[TheForge] Refrigerator compressor/motors

[Jerry Smith]

         HF sells a propane tank filling kit.

At 10:30 PM 11/4/2004, you wrote:
>I saw a guy transferring liquid propane between pressure bottles by 
>connecting them with a common tube. He turned the full bottle upside down 
>and opened the valves as well as the pressure bleed on the empty 
>valve.Then shut it down when liquid started showing in the bleed stream. 
>This oughta work till you hit the overfill tube on the full bottle.
>Needless to say, a reasonable person wouldn't admit to having done this...
>
>GHS wrote:
>
>>
>>
>>Dave Brown wrote:
>>
>>>
>>>Why?  Or should I ask how?
>>
>>
>>  No heat,
>>Other than the motor and the ever present possibility of spark 
>>generation. Ever lay your hand on a compressor that was not being cooled 
>>by a flood of refrigerant?
>>
>>  no oxygen,
>>I am assuming this would not be a permanent rig. As you would be 
>>connecting and reconnecting this, and it would not as a whole be 
>>permanently flooded, I would not be so sure about no oxygen.
>>
>>  propane will liquefy
>>
>>>under pressure, compressor is already designed for compressing a gas 
>>>(freon) to liquid state at pressures comparable to propane.
>>
>>
>>Propane was once used in this country as a refrigerant. Still is in some 
>>places. I believe it was belt driven compressors, no windings in the gas flow.
>>
>>Ammonia was used also.
>>
>>The problems with these were LP could explode and pure ammonia kills you 
>>outright.
>>
>>The Freon type refrigerants were designed around finding a non explosive 
>>(essentially non flammable) non poisonous substitute. Keep in mind that 
>>given sufficient heat you can burn Freon into phosphoric acid and 
>>phosgene. This the reason that being careful with the gases and oils from 
>>a burnt out compressor is a GOOD idea. Freon also will not support life 
>>if there are sufficient quantities.
>>
>>Even with that it is still much safer given the original concerns.
>>
>>While IN THEORY you are correct. Positing a totally oxygen free 
>>environment and a perfectly running compressor, you probably could get it 
>>to work , it is the wrong compressor for the job.
>>
>>I have not had an opportunity to check the pressure temperature curves 
>>for LP but at normal atmospheric temps you might have a problem 
>>generating sufficient pressure to liquefy the LP.
>>
>>>I'm not trying to be a smartass, Mike.  I was just looking for answers 
>>>longer than one word or that had a positive bent to them.
>>
>>
>>Dave not blowing you into little pieces and launching your shop into the 
>>bay IS a positive bent , from my perspective.
>>
>>>Dave Brown
>>>Heritage Smithing
>>>Green Bay, WI
>>>
>>>_______________________________________________
>>>Manage membership or unsubscribe at:
>>>http://mailman.qth.net/mailman/listinfo/theforge
>>>theforge mail list group photo site is
>>>http://www.photoaccess.com
>>>Login:  blacksmithblacksmith at hotmail.com
>>>password:  anvil
>>>___________
>>>
>>>
>>>
>>>
>>>
>>>_____________________________________________________
>>>This message scanned for viruses by CoreComm
>>>
>
>
>_______________________________________________
>Manage membership or unsubscribe at:
>http://mailman.qth.net/mailman/listinfo/theforge
>theforge mail list group photo site is
>http://www.photoaccess.com
>Login:  blacksmithblacksmith at hotmail.com
>password:  anvil
>___________
>
>