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INVESTIGATION ON IMPROVING THE THERMAL EFFICIENCY OF A MINI BOILER FIRED WITH STRAIGHT VEGETABLE OILS

ABSTRACT
In the present work, straight sunflower oil and rice bran oil blended with diesel have been used as fuel diesel in a mini boiler. The thermal efficiency of the boiler and emission levels in the exhaust gases have been investigated by burning the oil blends of varying proportions ranging from 0 to 50 %. An additional air supply system and compressed air atomization of fuel with a new burner have been used to improve the thermal efficiency of the mini boiler. Results revealed that the additional air supply improved the thermal efficiency upto 7 % and reduced the CO and HC emission upto 40 %. The use of compressed air atomization further increased the thermal efficiency upto 4 % and reduced the CO and HC emission upto 70 %.
KEYWORDS
PAPER SUBMITTED: 2018-01-26
PAPER REVISED: 2018-07-30
PAPER ACCEPTED: 2018-08-13
PUBLISHED ONLINE: 2018-09-29
DOI REFERENCE: https://doi.org/10.2298/TSCI180126243P
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2020, VOLUME 24, ISSUE Issue 2, PAGES [713 - 722]
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© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence