| Pages:
1
2 |
MagicJigPipe
International Hazard
Posts: 1554
Registered: 19-9-2007
Location: USA
Member Is Offline
Mood: Suspicious
|
|
I have noticed that the only problem with vehicle A/C units is the compressor. It is run by the same belt in the motor that turns the alternator etc.
Basically, to use it you would have to have an electric motor with a belt. Also, they use a magnetic clutch to (de)activate. That is so it's not
always running whenever the engine is in use.
It would take up a lot of room to set it up but would be interesting...
"There must be no barriers to freedom of inquiry ... There is no place for dogma in science. The scientist is free, and must be free to ask any
question, to doubt any assertion, to seek for any evidence, to correct any errors. ... We know that the only way to avoid error is to detect it and
that the only way to detect it is to be free to inquire. And we know that as long as men are free to ask what they must, free to say what they think,
free to think what they will, freedom can never be lost, and science can never regress." -J. Robert Oppenheimer
|
|
|
Mr. Wizard
International Hazard
Posts: 1042
Registered: 30-3-2003
Member Is Offline
Mood: No Mood
|
|
Here is a guy that made a quick and dirty refrigeration unit using propane.
http://home.earthlink.net/~lenyr/refrig.htm
He then went on to modify a refrigerator using propane. Lots of pictures and practical information.
http://home.earthlink.net/~lenyr/refrig2.htm
|
|
|
F2Chemist
Harmless
Posts: 28
Registered: 30-6-2008
Member Is Offline
Mood: No Mood
|
|
Although it doesn't have even CLOSE to the refrigeration power as a common recirculator, an inexpensive option one could use for something as simple
as a cold condenser finger is this:
http://www.premiumaquatics.com/Merchant2/merchant.mvc?Screen...
Also, keep an eye out in the aquarium section of your local classifieds...you can sometimes pick up an inexpensive probe or recirculating chiller used
for aquariums. These are anywhere from 1/10 hp to 1 hp models.
[Edited on 11-7-2008 by F2Chemist]
|
|
|
peach
Bon Vivant
Posts: 1428
Registered: 14-11-2008
Member Is Offline
Mood: No Mood
|
|
I have an even more basic suggestion.
Go to the local dump and salvage a freezer. Remove all the drawers and compartments.
Install into said freezer a large bin that uses up as much room as possible. Fill the bin with water and some anti-freeze.
Drop a recirculating pump into the bin. Drill two holes in the freezer and connect your in/out lines to the pump.
If my memory is working right, a normal household freezer can manage up to -18C.
The compressor won't be able to keep up with solvents that have a high latent heat capacity, but the huge thermal mass of the water in the bin will
mean the temperature won't change all that much during an at home scale distillation.
You could even improve the thermal mass of this idea further still. Drop a bunch of sealed ice packs into the bin first, or even 2l coke bottle full
of tap water would do. Add enough water for your pump to function. The change of state occurring as either of these two melts will soak up huge
amounts of energy before the bin starts to warm up - and forms a mirror image of the state change occurring in the condenser.
It should also form a nice contained system that doesn't need reboxing to stop it getting broken when it takes a knock. It'll take zero intelligence
or effort to put it together and be virtually free.
And now you have somewhere to stick all your stir bars.
Branded recirculating chillers are ridiculously expensive, yep.
[Edited on 1-5-2010 by peach]
|
|
|
Texium
|
Thread Moved
19-11-2023 at 15:13 |
| Pages:
1
2 |
![[*]](images/xpblue/default_icon.gif){kind=icon}
