FEATURE
INCORPORATING COLD CHAIN consumption and optimising cooling efficiency . Moreover , advancements in compressor technology , such as variable speed drives , contribute to further energy savings and operational efficiency .
Transitioning to advanced refrigeration systems like CO 2 poses technical challenges , particularly in terms of maintenance and skill requirements . While multiplex systems offer greater efficiency , they also demand a deeper understanding of controls and operation . Overcoming these challenges requires ongoing training and education for maintenance personnel to ensure the seamless integration and optimal performance of new equipment , explains Howitt .
There has traditionally been a psychological barrier associated with installing doors on refrigeration units . “ While there is a convenience in open display cases , the energy-saving benefits of enclosed units is trumping convenience . By preventing temperature fluctuations and minimising energy loss , refrigeration units with doors offer substantial efficiency gains , with potential energy savings ranging from 40 % to 50 %. Additionally , the longer shelf life of perishable goods stored in enclosed units contributes to reduced wastage , a significant consideration for retailers ,” says Howitt .
SHIFT IN REFRIGERANTS
He notes that notwithstanding the global push towards natural refrigerants like CO 2
, the adoption rate varies across different regions and supermarket chains . While major supermarket groups have long embraced
CO 2 technology , others remain cautious due to concerns about technical complexity , rural skills shortages and gas availability . Additionally , regulatory hurdles and safety considerations surrounding flammable refrigerants like R290 pose challenges to widespread adoption , despite their environmental benefits .
Challenges arise in navigating safety concerns and regulatory frameworks as the industry moves away from hydrofluorocarbons ( HFCs ) and towards natural refrigerants . The transition to low- GWP ( Global Warming Potential ) alternatives presents both opportunities and complexities , particularly in ensuring compliance with evolving regulations and addressing safety considerations . While Europe leads the way in adopting sustainable refrigeration practices , other regions , including Africa and America , are more gradually embracing these innovations . However , significant disparities persist , with many supermarkets still reliant on traditional refrigerants .
“ With regulations prohibiting the release of refrigerants into the atmosphere , the industry is shifting towards more sustainable practices , including the recovery and reuse of gases . While some companies offer services to evacuate and recover refrigerants , the focus is increasingly on adopting natural refrigerants like CO 2
, which eliminate the need for evacuation and pose fewer environmental risks .”
In South Africa , regulatory frameworks regarding refrigeration standards and
Cold Link Africa
Woolworths has been leading the South African supermarket sector for some years on the path of
CO 2 refrigerant systems .
14 www . coldlinkafrica . co . za COLD LINK AFRICA • March / April 2024