Revista: | Brazilian journal of chemical engineering |
Base de datos: | PERIÓDICA |
Número de sistema: | 000308795 |
ISSN: | 0104-6632 |
Autors: | Oliveira, S.G1 Liporace, F.S Araujo, O.Q.F Queiroz, E.M |
Institucions: | 1Universidade Federal do Rio de Janeiro, Escola de Quimica, Rio de Janeiro. Brasil |
Any: | 2001 |
Període: | Jun |
Volum: | 18 |
Número: | 2 |
Paginació: | 195-210 |
País: | Brasil |
Idioma: | Inglés |
Tipo de documento: | Artículo |
Enfoque: | Experimental, aplicado |
Resumen en inglés | Cost optimization in the synthesis decision tree often leads to a reduced degree of freedom which degrades the process’s ability to reject disturbances as a consequence of low controllability. In fact, Heat Exchanger Networks (HENs) obtained by traditional synthesis procedures that ignore controllability aspects must be evaluated in this context a posteriori. The aim of this work was to develop a procedure that includes RGA and SVD measures of controllability, which are solely based on steady state information, thereby freeing the synthesis procedure of the cumbersome dynamic analysis. When a structure is defined during a traditional HEN synthesis procedure, a degree of freedom analysis is approached as a simulation problem. Next, an optimization is performed, since new variables are usually added to increase the degree of freedom of the HEN in order to render it controllable. A key point in the proposed procedure is the inference of controllability based on the proposed controllability measures, which also provide a control scheme by pairing controlled and manipulated variables during the process design. A HEN reported in the literature is used to illustrate the proposed procedure. The steady state simulator Aspen Plus and the dynamic simulator Aspen Dynamics (Aspentech, Inc.) were employed |
Disciplines | Química, Ingeniería |
Paraules clau: | Ingeniería de control, Ingeniería química, Redes de intercambio de calor, Optimización de costos, Control |
Keyword: | Chemistry, Engineering, Chemical engineering, Control engineering, Heat exchanger networks, Cost optimization, Control |
Text complet: | Texto completo (Ver HTML) |