Yazar "Panchal, Hitesh" seçeneğine göre listele

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    Experimental and numerical assessment of the rotary bed reactor for fuel-processing and evaluation of produced oil usability as fuel substitute
    (Elsevier, 2022) Gad, Mohammed Sayed; Ağbulut, Ümit; El-Shafay, A. S.; Panchal, Hitesh; Emara, Kareem; Al-Mdallal, Qasem M.; Afzal, Asif
    In current work, waste tires recycling using pyrolysis was performed inside a rotary bed reactor without oxygen-producing oil, black carbon, and synthetic gas. In that respect, CFD analysis was applied using ANSYS software to design the reactor and test its material resistance to the temperature rise. Thermal and mechanical stresses were evaluated to find an acceptable reactor design. Pyrolysis of tires to oil was performed at a temperature of 420 degrees C. Tire and diesel oils blends of 5, 10, and 20% volume percentages were prepared for experimentation. Tire oil blends properties were close to crude diesel. Characteristics of combustion, performance and emissions of diesel engines that used tire oil blends were investigated compared to crude diesel. The thermal efficiency maximum decrease of TO20 was 21% in comparison to pure diesel. The maximum increases in CO, smoke, and HC emissions of TO20 were 35, 20, and 25% compared to diesel fuel, respectively. The highest decline in NOx emission of TO20 was 19% related to crude diesel fuel. Oil blends achieved the higher peak cylinder pressures about diesel fuel. In conclusion, lower volume percentages of up to 20% of tire and diesel oil blends are recommended to be used without any engine modifications.
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    Impact of produced oxyhydrogen gas (HHO) from dry cell electrolyzer on spark ignition engine characteristics
    (Pergamon-Elsevier Science Ltd, 2024) Gad, M. S.; El-Shafay, A. S.; Agbulut, Umit; Panchal, Hitesh
    In the current study, an onboard dry cell electrolyzer was built to produce an oxyhydrogen (HHO) flow rate of 0.5 L/min by water electrolysis. The objective is to show the impact of oxyhydrogen introduction on engine exhaust gases, combustion characteristics, and engine performance related to gasoline. The experiments were carried out in a petrol engine at a fixed engine speed of 3000 rpm and variable engine loading. When comparing HHO gasoline dual fuel to standard gasoline fuel, the maximum improvements in volumetric efficiency, thermal efficiency and air-fuel ratio were determined as 7.5%, 8% and 11%, respectively. In the case of HHO addition, the highest reductions in specific fuel consumption and exhaust gas temperature were 9% and 6.5%, respectively, compared with conventional gasoline fuel. The highest reduction in CO, HC, NOx, and CO2 concentrations was observed as 18%, 9%, 15%, and 11%, respectively, for HHO-gasoline dual-fuel mode compared to gasoline fuel. The peak cylinder pressure and HRR improvements were 1.5% and 4.5%, respectively, at 100% engine load. Oxyhydrogen gas is highly recommended as a substitute fuel since it significantly enhances engine performance and combustion characteristics as well as reducing exhaust pollutants. (c) 2023 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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    Numerical and experimental investigation of the influence of various metal-oxide-based nanoparticles on performance, combustion, and emissions of CI engine fuelled with tamarind seed oil methyl ester
    (Pergamon-Elsevier Science Ltd, 2023) Kumbhar, Vishal; Pandey, Anand; Sonawane, Chandrakant R.; Panchal, Hitesh; Ağbulut, Ümit
    The present study aims to experimentally and numerically investigate diesel engine's combustion, performance, and exhaust emission characteristics fuelled with tamarind seed oil methyl ester (TSOME) and nanoparticles as fuel additives. The Diesel-RK, a complete thermodynamic cycle engine analysis tool, is employed to assess the engine characteristics. Cerium Oxide (CeO2) and Aluminium Oxide (Al2O3) nanoparticles are introduced as additives and dispersed in pure TSOME at a concentration of 30 ppm to obtain TSOME + CeO2 and TSOME + Al2O3 blends correspondingly. The tests are conducted when the engine is loaded from 0 to 100% with intervals of 25%. The research reveals that incorporating CeO2 and Al2O3 improves the BTE by 17-18% compared to that of TSOME. TSOME + CeO2 and TSOME + Al2O3 substantially decreased CO2, HC, and smoke emissions compared to those of conventional diesel fuel. Furthermore, when CeO2 and Al2O3 nanoparticles are added into the TSOME fuel, oxides of nitrogen emissions are mitigated by 6-7% compared to TSOME by reducing the fuel consumption. Also, the addition of nanoparticles led to an improvement in combustion characteristics compared to pure TSOME due to the high catalyst role of nanoparticles, which accelerate the chemical reactions during the combustion cycle. Furthermore, the nanoparticles-added test fuels have generally presented the competitive results with each other, but the CeO2 nanoparticle presented slightly better results in terms of exhaust emissions, while Al2O3 added test fuel gave slightly better results in terms of engine performance. Finally, the results of this research show that metal oxide-based nanoparticles such as CeO2 and Al2O3 as a fuel additive can improve the characteristics of diesel engines fuelled by biofuels.
