Dual turbo centrifugal chiller

Abstract

A dual turbo centrifugal chiller includes: first and second evaporators connected in series or in parallel; first and second condensers connected in series or in parallel; and first and second compressors including impellers, wherein cold water passes through the second evaporator after passing through the first evaporator, and cooling water passes through the second condenser after passing through the first condenser, the first compressor containing a refrigerant connects the first condenser to the second evaporator, and the second compressor containing a refrigerant connects the second condenser to the first evaporator, and the impellers of the first compressor and second compressor are rotated simultaneously using a single driving unit.

1 . A dual turbo centrifugal chiller, comprising:
 first and second evaporators connected in series or in parallel;   first and second condensers connected in series or in parallel; and   first and second compressors including impellers,   wherein cold water passes through the second evaporator after passing through the first evaporator, and cooling water passes through the second condenser after passing through the first condenser,   the first compressor containing a refrigerant connects the first condenser to the second evaporator, and the second compressor containing a refrigerant connects the second condenser to the first evaporator, and   the impellers of the first compressor and second compressor are rotated simultaneously using a single driving unit.   
     
     
         2 . The dual turbo centrifugal chiller according to  claim 1 ,
 wherein the impellers of the first and second compressors are connected with a single rotation shaft, and   the impellers of the first and second compressor are rotated simultaneously as the rotation shaft is rotated using the driving unit.   
     
     
         3 . The dual turbo centrifugal chiller according to  claim 2 ,
 wherein the driving unit is connected to the center of the rotation shaft, and   the impellers of the first and second compressors are opposed with the center of the rotation shaft between them.   
     
     
         4 . The dual turbo centrifugal chiller according to  claim 1 , wherein inlet portions of the first and second compressors are provided with inlet guide vanes (IGVs) respectively. 
     
     
         5 . The dual turbo centrifugal chiller according to  claim 3 , wherein the first and second compressors have different capacities from each other.