Chillers are special devices in the range of climate equipment. The name of these machines comes from the English word chillmeaning “cold, cool”, and from it you can immediately guess about their purpose.
Chillers are special refrigeration units often used in industry, in various industries and wherever there are powerful climate systems that need cooling. The chiller is responsible for this, taking heat from any liquid — water, glycol solution or industrial brine, after which the cooled liquid enters through the pipes to where it is necessary to lower the temperature. Chillers that can operate with liquid temperatures below freezing are often used in the food industry.
Often, chillers are used together with fan coil units — the installation of such a system is advisable, for example, in a large building that needs to be equipped with an air conditioning system, since the chiller-fan coil connection allows large distances between the components. One chiller may be enough for several rooms. Thus, the cooling efficiency of the building will be quite high at a relatively low cost.
As with most temperature control devices, the most important part of the chiller is the compressor. There are several types of chiller compressors — screw, centrifugal, scroll.
The range of chillers is quite large. They are distinguished not only by the type of compressor, but also by ways of lowering the temperature of the condenser. It can be cooled by air using axial or centrifugal fans. Remote condensers are also air-cooled. There are also liquid-cooled condensers.
As a rule, chillers are designed for workloads of 500 kW and above.
In order to make your choice among the whole variety of chillers, determine what type of device you need, what liquid it will work with, what temperature results you expect from it. The installation of the chiller must be carried out exclusively by qualified personnel.