Why is ammonia a better refrigerant alternative than CFC?
September 30th, 2009 | 
Author: Ammonia is the preferred choice of refrigerant in industrial refrigeration systems. Thermodynamic characteristics of ammonia are very similar to halocarbons. Dichlorodifluoromethane has the same boiling temperature as ammonia.
These are not toxic to humans, thus chlorofluorocarbons are used for home refrigerators. For home use in refrigerators, pure ammonia is considered to be harmful but ammonia refrigeration systems are still used for industrial purposes.
Soft drinks, juices, fish and poultry items and other perishable items that we consume; all use ammonia refrigeration systems. In fact, the entire food processing industry uses ammonia refrigeration. Ammonia has many advantages and it was seen as a major step forward in refrigeration engineering at one time. Especially, after halocarbons were found to cause ozone depletion and global warming, ammonia was seen as a safer alternative. But, there is one drawback of ammonia.
Lots of leaks and spills are associated with ammonia and handling of ammonia requires utmost care. Any contact with ammonia vapor or liquid can lead to disastrous results. Workers working in processing plants, cold storages, and other units are at a very high risk.
Due to the pungent odor, any ammonia leak or spill can be easily detected. Good design and equipment choices, protective clothing, safety features like seal caps for valves; they all can prevent any untoward incidents.
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Refrigerant is mainly required for preservation of food items and several other materials for a longer period of time. There are several options in the market but of them ammonia is better and preferred than CFC as it does not causes ozone depletion unlike CFC.
Refrigerant is an important item as it is needed for preservation of food items for a longer period of time. But today ammonia has replaced cfc due to the fact that cfc causes ozone layer depletion.
In industrial refrigeration systems, Ammonia is an ideal choice. Pure ammonia is not used as domestic purpose in refrigerator as they are harmful but ammonia refrigeration systems are used for industrial need.