How chillers work

Chillers are a common type of refrigeration equipment used in industrial, commercial and residential buildings. It works on the basis of a refrigeration cycle that cools indoor spaces by absorbing heat from the indoor environment and expelling it outdoors.
Chillers work in four simple steps: evaporation, compression, condensation and expansion.
The first is the evaporation phase. In the evaporators of chillers, refrigerants (usually ammonia, freon, etc.) change from liquid to gas, absorbing heat from the indoor air. As the coolant cools, so does the air in the room.
Next comes the compression phase. The refrigerant gas is compressed by the compressor, raising its temperature and pressure. In the process, the molecules of the coolant become smaller, allowing it to release heat more efficiently.
Then there is the condensation phase. The refrigerant gas radiates heat by coming into contact with a cooling medium in the external environment, usually water or air, through a condensator. The coolant cools and becomes liquid.
Then there is the expansion phase. The refrigerant enters the vaporizer through an expansion valve, reducing pressure and temperature. In the process, the coolant again becomes a gas, ready to absorb heat from the indoor air and cycle.
Through this refrigeration cycle, the chiller continuously absorbs and discharges heat from the indoor environment to the outside, thus cooling the indoor space. It works like a home refrigerator, but on a larger scale and for a wider range of uses.
Chillers are usually composed of evaporators, compressors, condensers and expansion valves. Evaporators and condensers are heat exchangers in the refrigeration cycle that absorb and release heat. The compressor is the main component of the refrigeration cycle and is responsible for compressing the refrigerant gas. Expansion valves control the flow and pressure of the coolant.
The working principle of the chiller makes it an efficient and reliable refrigeration equipment. It can adjust the indoor temperature as needed, and is suitable for buildings and places of all sizes. At the same time, the chiller can also be used with other systems (such as air conditioning system, heating system, etc.) to achieve indoor environmental control.