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- Path: sparky!uunet!stanford.edu!agate!hafnium.cchem.berkeley.edu!avk
- From: avk@hafnium.cchem.berkeley.edu (Tony Konashenok)
- Newsgroups: rec.autos.tech
- Subject: Re: Charging A/C with Freon
- Date: 22 Jul 1992 21:07:57 GMT
- Organization: University of California, Berkeley
- Lines: 45
- Distribution: na
- Message-ID: <14kindINNdks@agate.berkeley.edu>
- References: <76292@ut-emx.uucp> <1992Jul22.091515.5160@mr.med.ge.com>
- NNTP-Posting-Host: hafnium.cchem.berkeley.edu
-
- In article <1992Jul22.091515.5160@mr.med.ge.com>, hinz@bonfire (David Hinz Mfg 4-6987) writes:
- |> lihan@ccwf.cc.utexas.edu (Bruce G. Bostwick) writes:
- |> : In article <1992Jul20.153331.24083@bnr.ca> Peon w/o Email priv (Eric Youngblood) writes:
- |> :
- |> : Speaking of which, are ALL CFC's ozone-killers or just the ones with
- |> : chlorine in them? I would imagine the pure flourocarbons (like CFC-14
- |> : which is pure perflouromethane) could be called into service ...
- <Stuff deleted>
- |>
- |> Um....CFC means 'Chlorinated Flourocarbon', so by definition they all have
- |> chlorine. Not all refrigerants, however, do.
- |>
- |> I read somewhere that SAAB has started shipping cars (about a year ago)
- |> with some other, non-nasty refrigerant in it, I beleive it has a designation
- |> of '114' or something....anyone else heard of this?
- |>
- |> --
- |>
- |> Dave Hinz - Opinions expressed are mine, not my employer's. Obviously.
- |> SAAB - you get what you pay for; you pay (and pay, and pay) for what you get.
- |> hinz@picard.med.ge.com
-
- Unfortunately, Freon 14 has very low boiling point, and its critical temperature
- is also pretty low (about 115 F), so it's practically impossible to use it in A/C
- (unless you're willing to make it 3 times heavier). Freon 114 is C2Cl2F4 - contains
- chlorine. Generally speaking, the meaning of digits in Freon names is the following:
- from right to left:
- number of F atoms
- number of H atoms plus 1
- number of C atoms minus 1 (often absent, i.e. 0 -> 1 atom of C)
- All the rest is chlorine. If there's anything else in the molecule, then the
- number of atoms is deignated by a digit after a letter designating the chemical
- element.
- Examples: 12 = CCl2F2; 21 = CHCl2F; 113 = C2Cl3F3; 114B2 = C2Br2F4.
-
- There are non-CFC substances usable in A/C, and they are even used in large
- industrial refrigerators. However, go figure what is better to have in a relatively
- leak-prone car A/C: notorious CFC's or ammonia or sulphur dioxide (two classic
- refrigerants!). The latter two are nasty AND stinky...
-
- --
- Tony Konashenok avk@hafnium.cchem.berkeley.edu (510)527-7524 (home)
- University of California, Berkeley (510)642-5831 (office)
-
- Strauss research group, Latimer Hall, UC Berkeley, Berkeley CA 94720, U.S.A.
-