What is refrigerant designation?

According to an international agreement, refrigerants are represented by the letter R (as in Refrigerants) followed by a two- or three-digit number and, in some cases, one or two letters. The designation Rxyz is determined by the chemical composition of the molecule, as described below.

How do you classify refrigerants?

There are four main groups of refrigerants and they are determined by their chemical constituents but are generally classified as Chlorofluorocarbons (CFCs), Hydro chlorofluorocarbons (HCFCs), Hydro fluorocarbons (HFCs) and Natural Refrigerants [7]. …

How do you name refrigerants?

Refrigerants are named using an “R” (as in Refrigerant) following by a dash and a two to four digit number. Some refrigerants will also have a letter prefix or suffix that further specifies the chemical makeup. Refrigerants are classified into 10 groups called series.

What is designation of h2o as refrigerant?

Water: Molecular weight is 18, ∴ the designation is R 718. iii) Mixtures: Azeotropic mixtures are designated by 500 series, whereas zeotropic refrigerants (e.g. non-azeotropic mixtures) are designated by 400 series. Azeotropic mixtures: R 500: Mixture of R 12 (73.8 %) and R 152a (26.2%)

What are A1 refrigerants?

A1 refrigerants are identified as having “no flame propagation”1 but common A1 refrigerants such as R-410A or R-22 in use today can burn under the right conditions. Refrigerants are tested to ASTM E681 at a temperature of 60°C but at higher temperatures they can become flammable.

Which one will be the designation of Zeotropic refrigerants?

iii) Mixtures: Azeotropic mixtures are designated by 500 series, whereas zeotropic refrigerants (e.g. non-azeotropic mixtures) are designated by 400 series.

How many classes of refrigerants are there?

The three main flammability classifications are class 1, for refrigerants that do not propagate a flame when tested as per the standard; class 2, for refrigerants of lower flammability; and class 3, for highly flammable refrigerants such as the hydrocarbons.