency was obtained by utilizing the Al 2 O 3-water nanofluid. This was attributed to the higher thermal conductivity of Al 2 O 3 compared to TiO 2. Using both nanofluids resulted in higher pressure drop compared to the based fluid. At the Reynolds number of 1000, the pressure drop for Al 2 O 3 and TiO 2 nanofluids increased as 3.33% and 3.88%, respectively. The increased pressure drop was attributed to higher density and viscosity of nanofluids. The classical theories are not available to justify the remarkable heat transfer enhancement obtained by adding a negligible amount of mentioned nanoparticles. It seems that new mechanisms such as the random motion of nanoparticles and generated microconvections by nanoparticle motion in the base fluid are responsible for considerable heat transfer enhancement.

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Section: Nanofluid Preparationmentioning

confidence: 99%

Experimental investigation of heat transfer and pressure drop in a minichannel heat sink using Al2O3 and TiO2–water nanofluids

Moghanlou

Noorzadeh

Ataei

et al. 2020

J Braz. Soc. Mech. Sci. Eng.

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“…The addition of nano particles with base fuel tends to complete combustion by the catalytic action of particles which have larger active surface area for the chemical reactions (Saxena et al 2017) Many researchers have studied the impact of nano particles with diesel -biodiesel blends on the fuel properties, combustion, Performance and emission characteristics in diesel engine. (Kumar et al 2017;Naja 2018;Soudagar et al 2018;Ağbulut et al 2020). The impact of MgO nano particles on the cold ow properties, performance and emission characteristics with waste cooking oil biodiesel (Ranjan et al 2018) was experimentally studied in a constant speed, single cylinder, water cooled , vertical compression ignition engine and found that, the addition of MgO in the concentration of 30 ppm gave better fuel properties such as cloud point, cold lter plugging point and pour point.…”

Section: Introductionmentioning

confidence: 99%

Performance, Combustion and Emission evaluation of Direct Injection diesel engine fueled with ZnO dispersed waste cooking oil biodiesel

Dhanarasu

Rameshkumar

Maadeswaran

2021

Preprint

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In present scenario, the fast depletion of fossil fuels and energy crises motivated the researchers towards finding an alternative sources for energy. In this work, the performance, combustion and emission of hydrothermally synthesized ZnO nanoparticles dispersed waste cooking oil biodiesel in single cylinder, four stroke, Direct Injection- Diesel Engine with eddy current dynamometer was investigated. The synthesized ZnO nano particles were characterized by XRD, FTIR, SEM and EDX to find crystallinity, functional groups and surface morphology. Waste cooking oil biodiesel was produced via conventional one step alkali catalyst Trans-esterification process. Test fuels were prepared with dispersion of ZnO nanoparticles in the concentration of 10ppm, 20ppm and 30ppm with B20 (20% waste cooking oil biodiesel and 80% diesel) with the aid of magnetic stirrer and ultra-sonication. The test results exposed that the addition of ZnO nanoparticles with B20 gave better Performance in terms of BTE and BSFC compared to B20. The addition of ZnO nano particles with 30ppm concentration was identified as better fuel among all tested fuels in this work. 30ppm addition of ZnO nano particles with B20 records 1.78 % increase in BTE and 10.34% decrease in BSFC. The emission like CO, HC and smoke were 20%, 15.4% and 17.39% lower than diesel. On the other hand NOx was slightly higher than diesel but lower than B20.

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“…In addition, lots of nanoparticles have been investigated in many base fluids by many researchers. Their obtained outcomes revealed that mixing nanoparticles to the base working fluid generally has positive impact on the performance of HE [19][20][21][22][23][24]. Recently, hybrid nanofluid solutions have become a popular research area because of their advantages such as improved thermal properties and heat transfer performance.…”

Section: Introductionmentioning

confidence: 99%

A comparative study on utilizing hybrid-type nanofluid in plate heat exchangers with different number of plates

Gürbüz

Sözen

Variyenli

et al. 2020

J Braz. Soc. Mech. Sci. Eng.

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Different methods have been utilized to enhance the thermal efficiency of the heat exchangers (HEs). A widely used method to upgrade the thermal efficiency of HEs is upgrading the thermal properties of working fluid by utilizing nanoparticles. In this study, Al 2 O 3 and CuO have been utilized to prepare Al 2 O 3-CuO/water hybrid nanofluid. Accordingly, Al 2 O 3 and CuO nanoparticles have been mixed into the water with 1% (50:50) weight concentration. The main objective of this work is testing the prepared hybrid nanofluid in plate-type HEs (PHEs) with 8, 12 and 16 plates to determine the influence of number of plates on heat transfer improvement by hybrid nanofluid. Experimental findings of the present study demonstrated that utilizing Al 2 O 3-CuO/water hybrid-type nanofluid in the PHE enhanced thermal efficiency notably in comparison with singletype nanofluids. Using this hybrid nanofluid increased the thermal performance in all PHEs with different number of plates. However, it is observed that increasing number of plates led to more increment in thermal performance by utilizing hybrid nanofluid. The highest increment in overall heat transfer coefficient was obtained as 12%, 19% and 20% in PHEs with eight, 12 and 16 plates, respectively. In addition, the highest enhancement in effectiveness was achieved as 10%, 11.7% and 16% in PHEs with eight, 12 and 16 plates, respectively. Keywords Plate heat exchanger • Hybrid nanofluid • Al 2 O 3-CuO/water • Performance List of symbols A Total heat transfer area (m 2) C Heat capacity rate (W/K) c p Specific heat capacity (J/kg K) D h Hydraulic diameter (m) f Friction factor

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Impact of various metal-oxide based nanoparticles and biodiesel blends on the combustion, performance, emission, vibration and noise characteristics of a CI engine

Cited by 244 publications

References 47 publications

Experimental investigation of heat transfer and pressure drop in a minichannel heat sink using Al2O3 and TiO2–water nanofluids

Experimental investigation of heat transfer and pressure drop in a minichannel heat sink using Al2O3 and TiO2–water nanofluids

Performance, Combustion and Emission evaluation of Direct Injection diesel engine fueled with ZnO dispersed waste cooking oil biodiesel

A comparative study on utilizing hybrid-type nanofluid in plate heat exchangers with different number of plates

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