https://orcid.org/0000-0002-5702-0315
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ABSTRACT
The application of biodiesel has become more significant in the current decades owing to the environmental aspects and rapid exhaustion of petroleum fuel reserves. In the present study, the influence of fuel injection pressures on engine performance and emission results has been evaluated in a diesel engine using frying oil methyl ester. The waste frying oil was filtered, transesterified and employed in the diesel engine for the experimental analysis. The experiment has been conducted with biodiesel different fuel injection pressures of 220 bar, 240 bar and 260 bar to investigate the performance, combustion and emission parameters in a direct injection (D.I) diesel engine under constant speed (1500 r.p.m) and varying load condition. In the present experimental work, the performance and emission results of the engine have been taken initially with diesel fuel at the injection pressure of 220 bar as the reference reading. The results show that the brake thermal efficiency of the engine with biodiesel increased by 8.94% and 16.09% when the fuel injection pressure is raised from 220 bar to 240 bar at the rated power condition. The CO, HC and smoke emissions were significantly reduced by 22.32%, 14.23% and 29.03% respectively at the injection pressure of 260 bar due to superior combustion. But on the other hand, the oxides of nitrogen emissions rise with fuel injection pressure for the biodiesel fuel. At higher fuel injection pressure especially at 260 bar, the engine fueled with biodiesel has better control over CO, HC and smoke emissions, and the performance results were improved and comparable with the results of conventional diesel fuel.
Nomenclature
| FOME | = | Frying oil methyl ester |
| BSFC | = | Brake Specific Fuel Consumption |
| B100 | = | Biodiesel |
| B100(220 bar) | = | Biodiesel at 220 bar fuel injection pressure |
| B100(240 bar) | = | Biodiesel at 240 bar fuel injection pressure |
| B100(260 bar) | = | Biodiesel at 240 bar fuel injection pressure |
| TDC | = | Top dead center |
| bTDC | = | Before Top dead center |
| CO | = | Carbon Monoxide |
| HC | = | Hydrocarbon |
| NOX | = | Oxides of Nitrogen |
| J/CA | = | Joules per Crank Angle |
Additional information
Notes on contributors
Krishnamani Selvaraj
Krishnamani Selvaraj graduated in Mechanical Engineering and obtained his Master's degree in Internal combustion engineering from College of Engineering, Guindy, Anna university,Chennai.His teaching experience spans over 11 years. Presently he is working as an Assistant professor in SASTRA (Deemed University), Thanjavur, India. His area of interests are Heat transfer, I.C. Engines and Renewable energy sources.
Mohanraj Thangavel
Mohanraj Thangavel completed his graduation in Mechanical engineering in India. His post graduation (Master of Engineering) is from National Institute of Technology, Trichy India. At present working as Senior Assistant Professor at SASTRA (Deemed University), Thanjavur, Tamil Nadu, India. His area of Interests are in IC engines and biodiesel.