CO2 Secondary Refrigeration Unit

This secondary refrigeration unit is designed for medium and large cold storage. It utilizes R744 as a secondary refrigerant and is compatible with multiple primary refrigerants.

Secondary CO2 Unit - Image 1

Technical Specifications

Product Overview

High-Efficiency CO2 Secondary Refrigeration

This advanced secondary refrigeration unit utilizes R744 (CO2) to provide a safe, environmentally friendly, and efficient cooling solution for medium and large-scale cold storage facilities. By eliminating refrigeration oil from the evaporator and pipeline, the system significantly improves heat transfer efficiency and overall COP performance. Designed with modularity in mind, it provides stable operation even at low temperatures down to -30°C.


Configurable container shell for the refrigeration unit
Modular and adaptable container shell design for industrial cold storage environments.

Technical Specifications

Energy Regulation Stages

  • 100%
  • 75%
  • 50%

Primary Refrigerants
R22R507AR404AR134AR448AR449A
Secondary Refrigerant
R744 (CO2)
Evaporation Temperature Range
-45 to -5°C

COP performance comparison graph between direct evaporation and secondary systems
Efficiency comparison showing the stable COP performance of the secondary system at low temperatures.

System Features

Key Operational Advantages

  • Non-toxic and non-flammable operation
  • Reduced frost formation rate
  • Improved heat transfer efficiency
  • Lower total operating costs

Integrated System Components

Component Name
Gas-liquid separation device
Compressor
Oil separation device
Siphon device
Ventilation system
Control & Warehouse cabinets

Heat exchange efficiency infographic
The system design ensures a smaller heat exchange temperature difference for superior cooling performance.
Annotated diagram of the internal refrigeration system components
Comprehensive layout of integrated system components including separation and control devices.

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