Pick n Pay and Matador always work together towards a common goal of finding optimal refrigeration systems that provide reliable, cost effective, and energy efficient installations for the Pick n Pay group.
The design for The Falls, their flagship store, was a challenge focussing on energy efficiency and utilising the latest state-of-the-art technology and engineering available.
The refrigeration installation at The Falls store is a R134/CO2 Sub-Critical Cascade-type System.
Matador has consistently shown that correctly designed systems using the latest technology with quality equipment and installation will out-perform cheaper installations, both in maintenance and energy usage.
The Installation
Medium Temperature System
The medium temperature system operates on R134a refrigerant with a suction temperature of -10°C and condensing at the design condition of 43°C.
The system has two multiplex racks fitted with six Bock-type HGX6/1410 eco compressors.
The refrigeration requirement for the R134a system is 648.77kW split over the two multiplex racks, one of the biggest systems installed by the Group.
Low Temperature System
The CO2 low temperature system operates at a design condition of -32°C suction temperature, condensing at -5°C. The condensing of the low temperature system is done via a plate heat exchanger on one of the medium temperature systems.
This is known as a cascade system. The low-temperature system has one rack with three Bock type HGX22P/125-4 compressors, operating in a sub-critical condition. The system capacity requirement is 70.9kW
Energy Efficiency
Minimum Average Maximum
kVA 80 150 235
Amps 120 240 360
The connected load for the entire refrigeration plant is 800A per phase.
As one can see from these figures, that were monitored during both average summer conditions and high ambient temperatures of up to 34°C, that the running conditions of the system are very favourable for energy savings.
