Download GOLDER BUILDING 1 EXCEEDS SUSTAINABILITY TARGET

ENGINEERING EARTH’S DEVELOPMENT, PRESERVING EARTH’S INTEGRITY
GOLDER BUILDING 1 EXCEEDS
SUSTAINABILITY TARGET
ORIGINALLY PUBLISHED IN:
PLUMBING AFRICA, AUGUST 2015
ARTICLE RE-PRINT
AUTHOR(S): ILANA KOEGELENBERG
Golder House Building 1 exceeded its target to achieve a 5-Star Green Star SA Existing Building performance
PILOT rating, achieving a 73% reduction in water consumption (compared to a similar building) and realising a
significant energy saving.
Building 1, Golder House is one of seven
buildings situated in the Maxwell Office Park, as
part of the greater Waterfall Development
precinct. The development has easy access to
Johannesburg and Pretoria via Allandale road
and the N1 highway, and is situated near the
Waterfall Netcare hospital and the future Mall of
Africa retail centre.
The building comprises of 5 412m2 grade A office
space, spread over three office floors with two
basement parking levels accessed by means of a
vehicle ramp on the south-western corner of the
building. The entrance foyer on the south side
incorporates a triple volume atrium which allows
ample daylight into the space. The office area on
each floor is split into two wings with the
ablutions and circulation area in the middle.
Light-wells have been introduced on either side
of the central ablutions to allow sorne daylight
into the adjacent office areas. Two roof lights with
clerestory windows further allows daylight to
penetrate into the top floor. The base building
design also allows extensive opportunity for
external views.
The benchmark consumption for the building is
set at 245,69kWh/ m2/annum. According to the
energy performance benchmarking of this
building, the annual energy consumption is
approximately 182,51 kWh/m2/annum. This is
based on the Green Building Council of South
Africa's Energy Benchmarking Tool. Based on
the current City of Johannesburg of R1 ,00/kWh
an estimated total saving of R171 929,60 per
annum can be realised.
ENERGY AND ENVIRONMENTAL
STRATEGIES
Building 1, Golder House has various
strategies and initiatives in place that
accommodate the reduction of energy demand
and consequently greenhouse gas emissions.
THIS ARTICLE HAS BEEN REPRINTED WITH PERMISSION FROM “NAME OF PUBLICATION HERE”. THE LAYOUT HAS BEEN CHANGED FOR THE PURPOSE OF THIS REPRINT.
Building 1, Golder House's energy efficiency
strategy incorporates:
• Appropriate zoning of mechanical system;
• Variable Speed Drives for mechanical
equipment to reduce operational energy
consumption;
• Carbon Monoxide (CO) sensors in the
basement to reduce energy consumption of
extraction fans;
• Efficient lighting and occupancy sensors;
• HVAC management system; and
• High performance glazing system and
external shading devices.
RAINWATER HARVESTING
Rainwater is drained from the roof via the Geberit
Pluvia system and collected in the Kyasol
underground rainwater harvesting tank located in
the garden to the west of the building.
GEBERIT PLUVIA SYSTEM
The special construction of the Geberit Pluvia
roof outlet ensures a closed water column forms
in the pipes which generates negative pressure
in the piping system and causes the water to be
suctioned off as a result. The discharge velocity
and capacity increases considerably
in comparison with conventional outlets, despite
the smaller pipe dimensions. The high flow
velocity of the water improves the self-cleaning
forces and minimises the danger of blockages in
the pipes.
RAINWATER HARVESTING SYSTEM
To slow down the water velocity from the Pluvia
system, a Pluvia speed breaker sump is installed.
From there, the water gravity flows to an Optimax
pre-filter unit before entering the two 6 500
underground tanks. A floating suction strainer is
used to take of the water 10cm from the surface
to allow the cleanest possible quality of water to
be used. A submersible priming pump delivers
the water on demand to the internal booster
pump (in Basement- 1) that boost the rainwater
to the water closets 0/VCs) and urinals of the
building. The booster system is equipped with an
expansion vessel to reduce the pumps running
time.
The system is also equipped with automatic
switchover to municipal water. If the tanks are
empty or in the event of a power failure the
switchover device would automatically switch to
municipal supply.
METERING AND SUB METERING
Metering and sub-metering of energy and
resource use is a critical component of
comprehensive operations and maintenance.
