Projects
1
Founded in 2004, Chilleweni’s family-run company focuses
on providing storage and logistics services to a wide range
of clients within the frozen food market. Their impressive
new facility is situated in Gosforth Park in Germiston,
Johannesburg.
PROJECT SCOPE
The cold rooms supplied for the cold storage facility were:
• 3 x -22°C holding freezers
• 1 x 5°C chiller
• 1 x 10°C receiving and dispatch area
2
During the negotiations it was decided to remove the
designated room for the blast freezers and incorporate
five blast freezing sections inside the one holding freezer,
by boxing off a section at the bottom of the racking with a
plenum for a fan and canvas on the sides to direct the cold air
over the pallets.
REFRIGERATION PROJECT
3
4
MRE was appointed as the refrigeration contractor in March
2018 after the tender phase was completed and adjudicated.
The project was commissioned in September 2018.
The plant room equipment included:
• 1 x low-stage Mycom screw compressor;
• 1 x low-stage Mycom reciprocating compressor;
• 1 x swing Mycom screw compressor;
• 1 x high-stage Mycom screw compressor;
• -32°C accumulator vessel with 2 x hermetic ammonia
pumps;
• -5°C accumulator vessel with 2 x hermetic ammonia
pumps;
• Liquid receiver;
• Hansen air purger;
• 2 x Evapco evaporative condensers;
• Sondex plate heat exchangers;
• Evaporators by HC Heat Exchangers;
• PLC for monitoring and control by Carel;
• 2 x Southern Pumps glycol pumps; and
• 2x Southern Pumps compressor head cooling pumps.
PLANT DESIGN PHILOSOPHY
The refrigeration plant was designed with operating efficiency
and longevity as the primary design considerations.
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RACA Journal I June 2019
Freezer pods.
Mycom high-stage screw compressor in the ammonia
plantroom.
Mycom low stage screw compressor with Logix micro-
processing panel.
Receiving and dispatch valve station with hot gas reheat.
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