Siemens SINAMICS S120 Equipment Manual page 269

Example of control of the coolant temperature depending on the relative humidity and the ambient
temperature
The temperature correction value delta T
maintain the temperature setpoint (T
humidity plus 4° C above the dew point.
Coolant temperature setpoint = ambient temperature + Δ TL
Table 9- 7 ΔT depends on the humidity
L
Relative humidity [%]
[° C]
1)
Delta T [° C]
2)
L
Temperature difference to the dew point
1)
Dew point plus 4° C
2)
If delta T
coolant temperature.
Figure 9-15
Water-cooled chassis power units for common cooling circuits
Manual, 08/2017, 6SL3097-4AM10-0BP0
Cooling circuit, coolant properties and protection against condensation
20 30 40
25 18 15
-21 -14 -11
(ΔT ) is now added to the ambient temperature this provides the setpoint for the
L L
Examples of the minimum coolant temperature setpoint depending on the humidity of 20,
30 and 40° C ambient temperature (dew point plus 4° C)
(ΔT ) is added to the ambient temperature to
L L
) for the coolant. The value depends on the relative
set
50 60 70
12 9 7
-8 -5 -3
9.5 Examples of coolant control
80 85 90
4 3 2
0 +1 +2
95 100
1 0
+3 +4
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