Application of EGR for NOx Control in LPG - Diesel Dual Fuel CI Engine

Murthy, Krishna and Mahesha, G T and Rao , Shrinivasa B R and Samaga, B S (2010) Application of EGR for NOx Control in LPG - Diesel Dual Fuel CI Engine. International Journal of Advances in Thermal Sciences and Engineering, 1. pp. 37-43. ISSN 0976-6820

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Abstract

Due to projected increase in gasoline/ diesel vehicles use, even the strictest feasible emission controls on petroleum fuel vehicles will not eliminate total emissions. The use of petroleum fuels for transportation results in large quantities of pollutant emission from vehicles, refineries and fuel stations. Compression ignition engine with gaseous fuel inducted along with the air and liquid fuel injected towards the end of compression stroke forms a dual fuel engine. Dual fuel engines suffer with high NOx emissions at higher loads. Its formation is a temperature dependent phenomenon, and takes place when the temperature in the combustion chamber exceeds 1100o C. To reduce NOX emission, it is necessary to attend the root cause which favors the formation of NOX. i.e one has to reduce the peak combustion temperature. One of the promising methods to control NOx is Exhaust Gas Recirculation (EGR). Recirculating proper amount of cooled exhaust gas helps in reducing NOX, but appreciable increase in particulate emissions (PM), at high loads. Hence there should be a trade off between NOX reduction and smoke emission. To get the maximum benefit from this trade off, attempt is made in this work to find the optimum quantity of recirculation of exhaust gas. The present work is an experimental investigation on control of NOx emissions using EGR in a LPG-Diesel Dual fuel engine wherein LPG is inducted along with intake air and diesel is injected in the conventional manner. A four stroke variable compression ratio diesel engine is converted to operate as dual fuel engine with necessary modifications. Engine is operated with different percentages of LPG flow rates at different percentages (by mass) of EGR. It is observed that the NOx and particulate emissions are combindly influenced by EGR as well as LPG in the Dual fuel system. At 0.6kg/hr LPG flow rate and 15% EGR best performance was observed

Item Type: Article
Subjects: Engineering > MIT Manipal > Aeronautical and Automobile
Engineering > MIT Manipal > Mechanical and Manufacturing
Depositing User: MIT Library
Date Deposited: 21 Mar 2013 11:38
Last Modified: 22 Mar 2014 10:45
URI: http://eprints.manipal.edu/id/eprint/79226

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