User`s manual
60
Magtrol WB/PB DynamometersChapter 3 – Cooling
3.3 CLOSED-CIRCUIT COOLING SYSTEMS
The closed-circuit cooling system uses water-to-air or water-to-water heat exchangers, or a chiller.
This system is used when the water supply is restricted or when the water cannot be used for cooling
without prior treatment/filtering.
Note: It is recommended to use water specific additives to avoid
proliferation of living organisms, and to protect against corrosion
and mineral deposits.
3.3.1 e
xAmPle
A closed-circuit cooling system simply requires a water tank in which the heat exchange will take
place. The ideal operating temperature of the dynamometer is maintained by a temperature-regulated
valve on the dynamometer cooling water outlet.
4/215%0/7%2 30%%$
#OL DWATER
INL ET
0UMPWITH
WATERLEVEL
REGULATION
7ATER4ANK
6ALVEREGULATEDBYTHE
DYNAMOMETEROUTLETWATER
TEMPERATURE
Figure 3–2 Closed-circuit Cooling Example