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A methodology for long-term model predictive control of hybrid geothermal systems: the shadow-cost formulation

Iago Cupeiro Figueroa, Massimo Cimmino et Lieve Helsen

Article de revue (2020)

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Abstract

Model Predictive Control (MPC) predictive’s nature makes it attractive for controlling high-capacity structures such as thermally activated building systems (TABS). Using weather predictions in the order of days, the system is able to react in advance to changes in the building heating and cooling needs. However, this prediction horizon window may be sub-optimal when hybrid geothermal systems are used, since the ground dynamics are in the order of months and even years. This paper proposes a methodology that includes a shadow-cost in the objective function to take into account the long-term effects that appear in the borefield. The shadow-cost is computed for a given long-term horizon that is discretized over time using predictions of the building heating and cooling needs. The methodology is applied to a case with only heating and active regeneration of the ground thermal balance. Results show that the formulation with the shadow cost is able to optimally use the active regeneration, reducing the overall operational costs at the expenses of an increased computational time. The effects of the shadow cost long-term horizon and the predictions accuracy are also investigated.

Mots clés

hybrid geothermal systems; model predictive control; control-oriented modeling; long-term predictions; shadow cost

Sujet(s): 2100 Génie mécanique > 2100 Génie mécanique
Département: Département de génie mécanique
Organismes subventionnaires: EU within the H2020-EE-2016-RIA-IA programme, Hybrid Low Grade Thermal Energy Systems-Hybrid MPC GEOTABS, InnoEnergy PhD School Programme, European Institute of Technology (EIT)
Numéro de subvention: 723649-MPC
URL de PolyPublie: https://publications.polymtl.ca/9383/
Titre de la revue: Energies (vol. 13, no 23)
Maison d'édition: MDPI
DOI: 10.3390/en13236203
URL officielle: https://doi.org/10.3390/en13236203
Date du dépôt: 16 août 2023 13:21
Dernière modification: 07 avr. 2024 12:36
Citer en APA 7: Cupeiro Figueroa, I., Cimmino, M., & Helsen, L. (2020). A methodology for long-term model predictive control of hybrid geothermal systems: the shadow-cost formulation. Energies, 13(23), 27 pages. https://doi.org/10.3390/en13236203

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