Chiller Systems Overview:
There are several types of chiller systems: water-cooled, air-cooled, and heat recovery units.
Water-Cooled Chillers:
These systems use a water-cooled condenser and evaporator.
The condenser is connected to a cooling tower, while chilled water from the evaporator circulates to the air handling unit (AHU).
Water-cooled chillers are more efficient due to stable refrigerant pressure and lower energy consumption.
Air-Cooled Chillers:
Air-cooled chillers also have a water evaporator that sends chilled water to the AHU.
Hot refrigerant gas is discharged to the outdoor condenser coil, where it cools and condenses into a liquid.
Air-cooled chillers are less common in commercial/industrial settings and are used when water supply systems are inadequate.
Heat Recovery Systems:
Heat recovery systems can use both water and air-cooled condensers and evaporators.
These systems utilize both evaporator and condenser temperatures to extract heat.
Pressure in Chiller Systems:
Low-Pressure Systems: Use centrifugal compressors and unique refrigerants that operate below atmospheric pressure or in a vacuum.
High-Pressure Systems: Use different compressors and operate above atmospheric pressure
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