ENERGY
Alan Beresford,
Managing Director
of EcoCooling on
a new Evaporative
Cooling Free Air
based cooling
system suitable for
small to medium
sized server rooms
and data centres.
REDUCE SERVER ROOM
COOLING ENERGY BY 90%
onventional chillers and without the need for energy intensive modern standards for server room
C
computer room air refrigeration. equipment have changed substantially
conditioners can consume as and equipment is now designed to
much electricity as the POTENTIAL SAVINGS operate within a wide range of
servers. Every kW of installed It is possible to cool servers by simply temperature. A typical manufacturer’s
equipment can cost up to £1000 per year feeding fresh air to the server intakes and specification is 10° to 35°C. The latest
to keep cool. In some cases the total life exhausting the hot air to the outside. This ASHRAE guide gives a recommended
cost of cooling a server exceeds its is referred to in the industry as an air side operating range of 18° to 27°C. From this
original cost. economizer. The use of this is limited to it can be seen that the provision of
EcoCooling has developed a fresh the time the ambient outside temperature expensive close control computer room
air based system utilising evaporative is under the target temperature for the cooling equipment with a target of
cooling which can reduce the energy building otherwise refrigeration has to be 21+/1°C is unnecessary. Where older
used for cooling by up to 90%. Instead used. equipment exists, particularly mainframes,
of using refrigeration the EcoCooling EcoCooling has taken this concept close control is normally still required.
system uses a free air ventilation system and added evaporative cooling to the Modern equipment is also very
with evaporative cooling. Air to the process thus removing the need for any tolerant of changes in relative humidity.
server room never exceeds 22°C and refrigeration and so reducing costs and Close control was required where paper
so fully temperature compliant conditions carbon impact dramatically. tape and magnetic tape storage systems
are achieved throughout the year – This has been made possible because were present, but these tape systems are
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SUSTAINABLE FM | NOVEMBER/DECEMBER 2009
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