Customized solvers for the operational planning and scheduling of utility systems

Alexandras M. Strouvalis, Istvan Heckl, Ferenc Friedler, Antonis C. Kokossis

Research output: Contribution to journalConference article

6 Citations (Scopus)


The paper explains a paradigm for the integration of engineering knowledge with the search strategy of a Branch and Bound algorithm. The optimization is fairly generic and addresses industrial applications comprising power-generating units. The solution concerns the allocation of the units over time and considers expected variations in the heat load and power. The engineering knowledge exploits the Hardware Composites, a conceptual tool for the operation of utility systems. The knowledge is capitalized at three different levels: (i) to exclude redundant combinations of decision variables, (ii) to prioritize the branching of the algorithm, and (iii) to prune the binary tree. Using a non-commercial LP, an MILP solver is designed and compared with highly-valued, state-of-the-art commercial solvers. The comparisons are particularly impressive in that the customized development outperforms the sophisticated packages and accommodates accelerations of at least two orders of magnitude. (C) 2000 Elsevier Science Ltd.

Original languageEnglish
Pages (from-to)487-493
Number of pages7
JournalComputers and Chemical Engineering
Issue number2-7
Publication statusPublished - Jul 15 2000
Event7th International Symposium on Process Systems Engineering - Keystone, CO, USA
Duration: Jul 16 2000Jul 21 2000


  • Branch and bound
  • Hardware composites
  • Operational planning
  • Solver design
  • Utility networks

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Computer Science Applications

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