Page 220 - Biofuels Refining and Performance

Ethanol and Methanol as Fuels in Internal Combustion Engines 203

80

BSFC (kg/kWh) 60 Petrol

40

20
Ethanol
Figure 7.3 Effect of speed on
BSFC (brake specific fuel con-
0 sumption).
2000 4000 6000 8000
Speed (rpm)

20

15 Petrol Ethanol
Thermal h 10

5

Figure 7.4 Effect of speed on
0 thermal efficiencies.
1000 3000 5000 7000 9000
Speed (rpm)

1.6
Ethanol

1.2
Torque (kJ) 0.8 Petrol

0.7

Figure 7.5 Effect of speed on the
0 torque.
0 2000 4000 6000 8000
Speed (rpm)