Agrovent Compression Station

Compressor Station in a Cold Storage Facility: Purpose and Key Parameters

The compressor station is the heart of a cold storage refrigeration system. Its primary role is to create and maintain the optimal conditions for long-term storage of vegetables by circulating and compressing the refrigerant.

Main Functions

• Cooling the produce: lowering the chamber temperature to the required level, which slows down respiration and aging of vegetables.
• Humidity control: working together with air coolers to prevent produce from drying out or, conversely, from excess moisture accumulation.
• System efficiency: ensuring the necessary cooling capacity and overall energy efficiency of the installation.

In addition, the station must operate reliably under variable loads — whether caused by changes in outside temperature, chamber occupancy, or ventilation cycles.

Technical Parameters

Cooling capacity typically ranges from 80 to 350 kW per 1,000 tons of produce. Operating pressures depend on the refrigerant and system mode: 2–10 bar during evaporation and 8–25 bar during condensation. Both traditional refrigerants (R134a, R404A, R507, ammonia/NH₃) and modern options such as CO₂ are used — the latter increasingly preferred for its eco-friendliness and high energy efficiency.

Power consumption depends on load and equipment efficiency and is usually within 15–150 kW per 1,000 tons of produce. To regulate capacity and provide redundancy, compressor stations are often equipped with multiple compressors, allowing flexible response to changing thermal loads.

Automation and Scalability

The control system is always automated, monitoring pressure, temperature, and individual unit operation while providing safety protection. Stations are typically built with a modular design, making it possible to add compressors and scale storage capacity as needed.

Conclusion

In essence, the compressor station provides the foundation for air cooler performance and the entire refrigeration system, delivering a cooling reserve (usually 10–15% above air cooler demand) to offset heat gains and ensure stable, long-term vegetable storage.