Joseph,
If you wait around a propane-butane charged A/C system trying to caputure a
spectacular explosion on your OM-camera, you'll likely have a very long
wait!
Butane-propane is a viable alternative for freon in A/c systems, especially
mobile (i.e., automobiles). Propane is carried safely on board many camper
vehicles in quantities many several orders of magnitude greater than
required in an automobile A/C system.
Check this link for more details: http://www.aircondition.com/
Nicholas Smoliga
1103 Avenue B --- MS-1400
Arnold AFB, TN 37389-1400
(931) 454-6947
> -----Original Message-----
> From: Joseph [SMTP:joseph@xxxxxxxxxxx]
> Sent: Wednesday, January 12, 2000 6:17 AM
> To: olympus@xxxxxxxxxxxxxxx
> Subject: [OM] refrigerators
>
> =======
> Necissity is the mother of invention..
>
> PS, for you observant folks: the clinic's refridgerator, used ONLY for
> medicines, ran on propane, and the diesel generator was turned out only
> mid-day for cooling the clinic and at night for heating (temps can vary
> from 0 C at night to 50 C in the day).
> ========
>
> Back before freon was discovered, propane was commonly used as a
> refrigerant gas. Of course, this is very dangerous. The way
> refrigerators work is that when gases are compressed, they heat
> up, and when they expand, they cool down. For instance, a diesel
> engine works by compressing air until it reaches 1000F and then spraying
> atomized diesel fuel into the hot, compressed air. Heating air to 1000F
> is one thing, but compressing and thus heating up propane gas is another,
> more dangerous, matter.
>
> No less than Albert Einstein took the hand of necessity as the mother
> of invention here and invented three different types of refrigerators
> that used effects of magnetic fields to cool one area at the expense of
> heating up another. These should work well in practice and would be safe,
> so he decided to market them, and found a venture capitalist to back the
> idea.
>
> But Einstein was a much better theoretical physicist than businessman,
> and his refrigerators were highly unsuccessful in the marketplace, finally
> being killed off completely by the discovery of the inert refrigerant gas,
> freon, and other fluorocarbons.
>
> Of course, these gases rise to the stratosphere and bind free radicals of
> oxygen, blocking the regeneration of ozone that protects us from excessive
> UV radiation from the sun. Perhaps had Einstein's refrigerators been more
> successful, we wouldn't now have this problem as a replacement for
> explosive
> refrigerators.
>
> Joseph
>
>
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