A chiller machine is a type of refrigeration system that is used to cool down a variety of liquids and gases. It works by circulating a coolant, such as water or glycol, through a heat exchanger to remove heat from the liquid or gas. The heat exchanger then transfers the heat to a separate cooling medium, such as air or water, which dissipates the heat away from the system. Chiller machines are used in a variety of applications, such as air conditioning, food and beverage cooling, industrial process cooling, and medical cooling. They are often used in combination with other cooling systems, such as evaporative coolers and condensers, to provide a more efficient cooling solution. Chiller machines are typically powered by electricity, but some models are powered by natural gas or propane.