Low Fog Technology

LPdan

Well-Known Member
Joined
Apr 18, 2015
Location
NY
I've been thinking about the various ways to make low fog, and was wondering if it would work to use liquid CO2 into hot water. Through research I found that there are some machines that use liquid Nitrogen, but I'm not sure why. Liquid CO2 stores better and is more controllable than dry ice. It seems like the reaction in hot water would be the same. What would the advantage be to Nitrogen? Any ideas on this technology?
 

LPdan

Well-Known Member
Joined
Apr 18, 2015
Location
NY
I know various machines use CO2 as a chilling mechanism, but I'm talking about letting it convert to a gas the way dry ice does. Basically pipe it into a hot water tank.
 

macsound

Well-Known Member
Joined
Jun 15, 2018
Location
San Francisco, CA
There's a few reasons why theatrically we use nitrogen instead of carbon dioxide
CO2 needs to be vented. People will pass out with a much lower percentage of CO2 than LN2.
CO2 will form dry ice, which is ok if that's the purpose, but usually you just want the effect with no byproduct
CO2 is "warmer" so even if it's cheaper per pound, you'll need almost twice as much of it to make the same effect.
CO2 is far more pressurized so it's more dangerous to store
CO2 is made at an oil refinery using ammonia and other natural gas components, LN2 is made by separating from the air.