Question

Which of the following is classified as an A₂L refrigerant?

a) R-32
b) R-404A
c) R-123
d) R-134a

Answer 1

`R-32` is the refrigerant classified as an
`A₂L` refrigerant, and it is mildly flammable, energy-efficient, and has a low global warming potential. The condenser is the component in an air conditioning system that converts gas into liquid.
`Freon-12` would be a gas at room temperature due to its boiling point.

Step-by-step explanation:

The refrigerant classified as an
`A₂L` refrigerant is
`R-32. A₂L` refrigerants are mildly flammable and have a lower flammability and heat of combustion compared to other categories. These characteristics make
`R-32` an attractive choice since it has a low global warming potential and is more energy-efficient than many other refrigerants. Other options such as
`R-404A, R-123`, and
`R-134a` have different safety classifications. For instance
`R-134a` is classified as an A1 refrigerant, which means it's non-flammable. Regarding the conversion process in an air conditioning system, the component that converts gas into liquid is the condenser. The evaporator on the other hand, converts liquid refrigerant into gas.

`Freon-12`, with a boiling point of
`-29.8 °C` would be a gas at room temperature, which is typically around
`25 °C`. This information is important in understanding the phase of refrigerants under different conditions. It's also worth noting that due to environmental concerns chlorofluorocarbons (CFCs) like Freon are being phased out because they damage the ozone layer, which protects the Earth from harmful ultraviolet radiation. Alternatives, such as hydrochlorofluorocarbons (HCFCs) are being used in place of CFCs though they too are being phased out for more environment-friendly options like
`R-32`.