Very good. As you can tell I haven't studies the science at all. I do know
how to work with it, have run countless lines and tanks, installed regulators
on the backs of stoves to convert from natural gas. But when it comes to what
happens when the gas gets lose, I've just learned what not to do...
----- Original Message -----
From: chiliblindman
To: blindhandyman@yahoogroups.com
Sent: Friday, January 15, 2010 7:39 AM
Subject: [BlindHandyMan] propane
Bob, propane does not frost when exposed to oxygen. It is a simple property
of heat transfer. Anytime you have a liquid under pressure and release it to a
lower pressure area, the liquid will vaporize and absorb heat causing a very
cold spot. The frost is liquid propane frozen and water vapor frozen that was
in the air around the pressure drop area. They use this property to make
man-made snow at ski resorts. Water is pressurized to somewhere around 56 psi
and sprayed with a certain orfice opening. The resulting pressure drop chills
the water vapor coming out to below 0 degrees F forming snow. The temperature
does need to be below freezing in order to keep it in state.
.............bob
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