Architect and Builder February/March 2019 | Page 53

Energy efficiency was one of the main
objectives of the client’s brief. Energy standards
(SANS 10400 Part XA) were achieved by following
a rational approach. Energy modelling was done
for the building that modelled the expected energy
use for a full year.
The HVAC system consists of a central
chilled water system with air-cooled Intramech
chillers. The anchor tenant was provided with
a dedicated HVAC system. The basements are
ventilated with eight 1,250mm diameter fans
that are controlled from CO2 sensors. To save
energy, the number of fans running at any time
are controlled based on the reading from the
CO2 sensors. These fans are also used for the
smoke extraction system.
Centre Point
Water sustainability was addressed by steering
away from water based heat rejection and
designing an air cooled system instead.
A conventional primary/secondary chilled
water pump system was not considered
viable due to the sustainability objectives. As a
result a variable volume primary chilled water
system was designed which meant that the
secondary pumps were not required, thus
saving energy.
Conclusion
The development of Centre Point marks a key
moment in the renewal of Milnerton’s CBD
and hopefully will act as a catalyst for future
development in the area.
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