Chillers are mechanical devices used to remove heat from a liquid through a vapor-compression or absorption refrigeration cycle. They are commonly used in commercial and industrial settings to cool large spaces, such as buildings, factories, and data centers. The cooled liquid is then circulated through a system to absorb heat from the environment, maintaining a comfortable temperature. These systems can vary in size and capacity, depending on the cooling needs. Chillers are often categorized into two main types: air-cooled and water-cooled. Air-cooled chillers use air to dissipate heat, while water-cooled chillers use water, making them more efficient for larger applications.