CLIENT ENERGY MANAGEMENT BRITISH LAND
lRepairing a broken sensor that had been causing constant gas use for heating
lReprogramming the Building Management System (BMS) to fix constant gas use for cooling
l Identifying and fixing faults with the BMS programming for air handling
lMaximising the use of external air for free cooling
lReprogramming the BMS to facilitate weather compensation, with a new 15.5°C set-point
l Introducing economy cycles and new set-points for summer and winter heating and cooling schedules.
In most buildings with the optimisation process, British Land is seeing savings ahead of schedule, with a reduction of 12% in base-building consumption (common areas and shared services) from 1 April 2011 to 31 March 2012 (see bar chart left). In existing buildings, this has saved 11 million kWh, over 4,100 tonnes of carbon and almost £610,000. ‘In the two new developments where
we have installed the energy monitoring system, we do not have the same
338 Euston Road
Base-building energy use in the seven existing buildings with the new monitoring system and optimisation process
14 12 10 8 6 4 2 0
-20% 17%* -5% 17% -25% -17%
Exchange House
The Broadgate Tower
201 Bishopgate
338 Euston Road
2010/11 2011/12
* At the Broadgate Tower (where development completed in 2008), an increase in people based in the building has led to more energy use. British Land is working closely with occupiers and building management to improve efficiency
opportunity to establish year-on-year reductions. Instead, we are developing design baselines against which we can benchmark performance and target savings,’ explains Snoxall. As well as achieving reductions where
the new optimisation process has been rolled out, British Land’s strong approach to energy management is reflected in its overall 2011/12 performance (from 1 April 2011 to 31 March 2012), which included 27% less energy use across its like-for- like managed portfolio, compared to the
350 Euston Road
10 Exchange Square
-11% York House
The CIBSE Building Performance Awards recognise, reward and celebrate the best performance, innovation and practice in design, commissioning, construction, installation and operation of sustainable buildings and the manufacturers whose technologies enable energy efficiency. For further information on this year’s winners, as well as details of how to enter the 2013 awards, please visit
www.cibseawards.org
www.cibsejournal.com
September 2012 CIBSE Journal 41
kWh(million)
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