Environmental Engineering Reference
In-Depth Information
6
4
3
5
9
8
10
11
7
1
2
2. Dynamometer
1. Test engine
3. Biodiesel tank
4. Burette
5. Fuel filter
6. Air surge tank
7. TDC pickup
8. Pressure transducer
9. Charge amplifier
10. Analog to digital
converter card
11. Computer
FIGure 25.4
Experimental setup.
taBle 25.4
Properties of different Biodiesel Fuels
Iodine value
(g iodine/100
g oil sample)
heating value
(mJ/kg)
density (kg/m
3
)
cetane number
ROME
885
39.5
47.8
160
LOME
882
39.3
51.0
140
KOME
878
39.5
52.0
95
NOME
876
39.8
58.7
83
MOME
875
40.5
61.4
65
ROME, rubberseed oil methyl ester; LOME, linseed oil methyl ester; KOME, karanja oil methyl ester;
NOME, neem oil methyl ester; MOME, mahua oil methyl ester.
25.4.1.1 density
The density of a fuel shows how close the molecules are packed in the structure. A higher-density
fuel has a more closely packed structure than a lower-density fuel. Fuel density is commonly
expressed in kilograms per cubic meter. The greater the fuel density, the greater the mass of fuel that
can be stored in a given tank and the greater the mass of fuel than can be pumped for a given pump.
The density of a fuel affects dynamic injection timing, ignition delay, and thereby NOx emis-
sions. However, these properties are uncertatin indications of fuel quality unless correlated with
