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>I have access to "the CRC handbook" for chemical engineers & looked up a table >showing various conductive values for gasses. This table shows that, at room >temperature, argon gas will conduct 41cal/sec, air conducts about 60cal/sec, >and carbon dioxide gas conducts 35cal/sec (the lower the value - thebetter the >insulator). Has anyone tried CO2 gas to fill a suit? This seems to be a >much more economical solution to keeping warm... I'd imagine the problem would be making sure you are using only the gas. CO2 bottles at typical fill pressures contain mostly liquid CO2, with gas existing only in the headspace of the bottle. With a stationary bottle, one can position the dip tube to draw off either liquid CO2 from the bottom of the bottle, or gas from the top. In a diving application, you can't count on the bottle staying oriented correctly relative to the dip tube. For example, if you set the tank up to work properly when you are in an upright position, you would probably find yourself filling your suit with liquid CO2 if you hit the inflator while inverted. Liquid CO2 flashing to gaseous CO2 in close proximity to your skin would not provide the warming effect you desire :-) Gary ************************************************************************** Gary Meier, Ph.D. Senior Research Computational Chemist FMC Corporation Agricultural Products Group phone: (609) 951-3448 Box 8 fax: (609) 951-3835 Princeton, NJ 08543 email: gameier@fm*.co* -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send list subscription requests to `techdiver-request@aquanaut.com'.
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