Agri-food, Spain
Project Overview
In partnership with one of Spain’s largest installers, Enex Technologies delivered a state-of-the-art Cascade CO₂/NH₃ refrigeration unit, specifically tailored for the agrifood sector. The system was designed to meet the demanding requirements of freezing chambers operating at -22°C, ensuring both high performance and sustainability.
The Challenge
The agrifood industry requires robust refrigeration solutions capable of maintaining ultra-low temperatures, often in challenging outdoor conditions. The client needed a system that could deliver reliable cooling, maximize energy efficiency, and align with modern sustainability standards.
The Solution
Enex Industrial provided a custom Cascade system that combines the strengths of natural refrigerants—CO₂ and ammonia (NH₃)—with advanced engineering for optimal results. Key features include:
CO₂ Module:
- Cooling capacity: 429 kW
- Evaporation temperature: -31°C
- Condensation temperature: -5°C
- Heat recovery: 50 kW (Water +40°/+50°C)
- Compressors: 3 x BITZER

NH₃ Module:
- Cooling capacity: 550 kW
- Evaporation temperature: -10°C
- Condensation temperature: +35°C
- Compressors: 2 x BITZER OSKA

This all-in-one solution is engineered to deliver high performance even in extreme outdoor temperatures, making it ideal for the agrifood sector’s most demanding applications.
Results & Impact
The Cascade CO₂/NH₃ unit has set a new benchmark for industrial refrigeration in Spain’s agrifood sector by:
- Ensuring Reliable, Ultra-Low Temperature Performance: Consistent operation at -22°C for freezing chambers
- Maximizing Energy Efficiency: Through integrated heat recovery and advanced compressor technology
- Promoting Sustainability: Use of natural refrigerants reduces environmental impact and supports compliance with evolving regulations
