الفهرس 
Chapter 1: Introduction
Recommendations & ConclusionsOnly 14 pages are availabe for public view
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Abstract
The expected depletion of crude oil forced researchers to seek other alternative fuel sources where biodiesel pops up as the most suitable renewable fuel. Biodiesel is produced from many feedstocks and non-edible plants, but that produced from waste vegetable oil (WVO) is the most economic one. In this study, the effects of blending biodiesel produced from WVO with conventional diesel fuel on engine performance and emission characteristics were investigated. A traditional constant speed, DI, diesel engine is considered in this study to assess the possibility of using WVO biodiesel in such type of engines without any modifications. A baseline test with diesel fuel (B0) is first conducted and then five biodiesel/diesel fuel blends starting from 20% (B20) up to 100% (B100) biodiesel with 20% increments by volume was tested. Experiments showed that biodiesel blends give rise to BSFC and specific energy consumption mainly due to biodiesel lower heating value and higher density. Exhaust emissions showed an increase in CO2 and NOx values with a decrease in CO emissions since biodiesel blends possess oxygen, unlike diesel fuel, enhancing the combustion process. In conclusion, running old traditional, DI diesel engines with biodiesel extracted from WVO gives satisfactory performance and better emission characteristics which confirmed its suitability as a vital renewable fuel for conventional diesel.