What is Chiller?
[[File:Chiller.jpg|thumb|York International Water Source Chiller]] A '''chiller''' is a machine that removes heat from a [[liquid]] through an [[Heat pump and refrigeration cycle|vapor compression]], [[adsorption refrigeration]], or [[absorption refrigeration cycles]]. This liquid can then be moved through a [[heat exchanger]] to cool equipment. Refrigeration makes [[waste heat]] as a byproduct that must be removed from it or for greater efficiency it can be recovered for heating purposes.<ref>{{Cite web|url=https://www.academia.edu/signup?a_id=65054884|title=Academia.edu - Share research|website=Academia.edu|access-date=24 January 2022}}</ref> Vapor compression chillers may use any of a number of different types of [[Gas compressor|compressors]].The most used today are the hermetic scroll, semi-hermetic screw, or centrifugal compressors. The condensing side of the chiller can be either air or water-cooled. The chiller is often cooled by an induced or forced draft [[cooling tower]]. Absorption and adsorption chillers need a heat source to work.<ref>{{Cite web|url=https://www.thomasnet.com/articles/machinery-tools-supplies/types-of-chillers|title=Types of Chillers - A Thomas Buying Guide|website=Thomasnet.com|access-date=2023-05-28|archive-date=2023-05-28|archive-url=https://web.archive.org/web/20230528020255/https://www.thomasnet.com/articles/machinery-tools-supplies/types-of-chillers/|url-status=dead}}</ref><ref>{{Cite web|url=https://theengineeringmindset.com/absorption-chiller-works/|title=Absorption Chiller, How it works|first=Paul|last=Evans|website=Thengineeringmindset.com|date=September 26, 2017}}</ref> [[File:Water Cooled Chiller Diagram.png|thumb|Diagram of a water cooled chiller system]] Chilled water is used to cool and dehumidify air. This is used in large commercial, industrial, and [[wikt:institution|institutional]] buildings. For example, schools, hospitals, and factories. Water-cooled chillers can be liquid-cooled (through cooling towers), air-cooled, or [[Evaporative cooler|evaporatively cooled]]