Frequency
converter
Water Inlet
Water Outlet
CHILLER
Temperature
Sensor
BASIN
Conderser
Water pump
Supply
130BB453.10
Illustration 5.18 Drives Used with a Cooling Tower Fan
For more information, consult the Danfoss supplier for the Cooling Tower Fan: Improving Fan Control on Cooling Towers
application note.
5.3.4.4 Condenser Pumps
Condenser water pumps are primarily used to circulate water through the condenser section of water-cooled chillers and
their associated cooling tower. The condenser water absorbs the heat from the condenser section and releases it into the
atmosphere in the cooling tower. These systems provide the most ecient means of creating chilled water. They are as
much as 20% more ecient than air cooled chillers.
VLT
®
solution
Drives can be added to condenser water pumps instead of balancing the pumps with a throttling valve or trimming the
pump impeller.
Using a drive instead of a throttling valve saves the energy that the valve would otherwise have absorbed. This change can
amount to savings of 15–20% or more. Trimming the pump impeller is irreversible. If the conditions change and higher ow
is required, the impeller must be replaced.
Product Features
VLT
®
HVAC Drive FC 102
34 Danfoss A/S © 11/2017 All rights reserved. MG16C302
55
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