Combustion, performance and emission analysis of preheated KOME biodiesel as an alternate fuel for a diesel engine
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Combustion, performance and emission analysis of preheated KOME biodiesel as an alternate fuel for a diesel engine Shankar Vitthal Kodate1 · Ajay Kumar Yadav1 · G. N. Kumar1 Received: 28 October 2019 / Accepted: 8 May 2020 © Akadémiai Kiadó, Budapest, Hungary 2020
Abstract In the present work, karanja oil methyl ester (KOME) biodiesel is used in a compression ignition engine to find an alternative to diesel. The use of biodiesel in a CI engine leads to poor performance and high brake specific fuel consumption due to the higher viscosity and lower calorific value of biodiesel. This problem can be reduced by increasing the injection temperature of biodiesel or its blends to a certain temperature. In this study, working fuel is tested at preheating temperatures of 95 °C for various loading conditions (0, 25, 50, 75 and 100%). Effect of different KOME biodiesel–diesel blends (B0, B30, B50 and B100) on engine performance, combustion and emissions is studied at different loads. At higher temperature, the viscosity of the fuel decreases which leads to better combustion, improves the atomization as well as vaporization of fuel in a diesel O2 engine, resulting in higher engine performance and lower emissions of CO and HC, with slight increment in NOX and C emission compared to unheated neat diesel and biodiesel blends. The result shows that for 100% biodiesel (B100) at full load, BTE is improved by 9.1% compared to unheated case. Preheating of B100 fuel upto 95 °C at full load decreases the BSFC, CO and HC emission by 6.5%, 8.1% and 10.6%, respectively, compared to unheated case. Keywords Biodiesel · KOME · Fuel inlet temperature · Emission · Combustion Abbreviations BTE Brake thermal efficiency BSFC Brake specific fuel consumption KOME Karanja oil methyl ester B0 0% biodiesel + 100% diesel B30 30% biodiesel + 70% diesel B50 50% biodiesel + 50% diesel B100 100% biodiesel + 0% diesel CO Carbon monoxide NOX Nitrogen oxides HC Hydrocarbon CO2 Carbon dioxide E Uncertainty CA Crank angle
* Ajay Kumar Yadav [email protected]; [email protected] 1
Department of Mechanical Engineering, National Institute of Technology Karnataka, Surathkal, Mangalore, Karnataka 575025, India
Introduction As increase in world population continues and standard of living increases, worldwide demand for energy expands drastically, which has put energy issues in the global attention. Limited supplies of conventional fossil fuels will not be able to meet the necessities for world development in a sustainable way. Therefore, renewable and alternative clean burning fuels need to be identified. Biodiesels are the alternative fuel which are extracted from vegetable oils through a transesterification method. Diesel engines are widely used and are dominating power sources for road transport sector, commercial and agriculture sectors for the production of mechanical energy and electricity, due to their superior thermal efficiency, robustness, operational reliability and lower exhaust emissions. By using sunflower oil, pea
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