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harnessing the power of the1091 .pdf


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harnessing the power of the
The V&A Waterfront's Silo District is recognised as one of the most advanced and
environmentally-friendly developments in Africa, as the completed No 1 and No 2 Silo
developments use the waters of the Atlantic Ocean in the surrounding harbour to provide cooling
and heating to the R2.5-billion project, which is due for completion in 2017 once an additional four
silo developments are fully-operational.
Cape Town, South Africa, October 22, 2015 - Heating and air-conditioning solutions provider
Carrier is playing a central role in the final stage of this project, with the installation of a 6 MW
cooling plant that will provide the same cooling and heating solutions to Silos No 3 to 6.
Carrier business development manager Jaco Smal notes that AquaEdge 23XRV variable speed
screw chillers is a highly-efficient cooling solution that achieves a coefficient of performance
(COP) between 10.37 and 16.04 under various conditions. COP is a measurement of efficiency
obtained by dividing the power output by the power input. The higher the number, the more
efficient the system.
"By circulating seawater through heat exchangers, the system does not require cooling towers to
reject heat into the atmosphere, rather, it rejects unwanted heat into the ocean. As a result, the
system gains from the efficiencies associated with water cooling, and avoids the pitfall of water
usage through evaporation in cooling towers," he says.
The Carrier AquaEdge 23XRV chiller also makes use of non-ozone-depleting HFC-134a
refrigerant and next-generation, patented screw compressor technology that features a tri-rotor.
"This unique chiller is able to use the variable frequency drive (VFD) to reduce speed and
optimise operation, independent of ambient conditions. As a result, it is able to precisely match
building load and conserve energy, making it the world's most efficient chiller in these conditions,"
explains Smal.
In addition to breaking this efficiency barrier, the AquaEdge 23XRV features robust and flexible
operation with a wide operating envelope and surge-free compression. The innovative design and
high-quality construction makes AquaEdge 23XRV chillers the most modern and efficient choice
in water-cooled plants. It is available is sizes from 250 tonnes to 550 tonnes (879 kW to 1 934
kW) Nominal.
The Carrier cooling plant will provide cooling and heating solutions for four new developments in
the V&A Waterfront's Silo District. The Silo District will introduce over 35 000 m2 of mixed use,
sustainable developments including new corporate offices, a residential development, a health
club, an internationally-branded hotel, plus over 1050 additional parking bays.
No1 and No 2 Silo were completed in mid-2014. Silo 1 ranks as the only South African building to
receive a 6-Star ‘As Built' GBCSA rating, which signifies world-leadership in sustainable
development. The Silo District is also home to the Zeitz Museum of Contemporary Art Africa
(Zeitz MOCAA), currently under development.
The district will sit on top of a 2 750 parking bay super basement. When completed,
approximately 2 500 people will work in the Silo District daily. In a 2014 independent economic
impact study commissioned by the V&A Waterfront, the expected nominal contribution to GDP
from future developments is R29.9-billion by 2027.
Carrier is a unit of United Technologies Corp. (NYSE: UTX).
To find out more, go to: www.ahi-carriersa.co.za


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