User`s manual
59
Magtrol WB/PB Dynamometers
Chapter 3 – Cooling
3.2 OPEN-CIRCUIT COOLING SYSTEMS
In an open-circuit cooling system, the necessary water comes directly from the main water distribution
system (faucet), passes through the dynamometer, and is then disposed of (down a drain). The
advantage of this type of system is its low installation cost. This solution is acceptable if there are
no restrictions on water supply and if the available water is clean.
3.2.1 e
xAmPle
The simplest example of an open-circuit cooling system is a clean water supply and flow rate regulation
by means of a tap. The dynamometer water outlet should be equipped with a thermometer and the
flow rate must be adjusted in order to maintain the outlet water temperature between 40 °C and 50
°C (resp. 100 °F to 120 °F).
Caution: the tap should always remain open and running when the
dynamometer is in use.
4/215%0/7%2 30%%$
#OL DWATER
INL ET
#OOLING7ATER/UTLET
#OOLING7ATER)NLET
Figure 3–1 Open-circuit Cooling Example