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okay greg, watch closely. i take a fixed amount of air and add one molecule of helium - thermal conductivity goes up. i add a gram-mole of helium - thermal conductivity goes up. i add a pound of helium - thermal conductivity goes up. it does not matter how much. the thermal conductivity goes up. i guess everybody still appears 10 feet tall to you. let me know when you come back down. the final absolute value of the thermal conductivity of the mix is irrelavent. it went up no matter what. i am curious as to your education level because this very simple concept is obviously falling on deaf ears. >From: gzambeck1 <gzambeck1@me*.ne*> >To: Scott Landon <js_landon@ho*.co*> >CC: techdiver@aquanaut.com, trey@ne*.co* >Subject: Re: argon for the cerebrally challenged >Date: Tue, 11 Jul 2000 19:50:11 -0400 > >Yes you do need to solve for weight and volume Scott. You mix by volume >Helium >is 97.08 cf./lb. air is 13.45 cf./lb. Helium has roughly 5 times the heat >capacity but is over 7 times the volume for the same weight. Joel is >correct in >his statement about trimix breathing mixtures. But an insulating gas has >to be >evaluated based on the moisture in the divers suit. > >Tell Trey I have talked to DuPont chemist also try a handbook on chemistry. > >Greg Z. > >Scott Landon wrote: > > > okay, obviously i need to add units for the FAS ones. > > > > cal > > units = ------------------- x 10^(-6) > > (sec)(cm^2)(C/cm) > > > > this is so simple. it does not matter how many pounds of helium are in >your > > tanks. it is all relative. you can look at this quantitatively or > > qualitatively. you still get a higher thermal conductivity. more >helium in > > your mix at a higher thermal conductivity than air means a higher >overall > > thermal conductivity for the mixture. we don't need to solve this to 6 > > significant digits to known the trend. argon is denser than air and >much > > denser than helium. > > > > zambeck, stop chasing rabbits and call us back when everyone does not >appear > > ten feet tall. > > > > >From: gzambeck1 <gzambeck1@me*.ne*> > > >To: Scott Landon <js_landon@ho*.co*> > > >CC: techdiver@aquanaut.com, trey@ne*.co* > > >Subject: Re: argon for the cerebrally challenged > > >Date: Tue, 11 Jul 2000 13:02:10 -0400 > > > > > >Scott you have to make the evaluation based on the weight of each gas >in a > > >mixture to evaluate the heat retained per wt of the gas in the mixture. > > > > > >Greg Z. > > > > > >Scott Landon wrote: > > > > > > > here it is clowns. > > > > > > > > thermal conductivity data at 60F (15.6C) > > > > > > > > helium : 352.10 > > > > argon : 41.33 > > > > air : 60.34 > > > > > > > > i could post the units, but it is meaningless for this discussion. > > > > > > > > oxygen is slightly higher than nitrogen, so nitrox will make you >colder > > >than > > > > air. is there anything else you dilettantes need, or are you just >being > > > > polemic because you never get a chance to do real dives? > > > > >________________________________________________________________________ > > > > Get Your Private, Free E-mail from MSN Hotmail at >http://www.hotmail.com > > > > > > > > -- > > > > Send mail for the `techdiver' mailing list to >`techdiver@aquanaut.com'. > > > > Send subscribe/unsubscribe requests to >`techdiver-request@aquanaut.com'. > > > > > > > ________________________________________________________________________ > > Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com > ________________________________________________________________________ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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