a) Constant Speed Centrifugal Chiller: Speed of the impeller wheel is constant                   while compressing the refrigerant vapor by the application of Centrifugal                       Force.
          b) Variable Speed Drive Centrifugal Chiller: Speed of the impeller wheel is                            variable while compressing the refrigerant vapor by the application of                            Centrifugal Force.
          c) Constant Speed Screw Chiller: Constant Speed for squeezing refrigerant                         between two rotating helical rotors.
          d) Absorption Chiller: Absorption fluid is evaporated in a low pressure system to                 remove heat.

    

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