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发表时间：2002-01-01

发表刊物：化工学报

所属单位：能源与动力学院

卷号：53

期号：2

页面范围：172-176

ISSN号：0438-1157

摘要：This paper presents a new approach of superstructure mathematical
   programming combined with total site pinch analysis for utilities and
   multi-processes optimal synthesis. For the heat integration retrofit,
   the total site pinch analysis can give the targets of utilities usage
   and heat recovery, but cannot offer practical designs of optimal
   network. Based on the total site pinch analysis, a superstructure of
   utilities heat exchanger network retrofitting can be built which
   involves only the feasible and better retrofit options. Then an improved
   Mixed Integer Nonlinear Programming (MINLP) model for the network
   superstructure is proposed which contains non-convex non-linear
   objective and constraints. It can be solved with the improved mixed
   continuous evolutionary algorithm. The presentation has advantages of
   making use of the results of total site pinch analysis, reducing the
   scale of superstructure, and having the capability of reaching global
   optimum. A numerical example of energy integration retrofit in a 300000
   t·a~(-1) ethylene plant illustrates that the combined method can reach
   the total site pinch analysis targets (of minimum utilities usage and
   maximum steam generation) and can reach global optimum of utilities heat
   exchanger network.

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