Liquid chiller

What is a liquid chiller?
A liquid chiller is a refrigerating machine which is used for cooling liquids. Liquid chillers are used in various fields – in engineering, food, alcohol, chemical, metal industry, medicine etc. In addition, liquid chillers are widely used in central air conditioning system.

A conditioning system on the basis of a liquid chiller is used for multi-zone central air conditioning where there are a lot of rooms. In contrast with other air conditioners a liquid chiller is used as a coolants or antifreeze. A liquid chiller operates in a system with a room terminal – fan coil units.

A fan coil unit is an analogue of the indoor unit of a split system, but operates on water. A fan coil unit as well as an indoor unit can be wall type, ceiling type, floor type and cassette type. Number of fan coil units can be different and can be limited only by a liquid chiller’s productivity.

A liquid chiller is connected with fan coil units by the means of a pipe system. Unlike any of the other air conditioning systems the length of system ‘s pipelines  with a  liquid chiller and fan coil units is practically unlimited and depends only on pump rate. In addition to this, the multilayer wiring of a liquid chiller is much cheaper, because the rights-of-way, where the coolant circulates are not made from copper as in gas-filled systems, but are usual water pipes.

A liquid chiller is rather compact, can be fixed on the roof or in the back room of the building without spoiling the visual environment of the facade.

Liquid chillers may vary according to the type of refrigeration cycle (vapor compression or absorption), the construction (monoblock or with remote condenser), the type of condenser cooling (air or water cooling), connection diagrams and the availability of the heat pump. Liquid chillers fitted out with a heat pump operate all year round and can completely replace the water heating.

Therefore, choosing between the VRV-system and liquid chillers, we should give the highest priority to the number of room terminals.

The wattage of liquid chillers varies from a few kilowatts to several thousand of kilowatts, so their scope of applicability is also varies from conditioning a small cottage to serving large commercial and residential complexes and industrial facilities.