Types of Materials for Refrigerator Cooling and Air Conditioning

In general, cooling agents can be classified into four types as follows.
1 Inorganic Compounds
Material types include ammonia, sulfuric acids, carbon dioxide, and methyl chloride.
Ammonia (ammonia) is a cooling agent used in the absorption system and the large machines in the industry. Ammonia is colorless but has a penetrating odor. Ammonia is used in the cooling system that uses water cooling.
Sulfuric acid (sulfur dioxide) is a material widely used for cooling the refrigerator past. Sulfur dioxide is a colorless, odorless, but toxic. Therefore, it is not safe to use.
Carbon dioxide is a coolant is very low critical temperature 31 ° C. Lately, solid carbon dioxide (dry ice) as a second coolant. With this cooling material, cooling devices can be made ​​smaller and the gas quite safe.
Methyl cloride often used for cooling commercial use only. Nature sometimes can be burned in certain circumstances and also somewhat toxic. Therefore, the cooling material is not safe to use.
2 Hydrocarbons
Cooling agents include methane, Ethane, Propane, etc.. The properties of this cooling material has a low safety. It is therefore not used in the household. The cooling material generally used in the petrochemical industry.
3 Halogenated Carbide
Halogenated Carbide is a general term for hydrocarbons containing one or more halogens such as fluorine, among others, (F), chlorine (cl), iodine (I), and bromine (Br) The use of halogen coolants now gaining popularity due to meet the requirements security). In addition there containing Fluorine (F) is called Freon. Freon is colorless, almost odorless, boiling point is wide-ranging, non-toxic, non-irritating, does not cause rust, does not explode under conditions of use. Are chemically stable and highly secure. Freon coolant type that is produced in the form of R-11, R-12, R-13, R-12, etc.
Coolant circulating in the market and is widely used in Indonesia is Freon produced by E. 1 DuPont (USA). Brands and manufacturers of other cooling agents such as Genetron® manufactured by Allied Signal Corporation (USA), Forane produced Elf Atochem (Australia), and Klea produced ICI Americas (USA).
d. Azeotropic Mixture
Azeotropic Mixture is a cooling agent mixture of 2 (two) different coolants, for example-134A Refrigerant. Refrigerant-134A specification as follows.
1.-colored and has a smell like ether.
2.-shaped gas liquids that can not be lit or flammable at room temperature (27 ° C).
3 Do not damage the ozone layer (03)
4 Boiling point -26.1 ° C.
5. critical temperature 101.1 ° C.
6. critical pressure 4.06 MPa (mega Pascal).
Some brands of similar materials Refrigerant-134A refrigerant which is found in the market such as Freon 134A, SUVAA134A, HFC-134A,-134A Genetron®, and KLEA Forane-134 A.