Improving payback while selling mortgages Yorkshire Building
Society invests in an energy saving cooling solution
All businesses need to keep an eye on costs, but when
an organisation is answerable to its members, keeping
costs down is ever more critical.
Meeting increasing heat loads and rising fuel costs head
on, the Yorkshire Building Society (YBS) has worked with
Airedale, to reduce building energy costs by replacing
an existing, less efficient chiller with Airedale’s low
energy free-cooling technology in its main call centre
offices.
YBS is the fourth largest building society in the UK,
with 1.8 million members, assets of £16.3 billion and
131 branches across the UK. It prides itself on being
one of the most cost-efficient building societies with
an on-going commitment to the environment. Based in
Bradford, West Yorkshire, the YBS head office and main
call centre are part of two purpose-built £40 million
developments, employing over 1000 staff.
Representing £10 million of this investment, the
4-storey call centre accommodates workstations for 300
people; refreshment and staff comfort zones and a data
centre cooled by two AlphaCool close control units. The
3,200 m² of operational space in this sealed building is
now fully utilised, with people and computers creating a
high heat gain. In this busy, business critical
application, calls are constantly received from
branches, investors and borrowers twelve hours a day,
six days a week and during this time, continuous
business operation is crucial.
With the call centre at full capacity, the existing,
standard chiller was unable to cope with the increasing
heat load and maintain temperatures at the required 23
ºC setpoint, leading to uncomfortable working conditions
for the staff.
Yorkshire Building Society Premises Engineer Steven Ward
wrote the specification for an Ultima FreeCool (UFC) 500
kW dual-circuit Chiller: “Quality was important but
energy efficiency was the crucial factor and Airedale
proved that its free-cooling chiller can save energy and
is the right system for us. The initial purchase price
is far outweighed by the savings we can make on running
costs. Anything that improves payback is of interest to
the Society.”
Typically saving 35%* of the energy used by a
conventional air-cooled liquid chiller, the UFC uses a
free-cooling cycle to reduce the need for mechanical
cooling, giving priority to free-cooling as soon as the
ambient temperature is 1ºC less than the return water.
In the evenings when the call centre is open until 8pm
and ambient temperatures are lower, energy consumption
can be reduced further. During the coldest part of the
year, free-cooling can totally satisfy the cooling load,
saving energy otherwise used in the mechanical operation
of the compressors, evaporator and fans. For maximum
energy saving the UFC can operate on simultaneous
mechanical and free-cooling for up to 50% of the year
and only needs to operate completely on mechanical
cooling for about 38% of the year.
* Based on Met. Office figures for London, UK
Adds Steven Ward: “We lacked space for two chillers as
run and stand-by, but the UFC allows us to have one
chiller with twin refrigeration circuits, giving us a
complete separate system as a back-up.”
With the minimum of interruption to the operation of the
call centre, Mitton Mechanical Services conducted the
lifting operation and installation work after
temporarily removing structural steelwork and extracting
the old chiller.
Keen on using an equipment manufacturer’s own service
team and, satisfied with the way Airedale Service
Engineers have looked after the two AlphaCool Close
Control units, the Society has had no hesitation in
awarding Airedale the contract to maintain the two
Ultima chillers with the same quality 24/7 call-out
service.
Email:
celia.sharp@airedale.com
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Tel : 01622 745333
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