Chillers play a key role in HVAC systems, and their working principles are closely related to the operation of the entire system.
First, the chiller produces chilled water through its core component, the chiller. In this process, the refrigerant is exchanged with the chilled water in the evaporator of the chiller, which vaporizes and lowers the temperature of the chilled water.
Next, the vaporized refrigerant is transformed into a high-temperature and high-pressure gas under the action of a compressor. As these gases pass through the chiller’s condenser, they are cooled by the cooling water from the cooling tower, changing them back to a low-temperature, low-pressure liquid from a gaseous state.
At the same time, the cooled chilled water is pumped to the heat exchanger of the air handling unit. Here, the chilled water is exchanged with mixed air for hot and cold exchange, forming a cold air source. This cold air is then fed through the supply air duct into the room that needs to be adjusted to cool down.
Cooling towers play a key role throughout the cycle. Cooling towers use the water cycle to dissipate heat, ensuring a consistent supply of chilled water to chillers. Pumps and lines are responsible for delivering chilled water to where it is needed, ensuring that the entire system is functioning properly.
To sum up, the chiller provides cold air to the room through the refrigeration cycle and cooling water circuit circulation in the HVAC system to achieve the effect of cooling. The principle of operation involves several components and cyclic processes that work together to regulate the temperature of the indoor environment.
