The transcritical CO2 systems cut energy usage 10%-20% compared to standard booster racks.
Italian manufacturer EPTA has installed full transcritical efficiency (FTE) transcritical CO2 systems in new stores in Athens, Greece, and on La Palma, one of the Canary Islands.
The Athens store is part of Diamantis Masoutis, the largest supermarket and wholesaler in Northern Greece with 330 stores; the La Palma store is run by SPAR, one of the world’s largest supermarket chain with more than 13,100 stores in over 45 countries.
“The key motivation for the collaboration [between Diamantis Masoutis and EPTA] include the improved performance of FTE, which exceeds the traditional limits of transcritical technology,” according to an announcement published on Costan’s website. This is “ideal in any condition, also in the prevailing Mediterranean one like that of Greece.”
Both retailers are using other green technologies and SPAR promotes an “increasingly eco-friendly approach” with the opening of the new store in the town of El Paso, EPTA says in a press release. Apart from the CO2 refrigeration system, the El Paso store also includes LED lighting and an electric car charging station.
“The key motivation for the collaboration include the improved performance of FTE, which exceeds the traditional limits of transcritical technology," Costan
Both stores include Costan GranVista and GranBering cabinets for fresh and frozen products. The El Paso system, installed in February 2019, has a medium temperature capacity of 41 kW (11.7 TR) and a 9 kW (2.6 TR) low temperature capacity. The exact capacity for the Athens store hasn’t been published.
Compared to standard transcritical CO2 booster racks, it delivers an energy saving of 10% and 20% lower installation and maintenance costs. Compared to traditional R404a systems, the energy savings are even greater, standing at 25%.
Italian CO2 rack manufacturer SCM Frigo installed the first transcritical CO2 system for cold storage on the Canary Islands this year.