An absorption chiller is a refrigeration machine, in which, in contrast to the compression refrigeration machine compaction influenced by temperature of the refrigerant solution. This is also known as a thermal compressor. The refrigerant is absorbed into a solvent circuit at low temperature in a second material and desorbed at higher temperatures. In the process, the temperature dependence of the physical solubility of two materials is used. Prerequisite for the process is that the two substances are mutually soluble in the temperature interval used in any ratio.
The absorption refrigeration cycle is considered the oldest known industrial process refrigeration, and originally was a request for freezing the main reason why in 1755 to deal with the development of heat pumps. In the first experiments of William Cullen (born April 15, † February 5, 1790), a physician and chemist, water was frozen with the aid of a vacuum. A continuously operating whole process was not developed.
