Yazar "Ozcanli, Mustafa" seçeneğine göre listele

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    Comparison of transesterification and thermal cracking methods on fuel specifications of castor oil biodiesel
    (Elsevier Science Bv, 2017) Serin, Hasan; Akar, Mustafa Atakan; Yildizhan, Safak; Ekinci, Firat; Ozcanli, Mustafa
    [Abstract Not Available]
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    Determining the effect of tung biodiesel on thermodynamic, thermoeconomic, and exergoeconomic analyses at high engine speeds
    (Frontiers Media Sa, 2024) Sanli, Bengi; Guven, Onur; Ozcanli, Mustafa; Uludamar, Erinc
    Tung biodiesel is a promising alternative fuel type produced from the tung tree. In the current study, the effect of the addition of 20%, by volume, of tung biodiesel to diesel fuel was evaluated in terms of energetic-exergetic analyses based on the first and second laws of thermodynamic at various high engine speeds (2,400, 2,600, and 2,800 rpm). Additionally, this study aimed to assess the thermoeconomic and exergoeconomic aspects of a diesel engine. The findings revealed that the amount of energy converted to useful work for the diesel fuel was higher than that of the DTB20 fuel, even though the fuel energy obtained from DTB20 fuel was higher than that of diesel fuel at all engine speeds. The highest energy and exergy efficiencies for the engine fueled with diesel fuel were obtained as 31.07% and 29.15% respectively, while the corresponding values for the engine fueled with DTB20 fuel were determined as 27.15% and 25.19% at the engine speed of 2,400 rpm, respectively. However, at 2,800 rpm, a significant decrease in both the energy and exergy efficiencies was observed for both diesel and tung biodiesel blended fuels due to the increased mechanical friction of the engine components. Furthermore, at the highest engine speed, entropy generation increased, owing to a higher exergy destruction rate. The entropy generation rate increased to 0.38 kW/K for diesel fuel and 0.46 kW/K for DTB20 fuel since the enhancement of the engine speed caused the ascent of the fuel consumption rate. Regarding thermoeconomic-exergoeconomic analyses, for both diesel and tung biodiesel blended fuels, there is no distinct difference in the thermoeconomic-exergoeconomic parameters at 2,400 and 2,600 rpm as the values of these parameters at the engine speed of 2,800 rpm increased significantly. In light of all the findings, it can be concluded that the engine speed of 2,800 rpm is not applicable to run the engine due to higher friction and corresponding energy destruction in the engine system.
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    Energy and exergy analysis of biodiesel
    (Elsevier Science Bv, 2017) Ozcanli, Mustafa; Serin, Hasan; Calik, Ahmet; Celebi, Kerimcan; Akar, M. Atakan
    [Abstract Not Available]
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    Evaluation of Effects of Compression Ratio on Performance, Combustion, Emission, Noise and Vibration Characteristics of a VCR Diesel Engine
    (Int Journal Renewable Energy Research, 2018) Yildizhan, Safak; Uludamar, Erinc; Ozcanli, Mustafa; Serin, Hasan
    In this study, an experimental study has been evaluated on a variable compression ratio diesel engine to investigate the compression ratio effects on engine performance, combustion, emission, vibration, and noise characteristics. The result of engine characteristics were studied at 12:1, 14:1, and 16:1 compression ratios under partial load condition. Experimental engine was operated with diesel, biodiesel and diesel-biodiesel blends throughout the experiments. Experimental study indicated that compression ratio considerably affects the engine characteristics that measured in this study. It is observed that in the experiments, higher compression ratio results in higher brake thermal efficiency and thus lower specific fuel consumption. Higher compression ratios resulted with higher cylinder pressure and thus improved combustion. Increasing compression ratio improved carbon monoxide emission, however, increased carbon dioxide emission and nitrogen oxides formation. Also, noise and vibration of the engine reduced with the increment of compression ratio.
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    Evaluation of energetic-exergetic and sustainability parameters of biodiesel fuels produced from palm oil and opium poppy oil as alternative fuels in diesel engines
    (Elsevier Sci Ltd, 2019) Sanli, Bengi Gozmen; Uludamar, Erinc; Ozcanli, Mustafa
    In present study, the energetic and exergetic performances of a diesel engine fueled with conventional diesel and various biodiesel fuels were investigated experimentally. Energetic and exergetic performance parameters of the engine fueled with neat diesel, neat opium poppy and neat palm biodiesel fuels were calculated and compared with each other. Moreover, the sustainability analysis was carried out in the study. The findings of this study indicated that the energetic and exergetic performance parameters were profoundly affected by the engine speed and the fuel type. Both the thermal and exergetic efficiencies were the highest at the engine speed of 1600 rpm for all tested fuels. At this engine speed, the lowest thermal efficiency of the engine occurred with palm biodiesel as 34.92%, while the highest thermal efficiency value was 35.85% with diesel fuel. The exergy efficiencies of corresponding fuel types ranged from 32.50% to 33.64% for palm biodiesel and diesel fuels, respectively. In addition, the difference between the exergy efficiencies of diesel fuel and opium poppy biodiesel fuel was about 0.90%. Both the energy and exergy efficiencies diminished with the increment of engine speed higher than 1600 rpm for all fuel types. The maximum values of sustainability index for all fuel types were obtained at the engine speed of 1600 rpm. The best exergetically- sustainable fuel was the diesel fuel followed by the opium poppy biodiesel fuel. According to the results, opium poppy biodiesel might replace with the conventional diesel fuel due to the similarity of energetic and exergetic performance parameters.
