Method of controlling a gas separating apparatus

Details Method of controlling a gas separating apparatus Method of controlling a gas separating apparatus

2011-07-19

2011-07-19

Greene, Jason M (Department: 1776)

Gas separation: processes

With control responsive to sensed condition

Concentration sensed

C095S001000, C095S019000, C096S421000, C128S204230, C128S204260

Reexamination Certificate

active

07981193

ABSTRACT:
A method of controlling an apparatus for separating product gas and non product gas from an air supply, the concentration of the product gas produced by the apparatus being variable depending on a control signal from a controller and the efficiency of the apparatus in producing product gas depending upon an environmental parameter, the method including sensing the oxygen concentration in the product gas produced by the apparatus, determining an instantaneous demand for oxygen concentration in the product gas, providing to the controller a process variable signal indicative of the sensed concentration of the oxygen in the product gas, and providing to the controller a demand input signal indicative of the demand, sensing the environmental parameter and providing an environmental parameter input signal to the controller, comparing the process variable signal and the demand signal to generate an error signal indicative of a change in oxygen concentration in the product gas required to match the instantaneous demand, conditioning the error signal to derive a control signal to control the apparatus to satisfy the demand, characterised in that the conditioning of the error signal is compensated to derive the control signal, depending upon the environmental parameter input signal.

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Carlson (Supplemental Oxygen for the General Aviation Pilot) 1998, <http://www.dr-amy.com/rich/oxygen/>.
Bequette (“Process Control: Modeling, Design and Simulation”) Prentice Hall 2003, pp. 155-160 and 168-172.
Beh et al. “The Control of the Vacuum Swing Adsorption Process for Air Separation” from Adsorption Science and Technology Proceedings of the Second Pacific Basin Conference Brisbane, Australia, May 14-18, 2000 Do (University of Queensland) pp. 663-667.

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