Emerson Liebert Economizer Solutions Fiche De Données
Fluid-Side Cooling Economization Strategy
Fluid-side economizers work in
conjunction with a heat rejection loop
− consisting of either a cooling tower,
evaporative cooler or drycooler − to
satisfy cooling requirements.
conjunction with a heat rejection loop
− consisting of either a cooling tower,
evaporative cooler or drycooler − to
satisfy cooling requirements.
These systems are incorporated into either
a chilled water or glycol-based cooling
system. For economizer operation, the fluid
used in the cooling system passes through
an additional heat exchanger to cool the
room air, reducing or eliminating the use of
cooling compressors and pumps.
a chilled water or glycol-based cooling
system. For economizer operation, the fluid
used in the cooling system passes through
an additional heat exchanger to cool the
room air, reducing or eliminating the use of
cooling compressors and pumps.
Energy-efficient Liebert technologies
are well suited to fluid-side cooling
economization.
are well suited to fluid-side cooling
economization.
4
How the liebert glyCool system Works
The self-contained Liebert GLYCOOL system comprises a compressorized Liebert glycol
system with advanced controls, a standard cooling coil, an additional “Econ-o-coil” free
cooling coil and a drycooler.
The self-contained Liebert GLYCOOL system comprises a compressorized Liebert glycol
system with advanced controls, a standard cooling coil, an additional “Econ-o-coil” free
cooling coil and a drycooler.
At ambient temperatures above the CRAC return temperature (less the drycooler
approach), the system functions as a normal glycol-cooled system. As outdoor
temperatures drop, the temperature of the fluid in the heat rejection loop drops also.
Once it is cold enough outside, the control opens the modulating valve to the Econ-o-coil
circuit. Depending on ambient conditions, the system either reduces or eliminates cooling
compressor and pump operation.
approach), the system functions as a normal glycol-cooled system. As outdoor
temperatures drop, the temperature of the fluid in the heat rejection loop drops also.
Once it is cold enough outside, the control opens the modulating valve to the Econ-o-coil
circuit. Depending on ambient conditions, the system either reduces or eliminates cooling
compressor and pump operation.
savings
The Liebert GLYCOOL system delivers an average annual energy savings of 20–50%.
The Liebert GLYCOOL system delivers an average annual energy savings of 20–50%.
GLYCOOL Cooling
for Liebert DS
TM
and Liebert Challenger
TM
3000
liebert glyCool system
Providing free cooling by using outside air through the Econ-o-coil circuit to maximize cooling
efficiencies
Providing free cooling by using outside air through the Econ-o-coil circuit to maximize cooling
efficiencies
Econ-o-coil rests
on A-frame coil
on A-frame coil
Glycol-cooled
condensers
and Paradenser
tubes
condensers
and Paradenser
tubes
A-frame coil inside
Compressors
Centrifugal
blower
blower
Liebert
Drycooler
Drycooler
Glycol
circulating
pump
circulating
pump