A water chiller is a mechanical device used to facilitate heat exchange from water to a refrigerant in a closed loop system. The refrigerant is then pumped to a location where the waste heat is transferred to the atmosphere.

Industrial water chillers aregenerally used for large capacity applications, where the heat generated by aircooled chillers creates a problem. They are generally used for large capacity applications, where the heat generated by an air cooled water chiller creates aproblem. Water cooled chillers absorb heat from process water and transfer itto a separate water source such as a cooling tower, river, pond, etc