2.6.18 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 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, and they are as much as 20% more efficient than air cooled chillers.
2.6.19 The VLT Solution
Adjustable frequency drives can be added to condenser water pumps instead of balancing the pumps with a throttling
valve or trimming the pump impeller.
Using an adjustable frequency 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.
Frequency
converter
Water
Inlet
Water
Outlet
BASIN
Flow or pressure sensor
Condenser
Water pump
Throttling
valve
Supply
CHILLER
130BB452.10
Figure 2.14 Condenser Pumps
Product Overview Design Guide
22 Danfoss A/S © Rev. 2014-01-14 All rights reserved. MG18C522
22
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