An Experimental Investigation of Sewage Sludge Gasification in a Fluidized Bed Reactor
Table 4
Mass balance, energy balance, and energetic efficiency parameters for tests I and II.
Test I
Test II
Mass (g)
Input %
Mass (g)
Input %
Mass balance
Inputs
1032.54
16.08
3618.27
22.91
4131.97
64.36
10733.92
67.96
389.73
6.07
1009.98
6.39
866
13.49
433
2.74
Outputs
126.16
19.65
238.06
1.51
115.3
1.80
114.57
0.73
2455.79
38.25
2854
18.07
2587.55
40.3
12588.54
79.69
Test I
Test II
Energy (MJ)
Power (W)
Energy (MJ)
Power (W)
Energy balance
Inputs
Fuel
64.0282
24253
166.2960
22533.3
Air
0.1745
66.1
0.6429
87.1
Heaters
1.2804
485
1.6421
222.5
Outputs
Lost
39.2756
14877.1
51.8074
7020.0
Gas
26.3075
9927.1
116.581
15822.9
Test I
Test II
Energetic efficiency
Hot gas efficiency (HGE)
0.41
0.70
Cold gas efficiency (CGE)
0.34
0.57
% lost with respect to inputs
0.60
0.31
% lost with respect to fuel
0.61
0.31
: air mass; dry fuel mass; : fuel moisture mass; : fresh bed mass; : ash from horizontal pass mass; : ash from cyclone mass; : removed bed mass; : raw produced gas mass.
