Energy saving solutions for
data centres
Technologies to improve
the efficiency of cooling and
temperature-humidity control
systems
Data centre air conditioning
Air conditioning of data centres guarantees service continuity in these essential yet
extremely energy-intensive infrastructures. The types of systems used differ according
to local climatic conditions and the characteristics of the buildings.
It is estimated that this sector accounts for
• 50 years of innovations in around 1.5% of world energy demand***.
Sustainability and energy saving
cooling technology; objectives can be achieved through
• multiple product platforms continuous improvement of cooling
solutions, which starts by adopting
designed for energy
innovative high-efficiency technologies.
savings;
• specific knowledge of *** International Energy Agency (iea.org)
data centre applications
and collaboration
with manufacturers
in identifying the best
solution.
Evaporative cooling units
Adiabatic humidification systems
Energy saving Mission critical Flexibility
CAREL’s solutions are designed to For these types of mission-critical The energy-saving solutions can be
achieve the highest air conditioning applications, service continuity is adapted for use in all major application
efficiency, both at a component and essential, and therefore the solutions scenarios, including retrofits to improve
system level. need to be highly reliable both in terms the PUE of existing data centres.
of component quality and system
redundancy.
Monitoring systems
Rotary air-to-air heat exchangers
Plate air-to-air heat exchangers
Programmable controllers
Dampers
Steam humidifiers
Sensors and protection devices
Electrical panels Compressor inverters and electronic
expansion valves
%
Cybersecurity Connectivity Temperature and humidity control
All CAREL products are developed in All products come with various Keeping both these parameters within
accordance with the latest security connectivity options, while the the guidelines suggested by ASHRAE
standards. programmable controllers in particular TC 9.9 requires integrated solutions,
feature embedded solutions or optional especially in adiabatic cooling systems.
boards for communication using the
most widely-used protocols.
Solutions for direct freecooling + DEC
Systems that directly exploit the outside air, cooling it adiabatically with minimum
energy consumption and at the same time controlling the temperature and
humidity.
When the outside temperature is 1
• Maximum efficiency with sufficiently low, fresh outside air can be
freecooling and evaporative introduced via an AHU or the building’s
ventilation system. When the climatic
cooling; conditions are favourable, during
• Precise temperature and the summer the air can be cooled
adiabatically by increasing its humidity
humidity control; content (direct evaporative cooling);
• Flexible installation. during the winter the same system Reverse osmosis
maintains the minimum humidity level Water treatment is essential to minimise
by exploiting the recirculation of warm nozzle maintenance and avoid the
air. introduction of harmful dust.
2
3
4
humiFog multizone touch
High pressure adiabatic humidifier
that atomises water through nozzles
mounted on a rack into microscopic
SER100 outside air damper Programmable controller
droplets, ensuring very high efficiency
and precision. The inverter-driven pump The SER100 thermal break dampers with The programmable controller is the heart
and multi-zone configuration allow leakage class 4 are ideal for preventing of the system, controlling temperature
specific control of evaporative cooling in leakages and dispersion in the system; and humidity at the same time by
summer, and humidification in winter on numerous mounting options are available coordinating the operation of the various
the recirculated air. to suit both units and installations in the devices, using a vast library of functions
building’s structure. and CAREL’s know-how of psychrometric
processes.
4
3
2
Solutions for indirect freecooling + IEC
Systems that exploit evaporative cooling of the outside air cool the data centre air via
a heat exchanger.
Indirect evaporative cooling units use a
1 • Evaporative cooling extended to
heat exchanger to cool the recirculated
air in the data centre using outside multiple climatic conditions;
air; the indirect heat exchange avoids
• Air recirculation without
the introduction of contaminants and
exploits evaporative cooling of the introducing contaminants;
outside air, bringing it to saturation. • Built-in refrigerant circuit.
Units can also include a refrigerant B-BLUE air-to-air heat exchanger
circuit that supplements cooling when B-Blue is a heat exchanger with an
the environmental conditions are absorbent hydrophilic coating designed
unfavourable, or as a backup. to optimise heat exchange and enhance
evaporation due to surface wetting
(efficiency up to 15% higher than 4
traditional coatings); corrosion resistance
and water tightness (tested on 100%
of units manufactured) guarantee the
highest reliability.
