This experimental
study focuses on unraveling the effects of compression ratio (CR) variation on
performance and emission characteristics of a variable compression ratio (VCR)
diesel engine under various loads. The engine was fueled with 100% sunflower biodiesel
(B100) and B100 with Ethylenediaminetetraacetic acid (EDTA, C10H16N2O8) additive
(B100+EDTA), separately, to determine fuel effect. Subsequent to determination
of fuel properties, effects of these two fuels were compared under 3 different
CRs. High hydrogen and oxygen contents, negligible chemical inactivity and high
cetane number (CN) made EDTA an attractive additive for B100 in the context of
engine characteristics. It was observed that, B100+EDTA depicted higher average
values of 24.3%, 25.7% and 26.5%
whereas they were 17.3%, 18.7% and 19.4% for B100 under CRs of 16, 17 and 18,
respectively. In terms of BSFC, average B100 values were 17.3, 16.1, 14.8
(kJ/kWh) whereas 10.1, 9.2, 7.9 (kJ/kWh) for B100+EDTA under CRs of 16, 17 and
18, respectively. Te
values were 265ºC, 252ºC and 234ºC for B100+EDTA and 296ºC, 281ºC and 267ºC for
B100 at CRs of 16, 17 and 18, respectively. CO values were 110, 103 and 96
(ppm) for B100; 82, 74 and 65 (ppm) for B100+EDTA under under in-question CRs.
UHC values of 124, 115 and 98 (ppm) for B100+EDTA; 141, 134 and 119 (ppm) for
B100 were obtained under CRs of 16, 17 and 18, respectively. CO2
emission values were 4.2%, 5.7% and 6.3% (by vol.) for B100+EDTA; 3.4%, 3.9%
and 5.1% for B100 under CRs of 16, 17 and 18, respectively. NOx
values were 170, 192 and 210 (ppm) for B100+EDTA; 104, 126 and 137 (ppm) for
B100 under CRs of 16, 17 and 18 respectively. Smoke
opacity values were 16%, 12% and 10% for B100+EDTA; 21%, 18% and 16% for B100
under CRs of 16, 17 and 18, respectively.
The author would like to thank Cukurova University, Department of Automotive Engineering, Fuel Analysis Laboratories and Marmara University Laboratories.
Primary Language | English |
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Subjects | Mechanical Engineering |
Journal Section | Article |
Authors | |
Publication Date | October 31, 2019 |
Submission Date | July 17, 2019 |
Published in Issue | Year 2019 Volume: 8 Issue: 3 |