What is a chiller


Chiller is a equipment used for air conditioning purposes. Basically it produces hot or cold water to warm or cool the air for space heating and cooling purpose.

Chiller has following components.

  • Compressor
  • Evaporator or cooler
  • Condensor
  • Expansion device

Chiller works on refrigeration cycle either vapour absorption or vapour compression.

Chiller are of generally following types:

1. Absorption chillers

2. Water cooled and air cooled chillers : They are most popular. Air cooled chillers are available upto 500 TR while water cooled chillers are available upto 3000 TR & with some modifications, upto 10,000 TR.

Depending on the type of compressor being used , air cooled chillers comes in scroll and screw compressor types .

While water cooled chillers comes with scroll, Screw and centrifugal compressors.

Further scroll compressors are only used upto 100 TR , Scroll upto 500 TR and above 500 TR, only centrifugal compressors are used.


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