El_Kod
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What part should i try to remove and keep from a refrigerator that i found in the street?
i think the topic says it all....
i can't find the company that made it, but my bet is that it's about 5 years old max, not those from 1900.
i want the freezer cooler to make liquid O2 and liquid N2 
thanks for the help. (in advanced..)
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Twospoons
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The entire refrigeration circuit - thats the compressor, JT valve, evaporator, condensor and all the plumbing.
Helicopter: "helico" -> spiral, "pter" -> with wings
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The_Davster
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Yeah, definatly do what Twospoons suggested. Start with the big compressor at the bottom and remove all tubing, electronics, etc that is attached to
it. Just leave a big insulated box.
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El_Kod
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thanks guys
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bullstrode
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There is some info on refrigeration compressors here:
http://www.belljar.net/refrig.htm
http://www.sas.org/E-Bulletin/2003-12-12/labNotesAS/index.ht...
There is also an article on liquifying gases using a compressor on the Amateur Scientist CD released by the Tinkerer's Guild. You might be able to get
it through this very slow link (unless you get it directly through I2P):
http://sasquotch.i2p.tin0.de/archive/AmSci01/1969/11/1969-11...
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watson.fawkes
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Playing with a refrigeration circuit is definitely a good learning experience, but don't expect to get to
liquid air temperatures; they just don't go that cold.
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gsd
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@watson.fawkes
I think that was a tongue-in-cheek comment (a flagged one at that).
It looks like El_Kod is well aware of the fact that working fluids of household refrigerators have solidification points way above the liquification
temperature of air.
gsd
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Contrabasso
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Air is liquified by the expansion of compressed AIR after the removal of the CO2 content and the water content.
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peach
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[Topic merge this into the loooooooong fridge pump post?]
Quote: Originally posted by watson.fawkes  | | Playing with a refrigeration circuit is definitely a good learning experience, but don't expect to get to
liquid air temperatures; they just don't go that cold. |
Well the freezer as is can't, but the process of liquefying air relies on compression and cooling.
You could squash CO2 enough with the compressor from a fridge and cool it enough in another freezer to drop it below it's critical temperature and
turn into liquid CO2; just... I think.
The liquid CO2 will cool through expansion enough to then potentially liquefy N2 provided it's also compressed.
I began wondering about this after chief mentioned it a long time ago. I recall some fun being poked at him because you'd need a cylinder of CO2 or a
fire as the source to begin with. But, standing out in the garage, I then realised I already have a continually burning, very efficient CO2 producing,
fire in the house already. The combi boiler.
That is a huge amount of effort compared to simply grabbing a tank and a nozzle. And it is far from a safe. But, it does appear to be possible based
on the critical temperatures and pressures the pumps can manage.
The gas need not actually liquefy in the pumps, it only needs compressing before hand if the output isn't going to recirculate.
I think that's what they're doing in this video. But I haven't tried any of this (beyond checking the pump pressures), I can't speak
German and there aren't many details to begin with, other than it involving five cascade stages.
<iframe sandbox title="YouTube video player" width="480" height="390" src="http://www.youtube.com/embed/GHDZt1r4Ap8" frameborder="0"
allowfullscreen></iframe>
[Edited on 18-2-2011 by peach]
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