Buildings Performance
Lessons learnt The whole focus will shift towards electricity demand
Collaboration
All this gives Banks and his team confidence that their as the Government’s targets for zero carbon housing Project
year two target of achieving a reduction of more than by 2016 and commercial buildings by 2019 loom on team
100 per cent in CO2 emissions compared with the the horizon.
Architects:
previous building’s performance in 2007-08 will be “Decarbonising the Grid and tackling embodied
Frederick Gibberd
achieved. Defra is also predicting its Display Energy carbon will be far more important as a much larger Partnership
Certificate (DEC), which was being put together at the proportion of our consumption will be electricity for
Frank Shaw Associates
time of writing, will give the building an A rating for heat pumps and the like,” says Banks. “The carbon Cost consultant:
actual energy consumption. This will be the building’s factors for grid electricity in the Part L calculations
Davis Langdon
first DEC since it was fully occupied in May 2008. will have to come down dramatically in the next 20 M&E contractor:
“We are expecting a 25-year payback on the years.”
Haden Young
renewables, which might seem like a long time, but The new Lion House proves that building services
M&E consultant:
overall it is a cost-effective way of saving carbon,” says engineers have the expertise to design low-consumption
AECOM
Banks. “There is an upfront price to pay for this kind buildings. In the future the longer term challenge will
Main contractor:
of sustainable design and the cost per square metre is be delivering what power remains from low carbon
Kier Northern
higher for this building than for comparable offices in sources. l
Project manager:
the region, but you have to look at whole lifecycle costs
Appleyards
and we are already getting the operational savings we For more information on Display Energy Certificates see
Structural engineer:
expected.”
the new CIBSE TM47: Operational Ratings and DECs,
AECOM
which describes the background to the regulations,
He adds that there are important lessons to be learned
ratings and certificates, including the most recent
from the fact that Lion House proves it is possible to revisions of the CLG calculation procedure and software.
produce buildings with negligible space heating loads
It also contains extensive FAQs on DECs and ORs. TM47
is available from the CIBSE bookshop at
www.cibse.org
that also receive their hot water from solar thermal.
The outcomes … Year 1 meter readings
Actual Gas Projected Gas
Actual Biomass Projected Biomass
10000
8000
h
)
6000
K
W
4000
2000
r
g
y
u
s
e
(
0
-2000
1.4.09 1.5.09 1.6.09 1.7.09 1.8.09 1.9.09
-4000
1.10.09
1.1109
1.12.09
1.1.10 1.2.10 1.3.10
o
n
t
h
l
y
e
n
e
M
-6000
-8000
-10000
The outcomes … Year 1 meter readings
Summary of energy usage
and CO2 output in year one,
Actual Gas Projected Gas Actual Electricity Projected Electricity
Actual Biomass Projected Biomass Actual Generated Projected Generated
based on actual readings
10000
8000
Annual heat demand reduced by 98 per cent
h
)
6000
compared with old Lion House readings for 2007-08
K
W
4000 Grid Electricity use reduced by 38 per cent compared
2000
with old Lion House readings for 2007-08
0
Operational CO2 Emissions reduced by 81 per cent
-2000
compared with old Lion House readings for 2007-08
1.4.09 1.5.09 1.6.09 1.7.09 1.8.09 1.9.09
-4000
1.10.09
1.1109
1.12.09
1.1.10 1.2.10 1.3.10
o
n
t
h
l
y
e
n
e
r
g
y
u
s
e
(
Aiming for 100+ per cent reduction, true net zero
M
-6000
carbon in year two compared with old Lion House
-8000
readings for 2007-08
-10000
Source: AECOM
www.cibsejournal.com July 2009 CIBSE Journal 35
CIBSEjul09 pp32-35 Buildings.indd 35 26/6/09 12:14:21
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