Euro-C 4000-JLGBEN
28/31
11.1 By-pass requirements
11.1.1
Referring to section 4.2.0, a by-pass
duct in parallel with the heat exchanger
enclosure might be required.
11.1.2
Such by-pass duct might also be
required to reduce the pressure loss
over the heating section, particularly at
higher airflows.
11.1.3
When a by-pass duct is applied, a
portion of the total airflow is guided
through the by-pass duct and the
remaining airflow is guided through the
heat exchanger enclosure.
11.1.4
The by-pass duct dimensions must be
properly determined in order to ensure
that the airflow through the heat
exchanger enclosure always meets the
minimum airflow requirements as
mentioned in table 7
Table 7
Model
V (m
³
)
4011
1465
4015
1940
4018
2270
4024
2880
4030
3290
4036
5281
4047
6344
4060
8093
4072
9600
4100
16000
11.2 Calculation of recommended maximum
by-pass
11.2.1
This calculation is applicable for total
airflow conditions above V (table 7).
A) The by-pass can either be mounted
on top of the heat exchanger or
besides the heat exchanger as shown
in figure 16.
The recommended maximum by-pass
dimensions for a given air flow (V
tot
)
can be calculated as follows : (V
tot
is
the air flow expressed in m³/s).
a)
By-pass besides heat exchanger
:
Model
factor R1
factor R2
4011
782.6
-318.4
4015
631.4
-340.2
4018
442.4
-279.0
4024
460.4
-368.3
4030
409.0
-373.6
4036
409.3
-600.3
4047
182.5
-321.6
4060
230.0
-517.1
4072
164.2
-437.4
4100
92.2
-410.4
?
Dimension C (mm) = (R1 x V
tot)
+ R2
b) By-pass on top of heat exchanger :
Model
factor R1
factor R2
4011
495.0
-201.5
4015
528.1
-284.7
4018
433.4
-273.3
4024
356.4
-285.2
4030
362.5
-331.5
4036
459.4
-673.9
4047
246.2
-433.7
4060
168.5
-378.8
4072
144.4
-384.9
4100
46.1
-205.2
4
Dimension D (mm) = (R1 x V
tot)
+
R2
B) Example :
EURO-C 4072
with :
- total air flow = 5.0m³/s = 18000 m³/h
- by-pass besides heat exchanger
Result :
- dimension A
= 836mm
- R1
= 164.
20
- R2
= -437.
40
- dimension C
= (164.
20
x 5.
00
) – 437.
40
4
C = 383.
60
mm
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...
