I would think that the contribution to the greenhouse effect of these gases
is fairly insignificant when stacked against say, carbon dioxide simply
because of the massive amounts of CO2 we put into the atmosphere...?
comments?
Andy
>From: Ron Soave <soavero@yahoo.com>
>To: Andy Webster <trunkie@hotmail.com>, spridgets@autox.team.net
>Subject: Re: Cool LBC
>Date: Sat, 21 Aug 1999 10:36:20 -0700 (PDT)
>
> It was banned for being a Class 1 ODC - ozone
>depleting chemical. R-12's ODP (ozone depleting
>potential) is 1.0 . R-134a's is, you guessed it,
>0.0. Class 2 ODC's like R-22 have ODP's of around
>.02. BUT the GWP (Global warming potential ) is
>different, and currently refrigerants aren't banned
>for high GWP, but that is the next regulation on the
>horizon. As far as the chemistry goes, it is a free
>chlorine molecule that breaks off the fluorocarbon
>under the presence of ultraviolet light. The chlorine
>doesn't like being monatomic, and does an oxygen
>attracting mating dance, ultimately getting an oxygen
>molecule from the O3 ozone. This Has NEVER been
>duplicated in a laboratory. The Japanese claimed
>they did, but it was bad data.
>
>Ron
>
>
>--- Andy Webster <trunkie@hotmail.com> wrote:
> > I thought the problem with refrigerant was not so
> > much a greenhouse one but
> > an ozone one.
> > I remember hearing in an environmental chemistry
> > lecture that one molecule
> > of CFC such as R12 destroys around 10,000 ozone
> > molecules in its long
> > lifetime in the upper atmosphere.Can't remember
> > whether it was a free
> > radical reaction or what...
> > Andy
> >
> >
> > >From: Ron Soave <soavero@yahoo.com>
> > >To: RBHouston@aol.com, toyman@htcomp.net
> > >CC: trunkie@hotmail.com, spritenut@Exit109.com,
> > spridgets@autox.team.net
> > >Subject: Re: Cool LBC
> > >Date: Fri, 20 Aug 1999 19:53:46 -0700 (PDT)
> > >
> > >
> > > > An HVAC guy also told me the new stuff now is
> > > > suspect.
> > >
> > >Yeah, now they're screaming that R-134a is a
> > >greenhouse gas, even though its GWP (Global Warming
> > >Potential) was originally said to be an order of
> > >magnitude lower than anything ever made.
> > >
> > >Regarding DuPonts motivation, it was no doubt
> > >financial, but R-12 was being produced cheaply by
> > >AlliedSignal as Genetron 12 and someone else (Dow?)
> > as
> > >Dynamatron 12. Don't know about the patent thing.
> > >Might be true.
> > >
> > >
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> >
> >
> >
>
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