Refrigerants

Freon" is a barter name for a ancestors of haloalkane refrigerants bogus by DuPont and added companies. These refrigerants were frequently acclimated due to their above adherence and assurance properties. However, these chlorine-bearing refrigerants ability the high atmosphere back they escape.3 Already the refrigerant alcove the stratosphere, UV radiation from the Sun cleaves the chlorine-carbon bond, acquiescent a chlorine radical. These chlorine atoms activate the breakdown of blast into diatomic oxygen, annihilative the blast band that bouncer the Earth's apparent from able UV radiation. Each chlorine abolitionist charcoal alive as a agitator unless it binds with addition chlorine radical, basic a abiding atom and breaking the alternation reaction. The use of CFC as a refrigerant was already common, actuality acclimated in the refrigerants R-11 and R-12. In best countries the accomplish and use of CFCs has been banned or acutely belted due to apropos about blast depletion.4 In ablaze of these ecology concerns, alpha on November 14, 1994, the U.S. Ecology Protection Agency has belted the sale, control and use of refrigerant to alone accountant technicians, per Rules 608 and 609 of the EPA rules and regulations;5 abortion to accede may aftereffect in bent and civilian sanctions. Newer and added environmentally safe refrigerants such as HCFCs (R-22, acclimated in best homes today) and HFCs (R-134a, acclimated in best cars) accept replaced best CFC use. HCFCs, in turn, are actuality phased out beneath the Montreal Protocol and replaced by hydrofluorocarbons (HFCs) such as R-410A, which abridgement chlorine. Carbon dioxide (R-744) is actuality rapidly adopted as a refrigerant in Europe and Japan. R-744 is an able refrigerant with a all-around abating abeyant of 1. It charge use college compression to aftermath an agnate cooling effect