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Refrigerants topics include: Refrigerants classification, refrigerants designation system, refrigerants thermodynamic, physical and chemical properties.
Refrigerants are chemicals that can change from a liquid to a gas or vice versa at certain temperatures. They absorb heat from their surroundings and release that heat when they change state. Refrigerants are stored in an absorption system.
Some types of refrigerants include: Chlorofluorocarbons (CFCs): Nontoxic, nonflammable chemicals that contain carbon, chlorine, and fluorine. CFCs are used in aerosol sprays, blowing agents for foams and packing materials, as solvents, and as refrigerants. CFCs have been banned since the beginning of the 90's because of their negative environmental impacts. Hydrofluorocarbons (HFCs): Synthetic organic compounds composed of hydrogen, fluorine, and carbon. Common HFC refrigerants include R-32, R-125, R134a, R-143a, and R-152a. Natural refrigerants: Include ammonia, carbon dioxide, hydrocarbons, water, and air. Some natural refrigerants have been used in the marketplace for many decades. For example, ammonia (NH3, R-717), carbon dioxide (CO2, R-744), and propane (R-290) are all natural refrigerants. R410A: A zeotropic mixture of hydrofluorocarbons that can be used for general purpose air-conditioning. R410A is considered to be a non-ozone depleting refrigerant.
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