Danfoss VLT Flow Drive FC 111 Design Manual page 23

VLT® Flow Drive FC 111
Design Guide
W a t er I nlet
Illustration 13: Cooling Tower Fan
3.1.2.4 Condenser Pumps
Condenser water pumps are primarily used to circulate water through the condenser section of water cooled chillers and their asso-
ciated cooling tower. The condenser water absorbs the heat from the chiller's condenser section and releases it into the atmosphere
in the cooling tower. These systems are used to provide the most efficient means of creating chilled water, they are as much as 20%
more efficient than air cooled chillers.
The VLT Solution
Drives can be added to condenser water pumps instead of balancing the pumps with a throttling valve or trimming the pump im-
peller.
Using a drive instead of a throttling valve simply saves the energy that would have been absorbed by the valve. This can amount to
savings of 15–20% or more. Trimming the pump impeller is irreversible, thus if the conditions change and higher flow is required
the impeller must be replaced.
Danfoss A/S © 2021.04
BASIN
W a t er Outlet
Drive
T emper a tur e
S ensor
C onderser
W a t er pump
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