Measuring and testing – Gas analysis – With compensation detail
Patent
1990-06-27
1992-04-07
Williams, Hezron E.
Measuring and testing
Gas analysis
With compensation detail
73 3104, 20415322, G01N 3300
Patent
active
051016567
ABSTRACT:
The oxygen concentration of a gas mixture primarily of oxygen, nitrogen, and argon is determined by measurement of the shell side flow through a hollow fiber permeable membrane module having a tube side and a shell side. A sample of the gas at a low pressure is applied via a gas regulator to the tube side. Compressed air for purge flow is supplied via a first flow controller to one end of the shell side. A small portion of the tube side flow permeates the membrane, enters the shell of the module and combines with the air purge flow. The measurement of the oxygen concentration is determined by the amount of flow exiting the shell side via a flowmeter to a vent. The amount of gas permeating the membrane is dependent on the partial pressure of oxygen on both sides of the membrane. Hence, as the tube side partial pressure increases, a greater quantity of permeated gas passes to the shell side of the membrane. The remaining tube side flow exits the module via a second floor controller to the vent. Signals from the flowmeter, a thermocouple, and a pressure sensor are applied to digital processing circuit each second. The digital processing circuit uses the shell side flow, temperature in degrees Kelvin and pressure converted to an equivalent altitude, and calculates the oxygen concentration in the sample gas by applying equations stored in the digital processing circuit.
REFERENCES:
patent: 2671337 (1954-03-01), Hulsberg
patent: 3367850 (1968-02-01), Johnson
patent: 3518982 (1970-07-01), Timmins et al.
patent: 3545931 (1970-12-01), McKinley, Jr.
patent: 3572994 (1971-03-01), Hochstrasser
patent: 3926561 (1975-12-01), Lucero
patent: 4208902 (1980-06-01), Kim et al.
patent: 4516424 (1985-05-01), Rowland
patent: 4594080 (1988-08-01), Holden et al.
patent: 4765193 (1988-11-01), Leber et al.
patent: 4784675 (1989-03-01), Miller et al.
patent: 4813979 (1989-11-01), Miller et al.
patent: 4880443 (1989-11-01), Miller et al.
Analyzing Gas Mixtures with a Dual-Membrane Counterdiffusion Cell. Air Products and Chemicals, Imc. Bang Mo Kim, Journal of Membrane Science 1980.
Report Sam-TR-80-24 Aircraft Oxygen Generation by Membrane Permeation, Richard L. Johnson M. S. M.B.A. Nov. 1980.
Franz Bernard E.
Kau Shu-Cheng
Singer Donald J.
The United States of America as represented by the Secretary of
Williams Hezron E.
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