Thangaraja J

Department of Automotive Engineering

School of Mechanical Engineering

Vellore Campus

Vellore Institute of Technology (VIT) is a private university located in&nbsp;Tamil Nadu, India. Founded in 1984, as Vellore Engineering College, the institution offers 20 undergraduate, 34 postgraduate, four integrated and four research programs. It has campuses in Vellore, Amravati, Bhopal and Chennai.

VIT is one of the top ranked private universities in India according to NIRF, THE and QS Rankings.&nbsp;Govt. of India has recognized&nbsp;VIT, Vellore as an&nbsp;Institution of Eminence. This has allowed VIT to take independent quality initiatives and move up in world ranking.

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VIT University

Fuel

Energy Policy

The National Policy of biofuels of India – A perspective

Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering

An overview of the effects of fuel molecular structure on the combustion and emissions characteristics of compression ignition engines

Renewable and Sustainable Energy Reviews

A comprehensive review on performance, combustion and emission characteristics of biodiesel fuelled diesel engines

Production, characterization and performance of biodiesel as an alternative fuel in diesel engines – A review

Biodiesel is an eco-friendly, renewable biofuel derived primarily from vegetable oils and is a potential carbon neutral alternative to fossil diesel for compression ignition (CI) engine applications. The biodiesels produced from different feedstocks vary significantly in their fatty acid methyl ester composition and physico-chemical properties and thereby, engine performance and emissions. In the present work, experimental investigations are done with four candidate biodiesel fuels, viz. sunflower, rice-bran, palm and coconut in two different engine configurations, viz. light duty naturally aspirated (NA) and heavy duty turbocharged (TC) to establish the effects of biodiesel composition variations as well as engine type variations on the engine characteristics. To establish biodiesel composition effects on engine characteristics, two new parameters, viz. straight chain saturation factor (SCSF) and modified degree of unsaturation (DUm) are developed in this work, which can be estimated directly from the measured biodiesel composition. The obtained results show some contradicting trends with biodiesel compared to diesel in the two engines. The ignition delay is lower for biodiesel by 0.9 degree in the turbocharged engine, while, it is higher by 1 degree in the naturally aspirated engine. The dynamic start of injection timings are advanced for biodiesel in both the engines but the advance is relatively higher in the turbocharged engine. The heat release rates with biodiesel are premixed and diffusion phase dominant in the naturally aspirated and turbocharged engines respectively. The peak cylinder pressures and nitric oxide emissions are generally higher for biodiesel in both the engines. The smoke emissions with biodiesel are higher and lower respectively in the naturally aspirated and turbocharged engines. Further, investigations on biodiesel composition effects on the engine characteristics revealed a strong correlation between DUm, SCSF and engine parameters. An increase in DUm of biodiesel is found to deteriorate combustion quality, resulting in poor engine performance and higher emissions. However, biodiesel having higher SCSF exhibit better engine performance along with lower nitric oxide and smoke emissions. Thus, an estimate of DUm and SCSF of candidate biodiesel fuels provides a first approximation of the extent of variations in engine parameters compared to diesel and thereby, helps in making a careful choice of biodiesel feedstock for automotive engine applications. Further, based on the results obtained with four different biodiesels in two different engine configurations, the present study reveals that the contradicting engine trends with biodiesel compared to diesel are more influenced by engine type variations rather than by biodiesel composition variations. © 2017 Elsevier Ltd

Applied Energy

Comparison of biodiesel fuel behavior in a heavy duty turbocharged and a light duty naturally aspirated engine

Effect of biodiesel, biodiesel binary blends, hydrogenated biodiesel and injection parameters on NOx and soot emissions in a turbocharged diesel engine

Journal	Data powered by TypesetFuel
Publisher	Data powered by TypesetElsevier BV
ISSN	0016-2361
Open Access	0