Comparative Studies on Exhaust Emissions from a High Grade Low Heat Rejection Diesel Engine with Carbureted Alcohol and Crude Jatropha Oil
V.V.R. Seshagiri Rao1, T. Kishen Kumar Reddy2  M.V.S. Murali Krishna3, P.V. Krishna Murthy4

1V.V, R. Sesha giri Rao, Mechanical Engineering Department, Chaitanya Bharathi Institute of Technology Gandipet, Hyderabad, India.
2T.K.K. Reddy, Mechanical Engineering Department, J.N.T.U. College of Engineering, Kukatpally, Hyderabad, India.
3M.V.S. Murali Krishna, Mechanical Engineering Department, Chaitanya Bharathi Institute of Technology.India.
4P.V.K. Murthy, Mechanical Engineering Depaartment, Jaya Prakash Narayan Educational Society Group of Institutions, Bhageerath Colony, Mahabubnagar, India.
Manuscript received on April 03, 2013. | Revised Manuscript received on April 27, 2013. | Manuscript published on May 05, 2013. | PP: 1-5 | Volume-3, Issue-2, May 2013. | Retrieval Number: B1420053213/2013©BEIESP
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Abstract: Investigations were carried out to study the exhaust emissions from high grade low heat rejection (LHR) diesel engine consisting of air gap insulated piston with 3-mm air gap with superni (an alloy of nickel) crown, air gap insulated liner with superni insert and ceramic coated cylinder head with normal temperature condition of crude jatropha oil and carbureted alcohol (ethanol / methanol) with varied injection timing and injection pressure and compared with methanol operation over ethanol operation and also with pure diesel operation on conventional engine (CE). Exhaust emissions of smoke and oxides of nitrogen (NOx) were recorded by AVL Smoke meter and Netel Chromatograph NOx analyzer respectively at different values of brake mean effective pressure (BMEP). Aldehydes were measured by dinitrophenyl hydrazine (DNPH) method at peak load operation of the engine. Smoke levels and NOx levels decreased by 47% 12% respectively with LHR engine at 27o bTDC and at an injection pressure of 190 bar with methanol operation in comparison with pure diesel operation on CE.
Keywords: Crude Vegetable Oil, Methanol, Ethanol, CE, LHR engine, Emissions and Combustion characteristics.