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3.8
Air side pressure drop (measured upstream of the damper with complete opening)
The pressure curves refer to the combustion head adjustment
conditions.
In the event that the supplied air has a temperature greater than
20°C and/or an altitude greater than 100 m. a.s.l., the pressure
drops of the head shown in the diagram are multiplied by the co-
efficient K
indicated in the Tab. E.
c
Example
Burnt output = 5000 kW - Altitude = 750 m. a.s.l. - Combustion air
temperature = 120 °C
From the diagram, for an output of 5000 kW, the total pressure
drop obtained at the head is equal to: p
tion air at 20 °C and 100 m. a.s.l. altitude).
A multiplicative coefficient can be found on the Tab. E, for com-
bustion air at 120 °C and at 750 m. a.s.l., equal to Kc = 1.449.
The total pressure drop of the burner head is:
p = p
x K
= 20 x 1.449 = 29 mbar.
20
c
Altitude
m. s.l.m.
0
0
0.920
100
0.932
500
0.976
750
1.007
1000
1.038
1250
1.069
1500
1.102
1750
1.130
2000
1.174
2250
1.206
2500
1.251
2750
1.284
3000
1.320
20169009
Technical description of the burner
= 20 mbar (combus-
20
20
40
60
0.988
1.055
1.122
1.000
1.069
1.137
1.047
1.119
1.190
1.080
1.154
1.228
1.114
1.190
1.266
1.147
1.226
1.304
1.182
1.263
1.344
1.213
1.295
1.378
1.260
1.346
1.432
1.294
1.382
1.471
1.343
1.434
1.526
1.378
1.472
1.566
1.417
1.514
1.610
60
50
40
30
20
10
0
K
c
Air temperature °C
80
100
120
1.190
1.257
1.325
1.205
1.273
1.342
1.262
1.333
1.405
1.302
1.375
1.449
1.342
1.418
1.494
1.382
1.460
1.539
1.425
1.505
1.586
1.461
1.544
1.626
1.518
1.604
1.690
1.559
1.647
1.736
1.618
1.709
1.801
1.660
1.754
1.848
1.707
1.804
1.901
10
GB
20176058
200°C
3000
4000
5000
Burner output - kW
140
160
180
1.392
1.459
1.527
1.410
1.478
1.547
1.477
1.548
1.620
1.523
1.596
1.670
1.570
1.646
1.722
1.617
1.695
1.774
1.667
1.747
1.828
1.709
1.792
1.875
1.776
1.862
1.948
1.824
1.912
2.001
1.893
1.984
2.076
1.942
2.036
2.130
1.997
2.094
2.191
6000
Fig. 3
200
1.594
1.615
1.691
1.744
1.798
1.852
1.909
1.957
2.034
2.039
2.168
2.224
2.287
Tab. E
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