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The objective of this research is to present results of the performance (torque, power, thermal efficiency and specific fuel consumption) in a heavy-duty diesel engine when fueled with diesel-waste plastic pyrolysis oil (WPO) blends in full load condition. The tested engine is installed on an engine test bench and is attached with several sensors....
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Figure 6 shows that the average thermal efficiency of diesel operation is 35.65% while diesel- WPO blends produce 31.47%, 31.00% and 29.68%. This is due to two main reasons, firstly, WPOs produce less output power with almost the same amount of fuel injection. The other reason is due to the fact that, in WPO combustion, the higher cylinder pressure generates a higher exhaust gas temperature together with higher heat losses [15]. Theoretically, engine specific fuel consumption parameter is inversely proportional to thermal efficiency. Therefore, diesel presents the lowest specific fuel consumption. WPOs 25%, 50% and 75% present higher values, respectively, as shown in Figure 7. The contribution of this research is to propose a model to investigate effects among diesel-WPO mixing ratios and engine speeds. Waste plastic oil is blended into diesel in several mixing ratios and run by a heavy duty engine in order to investigate the effects on engine performance characteristic. Three mixing ratios including WPO 25%, 50% and 75% are tested at a wide range of engine speed and the results compared to those of diesel (WPO 0%). The statistical analysis using ANOVA reveals that mixing ratio, engine speed and the interaction are significant at 95% confidence level. The second-order quadratic modelling is enough to fit the relations between process parameters and responses. MAPE method shows the errors in the range of 1.614 to 2.987%, which is considered very high accuracy in prediction. The benefit of this research is that the user can apply full-factorial design and quadratic modelling to practically predict the result in a number of diesel- WPO mixing ratios and engine speeds. The experimental results show that, though the heating value of WPO is compatible to diesel, other fuel properties are also important. Lower Cetane number might lead to abnormal combustion which results in 23.79% reduction in output torque and power for WPO 75%. Thermal efficiency decreases up to 5.97% with an increment of specific fuel consumption. Even though the overall results from this investigation can be considered that WPO blends do not have performance compatibility to that of diesel, WPO is still attractive in the waste-to-energy viewpoint. Since it is not generated from conventional fossil fuel, the cost of WPO is then unquestionably cheaper and it helps the plastic waste management process. Operation cost and external costs, including fuel cost, pollution cost and country’s energy security scenario, should be integrated in future research for the cost-benefit analysis or optimization. WPO can then be a successful alternative fuel in a similar way to ...
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... They performed experiment for ve loads, i.e. 1,3,5,7 and 9 using Diesel, Palm biodiesel-diesel blends i.e. diesel, P10, P20, P40, P60, P80 and pure Palm biodiesel with load variation of 1kg load to 9kg load and compared with base cases. The result showed that Palm biodiesel increased the specic fuel consumption also increased and brake thermal efciency slightly decreased in the P40 blend the fuel consumption is nearest to the diesel fuel [7]. ...
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... This can help mitigate some of the issues related to hazardous emissions caused by the disposal of discarded plastics. Many investigations are carrying by researchers on pyrolysis oil as an alternative to petroleum fuel [1]- [6]. The pyrolysis process is a waste plastic recycling process in which petroleum grade plastic oil is the critical byproduct. ...
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The experimental investigation is carried out in a DI CI engine with a constant compression ratio of 17.5 using neat plastic oil and nano-additives, and a comparative analysis is analyzed using neat diesel fuel. The combustion characteristics on peak incylinder pressure and ignition delay are analyzed, while emission parameters such as CO and HC are analyzed using diesel, PO, POAL100, POAL150, and POAL200. The in cylinder pressure using different concentration of 100, 150 and 200 ppm of titanium
oxide nanoparticle in neat plastic oil is improved 1.52, 3.25, and 3.44 %, respectively than neat plastic oil. Results showed that the influence of nano-additive with plastic oil improved the in-cylinder pressure and ignition delay while compared to neat diesel.
Similarly, the emission parameters such as CO and HC are significantly reduced by the addition of nano-additive with neat plastic oil. The CO is reduced by 9.3, 16.27, 34.88, 51.16 % using PO, POAL100, POAL150, and POAL200 than neat diesel fuel in the engine.
