[TheForge] Refrigerator compressor/motors

[Darrell]

Scratching my head on this one. Getting a tank cold could cause an
explosion???? Better bring my tanks inside.
If the tanks are connected together with a hose and the valves are opened
there are no leaks assuming the hose is good.
Speed of transfer is dependant on temperature difference. Left to nature,
the tank on the outside of the freezer will get cold from the propane
boiling off and the process will slow down unless there is a fan or some
other source of heat to keep things going. Just like what happens when you
are running your forge.
Trust me, it works. If your freezer is at minus 20 degrees it will transfer
almost as fast as the room tank would empty through the hose venting to air.
Darrell

http://www.machinemaster.com
----- Original Message ----- 
From: "Bruce Freeman" <FREEMAB at pt.fdah.com>
To: <theforge at mailman.qth.net>
Sent: Friday, November 05, 2004 6:10 AM
Subject: Re: [TheForge] Refrigerator compressor/motors


> Darrell,
> Clever, but have you tried this?  Works in theory, but may not be
> speedy in practice.
> Also, I'd be concerned about placing a propane cylinder in a
> non-explosion-proff freezer.  Could be dangerous.
> Bruce
> NJ
>
> >>> darrell at machinemaster.com 11/4/2004 8:55:01 PM >>>
> You can recover all of the propane using nothing more than a hose
> connected
> between the two cylinders. All you have to do is put one of the
> cylinders in
> a freezer and leave the other one at room temp.
> Darrell
>
> http://www.machinemaster.com
> ----- Original Message ----- 
> From: "Steve Smith" <sos at alum.mit.edu>
> To: "Sponsored by ABANA" <theforge at mailman.qth.net>
> Sent: Thursday, November 04, 2004 4:43 PM
> Subject: Re: [TheForge] Refrigerator compressor/motors
>
>
> >
> >
> > Dave Brown wrote:
> >
> >
> > > I also have the opportunity to empty propane cylinders from 20#ers
> and
> > > up.  Would these compressors be suitable for sucking the propane
> out of
> > > one tank and into another?  The person I can get the tanks from is
> just
> > > burning off the gas in them and then removing the valves for the
> brass
> > > to scrap out.
> > >
> > > Dave Brown
> > > Heritage Smithing
> > > Green Bay, WI
> >
> > This sounds like a real bad idea to me.
> > 1. The compressor isn't made to be safe with propane, which makes
> this
> > seem like a very high risk.
> > 2. What do you know about refilling propane tanks? It seems simple
> > enough, but is it really worth the possible danger? Fuel gas
> explosions
> > are pretty serious.
> >
> > Steve
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