Air Side Pressure Drop (Measured Upstream Of The Damper With Complete Opening) - Riello DB 4 SM C03 A0 TC FS1 FB T150 Installation, Use And Maintenance Instructions
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4.10
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. F.
c
Example:
burner output = 3500 kW - Altitude = 750 m. a.s.l. - Combustion
air temperature = 120 °C
Altitude
m. a.s.l.
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
Technical description of the burner
35
30
25
20
15
10
5
0
0
1000
2000
3000
Burner output Pb [kW]
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
From the diagram, for an output of 3500 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. F, 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
= 15 x 1.449 = 21.7 mbar.
20
c
DB4
4000
5000
6000
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
11
GB
= 15 mbar (combus-
20
S9505
DB6
7000
8000
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
Fig. 5
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. F
20117017
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