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3.10
Air side pressure drop (detected upline of the damper with complete opening)
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.
a.s.l., the pressure drops of the head shown in the diagram are
multiplied by the coefficient K
Example:
Burnt output = 2000 kW - Altitude = 750 m. a.s.l. - Combustion air
temperature = 120 °C.
18
16
14
12
10
8
6
4
2
0
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
20169116
Technical description of the burner
indicated in Tab. G.
c
500
40
60
80
1.055
1.122
1.190
1.069
1.137
1.205
1.119
1.190
1.262
1.154
1.228
1.302
1.190
1.266
1.342
1.226
1.304
1.382
1.263
1.344
1.425
1.295
1.378
1.461
1.346
1.432
1.518
1.382
1.471
1.559
1.434
1.526
1.618
1.472
1.566
1.660
1.514
1.610
1.707
From the diagram, for an output of 2000 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. G 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
20
c
1000
1500
Burner output - kW
K
c
Air temperature °C
100
120
140
1.257
1.325
1.392
1.273
1.342
1.410
1.333
1.405
1.477
1.375
1.449
1.523
1.418
1.494
1.570
1.460
1.539
1.617
1.505
1.586
1.667
1.544
1.626
1.709
1.604
1.690
1.776
1.647
1.736
1.824
1.709
1.801
1.893
1.754
1.848
1.942
1.804
1.901
1.997
10
GB
20
= 11 x 1.449 = 18.94 mbar.
20155587
2000
2500
160
180
200
1.459
1.527
1.594
1.478
1.547
1.615
1.548
1.620
1.691
1.596
1.670
1.744
1.646
1.722
1.798
1.695
1.774
1.852
1.747
1.828
1.909
1.792
1.875
1.957
1.862
1.948
2.034
1.912
2.001
2.039
1.984
2.076
2.168
2.036
2.130
2.224
2.094
2.191
2.287
= 10 mbar (combus-
Fig. 5
220
250
1.662
1.763
1.683
1.786
1.763
1.870
1.818
1.928
1.874
1.988
1.930
2.048
1.990
2.111
2.040
2.164
2.120
2.249
2.177
2.310
2.259
2.397
2.318
2.460
2.384
2.529
Tab. G
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