Page 231 - Biofuels Refining and Performance

214 Chapter Seven

60 Lean 60
Rich R = 13
c
50 Methanol 50 R c = 8.2
Brake power (kW) 40 Petrol Brake power (kW) 40 Methanol

30
30
20

10
10 20
Petrol (R = 8.2)
c
0
0.7 0.8 0.9 1.0 1.1 1.2 1.3 0 1000 2000 3000 4000 5000 6000
Equivalence ratio Speed (rpm)
(a) (b)
Figure 7.14 Effect of (a) equivalence ratio and (b) speed on brake power.

14
Petrol (R c = 8.2)
13
BSFC (10 3 kJ/kWh) 12

11
R c
10
Methanol 8.2
13
9
Figure 7.15 Effect of speed on
8 BSFC.
2000 4000 6000
Speed (rpm)

0.9
Methanol
Volumetric h 0.8 Petrol

0.7
Full load
Figure 7.16 Effect of speed on
0 1000 2000 3000 4000 5000 6000 volumetric efficiency.
Speed