SINGLE SCREW CHILLERS IMM
8
Engineered for Flexibility and Performance
3. Working Principles
3.1 Working principles of single screw chiller without Flash-tank Economizer
1. Low temp/pressure refrigerant gas enters the compressor. After compression, the gas will be
discharged into oil separator in high temp/pressure;
2. Oil is separated from refrigerant in oil separator. The former goes back to compressor and the
later goes to condenser;
3. Refrigerant gas is condensed to high pressure liquid and then goes through expansion valve to
the evaporator with low pressure and temperature;
4. Refrigerant liquid absorbs heat from AHUs in evaporator so that the chiller can provide lower
temperature water;
5. Refrigerant gas goes back to compressor for the next circulation.
Fig.3-1
