1VERTIV™ - Liebert
®
EFC - UM - 10040805MAN_ENG - 30.03.2023
Liebert
®
EFC is Vertiv™ answer to the latest and future Data
Center needs.
The Data Center environment is growing constantly in terms of
cooling needs consequently asking for cooling solutions that
provide exactly what the servers need without wasting energy
overcooling as well as avoiding hot spots. Liebert
®
EFC as a result
of EC fans and air-to-air composite heat exchanger maximizes
as common cooling redundancy. Liebert
®
EFC results to be a top
load conditions.
Liebert
®
Liebert
®
EFC
air conditions:
During the cold season (winter operation mode) return air
from the data center is cooled down, leveraging the heat
exchange process with external cold air. There is no need
to run the evaporative system and the cooling capacity is
During the warm season (summer operation mode) the
evaporative system must run in order to saturate the air.
This enables the unit to cool the data center air even with
high external air temperatures. By saturating the air, the
dry bulb temperature can be reduced;
In the case of extreme external conditions, a Direct
Expansion (DX) system is available to provide additional
(Top-Up) cooling. As an alternative, the Chilled Water
(CW) coil can be installed. DX and CW systems are sized
to provide partial back up for the overall cooling load
minimum energy consumption.
Dry
Operation
WET
Operation
DX/CW
Integration
AIR-TO-AIR HEAT EXCHANGE
WITHOUT SPRAYING WATER
AIR-TO-AIR HEAT EXCHANGE VIA
THE SPRAYING OF WATER TO THE
EXTERNAL AIR SIDE
EXTERNAL AIR IS TOO HIGH TO HAVE
100% COOLING WITH EVAPORATIVE, THE
DX MODULE IS THUS INTEGRATED TO
COVER THE MISSING CAPACITY
Optional
External Temperature
Winter
Summer
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