Energy Efficient Industrial Chillers and Coolers

Medium temperature solution: adiabatic cooling

Adiabatic dry coolers are often referred to as the best solution for optimising resources and achieving good performance at medium temperatures.

They are systems that combine the air cooling of classic dry coolers with adiabatic pre-cooling: they are most often known for saving water (used only for short wetting cycles). However, the management of operating parameters via the standard control panel also allows excellent control over energy use.

Low temperature solution: chillers with free-cooling

What if the demand is to have output fluids with temperatures lower than ambient? Industrial chillers also allow energy savings while maintaining high performance. Provided certain technical peculiarities are integrated into the system.

One of these is certainly the possibility of operating in free-cooling mode. In chillers equipped with this function, three different modes can be operated depending on the time of year and the specific requirement:

• Standard free-cooling system: allows the set temperature to be maintained even with ambient air temperatures higher than those of the process fluid, thanks to the work of the compressors.
• Entirely free-cooling system: the liquid is cooled by operating only the fans with very low electricity consumption (like a dry cooler). This allows temperatures of the cooled liquid to be 5°C higher than the ambient air temperature.
• “Intermediate” system: active free-cooling chiller, in which cooling takes place through the combined effect of the cooling and free-cooling sectors.

It can be seen that different performances and different energy utilisation are allowed depending on the demand.