Cold Link Africa January / February 2020 | Page 14

PROJECT
INCORPORATING COLD CHAIN
comparing many small bakkies to one
large truck. The energy savings are
intuitive even to a layman.
OFFICIALLY KICKING THINGS OFF
A celebratory ribbon cutting event was
held where all major stakeholders from
clients to contractors and suppliers were
all invited for a tour of the entire plant
shortly after it was commissioned. Pie
City staff thanked all contractors for
their extra effort – working Saturdays
and even Sundays to ensure that the
12
kW/hrs used. This is achieved entirely by
allowing the plant to unload in order to
match cooling requirements and hence
keep condensing pressures as low as 35°C
and below. Additionally, the use of a
multiplex design eases pressure from the
electricity grid by preventing on/off spikes
all day.
The majority of freon cooling systems
on spirals employ a number of simplex
units (up to four on larger units), while
this plant has one large multiplex. To
make an analogy, this would be like
Once packed into the trucks, the pies are delivered to 50 stores in Gauteng. More stores were
franchised and by the end of 2019, this number went up to 150.
Evapco evaporative condenser.
The Blast freezer runs as low as -35°C but
in operation was found that the best setting
was closer to -30°C to trim energy usage, allowing
an entire compressor to switch off.
From left: Marc King, head of operations; and engineer, Kevin Walter.
16
Some of the HVAC ducting for the facility.
14
www.coldlinkafrica.co.za
Multiplex cooling system providing 230kW cooling.
COLD LINK AFRICA •
January/February 2020