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Wendell, There is a very rare russian Scuba working with 2 dewars, one of lox, one of ( not sure ) nitrogen/ nitrox/ air. Self mixing, based on evaporation temperature and partial pressure. Rare unit. Pic are on a webpage somewhere. This is now in Brandenburg, Germany. For patients needing longtime high flow oxygen it is standard to use liquid oxygen. The concentrators sometimes have a compliance problem with patients because of their noise. These could perhaps be used for ambient pressure mixing into a bag, before filling it into tanks via a oxygen tolerant compressor. Some normal compressors may be used up to 40 % oxygen, but I do not make a statement on any other tbrand I am not familiar with. Anyway, at 60% oxygen, the charcoal filters will explode . Warning! Do NOT collect this to fill it as pure oxygen, calling for desaster !!! . It is useless to use a Haskel or similar transfer pump because this is ambient pressure. just my 2cc. Matthias Wendell Grogan schrieb: > > OK guys, new topic. > I was talking to some pulmonary people today and ran into a couple of > interesting topics. > First, liquid oxygen. A tank of liquid O2, which wouldn't take up more > room than a pair of doubles, can carry something like 34,000 liters of > oxygen. This is enough to supply 15l per minute for 7 hours. Question, > does anyone know if this could be applied to practical use on a dive > boat- i.e.. emergency oxygen for deco symptoms, or use as a source of > oxygen for mixing on a multi day dive? > Second, there are "oxygen concentrators" that can be used to fill oxygen > bottles. The machines can deliver about 95% pure O2, at 2000psi at a > rate that would fill a deco bottle in about 6 hours. This might be > useful for just plugging in at home, filling you O2 tanks during the > week, and then going diving over the weekend. The only down side I can > see is that the units use about 800watts per hour. Not a huge amount of > electricity, but still not inconsequential. > Wendell G > -- > 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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