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4.10
Air side pressure drop (detected upline of the damper with complete opening)
m bar
The pressure curves refer to the combustion head adjustment
conditions according. In the event that the supplied air has a tem-
perature greater than 20°C and/or an altitude greater than 100 m.
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
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).
In Tab. E there is a multiplier coefficient, for combustion air at
120 °C and an altitude of 750 m. s.l.m., equal to Kc = 1.449 .
The total pressure drop of the burner head is:
∆p = ∆p
x K
= 10 x 1.449 = 14,49 mbar.
20
c
Technical description of the burner
60
50
40
30
20
10
0
2000
4000
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
= 10 mbar (combus-
20
6000
8000
10000
a.s.l., the pressure drops of the head shown in the diagram are
multiplied by the coefficient K
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
D3977
12000 14000
KW
indicated in Tab. E.
c
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. E
20119307
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