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It is a refrigeration unit based on Vapour Absorption Refrigeration Cycle (typically refrigerants used are Water or Ammonia).
usually refrigerant is ammonia and water.Meanwhile absorber is water, lithium bromide and calcium chloride. usually that be in paired is ammonia-water or lithium barium-water
R-134
cause its a gas
Your condensor outside , where the compressor is . should have an information plate showing the type of refrigerant used
R134a
it depends on many factors, like indoor and outdoor temps, and type of system and refrigerant being used.
R-134a is the only refrigerant approved by the automotive industry. It requires conversion to be used in an R-12 system.
Disposable refrigerant containers are only used for virgin refrigerant.
used as cooling and freezing agent
Ammonia is used for refrigeration in an absorption type plant use for large cold stores. The ammonia is not the refrigerant itself, this is usually water, but as means of absorbing the water vapour and returning it as a liquid to the start of the cycle. Unlike a conventional fridge that uses a compressor to do this. The advantages of ammonia cycle plants are that they have no moving parts and can be built to any size. The motive power for the system can be any source of heat which separates the water and the ammonia at the cycle start.
Refrigerant is the material that absorbs heat when evaporating and releases heat when condensing. If not for refrigerant in the system, it would not function. Before refrigerant, other more dangerous gases were used to achieve the same goal, such as propane.