Ammonia as a refrigerant

Another great use for ammonia, in this case its not burned so leaks and smell are an issue, though as the post points out quantities are tiny compared with ammonia in fertilizer.

ammoniaman

Prior to 1850, a brilliant Australian Engineer, James Harrison invented the vapour compression refrigeration system by “closing the loop”. He was aware that when ether evaporated it made printing type set cold when used for cleaning. His invention collected the evaporated gas, compressed it, condensed it and fed it back as a liquid to be re-evaporated, thereby forming a closed loop. Refrigeration was born. By 1855, Harrison was manufacturing  ice machines operating on ether in the closed refrigeration circuit, while the rest of the world were still cutting ice blocks from frozen rivers and lakes. In 1856, Harrison was awarded patent No. 747 for his invention.

In the 1860’s, ammonia started to be used in refrigeration as it was seen as a much safer alternative than ether.  Ammonia quickly gained popularity and by 1900 it dominated the world of refrigeration as the refrigerant of choice. The ammonia domination remained through…

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