CO2 as a refrigerant in cascade supermarket systems, transcritical applications, transport refrigeration, and heat pumps were among major developments in recent years. Here is a summary of those developments.
The contractor QPlan installed NH3/CO2 systems for Tesco and Auchan supermarkets over the last three years in Hungary. According to reports, the four systems use ammonia at higher temperatures and CO2 at middle and lower temperatures.