Metering provides the information that allows the
building operations staff to make informed
decisions on how to best operate mechanical,
electrical and water systems and equipment.
Building 1, Golder House is equipped with
Echelon electronic smart meters for energy
metering. Besides the main bulk meter, separate
sub-metering is done for loads larger than
1OOkVA. The smart meters are remotely
monitored by UAS utility management services
contracted by Atterbury for Maxwell Office Park.
There is a City of Tshwane electricity and water
council meter installed at the building and UAS
supplies the meter readings for electricity to
Eskom and water to the City of Johannesburg
municipality.
The predicted municipal water consumption of
the building is approximately 0,17kVm2/annum.
The water metres accurately inform the
performance of the building durin goperations,
therefore allowing for any deviations to be
detected timeously and addressed quickly
thereafter.
WATER REDUCTION
The following water reduction initiatives are
currently in place at Building 1, Golder House:
• To reduce the annual water consumption of
the building for the flushing of WCs, dual
flush cisterns are installed throughout the
building which reduces the average flush
volume. This means only a small quantity of
water will be used when light flushing is
needed.
• All taps are fitted with flow restrictors which
reduce the flow rate of the water leaving the
tap,this ensures that no water is wasted
through unnecessary use.
• Building users and visitors are encouraged
to use water sparingly through initiatives
such as closing all taps and not letting them
run unnecessarily; using dual flush toilet
systems in the intended manner and
reporting any leaks to the facilities manager
immediately.
and second floor. Under-counter energy-efficient
geysers were installed for hot water in kitchens
and advanced hydro- Zip systems supply boiling
water for tea/coffee and filtered chilled drinking
water.
There is an additional insulated hot water
circulation system located in Basement -1 that
provides hot water to the showers and taps in the
cyclists change rooms.
Circulation pumps circulate hot water around the
building with electrical motors calculated to
perform at the minimum energy levels required to
equal the heat losses of the inslulated
reticulation.
The hot water circulation pumps will be controlled
via a timer to reduce energy losses in times when
the building is unoccupied. The entire hot water
circulation system is insulated against any
unnecessary heat losses and to ensure that only
small hot water circulation pumps
are needed.
OTHER SUSTAINABLE FEATURES
Even the Paint, carpets, blinds, furniture,
cleaning detergents of Golder Building One was
specially selected. Care has been taken to
ensure that 'green' principles apply to the above
during construction, fit-out and operation of the
building. A waste sorting and recycling facility
has also been established in the basement.
Owner
Developer
Architect/Designer
Sustakinability
Consultant
Consultilng
Engineer
Contractors
Product Suppliers
DOMESTIC HOT WATER
The main water supply will be from the municipal
water connection which is reticulated through the
site up to the building boundary. An HDPE tank
of 5 500 m3 is located in Basement 1 and
domestic water is redistributed from here to the
rest of the building by a variable speed booster
pump.
Hot water for the building is generated by a
geyser located on the first floor; this supplies hot
water to the bathroom taps on the ground, first
.
Golder Associates
Atterbury
Skyscape Architects
Aurecon
Electrical : Quad Africa
Mechanical : WSP
Wet Services : WSP
Civil : DG Consulting
Main Building : Group 5
Mechanical : Temp-U-Air
Wet Services : JLM Plumbing
Civil : DG Consulting
Smart meters : Echelon
Rainwater harvesting tank : Kyasol
Storage tank: JoJo/Kyasol
Pluvia system : Geberit
Pre-filter unit : Optimax
Hot water system : Stiebel-Eltron
Sanitaryware : Vaal
Pumps : Grundfos
Cisterns : Grohe
Hydrotaps : Zip
Hot water geyser : Kwikot
The modern design of Building 1
Building users and visitors are encouraged to use water sparingly through many initiatives
The hydro tap in the kitchen area
ABOUT GOLDER
As a global, employee-owned organisation with
over 50 years of experience, Golder Associates is
driven by our purpose to engineer earth’s
development while preserving earth’s integrity.
We deliver solutions that help our clients achieve
their sustainable development goals by providing
a wide range of independent consulting, design
and construction services in our specialist areas of
earth, environment and energy.
For more information, visit golder.com.
THIS ARTICLE HAS BEEN REPRINTED WITH PERMISSION FROM PLUMBING AFRICA. THE LAYOUT HAS BEEN CHANGED FOR THE PURPOSE OF THIS REPRINT.