Euro-C 4000-JLGBEN
13/31
4.1.2
Maximum airflow
Special attention must be given to ensure
that the temperature rise of the air,
passing through the enclosure (duct
channel) around the heat exchanger
tubes, is high enough to avoid
condensation forming within the tubes.
This condensation forming could occur
by super cooling of the products of
combustion. Such condensation can be
the source of severe corrosion and
damage to tubes or part of the tubes.
Figure 6 indicates the probability of
condensation forming within the tubes
reference :
-
the temperature rise of the air
through the enclosure around the
tubes (see table 1- fig. 4).
-
the inlet air temperature passing over
the heat exchanger
In function of the expected minimum
inlet air temperature, the minimum
required temperature rise (to avoid
condensation) must be derived from the
chart shown in figure 6.
Example
•
expected minimum inlet temperature = -5°C
•
minimum required temperature rise shown on
the chart = +13°K
Table 2 indicates the heat output (kW) of the
different models.
The maximum allowable airflow
[
through the
enclosure (duct channel) around the tubes
]
can
be calculated as follows :
0,3423
minimum
T
1000
(kW)
input
heat
(m³/h)
max
V
×
×
=
?
Example :
<
Tmin = 13K
model 4072 at 100% heat input : 72,00kW
results into Vmax = 16180m³/h
Remark
:
For air heaters with the option 2 stage gas valve
(50% minimum heat input) or the option
modulating gas valve (30% minimum heat input)
attention must be given to determine the
maximum allowable airflow in function of the
appropriate heat input.
Figure 6
Dew-point occurrence chart (condensation zone)
¦
¦
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Содержание EURO-C 4000 DJL
Страница 5: ...Euro C 4000 JLGBEN 5 31 Figure 1 Dimensions EURO C 4011 15 RJL DJL Fig 1 A Fig 1 B...
Страница 6: ...Euro C 4000 JLGBEN 6 31 Fig 1 C...
Страница 7: ...Euro C 4000 JLGBEN 7 31 Figure 2 Dimensions EURO C 4018 72 RJL DJL Fig 2 A Fig 2 B...
Страница 8: ...Euro C 4000 JLGBEN 8 31 Fig 2 C...
Страница 9: ...Euro C 4000 JLGBEN 9 31 Figure 3 Dimensions EURO C 4100 RJL DJL Fig 3 A Fig 3 B...
Страница 10: ...Euro C 4000 JLGBEN 10 31 Fig 3 C...
Страница 18: ...Euro C 4000 JLGBEN 18 31 Figure 8a models 4011 72 Figure 8b model 4100...
Страница 19: ...Euro C 4000 JLGBEN 19 31 Figure 8c all models Figure 9a models 4011 72...
Страница 22: ...Euro C 4000 JLGBEN 22 31 Figure 10b MODELS 4011 72 MODEL 4100...
Страница 24: ...Euro C 4000 JLGBEN 24 31 Figure 12 Models 4011 72 Model 4100...
