7
CHAPTER
2
Burner description
2.5
Air side pressure drop
(taken upstream from the completely open air damper)
The pressure curves refer to the different adjustment conditions for the combustion head in accordance to the table on page 13.
Refer to
Paragraph 5.1
.
In the case of air supply at a higher temperature than 20°C and/or an altitude higher than 100 m. a.s.l., the pressure drop in the
head that is shown in the graph must be multiplied by the
K
c
coefficient as indicated in the table below.
Example
for
DB 4
Burnt output = 4000 kW - Altitude = 750 m. a.s.l. - Combustive air temperature = 120 °C
From the diagram, with an output of 7000 kW, a total head pressure drop is shown of:
p
20
= 20 mbar
(combustive air at 20 °C
and altitude 100 m. a.s.l.).
The table gives a multiplying coefficient, for combustive air at 120 °C and altitude 750 m. a.s.l., equal to
K
c
= 1.449.
The total pressure drop of the burner head is:
p
=
p
20
x
K
c
= 20 x 1.449 = 29 mbar.
Altitude
K
c
Air temperature °C
m. a.s.l.
0
20
40
60
80
100
120
140
160
180
200
220
250
0
0.920
0.988
1.055
1.122
1.190
1.257
1.325
1.392
1.459
1.527
1.594
1.662
1.763
100
0.932
1.000
1.069
1.137
1.205
1.273
1.342
1.410
1.478
1.547
1.615
1.683
1.786
500
0.976
1.047
1.119
1.190
1.262
1.333
1.405
1.477
1.548
1.620
1.691
1.763
1.870
750
1.007
1.080
1.154
1.228
1.302
1.375
1.449
1.523
1.596
1.670
1.744
1.818
1.928
1000
1.038
1.114
1.190
1.266
1.342
1.418
1.494
1.570
1.646
1.722
1.798
1.874
1.988
1250
1.069
1.147
1.226
1.304
1.382
1.460
1.539
1.617
1.695
1.774
1.852
1.930
2.048
1500
1.102
1.182
1.263
1.344
1.425
1.505
1.586
1.667
1.747
1.828
1.909
1.990
2.111
1750
1.130
1.213
1.295
1.378
1.461
1.544
1.626
1.709
1.792
1.875
1.957
2.040
2.164
2000
1.174
1.260
1.346
1.432
1.518
1.604
1.690
1.776
1.862
1.948
2.034
2.120
2.249
2250
1.206
1.294
1.382
1.471
1.559
1.647
1.736
1.824
1.912
2.001
2.039
2.177
2.310
2500
1.251
1.343
1.434
1.526
1.618
1.709
1.801
1.893
1.984
2.076
2.168
2.259
2.397
2750
1.284
1.378
1.472
1.566
1.660
1.754
1.848
1.942
2.036
2.130
2.224
2.318
2.460
3000
1.320
1.417
1.514
1.610
1.707
1.804
1.901
1.997
2.094
2.191
2.287
2.384
2.529
Burner output
Pb
[kW]
p
[mbar]
Fig. 7
60
50
40
30
20
10
250° C
D12016
Summary of Contents for DB3 SM C01 TC FS1 A0 T250
Page 2: ......
Page 22: ......
Page 42: ......
Page 43: ...1...
Page 52: ...10 3 3 4 12 1 2 3 9 10 13 12 1 1 2 5 4 3 3 20084515 12...
Page 53: ...11 4 4 1 D7543 C GF HPG LPG MM PA PGM PGm RG SRV VE VPS VR VS 0 5 4 bar 500 mbar 13...
Page 54: ...12 4 4 2 D9135 MB PA PGM SM UV UV TA TB...
Page 56: ...14 5 5 3 1 4 2 3 5 6 7 1 2 0 3 20 4 5 20 130 1 4 5 4 130 19 18 D1500 3 2 4 1 19 1 2 3 4 D1499...
Page 57: ...15 5 MAN 3 1 130 90 2 19 2 19 20 2 2...
Page 59: ...17 5 5 6 70 A 187 V 100 A c c 100 F 1V c c 5 7 1 2 3 4 5 1 2 3 4 5 6 D1143 23...
Page 60: ...18 6 6 1 1 2 3 VR VR VS VR...
Page 61: ...19 6...
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