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Thermohydraulic model of Smart Thermal Grids with bidirectional power flow between prosumers

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  • Licklederer, Thomas
  • Hamacher, Thomas
  • Kramer, Michael
  • Perić, Vedran S.

Abstract

Part of Smart Energy Systems are Smart Thermal Grids, which enable bidirectional power flow between prosumers. To facilitate this feature, the network architecture and intelligent control of the decentralized actuators are a major challenge. Therefore, methods for the analysis of prosumer-dominated thermal networks are needed, including the hydraulic actuators and the heat transfer to the prosumers. This paper derives a holistic mathematical system representation that allows to investigate the relations between the control variables of such networks and their thermohydraulic steady-state. At first a suitable network architecture concept is introduced. Based on this, balance equations are combined with common physical models for the network components. Explicitly considered are the heat transfer to the secondary side, flexible prosumer modes and the behavior of decentralized control pumps and valves depending on their control inputs. The resulting system of equations is discussed in the context of two use cases: a) simulation of the system state for given control inputs and b) determining the necessary control inputs for target heat exchanges (optimal control). Exemplary simulation results are presented. For the simulation use case a Python code is provided on Github under open source license, based on the derived model.

Suggested Citation

  • Licklederer, Thomas & Hamacher, Thomas & Kramer, Michael & Perić, Vedran S., 2021. "Thermohydraulic model of Smart Thermal Grids with bidirectional power flow between prosumers," Energy, Elsevier, vol. 230(C).
    • Handle: RePEc:eee:energy:v:230:y:2021:i:c:s0360544221010732
    DOI: 10.1016/j.energy.2021.120825
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    7. Gianni Martinazzoli & Daniele Pasinelli & Adriano Maria Lezzi & Mariagrazia Pilotelli, 2023. "Design of a 5th Generation District Heating Substation Prototype for a Real Case Study," Sustainability, MDPI, vol. 15(4), pages 1-21, February.

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