An integrated CO2 (R744) refrigeration, heating and cooling system installed last year by Swiss cold storage operator Grünenfelder in Quartino used 30% less energy than the previous system that used R507A and R404A for cooling and heating.
That finding was reported by Luca Rossi, Engineer, Project Manager of Biaggini Frigoriferi, a Swiss manufacturer of CO2 commercial and industrial refrigeration systems that supplied the integrated system, called TotalGreEnergy. Rossi described the project last November at the ATMOsphere Europe Summit, held in Brussels; he was accompanied by Mirko Guidetti, co-owner of Grünenfelder, a family-run company specializing in the distribution of food and non-food products.
The integrated CO2 unit provides the store’s refrigeration, HVAC, and hot water production requirement in a single system throughout the year. Previously, the store had an R507A refrigeration compression rack and a reversible R404A heat pump for refrigeration, HVAC, and hot water.