Refrigeration plant using Ammonia as the cooling agent. Ammonia is a compound of nitrogen and hydrogen (chemical formula NH3), it is a colourless gas with quite a pungent scent. Anhydrous ammonia is used in refrigeration systems as R717 and was widely used before chlorofluorocarbons, or Freon gases, in Industrial refrigeration applications. It has high energy efficiency and relatively low cost compared to some other refrigerants.
Ammonia is not considered suitable for small-scale use or domestic applications due to its toxicity.
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