Free cooling and dry coolers

Industrial chillers remove process heat from molds, hydraulic oil and barrels, keeping production stable through long runs and hot summer months. Perotec Systems supplies standard cooling solutions tailored to process requirements — for plants that run all year round, free cooling and dry coolers can meaningfully cut compressor energy use.

How do free cooling and dry coolers cut cooling costs?

Free cooling uses cold outside air to cool the process water instead of a refrigeration compressor circuit, whenever the outside temperature is low enough relative to the water temperature the process needs. When conditions allow it, the chiller compressors idle or run at reduced load, which directly cuts electricity consumption. A dry cooler goes a step further — it rejects heat to air with no refrigeration circuit at all, purely through air flowing over a heat exchanger, and can run on its own during colder periods or alongside a chiller that takes over once the outside temperature rises. In a climate like Serbia's, the outside temperature is below the process return-water temperature for a large part of the year, so these solutions bring the biggest savings to plants that run continuously, around the year and across shifts. Whether free cooling or a dry cooler makes sense for a given plant depends on the process water temperature required, annual running hours and local climate conditions; these solutions are usually combined with a standard chiller in one system, so the plant always has reliable cooling regardless of the season.

How does Perotec Systems size and deliver the solution?

We size the cooling system from your plant heat balance free of charge, taking into account the free-cooling potential at your location. Once a solution is chosen, we cover delivery, installation and commissioning, operator training, and service and original spare parts, across Serbia, Croatia, Bosnia and Herzegovina, North Macedonia and Montenegro.

See also our air-cooled and water-cooled chillers, and the article Chillers or Free Cooling: Sizing Industrial Cooling for a Molding Plant and Chiller Not Reaching Setpoint Temperature: Causes and Fixes. The full chiller range is on the industrial chillers page, and to get a solution matched to your process contact us — we reply within one business day.