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Mike, You are correct that the ambient pressure at depth will result in the same volume flow as at the surface. The tricky part is that since the gas is at about twice the pressure, it is twice as dense, and so you lose twice as much gas in the same amount of time for the same volume flow rate. Does this make sense? Don W. Mike Gault wrote: > > "Don W." <donw_s11@sw*.ne*> wrote: > John, > > >For example if you are at 330 ft (~100M), the pressure increase from the > >surface was 147PSI (10 bar) and the intermediate pressure in your hose > >is about 150+147 = 297 PSI or roughly double. At this depth, you would > >lose gas to a freeflow approximately twice as fast as at the surface. > >By contrast, your rate of consumption of gas due to breathing on open > >circuit is 11x higher than at the surface. > > Would the ambient pressure not counteract the flow? Leaving the flow > essentially the same as at the surface (any other variables affecting flow > held constant). > > ____________________________________________________________________ > Get your own FREE, personal Netscape WebMail account today at http://webmail.netscape.com. > -- > Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. > Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.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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