Abstract:
Jatropha Biodiesel was tested in a single cylinder direct-injection, water cooled
diesel engine to investigate the operational parameters of a small capacity diesel
engine under five engine loads, constant speed test. The jatropha oil is used as a
non edible oil to produce the biodiesel. The investigated blends were B0, B25,
B50, B75 and B100, where (B#) denotes bio-diesel fuel volume percentage in
diesel oil. The jatropha biodiesel was prepared locally in Sudan, specifications of
which are given with reference to Petroleum Laboratories, Research and Studies
Centre, Sudan. Each blend was tested on a short term basis and the results linked
to ignition delay effect, a good firing was attained with the engine at various
blends of jatropha bio-diesel blends in diesel oil fuel up to Bio-100 (pure biodiesel).
Concerning ignition delay of the engine, which is a measure of ignition
quality, it is less with low percentages of bio-fuel blends than that of high
percentages. Finally it has been shown that blend (Bio75) was selected as a good
blend since it has less mechanical friction loss, stability in exhaust heat loss,
relatively good mechanical efficiency and, high stability in cooling engine heat
loss.
