In order to address the challenge of pressure swing adsorption system
optimization, an optimization framework based on pseudo transient
continuation method was used and vacuum rapid pressure swing adsorption
process for oxygen production as a typical example. A pseudo transient
model library was established and a robust two-stage dynamic tearing
model was proposed to deal with the cyclic steady state conditions.
Furthermore, the time constants were discussed and a practical time
constant strategy and expressions were proposed for the stability and
efficiency of calculation. Finally, reduced successive quadratic
programming and time relaxation algorithm were used for the optimization
of the two systems respectively, and the optimization results showed
that although the simulation time of pseudo transient system is slightly
higher than that of single discretization system, the optimization
expense of single discretization system in two cases were 5.7 times and
11.6 times of that of pseudo transient system respectively.