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Optimizing water tanks in water distribution systems by combining network reduction, mathematical optimization and hydraulic simulation

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  • Corinna Hallmann

    (University of Paderborn)

  • Leena Suhl

    (University of Paderborn)

Abstract

In the last two decades, water consumption in Germany has been decreasing, which causes the water tanks and pipes in water distribution systems to work inefficiently. This paper proposes a method that supports the planning process for tanks in water distribution systems. The method uses a combination of network reduction, mathematical optimization and hydraulic simulation. The mathematical optimization model is a non-convex Mixed Integer Quadratically Constrained Program (MIQCP) that is solved by a piecewise linearization. As this may lead to many binary variables and therefore high computing times, the size of the water distribution system model is reduced before building the optimization model. After applying several network reduction techniques and using a piecewise approximation of the original model, there may be some hydraulic differences between the original network model and the reduced network model. To make sure that the solution obtained in the optimization process is feasible in the original water distribution system model, the solution is verified by a hydraulic simulation. If the solution is not feasible, the reduced model has to be modified and solved again until the hydraulic simulation verifies a solution as feasible. In this paper, each of these processes is described and the results indicate the usefulness of each of them.

Suggested Citation

  • Corinna Hallmann & Leena Suhl, 2016. "Optimizing water tanks in water distribution systems by combining network reduction, mathematical optimization and hydraulic simulation," OR Spectrum: Quantitative Approaches in Management, Springer;Gesellschaft für Operations Research e.V., vol. 38(3), pages 577-595, July.
    • Handle: RePEc:spr:orspec:v:38:y:2016:i:3:d:10.1007_s00291-015-0403-1
    DOI: 10.1007/s00291-015-0403-1
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    References listed on IDEAS

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    1. J. B. Mantell & L.S. Lasdon, 1977. "A GRG Algorithm for Econometric Control Problems," NBER Chapters, in: Annals of Economic and Social Measurement, Volume 6, number 5, pages 581-597, National Bureau of Economic Research, Inc.
    2. da Conceicao Cunha, Maria & Ribeiro, Luisa, 2004. "Tabu search algorithms for water network optimization," European Journal of Operational Research, Elsevier, vol. 157(3), pages 746-758, September.
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    Cited by:

    1. Johann Hurink & Rüdiger Schultz & David Wozabal, 2016. "Quantitative solutions for future energy systems and markets," OR Spectrum: Quantitative Approaches in Management, Springer;Gesellschaft für Operations Research e.V., vol. 38(3), pages 541-543, July.

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