Cooling water recooler are plug-in and ready-to-connect compact units for cooling liquids in circulation. As a rule, the liquids are water or water with additives, which are referred to as refrigerants based on their function.
Essentially, a chilled water recooler consists of a hydraulic part (with heat exchanger, water tank and a pump), which is intended to substitute a domestic water circuit, and a refrigeration part.

Via the hydraulic components, heat is transported from heat-producing machines or systems, in which the refrigerant is conveyed through the applications to be cooled. Ambient air is predominantly used here.
Thus, the heat exchanger in the dry cooler is a water/air heat exchanger.
Due to the process, the temperature of the cooling medium cannot be cooled lower than the air temperature.
In an active refrigeration system as a chiller, the heat exchanger in the recirculating chiller is a refrigerant evaporator.
This allows cold-carrier temperatures of -10° C to +20° C to be achieved, regardless of the ambient temperature.
All cooling variants, together with the hydraulic components, represent a ready-to-connect and prefabricated cooling unit. Without the loss of the cooling medium, closed-circuit cooling is thus realized. In the main, the advantage of a cooling water recirculating chiller, apart from the water resource-saving property, is that there are always constant conditions for the application to be cooled (temperature, pressure, etc.) and no creeping impairment of the cooling properties due to minerals permanently precipitating from fresh water can occur.