2 research outputs found
The operational parameters and emissions of portable generator after long-term operation on n-butanol
ArticleThe utilization of biofuels in spark ignition and compression ignition engines is the
trend of the recent time. The great expectations are inserted into n
-
butanol as a fuel, especially
for spark ignition engines. The short time use
of n
-
butanol in the SI (spark ignition) combustion
engine does not make a big problem (start of the cold engine, change of the air
-
fuel ratio). The
purpose of this contribution is the effect of long
-
term use of n
-
butanol as a fuel for SI engine. For
this
purpose the small portable generator was used. The harmful emissions, fuel consumption and
power of the generator was measured then the generator was operated for 300 hours on 100%
n
-
butanol with 80% of nominal load and the measurement was repeated. The g
enerator was
loaded with adjustable electrical resistance. As a reference fuel the petrol BA 95 with no bio
-
component was used. During the operation on n
-
butanol no technical problems occurred with the
generator. After 300 hours of operation on n
-
butanol t
he performance parameters slightly
decreased with little impact on production of harmful emissions components
Effect of sunflower and rapeseed oil on production of solid particles and performance of diesel engine
ArticleThe development of biofuels for compression ignition engines is heading primarily to
utilization of vegetable oils.
Combusting of 100% vegetable oil in unmodified CI engine is
usually not possible due to higher viscosity of the vegetable oil. In order to use 100% vegetable
oil in CI engine the oil needs to be preheated, esterified or hydrotreated. Alternatively, in orde
r
to use raw vegetable oil in CI engine without preheating it is possible to use vegetable oil
–
diesel
fuel blends or vegetable oil
–
butanol
–
diesel fuel blends in order to lower the viscosity of the
fuel. The contribution focuses on comparison of the e
ffect of sunflower and rapeseed vegetable
oils on operational parameters of the turbocharged compression ignition engine, especially on
production of solid particles.
The measurement was carried out according to standardized NRSC
test cycle. 5% and 20% con
centration of vegetable oils in diesel fuel were used as a test fuels for
the measurement while the diesel fuel was used as a reference. The count and size of solid
particles were measured by means of EEPS particle analyser. Based on the measured values it
can be stated that the slight increase of performance parameters occurred with strong effect on
emissions production, especially on production of solid particles