81
WATER-COOLED DEVICES
5.1.7 Coolant heating with water
Volumeowdependingonthetotalpowerdissipationandtemperaturedierencebe-
tweenforwardowandreturnow.
0
1
2
3
4
5
6
7
8
9
0
32
1
④
ΔT / K
PD_ges
1)
/ kW
Legend
Working area
①
5 l/min
②
10 l/min
③
12.5 l/min
④
15 l/min
Figure 33: Volume ow depending on the total power dissipation PD_ges and temperature dierence with
water-glycol mixture
1)
PD_ges can be higher than the power dissipation PD at rated operation due to overload, higher switching
frequency or sub-mounted braking resistores.
Theminimumvolumeowdependsonthepowerdissipation.
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