Volume No. 4 Issue No.: 3 Page No.: 811-821 Jan.-Mar 2010

 

EXPERIMENTAL INVESTIGATION ON EFFECTS OF THE LOW HEAT REJECTION DIESEL ENGINE RUNNING ON JATROPHA METHYL ESTER

 

Mohamed Musthafa M.*, Sivapirakasam S.P. and Udayakumar M.

Department of Mechanical Engineering, National Institute of Technology, Trichy, Tamil Nadu (INDIA)

 

Received on : December 25, 2009

 

ABSTRACT

 

An important alternative for diesel fuel is methyl ester made of vegetable oils. Direct use of these fuels without modification in diesel engines causes some damages on the parts of the engines and also, the viscosity of the methyl ester fuels is quite higher than that of diesel fuel and their calorific value is lower. Therefore it is not possible to obtain more benefit. Coating combustion chamber parts with a ceramic material seems an effective solution for improving performance of these lower-quality fuels compared with diesel. The aim of this study, the cylinder head, cylinder liner, piston surface, exhaust, and inlet valves of a diesel engine were coated with the ceramic material by plasma spray method. Thermal barrier coatings are usually composed of aluminum oxide (Al2O3) as an oxidation resistant layer of 200 micron that provides thermal insulation toward metallic substrate. The engine that thermal barrier coating is applied is called low heat rejection (LHR) engine. Variances in performance and emission values of Jatropha methyl ester (JME) and diesel fuel mixtures were studied in the ceramic coated and uncoated engines under the same running conditions An increase in engine power and decrease in specific fuel consumption, as well as significant improvements in exhaust gas emissions and smoke density, were observed for all test fuels used in the coated engine compared with that of the uncoated engine.

 

Keywords : Low heat rejection engine, Thermal barrier coating, Biodiesel, Jatropha Methyl ester, Diesel, Emission

 

 

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