3.2.6 Freon group

3.2.6 Freon group

    • They are fluorocarbons of methane and ethane series.
    • They contain 1 or more of these halogens (chlorine, bromine, fluorine)
    • Non toxic, non-flammable, non-explosive, non- corrosive, non-irritant to human body and eyes.
    • Odourless, colourless
    • Will not react with food product stored in the refrigerated space.
    • Will not react with lubricating oil.
    • Has excellent thermodynamic properties
    • Only disadvantage is ozone layer is damaged.

FREON 11 (Trichloro monofluro methane – CCl3F)

    • Has the boiling point of 74.8ºF.
    • Used in air conditioning plants in a larger level factories, theatres

FREON 12 (Dichloro-difluro methane –CCl2F2)

    • Mostly used in domestic and commercial refrigeraters (in ice cream cabinets, display cabinets, deep freezer)
    • It is very widely used, colourless gas with mild odour
    • Heavier than air
    • Does not dissolve in water, moisture content should not exceed 0.0025% by weight
    • It does not react with metals like ferrous, aluminium, phosphor bronze
    • It attacks copper, copper alloys, zinc and bronze and dissolves in water
    • It does not react with lubricating oils in the absence of moisture, but oxidizes them in the presence of water vapour

FREON 13 (Mono chloro-trifluromethane) (CCl F3)

    • Widely used
    • Somewhat inferior in thermodynamic properties
    • FREON 21 – (dichloro - monofluoroethane) (CHCl2F)
    • FREON 22 – (monochloro – diflueroethane) (CHClF2)
    • There are used in small refrigeration plants
    • Used to obtain moderately low temperature (-50ºC)
Last modified: Saturday, 24 December 2011, 11:08 AM