The Performance Analysis of an Integrated CO₂ Refrigeration System with Multi-Ejectors Installed in a Supermarket

The field data from an integrated CO₂ refrigeration system installed in a supermarket located north of the capital of Lisbon was analyzed. The goal was to demonstrate the effect and performance of multi-ejectors on a refrigeration system operating in a warm climate. The measurement results for the system with and without activating ejectors were compared. It was observed that the system with a multi-ejector operation had considerable performance superiority. The ejectors improved the cooling capacity of the medium temperature stage of the system by 17.4%. The system with active ejectors had 7.5% less total power consumption compared to the ejector off mode of the same system.
Keywords: R-744; integrated CO₂; supermarket; transcritical; ejectors; power consumption; refrigeration