Re: Older tow vehicle R12 to R134 conversion

Lon VanOstran wrote:
David M. wrote:

1. each molecule of R12 creates 100,000 molecules of ozone in the upper atmosphere.

2. there is a $25,000 fine to dump R12 into the atmosphere.

3. if I turn you in, I get that $25,000.

David M.


If the above nonsense were true, it would merely point out the stupidity of the average bureaucrat.

Maybe we can get rid of the ozone hole if we release, all at once, all of the R12 we can create or recapture. LOL

Lon

FYI from http://www.albany.edu/faculty/rgk/atm101/ozone.htm

Ozone is constantly being produced and destroyed in a natural cycle. However, the overall amount of ozone is essentially stable. This balance can be thought of as a tub with a tap and a drain. As long as the tap adds water as fast as the drain removes water, the water level in the tub remains constant. Similarly, while ozone production and destruction are balanced, ozone levels remain stable. This was the situation until the past several decades.

Large increases in stratospheric chlorine and bromine have upset that balance. In effect, they have added another drain to the tub, removing ozone faster than natural ozone is created. Therefore, ozone levels are beginning to fall towards a lower level until a new balance can be achieved; analogous to the tub in which water drains out more slowly as the water level goes down and eventually the tap again adds water at the same rate that water drains out but now the water level is lower.

The ozone depletion process begins when CFC's and other ozone-depleting substances (ODS) leak or are released from equipment. Winds efficiently mix the troposphere and evenly distribute the gases. CFC's are extremely stable, and they do not dissolve in rain. After a period of a few years, ODS molecules reach the stratosphere. Strong UV light breaks apart the ODS molecule. CFC's release chlorine atoms and halons release bromine atoms. It is these atoms that actually destroy ozone, not the intact ODS molecule. It is estimated that one chlorine atom can destroy over 100,000 ozone molecules before finally being removed from the stratosphere.

Chlorofluorocarbons (CFC's) are a class of compounds that have been used as refrigerants (the fluid used in compressors for air conditioners and refrigerators), aerosol propellants (for spray cans), foam blowing agents (for manufacture of styrofoam and insulation), and as solvents (for cleaning in the electronics industry). They are chemically very unreactive, and hence safe to work with. The CFC's have lifetimes of 50-200+ years in the atmosphere and their major "sink" is photolysis by UV radiation. CFC's were invented in 1928, but only came into large-scale production after 1950.

The most important CFC's for ozone depletion are:
Trichlorofluoromethane, CFCl3 (usually called CFC-11 or R-11)
Dichlorodifluoromethane, CF2Cl2 (CFC-12 or R-12) and
1,1,2 Trichlorotrifluoroethane, CF2ClCFCl2 (CFC-113 or R-113)

chuck b:-)
.

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