Editing Adsorption (section)

==Adsorption chillers==
[[File:Adsorption chiller schematic.svg|thumb|A schematic diagram of an adsorption chiller: (1) heat is lost through evaporation of refrigerant, (2) refrigerant vapour is adsorbed onto the solid medium, (3) refrigerant is desorbed from the solid medium section not in use, (4) refrigerant is condensed and returned to the start, (5) & (6) solid medium is cycled between adsorption and desorption to regenerate it.]]
Combining an adsorbent with a refrigerant, [[Adsorption refrigeration|adsorption chillers]] use heat to provide a cooling effect. This heat, in the form of hot water, may come from any number of industrial sources including waste heat from industrial processes, prime heat from solar thermal installations or from the exhaust or water jacket heat of a piston engine or turbine.

Although there are similarities between adsorption chillers and [[absorption refrigerator|absorption refrigeration]], the former is based on the interaction between gases and solids. The adsorption chamber of the chiller is filled with a solid material (for example zeolite, silica gel, alumina, active carbon or certain types of metal salts), which in its neutral state has adsorbed the refrigerant. When heated, the solid desorbs (releases) refrigerant vapour, which subsequently is cooled and liquefied. This liquid refrigerant then provides a cooling effect at the evaporator from its [[enthalpy of vaporization]]. In the final stage the refrigerant vapour is (re)adsorbed into the solid.<ref>{{cite book | last = Pilatowsky | first = I. |author2=Romero, R.J.|author3= Isaza, C.A.|author4= Gamboa, S.A.|author5= Sebastian, P.J.|author6= Rivera, W. | chapter = Sorption Refrigeration Systems | title = Cogeneration Fuel Cell-Sorption Air Conditioning Systems | series = Green Energy and Technology | year = 2011 | publisher = Springer | isbn = 978-1-84996-027-4 | pages = 99,100 | doi = 10.1007/978-1-84996-028-1_5 }}</ref> As an adsorption chiller requires no compressor, it is relatively quiet.