[TheForge] Propane vs LPG

[Peter Fels & Phoebe Palmer]

Hi Bruce:
Thanks for the finishing link.
Well, i've used the warm ( say, body temperature) tub of 
water approach when running a forge, to keep the bottle 
from freezing. The tub full drops below ambient pretty 
promptly.
But the prior discussion was about running bottles of gas 
in sub freezing temperatures..so that ambient temperature 
would leave the pressure bottle atop the ice.
The problem with my suggestion is that you need the gas 
to warm the tub to get the gas unfrozen so you can warm 
the tub....
Bruce Freeman wrote:
> I recommend using a tub of "cold" (i.e., ambient temperature) water.
> What you need is heat, not (higher) temperature.  Cold water supplies
> enough heat to the propane to promote vaporization.  "Warm" water just
> adds risk.  This is directly analogous to heating a house in winter
> using a heat pump that is warmed by the "cold" outdoor air.
> 
> On Fri, Apr 9, 2010 at 6:32 PM, Peter Fels & Phoebe Palmer
> <artgawk at thegrid.net> wrote:
>> When bottles freeze, i plunk them in a tub of warm water.
>> Not always available.
>> I'm imagining a secondary engine cooling circuit that
>> warms your gas bottle.
>>
> 
> 
>