Abstract:
This work presents technical performance
measurements of field biogas with pure jatropha oildiesel blends in a dual fuel diesel engine generator.
Experimental tests of three performance parameters
(thermal efficiency, volumetric efficiency and air
excess ratio) were conducted by using biogas and
jatropha oil - diesel blends (i.e. 5%, 10%, 20%, 30%,
40% and 50% jatropha oil/diesel). Accordingly,
reference performance measurements of using diesel
and the blends showed similar performance results in
all the measured parameters. In the subsequent dual
fuel operation, the thermal efficiency of all blends
performs on an average of 31% at higher loads in
similar result with the diesel (31.5%). The volumetric
efficiency of J10 +Biogas is 92% among the blends
which is comparable to that of the diesel and the
other blends with biogas are in ranges of 80% at
lower load and about 60% at higher loads, where the
diesel has got 96% and 81% at lower and higher
loads respectively. Air excess ratio of blends showed
high reduction than the diesel: the highest ratio
(4.37) is observed at lower load by using J10+Biogas
and the lowest ratio (1) is resulted by J40+Biogas at
higher load. The highest value for diesel is 6.17 at
lower load and 1.8 at higher load.
