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Energies 2017, 10(12), 2039;

Improving an Integer Linear Programming Model of an Ecovat Buffer by Adding Long-Term Planning

Department EEMCS, University of Twente, Enschede 7522 NB, The Netherlands
Author to whom correspondence should be addressed.
Received: 21 September 2017 / Revised: 24 November 2017 / Accepted: 30 November 2017 / Published: 3 December 2017
(This article belongs to the Special Issue Selected Papers from International Workshop of Energy-Open)
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The Ecovat is a seasonal thermal storage solution consisting of a large underground water tank divided into a number of virtual segments that can be individually charged and discharged. The goal of the Ecovat is to supply heat demand to a neighborhood throughout the entire year. In this work, we extend an integer linear programming model to describe the charging and discharging of such an Ecovat buffer by adding a long-term (yearly) planning step to the model. We compare the results from the model using this extension to previously obtained results and show significant improvements when looking at the combination of costs and the energy content of the buffer at the end of the optimization. Furthermore, we show that the model is very robust against prediction errors. For this, we compare two different cases: one case in which we assume perfect predictions are available and one case in which we assume no predictions are available. The largest observed difference in costs between these two cases is less than 2%. View Full-Text
Keywords: smart grids; seasonal thermal storage; modeling; integer linear programming smart grids; seasonal thermal storage; modeling; integer linear programming

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Goeijen, G.J.H.; Smit, G.J.M.; Hurink, J.L. Improving an Integer Linear Programming Model of an Ecovat Buffer by Adding Long-Term Planning. Energies 2017, 10, 2039.

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