PROJECT
INCORPORATING COLD CHAIN
Artificial ‘hams’ are placed in each cabinet to monitor product temperatures, which is
important to Woolworths and the consumer.
2010. The plant is still operational and in Each of the racks at the V&A can
2013, Mainstream Refrigeration installed a handle 75% of the refrigeration load
trans-critical plant at the new Waterstone of the 37 medium temperature (MT)
store in Somerset West. To reduce energy (2 to 4 o C),display cabinets, 5 low
usage further, a trans-critical parallel temperature (LT) (-25 o C) cabinets,
booster CO 2 plant was installed in 2016 three back up cold stores (2 to
at the Woolworths Cascades store in 4 o C), two freezer stores (-25 o C) and
Pietermaritzburg. a holding store (2 to 4 o C) at the
Mainstream Refrigeration have installed
receiving bay on the ground floor.
in excess of 42 trans-critical CO 2 sites for
Woolworths in Richards Bay, Bloemfontein,
Pietermaritzburg, Durban and Cape
Town. Commercial Refrigeration have
installed the many trans-critical plants
at all the new Woolworths stores in
the densely populated Gauteng and
Northern regions.
CO 2 as a
refrigerant with zero
ODP and a GWP
of 1, has reduced
the environmental
carbon footprint
of Woolworths’s
refrigeration plants
and with other
interventions,
has reduced
energy usage.
Each rack has six Frascold semi-
hermetic compressors, two on the
medium temperature circuit (-5 o C
suction), two on parallel compression/
MT and two much smaller compressors
on the low temperature. The installed
refrigeration power on each rack totals
98kWr on MT/Parallel and 15kWr on LT.
Built and tested at the Mainstream
Refrigeration factory in Ottery, the
overall dimensions of racks fit through a
standard height doorway.
REDUCTION IN ENERGY USAGE
CO 2 as a refrigerant with zero ODP
and a GWP of 1, has reduced the
environmental carbon footprint of
COLD LINK AFRICA •
March/April 2020
www.coldlinkafrica.co.za
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