What is an R744 CO₂ Transcritical System?

R744 CO₂ Transcritical System is an advanced industrial and commercial refrigeration system that uses carbon dioxide (CO₂) as the refrigerant.

“R744” is the official refrigerant code for CO₂ refrigerant.

This system is widely used in:

• Supermarkets
• Hypermarkets
• Cold rooms
• Blast freezers
• Food processing factories
• Cold chain logistics
• Industrial refrigeration plants

It is considered one of the most environmentally friendly refrigeration technologies available today.

How the CO₂ Transcritical System Works

Unlike traditional refrigerants, the CO₂ transcritical system operates at:

• Very high pressure
• High efficiency cooling cycles
• Ultra-low temperature applications

The system moves through:

1. Compression
2. Gas cooling
3. Expansion
4. Evaporation

When ambient temperatures become high, the system operates in a “transcritical” mode where CO₂ behaves differently from conventional refrigerants.