| Journal: | Brazilian journal of chemical engineering |
| Database: | PERIÓDICA |
| System number: | 000308795 |
| ISSN: | 0104-6632 |
| Authors: | Oliveira, S.G1 Liporace, F.S Araujo, O.Q.F Queiroz, E.M |
| Institutions: | 1Universidade Federal do Rio de Janeiro, Escola de Quimica, Rio de Janeiro. Brasil |
| Year: | 2001 |
| Season: | Jun |
| Volumen: | 18 |
| Number: | 2 |
| Pages: | 195-210 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Experimental, aplicado |
| English abstract | 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 |
| Keyword: | 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 |
| Full text: | Texto completo (Ver HTML) |
