The first combined cooling and power (CCP) units to be supplied to a 'telehouse'
- data and telecommunications switching centre - have just been
shipped to site by engineering company Brotherhood Aircogen.
The units have been built under a
multi-million pound contract from telecoms firm 186k Limited awarded
to Lattice Energy Services in partnership with Brotherhood Aircogen.
The partners are to provide secure, cost effective energy to new
telehouses at Hemel Hempstead and Bristol in the UK. These will be the
world's first deployments of CCP in this reliability-critical
Telehouses require electrical energy
and air conditioning (cooling) in broadly equal measure. This is
normally provided at poor overall energy efficiency because of the
high energy cost of electricity-based air conditioning.
However, the CCP system being
installed for 186k eliminates the majority of the air conditioning
power needs, reducing the overall energy demand by around 22 per cent.
The ratio of cooling and power produced by CCP very closely matches
the site requirements.
Based on Aircogen Nimbus CHP (combined
heat and power) equipment, close-coupled to absorption chillers, the
systems guarantee 99.999 per cent reliability of electricity supply -
vital for round the clock, 365 days per year operation. A total of
four 1 MW electrical output CCP units is being installed at Hemel
Hempstead and two 660 kW units are being installed at Bristol.
The use of additional cooling capacity
to back up the CCP system provides assurance of the maintenance of
building and equipment temperatures through climatic extremes.
The environmental benefits of the CCP
system, which include reduction of CO2 emissions by over 20 per cent,
provide a number of tax advantages including Climate Change Levy
exemption and enhanced capital allowances. Together with the avoided
cost of standby generation and electric air conditioning, these
provide significantly lower lifetime costs for the installed system.
Lattice Energy Services is managing
installation of the telehouse CCP systems which it will own and
operate under a long term energy supply contract with 186k.
Brotherhood Aircogen is designing and building the systems and will
ensure their reliable, efficient and cost effective long term