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Investigations on Low Heat Rejection Diesel Engine With Crude Jatropha Oil as an Alternate Fuel

[+] Author Affiliations
M. V. S. Murali Krishna, Tandur Rajashekar, Supriya Tiwari, T. Sujani

Chaitanya Bharathi Institute of Technology, Andhra Pradesh, India

C. M. Vara Prasad

Raja Mahendra College of Engineering, Andhra Pradesh, India

Paper No. IMECE2002-33078, pp. 595-606; 12 pages
doi:10.1115/IMECE2002-33078
From:
  • ASME 2002 International Mechanical Engineering Congress and Exposition
  • Advanced Energy Systems
  • New Orleans, Louisiana, USA, November 17–22, 2002
  • Conference Sponsors: Advanced Energy Systems Division
  • ISBN: 0-7918-3626-6 | eISBN: 0-7918-1691-5, 0-7918-1692-3, 0-7918-1693-1
  • Copyright © 2002 by ASME

abstract

Jatropha oil, a non-edible vegetable oil shows a greater potential for replacing conventional diesel fuel quite effectively, as its properties are compatible to that of diesel fuel. But low volatility and high viscosity of jatropha oil call for hot combustion chamber, which is provided by a low heat rejection diesel engine with threaded air gap piston and liner with superni-90 inserts. The performance of the engine with jatropha oil is obtained with different versions of the engine such as conventional engine and insulated engine at normal and preheat condition of the oil, with varying injection pressure and timing and compared to the engine with pure diesel operation at recommended injection pressure and timing. Increase of thermal efficiency of 18% and reduction of NOx levels by 5% are observed at optimized injection timing and at higher injection pressure with insulated engine at preheat condition of jatropha oil in comparison with pure diesel operation on conventional engine.

Copyright © 2002 by ASME

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