CO2
CO2 in refrigeration
Already used in XIXth century, especially for fish preservation on trawlers, and later on substituted by fluorinated refrigerants, CO2 has good arguments, such as thermal and physical properties to become a “new old refrigerant”. Because of its intrinsic environmental properties, it certainly offers sustainable opportunities.Indeed, on one hand, thermal and physical properties are quite noticeable, and on the other hand, the CO2 molecule serves as basis to describe global warming potential (GWP): for instance the GWPs of R134a and R404A respectively are 1300 and 3260, compared to 1 for CO2. Use CO2 as refrigerant and get a sustainable installation.
CO2 can be used in refrigeration according two processes:
Either as brine (without compression)
Or as refrigerant (with compression)
