Fluid Chillers for Sub-Zero Temperatures

Main advantages and features

• Extreme temperatures: our cascade systems are designed to reach significantly sub-zero fluid outlet temperatures. This is demonstrated by recent projects using R744 (carbon dioxide) refrigerant, which achieves evaporation temperatures of -41 °C or -31 °C, with fluid outlet temperatures (e.g., Hydrogen) down to -38 °C.

• Eco-friendly refrigerants: we offer solutions that utilize green refrigerants like R744 (CO2) in the low-temperature circuit. We can also supply chillers that use other eco-friendly refrigerants like R32 or R290 (Propane), in addition to designing solutions that employ natural fluids like ammonia, ensuring a low environmental impact.

• High energy efficiency: the use of electronic expansion valves allows for high performance and a significant reduction in electricity consumption. The PLC management system also ensures greater efficiency by maintaining constant evaporation/condensation pressure.

• Robust and standardized construction: the units are supplied complete with an AISI 304 metallic frame and anti-vibration supports, and all main components (Evaporators/Condensers, Compressors, Oil Separators, etc.) comply with current regulations.

Technical details

Industrial chillers for sub-zero temperatures can be designed for cooling different heat transfer fluids, including:

• Ethylene or propylene glycol-based mixtures for food applications.

• High-performance non-freezing liquids (e.g., Temper, Hycool).

• Water, silicone oils, and diathermic oils.

For low-temperature fluid management, our units include specific components such as Bitzer compressors (screw for the first R513A stage and 4-cylinder for the second R744 stage), high-efficiency oil separators, and brazed plate PCHE evaporators.

Industrial applications

These systems are ideal for applications requiring precise control and very low temperatures, such as:

• Food sector: cooling of sauces, creams, chocolate, syrups, wine, beer, milk, juices, or for the thermal treatment of industrial dough mixers and solid products in cooling tunnels.

• Oil & Gas and Chemical-Pharmaceutical: complex applications such as the cooling of ultra-high-pressure Hydrogen (up to 1,050 bar), or for the control of raw materials stored in temperature-controlled environments.

• Other Processes: custom solutions are available in various sectors, such as metalworking or mechanics.