Precise temperature. 24 hours a day, 365 days a year.

To properly select a chiller, we need basic process data: required cooling capacity (kW), average and peak heat load, supply and return temperatures (e.g. 12/7 °C), type of medium (water or glycol mixture), flow rate, and system operating mode (24/7, cyclic, or seasonal). Environmental conditions are also important – whether the unit is installed indoors or outdoors, ambient temperature, and any constraints regarding noise or installation space.

Cooling capacity depends on the amount of heat that must be removed from the process. It is calculated based on machine heat loads, cooling medium flow rate, and temperature difference (ΔT) between supply and return. It is also important to consider peak loads and future production expansion during sizing.

Air-cooled chillers dissipate heat directly into the environment via condensers with fans, making them suitable for simple outdoor installation without additional cooling infrastructure. Water-cooled systems use cooling towers or other water sources, enabling higher efficiency in larger industrial systems and more stable operation under high loads.

Glycol is used when there is a risk of freezing or when the system is installed outdoors. A water-glycol mixture lowers the freezing point and protects pipes, heat exchangers, and pumps from damage. When selecting the concentration, it is important to consider minimum ambient temperature and the effect of glycol on flow and heat transfer.

In most cases, energy consumption can be significantly reduced. This is achieved through optimal system sizing, power control (e.g. inverter or VSD compressors), proper temperature difference (ΔT) settings, and optimized flow rates. In certain applications, additional savings can be achieved with free-cooling solutions, where part of the cooling is provided by ambient air without compressor operation.

Preventive maintenance is crucial for reliable system operation. Regular cleaning of condensers and heat exchangers, leak checks, inspection of fans, pumps, and control systems, and monitoring of the cooling medium prevent efficiency losses and unexpected downtime. Proper service intervals extend equipment lifetime and ensure stable process temperatures.