PROJECT
INCORPORATING COLD CHAIN
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of 1 880m 2 , the many cabinets, island
freezers, cold rooms, and freezer rooms.
Material has been chosen for longevity
with least maintenance, such as stainless-
steel coils in the HC adiabatic gas cooler;
a glass fibre tank for hot water storage;
copper/aluminium coils in the cabinets
and cold room evaporators; galvanised
ducting with open top for overhead
CO 2 headers in the store; and stainless-
steel droppers to cabinets. PnP was very
specific and wanted no refrigeration
piping visible to the shoppers.
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CHALLENGES
One of the biggest challenges is the
fact that the plant room is located
quite far from the trading floor because
the top floor of the mall is a residential
development. This means that pipe runs
are quite long with high lift.
As mentioned, the plant is located on
the top floor of Centre Point while the PnP
store is on the ground floor. The refrigerant
risers were 8m in height and the furthest
pipe run is 140m from the plant room.
Also, all the piping from the gas cooler
had to be of stainless steel and required
coded welders.
Because of the residential units, the plant
noise level had to be kept to a minimum.
The location and direction of installation
was considered when placing the
equipment; 910mm EC fans were selected
for their low noise.
The proximity to the sea meant that all
equipment had to be corrosion resistant.
No municipal water was to be used
in the adiabatic condenser, so a water
harvesting from the cabinet, cold room
blowers, and HVAC had to be designed
and installed. East Midlands Water designed
and supplied a water filtration to cope with
the tough task of filtering the wastewater.
SUSTAINABILITY
CO 2 has low global warming
potential (GWP), which makes it a
1. A work of art done in copper piping
and covered in Insuflex insulation.
2. Pick n Pay Centre Point has
revolutionised the daily shopping for
foodstuffs and household consumables.
3. Ball shut-off valves have moulded
insulation covers.
4. The ring main piping as it leaves the
plant room, visible behind Perspex
covers for easy access to ball valves.
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COLD LINK AFRICA • March/April 2019
www.coldlinkafrica.co.za
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