Guest TangFX Posted June 6, 2006 Share Posted June 6, 2006 Hi !!I'm new on this board and I have many questions ! I search plans and information about low fog machines .How the smoke is cool in the low smoke CO2 machines ?I know pea soupers but not the machines with CO2 chillers , how does it works ?Someone have any diagram ? Other question is it possible to use liquid nitrogen instead of dry ice in a customized pea souper ? :) Thank you for your help !!! Link to comment Share on other sites More sharing options...
Tomo Posted June 6, 2006 Share Posted June 6, 2006 I know pea soupers but not the machines with CO2 chillers , how does it works ?The lumps of CO2 boil, the temperature of the water drops due to heat of evaporation.Ice crystals form, and spray out due to the large volume increase created by boiling the CO2 lumps. The 'low smoke' from CO2 low foggers is mostly made up of tiny water ice crystals.Obviously these melt and then evaporate quickly. Other question is it possible to use liquid nitrogen instead of dry ice in a customized pea souper ?Dear God NO!It's theoretically possible, but the temperature difference is huge and it would be very difficult to do safely. However, frozen CO2 is EXTREMELY cold - so cold that it will burn you - so you have to take extreme care when using and handling both the solid CO2 and the CO2 fogger. Link to comment Share on other sites More sharing options...
Ben... Posted June 8, 2006 Share Posted June 8, 2006 Other question is it possible to use liquid nitrogen instead of dry ice in a customized pea souper ? No; pea soupers are designed to work with solid CO2, Nitrogen doesn't sublime at standard pressures, and there would be serious safety hazards if you modified a pea-souper to hold liquid Nitrogen. Firstly, your body detects when you're suffocating based on CO2 concentration in your blood; if you displaced the oxygen in the room with excess Nitrogen, the first you'd notice would be when you became light headed and blacked out. Futhermore, there are higher risks involved with cryogenic liquids, and it'd be significantly more difficult to control the rate of gas production (and hence oxygen level.) So, in short, don't do it. Ben (ps: pedantic nitpick; Dry Ice doesn't boil; it sublimes) Link to comment Share on other sites More sharing options...
Jivemaster Posted June 10, 2006 Share Posted June 10, 2006 Many effects challenge conventional ideas of safety, or appear to! The key to risk and hazard minimisation is to use appropriate manufacturers equipment with due regard for its intended purpose and instructions for operation. Link to comment Share on other sites More sharing options...
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