Subcritical CO2 applications
From energy and pressure level points of view, very beneficial applications can be seen for industrial and larger commercial refrigeration plants. For this, CO2 can be used as a secondary fluid in a cascade system and if required, in combination with a further booster stage for lower evaporating temperatures (Cascade system with CO2 for industrial applications).
The operating conditions are always subcritical which guarantees good efficiency levels. In the most favourable application range (approx. -10 to -50°C), pressures are still on a level where already available components, e.g. for R410A, can be matched with acceptable effort.
