Michel Jullian wrote: > > Nice! How much does a used unit cost roughly Fred, and what's the valving > system and the "pressure swing" for? > You can shop on the web for "Oxygen Concentrators".that go from $450.00 and up, but a medical oxygen supplier might let you have an oldie for a few bars of "I Love Paris" or The Bonaoparte's Retreat:
Met the girl that I love, In a town way down in Texas. 'Neath the stars up above, She was the sweetest girl I ever did see. So I held her in my arms and, Told her of her many charms, An'; I kissed her while the fiddles played, The Bonaparte's Retreat. All the world was bright as I held her on that night, And I heard her say: "Don't you ever go away." So I held her in my arms and, Told her of her many charms, An' I kissed her while the guitars played, The Bonaparte's Retreat. By the time you get to the last stanza, they will give it to you in order to get rid of you. :-) The compressor pressure pushes air into one can of molecualar sieve (a cheap clay product) and holds it momentarilly. Then you valve that off so that the O2 comes out while you pressurized the other, and so on. > >If it is just a sieve letting smaller > molecules through as they describe a simple bleeding of the O2-depleted air > should work shouldn't it? (that's the way reverse osmosis systems work) > You can buy the 5 angstrom molecular sieve (clay product) from any catalyst or dessiccant supplier by the quart or carload. It lasts a long time if it isn't contaminated.by oil, water, or dust. Medical Oxygen machines work for years without major repairs, but they check the O2 quality from them about every 3 - 6 months. The relays and solenoid valves wear out the fastest. Fred > > Michel > > ----- Original Message ----- > From: "Frederick Sparber" <[EMAIL PROTECTED]> > To: <[email protected]> > Sent: Thursday, June 01, 2006 11:58 AM > Subject: Re: O2 enrichment > > > > > > >> I think Fred has a device that enriches O2 based upon > >> some form of filtration. Perhaps he can enlighten us > >> as to the details of its operation and perhaps a > >> patent number? > >> > > You can buy used PSA (Pressure Swing Absorption) Medical Oxygen > > Concentrators > > for a song. The O2 is usually ~ 95% or better with about 6 liters per > > minute delivery. > > With an efficient compressor and valving system they draw about 450 watts. > > > > http://www.gas-plants.com/oxygen-generator.html > > > > "An Oxygen Generator Unit comprises of an air compressor which delivers > > air at moderate pressure. The air is free from oil and dust contamination > > and has low humidity. The temperature of the air is below 40° C. The > > oxygen generation process starts when the pressurized clean air enters one > > of the PSA columns. This column consists of a synthetic zeolite that acts > > as a molecular sieve. As a result of which the sieve separates the oxygen > > from the nitrogen." > > > > "The discharge oxygen pressure for the low pressure units is approximately > > 0.5 bar. If the system is required to drive ceramic oxygen diffusers, a > > delivery pressure of 3 bar is required." >
