Experimental Investigation of the Effects of N-Butanol Fumigation on Engine Performance and Exhaust Emissions in a Turbocharged Diesel Engine

Yıl 2017, Sayı: 210, 5 - 20, 15.12.2017

Zehra Şahin Orhan Nazım Aksu Orhan Durgun

Öz

In the
present study, the effects of n-butanol injection into intake air (n-butanol
fumigation, nBF) on the performance and exhaust emissions were experimentally
investigated in a Renault K9K 700 type turbocharged common-rail DI automotive
diesel engine. Experiments were performed under five different loads such (140
Nm, 125 Nm, 110 Nm, 95 Nm and 80 Nm) and at 3000 rpm engine speed, for various
n-butanol ratios. Here, n-butanol was injected into intake air by using an
adapted carburetor, which main nozzle section is adjustable to give
approximately 2 %, 4 %, 6 %, 8 % and 10 % (by vol.) n-butanol ratios. The test
results showed that effective power values for selected nBF ratios are nearly
equal to neat diesel fuel (NDF). However, break specific fuel consumption
increases and effective efficiency decreases considerably for all of the
operating conditions. NO_x emissions decrease, whereas THC and CO
increase significantly for all of the selected nBF ratios. Opacity increases
for high loads (140 Nm, 125 Nm and 110 Nm) and increment ratios of opacity for
high nBF ratios are higher than that of lower nBF ratios. Although opacity
decreases under selected low loads (95 Nm and 80 Nm) for low nBF ratios, it
starts to increase after 6 % nBF ratio. Also, total fuel cost for selected nBF ratios
is higher than NDF. In the present
study, the nBF results were also compared with the results of the
n-butanol-diesel fuel blends (nBDFBs), which previously investigated
experimentally by authors, for three different loads and three n-butanol
percentages.

Anahtar Kelimeler

Diesel engine, n-butanol fumigation, exhaust emissions, engine characteristics, cost analysis

Kaynakça

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