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4.8
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
20
0
0.920
0.988
100
0.932
1.000
500
0.976
1.047
750
1.007
1.080
1000
1.038
1.114
1250
1.069
1.147
1500
1.102
1.182
1750
1.130
1.213
2000
1.174
1.260
2250
1.206
1.294
2500
1.251
1.343
2750
1.284
1.378
3000
1.320
1.417
20124993
Technical description of the burner
= 20 mbar (combus-
20
30
40
50
1.021
1.055
1.089
1.034
1.069
1.103
1.083
1.119
1.155
1.117
1.154
1.191
1.152
1.190
1.228
1.186
1.226
1.265
1.223
1.263
1.304
1.254
1.295
1.337
1.303
1.346
1.389
1.338
1.382
1.427
1.389
1.434
1.480
1.425
1.472
1.519
1.465
1.514
1.562
60
50
40
30
20
10
0
3000
4000
K
c
Air temperature °C
60
70
80
1.122
1.156
1.190
1.137
1.171
1.205
1.190
1.226
1.262
1.228
1.265
1.302
1.266
1.304
1.342
1.304
1.343
1.382
1.344
1.384
1.425
1.378
1.419
1.461
1.432
1.475
1.518
1.471
1.515
1.559
1.526
1.572
1.618
1.566
1.613
1.660
1.610
1.659
1.707
10
GB
5000
6000
7000
Burner output - kW
90
100
120
1.223
1.257
1.325
1.239
1.273
1.342
1.298
1.333
1.405
1.338
1.375
1.449
1.380
1.418
1.494
1.421
1.460
1.539
1.465
1.505
1.586
1.502
1.544
1.626
1.561
1.604
1.690
1.603
1.647
1.736
1.664
1.709
1.801
1.707
1.754
1.848
1.755
1.804
1.901
S9534
8000
9000
Fig. 3
140
150
1.392
1.426
1.410
1.444
1.477
1.512
1.523
1.560
1.570
1.608
1.617
1.656
1.667
1.707
1.709
1.751
1.776
1.819
1.824
1.868
1.893
1.939
1.942
1.989
1.997
2.046
Tab. E
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