Chillers are devices that remove heat from water in industrial and commercial applications. They function in water treatment by cooling the water to the desired temperature for use in various processes. Chillers work by circulating water through a refrigeration cycle, which removes heat from the water and transfers it to the surrounding air. In water treatment systems, chillers are commonly used to cool water in large-scale processes such as power generation, manufacturing, and chemical production. By maintaining the desired temperature, chillers can improve the efficiency and effectiveness of these processes while also protecting equipment and reducing energy costs.