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PROJECT
1
1 and 2: The lightweight
steel frame structure
perfectly suited an in-wall
system. In-wall concealed
traps for the wash hand
basins were used to obtain
a clean architectural finish
compared to the traditional
rubber P trap or bottle trap.
The sanitaryware from Duravit was carefully selected
to complement the low-flow cisterns and taps and, at
the same time, to maintain a high aesthetic value as
envisaged by AECOM architects.
The taps to the wash-hand basins and showers are
fitted with Grohe thermostatic mixing valves to provide
premixed water in order to prevent the wastage of hot
water. The temperatures were set to 38 degrees Celsius
in male ablution showers and 40 degrees Celsius in
female ablution showers.
Helix 4000/5000 water meters were installed as primary
meters for the building supply, with smaller meter sizes
for submeters. The meters are connected to the BMS for
monitoring and early leak-detection warning. This was
also targeted at the required Green Star rating.
GREEN STAR RATING
The N4 Kroondal fuel station aims to achieve a 4-Star
Green Star rating from the Green Building Council of
South Africa, making it the first service station in South
Africa to achieve such a prestigious accreditation.
The ‘as built’ Green Star rating that the project is
targeting, encompasses locally sourced materials,
community facilities, indigenous planting, the recycling of
construction waste, a structure that can be disassembled
and reused to ensure reduced embodied energy and
resource depletion through the concrete mix, and low
VOC interior finishes, among others.
2
SEWER TREATMENT PLANT
Full details of the on-site sewer treatment plant are
available on request from AECOM. The plant is complete,
including unit treatment processes, chemical dosing
equipment, sludge treatment and handling, associated
pumps, pipework, valves, and electrical and other
ancillary equipment for the treatment of wastewater to
specified standards.
SYSTEM’S IMPACT ON EFFICIENCY
Water- and energy-efficient designs and outcomes are
in line with Green Star targeted credits. The estimated
water savings are between 30 and 35% due to the
recycling of sewer water for reuse and the minor
contribution from rainwater harvesting for gardening or
other uses.
The back-up water storage eliminates the risk of water
interruptions and in turn, prevents business interruptions.
The selected energy-efficient pumps could, in general,
save up to 30% on energy consumption. PA
Unique elements of the project
•
•
•
•
First fuel service station to be built with a
lightweight steel structure
Potentially the first Green Star-rated fuel service
station
Complete water-efficient design that is
integrated with the BMS for monitoring
Reuses black water in the building, reducing
pressure on municipal supply.
All grey and black water on site is filtered and reused in
the toilets and urinals. The building is fully controlled and
monitored via a BMS, while live energy- and water-use
data is displayed in the shop area.
May 2019 Volume 25 I Number 3
www.plumbingafrica.co.za