[TheForge] Propane vs LPG

[Peter Fels & Phoebe Palmer]

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.

Matt Stevens wrote:
>> I had a heater in my camper that I used for deer hunting that quit 
>> working. After I swapped out the tank and felt liquid sloshing inside I 
>> figgered out that it was not propane. I worked just fine in the summer 
>> for the gas grill.
>> Propane company said that was B/S... we don't sell butane... lets see... 
>> sloshes around like a liquid when its 10 degrees below zero and I got no 
>> heat... burns just great in the gas grill when it's 70 degrees outside. 
>> You decide.
> 
> Those sound like symptoms of a propane/butane blend. On a caravanning 
> website I found, it described similar. They were describing propane 
> being burnt off at cold temps, leaving the butane. On refilling, the 
> remaining butane gets mixed in with the refill giving an even lower 
> Propane/Butane mix and a higher propensity to repeat and 'run out' 
> faster - in cold temperatures. I guess taken to extremes you could end 
> up with a tank full of butane and be unable to squeeze any more propane 
> in...
> 
> The article also suggested Propane/Butane mixes were highly variable in 
> different places, in part to compensate for expected temperatures.
> 
> The 'fix' is to empty the tank of butane before refilling. Not sure what 
> that would do to our greenhouse gasses!
> 
> Thanks for the links :-)
> 
> Cheers
> Matt
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