PROJECT
INCORPORATING COLD CHAIN
Continued from
page 1
New cold rooms for
MassFresh Meat
PROJECT SCOPE
The cold rooms supplied for the meat
production facility were as follows:
• Ammonia plant rooms;
• Receiving area;
• Carcass chiller;
• Offal chiller;
• Despatch area;
• Finished goods chiller;
• Despatch freezer;
• Raw material freezer;
• Finished goods freezer; and
• Blast freezer 2.
Processed polony;
Processed polony cold room;
High-risk area; and
Polony packing.
REFRIGERATION PROJECT
Marine Refrigeration Engineering (MRE) was
appointed as the refrigeration contractor
in November 2016 after the tender phase
had been completed and adjudicated. The
project was commissioned in June 2017.
The plant room equipment included:
• 2 × low-stage Mycom reciprocating
compressors;
• 1 × swing Mycom reciprocating
compressor;
• 2 × high-stage Mycom reciprocating
compressors;
• -35°C accumulator vessel with 2 ×
ammonia pumps;
• -10°C accumulator vessel with 2 ×
ammonia pumps;
• Liquid receiver;
• Hansen air purger;
• Evapco Evaporative Condensers;
• Sondex PHEs;
• Evaporators by HC Heat
Exchangers;
• PLC for monitoring and control by
Carel; and
• 3 × KSB glycol pumps.
PLANT DESIGN PHILOSOPHY
The refrigeration plant was designed with
operating efficiency and longevity as the
primary design considerations.
This has resulted in the following
operating principles being incorporated
into the design:
• Ammonia as a refrigerant.
• Two-stage refrigeration with
pumped recirculation for the highest
practical efficiency. A coefficient of
performances (COPs) of 4.4 can be
achieved on the compressors.
• Reciprocating compressors with
water-cooled oil cooling.
• Variable frequency drive (VFD)
for the reciprocating compressors
to ensure close matching of the
operating compressor capacity to
the system heat load.
• VFD for the condenser fans.
• Freezer evaporators mounted in
pods for quick, effective defrosting.
• Glycol cooling supplied in all
production rooms.
Continued on page 23
Glycol rooms included:
• Deboning room;
• De-boxing chiller;
• Chicken breaking chiller;
• Chicken packing chiller;
• Ground and retail cutting chiller;
•
•
•
•
The five Mycom reciprocating compressors in the plant room.
Mycom reciprocating compressor with the -10°C and -34°C accumulator drums.
COLD LINK AFRICA • January | February 2018
www.coldlinkafrica.co.za
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