Energy Integration of Large-Scale Industrial Sites with Target-Compatible Sub-System Division Strategy

This paper presents a targeting strategy to solve the heat load distribution (HLD) problem for large-scale plant by dividing the system into sub-systems while considering the heat transfer opportunities between them. The methodology is based on a sequential approach. The optimal flow rates of utilities are first defined using a Mixed Integer Linear Programming (MILP) model. The site is then divided into the subsystems where the overall interaction is resumed into a pair of virtual hot and cold stream with nonlinear T-H profile. The HLD problem is solved between these subsystems in a sequential procedure by considering a MILP model between these virtual representative streams, while each time one of the sub-systems is switched from virtual streams to the real ones. The main advantages are to reduce the size of the HLD problem and to find a feasible solution which is compatible with the minimum energy requirement (MER) objective. The potential of direct heat recovery between sub-systems are considered and the method can be practically adopted to consider the restricted matches between sub-systems as well. This methodology has been currently applied on a real site scale process integration industrial example and in this paper its application is illustrated through a case study with 23 streams.

Varbanov, Ps
Klemes, Jj
Liew, Py
Yong, Jy
Stehlik, P
Published in:
Pres 2014, 17Th Conference On Process Integration, Modelling And Optimisation For Energy Saving And Pollution Reduction, Pts 1-3, 39, 43-48
Presented at:
17th Conference on Process Integration, Modelling and Optimisation for Energy Saving and Pollution Reduction (PRES 2014), Prague, CZECH REPUBLIC, AUG 23-27, 2014
Milano, Aidic Servizi Srl

 Record created 2015-02-20, last modified 2018-03-17

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