CO2 heat pump with R744: how it differs from a conventional refrigeration circuit

R744 is carbon dioxide and is used in special heat pumps, particularly for domestic hot water production.

High operating pressure

CO2 systems operate at much higher pressures than many conventional refrigerants.

Transcritical cycle

Under many conditions, there is no classic condensation as with standard refrigerants, but rather operation in a distinct transcritical cycle.

Advantage

R744 can be particularly suitable when high DHW temperature is required.