A chiller works on the principle of vapor compression or vapor absorption. ... As the heat-transfer takes place, the refrigerant evaporates, changing from a low-pressure liquid into vapor, while the temperature of the process coolant reduces. The refrigerant then flows to a compressor, which performs multiple functions.

What are the 4 main components of a chiller system?

Chillers consist of four basic components; an evaporator, a compressor, a condenser, and an expansion unit. Every chiller system contains a refrigerant. The process starts with a low-pressure refrigerant entering the evaporator.

What is the difference between HVAC and chiller?

In cold weather, the air conditioning component of an HVAC system becomes redundant as air cooling is not required. Chiller systems can, however, be modified to provide heating and thus remain fully operational regardless of prevailing weather conditions.