CO2: Refrigeration systems using Carbon Dioxide R744

Refrigeration systems using Carbon Dioxide R744 as a refrigerant are the most promising solution for carbon footprint reduction in a number of industrial, commercial and retail applications.
The use of Carbon Dioxide as a refrigerant is not new, as it dates back to the 1850’s and it reached its peak between 1920 and 1930. With the discovery of "more convenient" Chlorofluorocarbon (CFC) and Hydro chlorofluorocarbon (HCFC) refrigerants, its use declined.
However, Carbon Dioxide has reemerged since 1993, due to international recognition of the scientific evidence that synthetic refrigerants have a heavy environmental impact.
Modern CO2 refrigeration, therefore, is a relatively new technology and CO2 is a "special" refrigerant. The efficient and safe use of this technology requires a new approach, as it entails uncommon issues.

Among the most important advantages of CO2 as a refrigerant are:

  • Its low cost
  • Its wide availability in all the world
  • It is not harmful for the environment, given that it is a natural substance
  • It is non-toxic
  • It is non-flammable
  • It is not, and it will never be, restricted by law