The Chiller is the heart of any large industrial or commercial refrigeration system. It produces chilled water (or other fluid) that is distributed to cool processes, environments, or equipment.
How a Chiller Works
The chiller operates through the vapor compression refrigeration cycle, consisting of 4 stages:
- Compression: The compressor raises the pressure and temperature of the refrigerant gas
- Condensation: The hot gas releases heat in the condenser and becomes liquid
- Expansion: The liquid passes through the expansion valve, reducing pressure and temperature
- Evaporation: The refrigerant absorbs heat from the water in the evaporator, cooling it
Types of Chillers
By Condensation Type
| Type | Characteristics | Application |
|---|---|---|
| Air | Condenser with fans | Simple installation, lower efficiency |
| Water | Requires cooling tower | Higher efficiency, higher initial cost |
By Compressor Type
| Compressor | Capacity | Efficiency |
|---|---|---|
| Scroll | 1-50 TR | Medium |
| Screw | 50-500 TR | High |
| Centrifugal | 200-2000+ TR | Very high |
| Oilfree | 100-1500 TR | Exceptional |
Industrial Applications
- Plastics Industry: Cooling molds and injection machines
- Food Industry: Pasteurization and preservation processes
- Data Centers: Server room cooling
- Hospitals: Surgical center and ICU climate control
- Chemical Industry: Temperature control in reactors