-
+
Ground source heat pump
· A ground source heat pump (GSHP) delivers
low-grade heat to the building at a coefficient of
performance (COP) of 4.2 and free cooling energy
efficient ratio (EER) of 20 via 150 m deep closed-loop
boreholes.
· The GSHP also preheats the cold water feed to the
hot water system to reduce gas consumption.
· Inter-seasonal heat storage increases the efficiency
of the GSHP.
· In winter, the GSHP is used to heat the building via
radiators and tempered air.
· In summer, the GSHP free cooling is delivered via the
air handling unit in the form of cooled supply air.
· The building is not currently dependent on the
cooling system for compliance with government
overheating criteria for schools. However, it offers
a more comfortable teaching environment and
provides resilience against future climate change.
Energy efficient lighting
· Efficient LED lighting is controlled by occupancy
sensors default to off when unoccupied and daylight
is dimming to reduce energy consumption.
Photovoltaic panels
· High-efficiency photovoltaic panels on A-frames will
provide the equivalent energy to ensure that, on an
annual basis, the development will be zero energy
and zero carbon.
· The panels are spaced to avoid self-shading, provide
maintenance access and allow light through to the
green roof below.
A.
B.
C.
Systems overview
Solar shading
Enhanced air handling unit (AHU) heat recovery
Exhaust air
Fresh supply air
Greasy air extracted from kitchen
Ground source
heat pump
Winter
i10 |
Hackbridge
44