How to keep a CO2 cartridge from freezing up
How to keep a CO2 cartridge from freezing up
(OP)
How do I keep a 12g CO2 cartridge (like the ones used in BB guns)from freezing up (forming dry ice) when I puncture it?
I need to be able to expel the gas over a time period of 10 to 20 seconds.
I am sure the experts here will want more information but as this is a subject matter I don't have much experience in I am not sure what information to supply.
Any help is greatly appreciated.
I need to be able to expel the gas over a time period of 10 to 20 seconds.
I am sure the experts here will want more information but as this is a subject matter I don't have much experience in I am not sure what information to supply.
Any help is greatly appreciated.





RE: How to keep a CO2 cartridge from freezing up
Good luck,
Latexman
To a ChE, the glass is always full - 1/2 air and 1/2 water.
RE: How to keep a CO2 cartridge from freezing up
As I understand it, if i assume the worst case then the CO2 will be super critical (all vapor) but when I puncture the cylinder the cooling effect is so strong that the temperature is dropping faster than the pressure is.
RE: How to keep a CO2 cartridge from freezing up
RE: How to keep a CO2 cartridge from freezing up
That is an interesting idea I had not considered. I did wonder if orientation would make a difference but hadn't considered that being a good thing.
I am going to go try it now.
Is this throttling the saturated liquid? What does this do other than get more mass out of the cartridge faster?
RE: How to keep a CO2 cartridge from freezing up
RE: How to keep a CO2 cartridge from freezing up
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P.E. Metallurgy, Plymouth Tube
RE: How to keep a CO2 cartridge from freezing up
My system doesn't really have an expansion "valve", it just expands into a larger volume container where is it used to push extinguishing agent out.
If the CO2 is still liquid after exiting the capillary tube would it not just convert to a gas due to being at a lower pressure? I am trying not to ask the question because I should probably already know...... but why does the CO2 need to be fully vaporized before reaching any expansion valve?
RE: How to keep a CO2 cartridge from freezing up
RE: How to keep a CO2 cartridge from freezing up
RE: How to keep a CO2 cartridge from freezing up