PROJECT
INCORPORATING COLD CHAIN
Continued from page 21
The refrigeration plant has a low-stage operating capacity of
480kWR and high-stage operating capacity of 1 486kWR.
REFRIGERATION PLANT DETAILS
The upgraded refrigeration plant has a
low-stage operating capacity of 480kWR
and high-stage operating capacity of
1 486kWR.
There are two low-stage duty
compressors, two high-stage duty
compressors, and a swing compressor.
The accumulator vessels have been
designed to allow for future expansion of
the refrigeration plant.
Two ammonia to glycol plate heat
exchangers are used to cool down the
glycol, which is then pumped to the various
glycol-cooled rooms mentioned above.
Two new Evapco induced draft
condensers were installed, with close-
coupled, mono-block-type circulating
pumps that circulate water over the
galvanised coil. A closed-loop cooling
circuit for the compressor oil is also installed
in each unit.
LIST OF PROFESSIONALS
Owner Massmart / Wallmart
Architect / Designer R&L
Quantity surveyor MLC
Consulting engineers
Contractors
Electrical WSP
Mechanical WSP
Refrigeration Marine Refrigeration Engineering (MRE)
Main building Edilcon Construction
Panelling Rudnev
Steel supply Ferro
Electrical Qualect
Heat rejection rate: 923kW (each)
Condensing temperature: 34°C
Wet bulb temperature: 20°C
TIGHT DEADLINES
Sufficient and regular communication
between subcontractors on site is always
a crucial aspect to ensure efficient
production from all parties, explains Charles
van der Walt of MRE Gauteng. “Finding
the solution to the primary steelwork
misalignment above the cold rooms was a
good example of this.
“Keeping in mind that everyone needs
to work as a team to finish a project on
time, moving away from the immediate
blame-shifting, and moving towards a
positive mindset to create innovative
solutions to unexpected problems, is
vital for the successful completion of any
project,” says Van der Walt. CLA
Ammonia and glycol chiller valve stations.
Outside MassFresh Meat’s new ammonia plant room.
The -10°C and -34°C accumulator skids complete with plate
heat exchangers, ammonia pumps, and gauge panel.
The three KSB glycol pumps.
COLD LINK AFRICA • January | February 2018
www.coldlinkafrica.co.za
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