Page 203 - Energy from Toxic Organic Waste for Heat and Power Generation

Power Generation From Renewable Energy Sources 181

Speed: 1500 RPM, CR: 17.5
600 Inj.timing: 27 bTDC, Biomass: Babul wood
Injector: For diesel 3 hole, 0.2 mm, for HOME 4hole, 0.3 mm
IOP: For diesel 205 bar, for HOME 230 bar
500
Exhaust gas temperature (°C) 400 Diesel-PG (HCC)
Carburetor: Parallel flow gas entry

300

200
HOME-PG (HCC)
HOME+FO10-PG (RCC)
100
HOME+FO20-PG (RCC)
HOME+FO30-PG (RCC)
0
0.00 0.74 1.48 2.22 2.96 3.70
Brake power (kW)
Fig. 11.21 Effect of combustion chamber shape and fuel oil addition on exhaust gas
temperature.

higher combustion temperature with improved burning of fuel combina-
tions during the premixed combustion phase, and this favorable condition
results in higher power output and efficiency. The EGT values for HOME-
producer gas (HCC) and HOME-producer gas (RCC) operation with
10%, 20%, and 30% fuel oil were found to be 460°C, 445°C, 432°C, and
418°C, respectively, compared to 405°C for diesel-PG operation (HCC).

11.8.2 Emission Characteristics
Different emission parameter measurements during the dual, tri-fuel mode
of operation are presented in the subsequent section.
Fig. 11.22 presents the variation of smoke opacity with brake power.
Diesel-PG(HCC) combination always showed decreased smoke levels com-
pared with other fuel combinations tested. It could be attributed to re-
duced combustion temperature caused by the presence of fatty acids in
HOME, improper mixing rates, and reduced oxidation during combus-
tion of HOME-PG combination. But during tri-fuel operation, it is ob-
served that, with addition of fuel oil in HOME and RCC operation, results
showed lower smoke levels compared to HOME-PG (HCC) operation.
This could be attributed to addition of fuel oil in HOME, which increases
the combustion temperature caused by improved energy content, volatility
of HOME, and enhances the mixing rates facilitated by RCC. In addi-
tion, fuel distribution is better and spreading of fuel may also be widened.