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Experimental investigations on the performance and emissions of compression ignition engine fuelled with lower blends of neem-based biodiesel

Dhande Dinesh, Navale Shirish

Archiwum Motoryzacji

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2024

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Vol. 103, nr 1

57--76

EN

Biodiesel has attracted a lot of attention as a possible replacement for traditional fuels due to the limited supply of fossil fuels and the growing concern about emissions of greenhouse gases. It is renewable and produces less hazardous emissions when burned. Enhancing biodiesel production is imperative to meet the escalating demand for eco-friendly fuels, serving as a remedy for the rising costs and dwindling accessibility of petroleum. This study aims in boosting neem biodiesel production specially in dry and unproductive soil regions and improving engine power using neem oil biodiesel, especially using lower blends. This study is in line with the initiatives that promote sustainable energy growth by gradually increase biodiesel blending from 15% to 30% in the near future. This research delves into the manufacturing of biodiesel from neem seeds and impact of its blends on the efficiency and emissions of compression ignition engines when combined with regular fuel. The biodiesel was produced using the transesterification method.Three distinct blends, B10, B15, and B20, were prepared by blending neem biodiesel with regular diesel. When testing engine performance, these mixtures were compared against pure diesel fuel. The specific fuel consumption and brake thermal efficiency of all blend combinations improved with increasing load. In comparison to pure diesel, there were also decreased percentages of hydrocarbons (HC), carbon monoxide (CO), and smoke opacity. There was an increase in nitrogen oxides with increasing load for all mixes as compared to pure diesel. The research results highlight neem biodiesel as a practical and efficient alternative to conventional diesel fuel due to its ability to enhance engine efficiency and lowering emissions.

2

The analysis of diesel engine performance equipped with inner catalyst

Janicka A., Sroka Z. J., Walkowiak W.

Silniki Spalinowe

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2011

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R. 50, nr 3

EN

The paper presents the results of the research focused on the effect of inner catalyst on diesel engine operating performance. The active factor was applied on the engine valves surface and implemented into combustion space. The method of inner catalyst preparation is shown. The methodology of the engine's test in the laboratory is proposed, too. Platinum and rhodium were applied as active factors. The plasma-sprayed zirconium ceramic was used as catalyst support. The ceramic coating contributes also a local thermal barrier and causes increasing the temperature in zone of catalyst application what can result in catalyst effectiveness improvement. The engine's test bed was equipped with in-cylinder pressure and temperature measurement systems. Several engine's operating parameters were tested e.g.: engine power, engine speed, fuel consumption and exhaust gases toxicity (especially PAHs and VOCs concentration).

PL

W pracy przedstawiono wyniki badań, których celem była ocena wpływu zastosowania katalizatora umieszczonego wewnątrz cylindra silnika o zapłonie samoczynnym na parametry pracy tego silnika. Zaprezentowano metodę preparatyki katalizatora jak również metodę oceny skuteczności zaproponowanego rozwiązania na stanowisku hamownianym. Jako czynnik aktywny katalitycznie podczas realizacji badań wykorzystano platynę oraz rod. Warstwę nośną katalizatora stanowiła ceramika cyrkonowa naniesiona metodą natryskiwania plazmowego na wybrane elementy silnika (zawory silnikowe). Warstwa ceramiczna stanowiła nie tylko nośnik katalizatora pozwalający rozwinąć jego powierzchnię ale również lokalną barierę termiczną. Stanowisko do badań silnikowych (hamownia) wyposażona była w układ pomiaru ciśnień i temperatur wewnątrz cylindra. Monitorowano następujące parametry: moc silnika, zużycie paliwa jak również toksyczność spalin (w szczególności emisję szczególnie toksycznych wielopierścieniowych węglowodorów aromatycznych oraz lotnych związków organicznych).

3

Energy - time method for assessment of main diesel engine operation

Rudnicki J.

Journal of KONES

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2007

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Vol. 14, No. 3

519-526

EN

This paper presents a development of the known qualitative method for assessment of engine operation, applied to ship main diesel engine as an example. According to this interpretation engine operation can be presented as a physical quantity. In this aspect, based on the selected functional system of the engine, was assessed usefulness of the quantity for description reliability features of the system. To the analysis was applied Poisson's uniform process which made it possible to elaborate a model of run of worsening the considered system's operation taken as a random process of identical independent decreases of energy efficiency within a given time interval. The presented method is a valuable supplement for description reliability features of ship main engine what is important for realization of shipping tasks by sea. Additional advantage is versatility which makes that it can be applied to reliability analysis of any ship device or ship energy subsystem. Classification of the engine serviceability states with taking into account the assessment of its operation in energy-time aspect, schematic diagram of lubricating system of RTA48-TB engine and values of lubricating oil parameters in steady conditions for the engine load, graphical presentation of lubricating oil cooler operation graphical interpretation of the decreasing of oil cooler efficiency are presented in the paper