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 12.
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 6
Burnt output = 6000 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
= 40 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
= 40 x 1.449 = 58 mbar.
Altitude
K
c
Air temperature °C
m. a.s.l.
0
20
30
40
50
60
70
80
90
100
120
140
150
0
0.920
0.988
1.021
1.055
1.089
1.122
1.156
1.190
1.223
1.257
1.325
1.392
1.426
100
0.932
1.000
1.034
1.069
1.103
1.137
1.171
1.205
1.239
1.273
1.342
1.410
1.444
500
0.976
1.047
1.083
1.119
1.155
1.190
1.226
1.262
1.298
1.333
1.405
1.477
1.512
750
1.007
1.080
1.117
1.154
1.191
1.228
1.265
1.302
1.338
1.375
1.449
1.523
1.560
1000
1.038
1.114
1.152
1.190
1.228
1.266
1.304
1.342
1.380
1.418
1.494
1.570
1.608
1250
1.069
1.147
1.186
1.226
1.265
1.304
1.343
1.382
1.421
1.460
1.539
1.617
1.656
1500
1.102
1.182
1.223
1.263
1.304
1.344
1.384
1.425
1.465
1.505
1.586
1.667
1.707
1750
1.130
1.213
1.254
1.295
1.337
1.378
1.419
1.461
1.502
1.544
1.626
1.709
1.751
2000
1.174
1.260
1.303
1.346
1.389
1.432
1.475
1.518
1.561
1.604
1.690
1.776
1.819
2250
1.206
1.294
1.338
1.382
1.427
1.471
1.515
1.559
1.603
1.647
1.736
1.824
1.868
2500
1.251
1.343
1.389
1.434
1.480
1.526
1.572
1.618
1.664
1.709
1.801
1.893
1.939
2750
1.284
1.378
1.425
1.472
1.519
1.566
1.613
1.660
1.707
1.754
1.848
1.942
1.989
3000
1.320
1.417
1.465
1.514
1.562
1.610
1.659
1.707
1.755
1.804
1.901
1.997
2.046
0 1000 2000 4000 6000 8000
mbar
KW
5
10
15
20
25
30
35
40
D8326
Fig. 7
Burner output
Pb
[kW]
p
[m
bar
]
Summary of Contents for DB 4 SM BLU
Page 2: ......
Page 39: ...1...
Page 48: ...10 4 4 1 D7543 C GF HPG LPG MM PA PGM PGm RG SRV VE VPS VR VS 0 5 4 bar 500 mbar 12...
Page 49: ...11 4 4 2 DANGER WARNING MB PA PGM SM SO TA TB D7904 13...
Page 51: ...13 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 52: ...14 5 MAN 3 1 130 90 2 19 2 19 20 2 2...
Page 54: ...16 5 5 7 6 A 100 A 5 8 1 2 3 4 5 1 2 3 4 5 6 D3097 23 A...
Page 55: ...17 6 6 1 1 2 3 VR VR VS VR WARNING DANGER...
Page 56: ...18 6...
Page 57: ......
Page 58: ......
Page 59: ......