KEC
2
Evaporative cooler that atomises water
using a highly-flexible nozzle distribution
3 system that can be adapted to the layout
of different units. IEC Special baffles
increase air turbulence for better droplet
distribution. The pump is variable-speed
High efficiency technologies c.pCO programmable controller and is controlled by an inverter (available
Essential for maximising the efficiency An integrated solution is essential for on a separate module for installation
of the built-in refrigerant circuit and selecting the best operating mode based flexibility) to optimise feedwater supply.
controlling air supply temperature and on outside conditions, between indirect
humidity. freecooling, IEC and mechanical air
conditioning.
3 2
1
Solutions for recirculated air systems with CRAC/
CRAH/IN ROW COOLING and COOLING WALL
Systems with traditional yet more efficient CRAC technologies using the hot aisle/
cold aisle layout.
Recirculation system solutions
• solutions suitable for more are very widespread, in particular
1
traditional layouts and those using chilled water; various
air distribution configurations and
retrofits; compartmentalisation make it possible
• high connectivity to field to increase the air supply temperatures,
devices and monitoring using freecooling to cool the water most c.pCO electronic controller and boss
of the year. Many recirculation systems one
systems; do not include humidifiers in the air The programmable controller ensures
• precise humidity control conditioning units due to the absence optimum management of any type of
of dehumidification, however the effect recirculation unit: the boss one option
with minimum energy of low outside humidity can lead to it is ideal for integration into supervisory
consumption. dangerous limits being reached in terms systems, feature high security of the
of electrostatic discharges, making a protocols and access control. The
humidification solution in the room flexibility of this family of controllers
necessary. means they are the most widely-used
controllers also on chiller units and
outdoor evaporative towers.
2
3
Serial probes
The adoption of large chilled water 4
coils such as in cooling walls makes
it necessary to measure temperature
and humidity in several points of the
air flow, so as to manage the devices Overpressure damper humiSonic direct
appropriately and ensure optimal air Extruded aluminium overpressure Ultrasonic humidifiers have a high
distribution. Modbus communication dampers with snap-on flanges and modulation capacity and produce
makes it easy to install numerous probes combined blade movement are ideal for microscopic droplets that are absorbed
on a single communication bus, with less fan wall configurations, as they prevent in very small distances. They are ideal for
wiring. the recirculation of air when no fan is various in-room installations, depending
operating. on the space available. Supplied with
water from reverse-osmosis, they feature
high reliability and low maintenance.
1
Solutions for liquid cooling and pumped refrigerant
systems
Latest-generation cooling systems, ideal for high power density servers.
The growth in high performance
computing is leading to a staggering • flexible solutions for high-
increase in the density of heat to be 1
density high performance
expelled, so much so that liquid cooling
solutions, both immersion and in contact, computing;
FLOE flood sensor
are needed to remove the heat. The two-
The use of water in units installed in data
• low energy consumption and
phase liquid or fluid that carries away
the heat makes it possible to produce centres, often close to critical equipment, possibility of heat recovery;
water at 40-50°C, meaning only indirect requires sensors that can detect leaks. • communication with IT
water freecooling can be used, but also standards.
the heat can be recovered and used
for heating. A similar concept involves
the use of fluids that evaporate at high
temperatures inside, and condense at
lower temperatures oustide, requiring a
simple pump to recirculate the liquid.
3
4
Chillbooster boss micro
c.pCO mini electronic controller The ideal solution to use evaporative The adoption of a liquid cooling solution
cooling to maximise is often based on a close interaction with
A flexible and compact solution for
the efficiency of liquid coolers or chillers the servers, and therefore the cooling
temperature control and for different
used as the primary source: system requires an edge device capable
types of cooling distribution units, as well
the modular and flexible distribution of communicating with DCIM systems,
as for management of he at recovery for
rack also makes retrofits on existing using the same security standards and
heating systems.
units possible. The atomisation sophisticated interfacing methods.
system is designed to minimise water Boss micro is the ideal solution for this
consumption. purpose, both compact and extremely
powerful.
CDU
1
4
centrifugal circulator axial
A complete range of edge devices for data centre
+3000054EN - 3.0 - 26.05.2023
monitoring
Solutions for the integration of power and cooling infrastructures, both at a unit and
system level, or remotely.
Third party
devices
IP
BACnet™/Modbus®/SNMP
DIN
DCIM optimise
Modbus®,
SNMP, BACnet™,
MQTT, XML
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