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  2. Dichlorodifluoromethane - Wikipedia

    en.wikipedia.org/wiki/Dichlorodifluoromethane

    Dichlorodifluoromethane (R-12) is a colorless gas usually sold under the brand name Freon-12, and a chlorofluorocarbon halomethane (CFC) used as a refrigerant and aerosol spray propellant. In compliance with the Montreal Protocol, its manufacture was banned in developed countries (non-article 5 countries) in 1996, and in developing countries ...

  3. Refrigerant - Wikipedia

    en.wikipedia.org/wiki/Refrigerant

    Refrigerant. A refrigerant is a working fluid used in the refrigeration cycle of air conditioning systems and heat pumps where in most cases they undergo a repeated phase transition from a liquid to a gas and back again. Refrigerants are heavily regulated because of their toxicity and flammability and the contribution of CFC and HCFC ...

  4. List of New York City Subway R-type contracts - Wikipedia

    en.wikipedia.org/wiki/List_of_New_York_City...

    R12: 5703–5802 American Car & Foundry 1948 Retired, 5760/5782 preserved R13: Track cleaning unit: Never purchased: R14: Passenger cars 5803–5952 American Car & Foundry 1949 Retired, 5871 preserved, 5944 in work service R15: 5953–5999, 6200–6252 1950 Retired, 6239 preserved

  5. R-406A - Wikipedia

    en.wikipedia.org/wiki/R-406A

    R-406A is a refrigerant invented by George H. Goble. [citation needed] It is a mixture of three components: chlorodifluoromethane (R-22), isobutane (R-600a), and 1-chloro-1,1-difluoroethane (R-142b) in the ratio 55/4/41. [ 1] This refrigerant was designed as a drop-in replacement for dichlorodifluoromethane (R-12) which is compatible with the ...

  6. 1,1,1,2-Tetrafluoroethane - Wikipedia

    en.wikipedia.org/wiki/1,1,1,2-Tetrafluoroethane

    1,1,1,2-Tetrafluoroethane is a non-flammable gas used primarily as a "high-temperature" refrigerant for domestic refrigeration and automobile air conditioners. These devices began using 1,1,1,2-tetrafluoroethane in the early 1990s as a replacement for the more environmentally harmful R-12. Retrofit kits are available to convert units that were ...

  7. Automotive air conditioning - Wikipedia

    en.wikipedia.org/wiki/Automotive_air_conditioning

    R-12 was used in automotive air conditioning systems until the mid-90s when production was banned by the government and replaced with a new refrigerant, R-134a. R-12 can still be bought and sold but is no longer produced. This makes R-12 very expensive and hard to find. [41] R-12’s global warming potential number is very large at about 11,000 ...

  8. List of refrigerants - Wikipedia

    en.wikipedia.org/wiki/List_of_refrigerants

    Learn about the different types of refrigerants, their properties, applications, and environmental impacts on Wikipedia's comprehensive list.

  9. HC-12a - Wikipedia

    en.wikipedia.org/wiki/HC-12a

    HC-12a, also called ES-12a, OZ-12a, DURACOOL 12a [1] and Hydrocarbon Blend B, is a "drop-in" replacement refrigerant for Freon-12 and to a lesser extent, R-134a.HC-12a is a mixture of hydrocarbons, specifically propane (R-290) and isobutane (R-600a), and is therefore considered nearly non-ozone-depleting compared to dichlorodifluoromethane (R-12, Freon-12) or 1,1,1,2-tetrafluoroethane (R-134a).

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