Environmental Engineering Reference
In-Depth Information
20.0
Diesel
B50
B100
GNC
18.0
16.0
14.0
12.0
10.0
8.0
6.0
4.0
2.0
0.0
Household Collection
Transfer to Dupm
Dump
Approach
Fig. 9
CO
2
emissions results
8.0
Diesel
B50
B100
GNC
7.0
6.0
5.0
4.0
3.0
2.0
1.0
0.0
Household Collection
Transfer to Dupm
Dump
Approach
Fig. 10
Fuel consumption results
Table 3
Results for complete driving cycle
B50
B100
CNG
CO
g/km
2.528
1.521
1.369
5.044
HC
g/km
1.009
0.857
0.699
1.151
NO
x
g/km
18.185
24.783
25.538
3.807
PM
g/km
0.295
0.169
0.140
-
CO
2
g/km
1,859.067
2,105.778
2,164.077
2,017.089
Fuel
g/km
590.535
731.727
801.550
698.318
that CO
2
was increased with increasing amount of methyl ester in the blend. The CNG
vehicle results in lower CO
2
emissions than the diesels during Transfer to Dump and
Approach and slightly the same during the rest segments.
Fuel consumption presented an increase for biodiesel fuel blends in all categories.
These results are calculated using a carbon balance and measured emission data.
The heating value of the methyl ester and the blends was lower than the reference
diesel fuel, while the density was higher. Since the fuel is delivered to the cylinders
on a volumetric basis, a higher mass flow is pumped to the cylinders with the
biodiesel blends for the same fuel volume. Table
3
shows the results for a complete
driving cycle.
