Nice! How much does a used unit cost roughly Fred, and what's the valving system and the "pressure swing" for? 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)
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."