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    Evaluation of fuel consumption and vibration characteristic of a compression ignition engine fuelled with high viscosity biodiesel and hydrogen addition
    (Pergamon-Elsevier Science Ltd, 2017) Celebi, Kerimcan; Uludamar, Erinc; Ozcanli, Mustafa
    Viscosity property of a fuel is a crucial point for internal combustion engine characteristics. Performance and emission parameters as well as injector's life of an engine is primarily effected by viscosity of the fuels. In present study, effect of high viscosity biodiesel fuels with hydrogen addition was investigated in a compression ignition engine. Biodiesels that are produced from Pongamia Pinnata and Tung oils were used as pure biodiesels as well as blended with low sulphur diesel fuel at the volume ratios of 50% and 75%. Furthermore, hydrogen gas was injected into intake manifold in order to evaluate its effect with the usage of high viscous liquid fuels. The results revealed that brake specific fuel consumption was increased with biodiesel fuels, whereas hydrogen addition into intake manifold improved the consumption. Total vibration acceleration of the engine reduced with biodiesel and hydrogen additions. Frequency spectrum indicated that this decrement was primarily lowered due to less energy transmitted through engine pistons that converted from chemical energy of fuels. (C) 2017 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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    Experimental and artificial neural network approach of noise and vibration characteristic of an unmodified diesel engine fuelled with conventional diesel, and biodiesel blends with natural gas addition
    (Elsevier Sci Ltd, 2017) Celebi, Kerimcan; Uludamar, Erinc; Tosun, Erdi; Yildizhan, Safak; Aydin, Kadir; Ozcanli, Mustafa
    Replacing conventional diesel fuel has gained great interest owing to environmental issues. Therefore all effect of alternative fuels must be well-known in order to forthcoming engine development concern. In this study acoustic and vibration effect of biodiesel and their blends were investigated on an unmodified diesel engine which enriched with natural gas. Throughout this work, experimental engine was fuelled with conventional diesel, sunflower and canola biodiesel blends with ratio of 20% and 40%, by volume. Furthermore, natural gas was inducted through intake manifold at various flow rates; 5 L/min, 10 L/min, and 15 L/min with intake air. Experiments revealed that, compared to conventional diesel fuel, sunflower and canola biodiesels decreased sound pressure level and vibration of the test engine. Addition of natural gas decreased the values even more. Furthermore, exhaust emission of the engine has been evaluated. Beside experimental study, an artificial neural network model was developed in order to predict sound pressure level and vibration of the engine. Artificial neural network results showed that, generated models were capable of estimation of parameters with high accuracy. (C) 2017 Elsevier Ltd. All rights reserved.
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    Using HHO (Hydroxy) and hydrogen enriched castor oil biodiesel in compression ignition engine
    (Pergamon-Elsevier Science Ltd, 2017) Ozcanli, Mustafa; Akar, Mustafa Atakan; Calik, Ahmet; Serin, Hasan
    Hydrogen and HHO enriched biodiesel fuels have not been investigated extensively for compression ignition engine. This study investigated the performance and emissions characteristics of a diesel engine fueled with hydrogen or HHO enriched Castor oil methyl ester (CME)-diesel blends. The production and blending of CME was carried out with a 20% volumetric ratio (CME20) using diesel fuel. In addition, the enrichment of intake air was carried out using pure HHO or hydrogen through the intake manifold with no structural changes with the exception of the reduction of the amount of diesel fuel for a naturally aspirated, four cylinder diesel engine with a volume of 3.6 L. Hydrogen amount was kept constant with a ratio of 10 L/min throughout the experiments. Engine performance parameters, including Brake Power, Brake Torque, Brake Specific Fuel Consumption and exhaust emissions including NOx and CO, were tested at engine speeds between 1200 and 2600 rpm. It is seen that HHO enriched CME has better results compared to pure hydrogen enrichment to CME. An average improvement of 4.3% with HHO enriched CME20 was found compared to diesel fuel results while pure hydrogen enriched CME20 fuel resulted with an average increase of 2.6%. Also, it was found that the addition of pure hydrogen to CME had a positive effect on exhaust gas emissions compared to that adding HHO. The effects of both enriched fuels on the engine performance were minimal compared to that of diesel fuel. However, the improvements on exhaust gas emissions were significant. (C) 2017 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.