PERSONAL DE APOYO
CAMUSSI Nelida Beatriz
artículos
Título:
"Synthesis of Flexible Heat Exchangers Networks - I. Convex Networks"
Autor/es:
J. CERDÁ; M.R.GALLI; N. CAMUSSI; M.A.ISLA
Revista:
COMPUTERS AND CHEMICAL ENGINEERING
Editorial:
PERGAMON-ELSEVIER SCIENCE LTD
Referencias:
Lugar: Amsterdam; Año: 1990 vol. 14 p. 197 - 211
ISSN:
0098-1354
Resumen:
A new methodology for the optimal synthesis of structurally flexible heat exchanger networks
is presented. Since the stream supply temperatures arc specified by ranges rather than fixed values, the
sought network design must be able to reach the target temperatures for any realization of the uncertain
parameters. Moreover, it should always require a minimum utility consumption. To this end, an optimal
heat recovery strategy is derived by using the notion of transient and permanent process streams. Based
on it, a novel version of the heat cascade which assumes a continuous pinch behavior is developed to
determine: (i) the heat recovery targets to be achieved by the network; and (ii) the dominant pinch
temperatures constraining the heat exchanges and defining the problem subnetworks. They constitute the
building blocks of an MILP mathematical formulation through which a structurally ftexible network
featuring the least number of units is found. Unlike prior attempts, a feasibility condition handled as a
model restriction eliminates the need for flexibility tests.
A couple of examples involving convex pinch domains have been successfully solved in a short computer
time. This shows a slight increase with the number of uncertainties. The method has been extended to
the synthesis of nonconvex networks in Part II.