By recovering waste heat from its CO2 refrigeration system, the supermarket has reduced its heating bills and cut its carbon emissions by 6.7 metric tons of CO2e a year.
The ultra-low superheat module can raise the evaporation temperature by 4–5°Kelvin and help provide energy savings of up to 30%.
GEA has been studying integrating high-temperature CO2 heat pumps with conventional heaters to preheat the process air of spray-drying systems since 2019.
Air-to-water models, which are particularly popular in Denmark, account for 75% of Fenagy’s heat pump projects in the last 12 months.
The move is part of a DKR 2.5 billion (US$366 million) investment in energy efficiency and climate-friendly technologies, which also includes solar panels and heat pumps.
The ‘smart’ CO2 supermarket will be fully functioning and run by Brugsen, Denmark’s largest cooperative retailer.
The Annex 58 high-temperature heat pump project has reviewed systems supplying temperatures over 100°C and found refrigerants like CO2, water, hydrocarbons, helium and ammonia being used.
The heat pump from Danish OEM Advansor will replace 250 oil and gas boilers, and cut an estimated 1,200 metric tons of CO2e emissions per year.
Generating hot water up to 70°C, the heat pump is designed to replace fossil fuel furnaces.
The installation has been nominated for the Chiller of the Year 2022 award by British outlet ACR News.