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    Performance analysis of biofuel-ethanol blends in diesel engine and its validation with computational fluid dynamics
    (Springer Heidelberg, 2023) Kolhe, Ajay V.; Malwe, Prateek D.; Chopkar, Yashraj; Panchal, Hitesh; Agbulut, Umit; Mubarak, Nabisab Mujawar; Chowdhury, Subrata
    The engine tests aimed to produce comparable data for fuel consumption, exhaust emissions, and thermal efficiency. The computational fluid dynamics (CFD) program FLUENT was used to simulate the combustion parameters of a direct injection diesel engine. In-cylinder turbulence is controlled using the RNG k-model. The model's conclusions are validated when the projected p-curve is compared to the observed p-curve. The thermal efficiency of the 50E50B blend (50% ethanol, 50% biofuel) is higher than the other blends as well as diesel. Diesel has lower brake thermal efficiency among the other fuel blends used. The 10E90B mix (10% ethanol, 90% biofuel) has a lower brake-specific fuel consumption (BSFC) than other blends but is slightly higher than diesel. The temperature of the exhaust gas rises for all mixtures as the brake power is increased. CO emissions from 50E50B are lower than diesel at low loads but slightly greater at heavy loads. According to the emission graphs, the 50E50B blend produces less HC than diesel. NOx emission rises with increasing load in the exhaust parameter for all mixes. A 50E50B biofuel-ethanol combination achieves the highest brake thermal efficiency, 33.59%. The BSFC for diesel is 0.254 kg/kW-hr at maximum load, while the BSFC for the 10E90B mix is 0.269 kg/kW-hr, higher than diesel. In comparison to diesel, BSFC has increased by 5.90%.
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    Waste to Energy: An experimental comparison of burning the waste-derived bio-oils produced by transesterification and pyrolysis methods
    (Pergamon-Elsevier Science Ltd, 2022) Gad, Mohammed Sayed; Panchal, Hitesh; Ağbulut, Ümit
    In the present research, waste cooking oil biodiesel (WB) and waste pyrolysis oil (WPO) are produced via transesterification and pyrolysis methods. Then the produced WB and WPO are blended at the volumetric percentages of 25, 50, 75, and 100% into the conventional diesel fuel. These fuel blends are tested on a single-cylinder diesel engine under the varying engine loads (1, 2, 3, and 4 kW) at a constant crankshaft speed of 1500 rpm. The results show that both WB and WPO blended fuels decrease the brake thermal efficiency and higher exhaust gas temperature than diesel fuel. As the WB content in the test fuel increases, CO, HC, and smoke emissions gradually decrease due to the high oxygen content of WCO, but NOx emission increases. In terms of exhaust emissions, the reverse trend is noticed for WB blended test fuels (high CO, HC, and smoke, but low NOx) with the lack of oxygen atoms for WPO substitutes. As the percentage of WPO in the test fuel is increased, CO, HC, and smoke emissions gradually increase in comparison to those of diesel fuel, while NOx emissions exhibited a reverse trend. In comparison to that of reference diesel fuel, the highest thermal efficiency declines are found to be 22% for WB100 and 19% for WPO100. WPO10 0 leads to the significant increment in the HC, CO, and smoke emissions by 59, 36, and 31%, respectively. Compared to diesel fuel, WB100 ensures the highest CO, HC, and smoke emission reduction by 45, 62, and 47%, respectively. On the other hand, the maximum increase in NOx emission is found to be 46% for WB100 test fuel, while the maximum decrease is found to be 25% for WPO10 0 test fuel as compared to that of diesel fuel. In terms of engine performance and exhaust pollutants excluding NOx emission, it is well-noticed that the WB substitutes present more promising results than those of WPO substitutes. Accordingly, the present research proves that the transesterification method is more suitable for biofuel production than the pyrolysis method. (c) 2021 Published by Elsevier Ltd.