Large-Scale Dynamic Optimization of an Integrated Cryogenic Process

MARIELA RODRIGUEZ; M. SOLEDAD DIAZ

Computer Aided Chemical Engineering

Elsevier

Lugar: Amsterdam; Año: 2006 vol. 21 p. 1477 - 1482

1570-7946

This work addresses the dynamic optimization of an energy integrated large-scale cryogenic separation plant through a simultaneous approach. The differential algebraic (DAE) optimization problem has been solved through a simultaneous dynamic optimization approach that transforms the problem into a large scale nonlinear program (NLP) through discretization of the entire set of variables by collocation on finite elements. Prior to this discretization, the Method of Lines is applied to transform the original distributed parameter problem into an initial value one. The dynamic model provides profiles of controlled and manipulated variables. Numerical results show the advantage of using a simultaneous approach to solve models of highly integrated processes that include path constraints.