PROJECT
INCORPORATING COLD CHAIN
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Racks capable of
delivering 431kW each
to serve both medium
and low temperature
applications.
» » Each rack consists of eight
compressors all equipped
with service valves on the
suction, discharge and oil
side to allow for isolation
if required, as well as
pressure relief valves.
Four Bitzer compressors for the
medium temperature users at
a suction temperature of -5°C
and the lead compressor fitted
with a Danfoss Variable Speed
Drive (231 kW).
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Four Bitzer compressors for the
low temperature users at a
suction temperature of -25°C
and the lead compressor
fitted with a Danfoss Variable
Speed Drive (200 kW).
Two Bitzer parallel compression
compressors with the lead
compressor fitted with a Danfoss
Variable Speed Drive (VSD) and
is installed to directly compress
the flash gas present in the
liquid receiver. These parallel
compression compressors
increase the overall efficiency
of the system (31kW).
One Danfoss vapour multi
ejector which adapts the
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capacity requirements and
handles three different suction
groups in one device.
Danfoss CO 2 rack controller for
the entire system as well as a
dedicated rack controller for
the parallel compressors.
Oil management system with
electronic oil level regulators
installed on all the compressors.
Danfoss high pressure valve which
regulates the pressure in the gas
cooler to maintain the optimum
coefficient of performance (COP)
for the system during trans-critical
operation as well as a degree
of sub-cooling during subcritical
operation.
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Inside one of the refrigeration plant rooms.
The ‘before’ photo – starting from scratch to build the new site and plantrooms.
High-speed door inside the freezer.
COLD LINK AFRICA •
SEPTEMBER 2019
Starting work on the outside refrigeration plant room.
www.coldlinkafrica.co.za
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