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Success Stories: Refrigeration

Leakages in traditional refrigerant systems in stores and retail support centres (RSCs) account for a proportion of Sobeys aggregate carbon footprint. The transcritical CO2 refrigerant system, is a low Global Warming Potential (GWP) alternative to the traditional systems.

Traditional hydrofluorocarbon (HFC) refrigerants have an approximate GWP of 4,000 kg of CO2 equivalent emissions for every 1 kg of refrigerant leaked, whereas the new refrigeration system has 1 kg of CO2 emissions for every 1 kg of refrigerant leaked.

The installation of new CO2 refrigerant systems with heat reclamation not only makes environmental sense, but is less expensive in the long run to operate and maintain. In 2018/19 we converted 100 stores’ refrigeration systems from HFC to CO2.