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Example, 5% reduction in output:
Qr = Q x 0,95
2
H1r = H1 x (0,95)
With the new values - Qr and H1r - repeat steps 2 - 5.
The combustion head should be adjusted in rela-
tion to the equivalent output Qe.
WARNING
Altitude
Average baro-
metric pressure
a.s.l.
m
mbar
0
1013
100
1000
200
989
300
978
400
966
500
955
600
944
700
932
800
921
900
910
1000
898
1200
878
1400
856
1600
836
1800
815
2000
794
4.7
Test boiler
The firing rates were obtained in special test boilers, according to
EN 267 regulations.
Fig. 4 indicates the diameter and length of the test combustion
chamber.
20098582
Technical description of the burner
0
5
10
1.087
1.068
1.049
1.073
1.054
1.035
1.061
1.042
1.024
1.050
1.031
1.013
1.037
1.018
1.000
1.025
1.007
0.989
1.013
0.995
0.977
1.000
0.982
0.965
0.988
0.971
0.954
0.977
0.959
0.942
0.964
0.946
0.930
0.942
0.925
0.909
0.919
0.902
0.886
0.897
0.881
0.866
0.875
0.859
0.844
0.852
0.837
0.822
10
mbar
mbar
H2
H3
H1
D388
F
Air temperature °C
15
20
1.031
1.013
1.017
1.000
1.006
0.989
0.995
0.978
0.983
0.966
0.972
0.955
0.960
0.944
0.948
0.932
0.937
0.921
0.926
0.910
0.914
0.898
0.893
0.878
0.871
0.856
0.851
0.836
0.829
0.815
0.808
0.794
Example:
delivery 25 kg/hour: diameter = 50 cm; length = 1 m.
Whenever the burner is operated in a much smaller commercial-
ly- available combustion chamber, a preliminary test should be
performed.
GB
A
Qe
Qe
25
30
40
0.996
0.980
0.948
0.983
0.967
0.936
0.972
0.956
0.926
0.962
0.946
0.916
0.950
0.934
0.904
0.939
0.923
0.894
0.928
0.913
0.884
0.916
0.901
0.872
0.906
0.891
0.862
0.895
0.880
0.852
0.883
0.868
0.841
0.863
0.849
0.822
0.842
0.828
0.801
0.822
0.808
0.783
0.801
0.788
0.763
0.781
0.768
0.743
D449
kW
kg/h
Fig. 3
Tab. E
Fig. 4
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