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watson.fawkes
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There is some brief information on CO2 nozzles available in this post; no pictures unfortunately.
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peach
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Thank you very much. Looks like Sauron may be able to help, if I can ever contact him, as he appears to have disappeared for the last few months.
Alternatively, I'll copy his nozzle, see how it works, then try the perforated plate if not.
It's interesting that he says;
| Quote: | | The important thing is that the dry ice come out only when you need it (JIT) and in slurriable form rather than in big blocks.
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Indicating his own nozzle may be producing it thusly, or I have a suspicion he'd have mentioned it given him mentioning the form earlier on.
The mention of a 1/8" hole I think, at these large pressures, is likely acting as a spray forming orifice, like you'd see at the end of a swagged
copper or brass welding or brazing tip; the bit that clogs when you fuck up and results in the popping and banging. It'll also be similar to the tip
of a spray gun. In the welding example, the hole is relatively large but it's only supporting a flame. For the atomization in a spraygun, it's small
and the pressure is "high" (~100psi, unless you're a hippy and using the inferior HV guns). The same single point is also used for misters and
foggers, with tiny diameters and "high" pressures. For the CO2 tank, the pressure is huge by comparison (so the hole can be wider), and the desired
flow rate is as well. Meaning the 1/8th hole could be forming the fan of CO2. If you think about it, why would he bother with the blanked fitting in
the first place if it wasn't? He's obviously trying to show how cheap and easily it can be done, so it wouldn't make sense to include it if there was
no logic behind it.
I did a UTFSE prior to posting, but didn't get that post, because I made the heinous error of not selecting 'topics only'.
Right, I'll disappear for a while and hopefully reappear with some photos.
John
[Edited on 8-8-2010 by peach]
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Nicodem
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You don't need any perforated plates or whatever. Essentially it is just a tube with a few mm large hole prolonged into a cone where you attach the
cloth bag to collect the dry ice. At least that is how the one I use look like. The dry ice forms from expansion of the liquid CO2 so I don't really
see what role a perforated plate is supposed to have. All you need to pay attention is the vertical red arrow sign on the bomb. If there is one then
the bomb has a vertical inner tube and you must not invert it in order to draw out CO2 in liquid form. If there is no arrow you need to invert it
which means you need a special stand for safe use.
…there is a human touch of the cultist “believer” in every theorist that he must struggle against as being
unworthy of the scientist. Some of the greatest men of science have publicly repudiated a theory which earlier they hotly defended. In this lies their
scientific temper, not in the scientific defense of the theory. - Weston La Barre (Ghost Dance, 1972)
Read the The ScienceMadness Guidelines!
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peach
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Quote: Originally posted by Nicodem  | | You don't need any perforated plates or whatever. Essentially it is just a tube with a few mm large hole prolonged into a cone where you attach the
cloth bag to collect the dry ice. At least that is how the one I use look like. The dry ice forms from expansion of the liquid CO2 so I don't really
see what role a perforated plate is supposed to have. All you need to pay attention is the vertical red arrow sign on the bomb. If there is one then
the bomb has a vertical inner tube and you must not invert it in order to draw out CO2 in liquid form. If there is no arrow you need to invert it
which means you need a special stand for safe use. |
Thanks Nicodem, this seems pretty easy now I have two references for the actual nozzles themselves. I'll see if I can pick the bits up next week. I
may only need a blank.
In the UK, the syphon / stinger tanks have a solid white line down the side, for anyone in the UK who's wondering when they see one. BOC refer to them
as 'dip tube' cylinders. The one on the left is such;
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peach
Bon Vivant
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| Quote: Originally posted by chief | Who really desperately needs it could try
==> to connect 2 refrigerator-compressors in series ...
==> and compress some CO2 into a reservoir within a deep-cooling fridge ...
At the -20 [Cels] that such a fridge can do (-35 with disabled temperature-regulation)
==> the liquefieing-pressure of the CO2 could be in range for the 2 fridge-compressors (in series) ...
So the CO2 could come from some burning of anything or wherefrom ever ...
==> Only that the N2 from the air might disturb the efficiency ... |
CHIEF, YOU AND YOUR IDEA GET A MENTION IN THE VIDEOS IN THIS THREAD
[Edited on 6-9-2010 by peach]
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