A Multi-Criteria Analysis of Bidirectional Solar District Heating Substation Architecture

Lamaison, Nicolas; Bavière, Roland; Chèze, David; Paulus, Cédric

doi:10.18086/swc.2017.10.02

Cited by 6 publications

(4 citation statements)

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“…2) DGUs: From a hydraulic viewpoint, a DGU may comprise two main parts, as illustrated in Fig. 6: a circulation circuit (red) [36], [37] and an optional pressure holding unit [7, pp. 54-55].…”

Section: B Edge Dynamics 1) Pipesmentioning

confidence: 99%

A Unifying Passivity-Based Framework for Pressure and Volume Flow Rate Control in District Heating Networks

Strehle,

Machado,

Cucuzzella

et al. 2024

IEEE Trans. Contr. Syst. Technol.

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A fundamental precondition for the operation of district heating networks (DHNs) is a stable hydraulic behavior. However, the ongoing transition toward a sustainable heat supply, especially the rising integration of distributed heat sources and the increasingly meshed topologies, introduces complex and potentially destabilizing hydraulic dynamics. In this work, we propose a unifying, equilibrium-independent passivity (EIP)based control framework, which guarantees asymptotic stability of any feasible, hydraulic DHN equilibrium for a wide range of DHN setups covering different DHN generations, meshed, time-varying topologies, and multiple, dynamically interacting distributed heat sources. The obtained results hold for the state of the art as well as future DHN generations featuring, for example, multiple distributed heat sources, asymmetric pipe networks, and multiple temperature layers.

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Section: B Edge Dynamics 1) Pipesmentioning

confidence: 99%

A Unifying Passivity-Based Framework for Pressure and Volume Flow Rate Control in District Heating Networks

Strehle,

Machado,

Cucuzzella

et al. 2024

IEEE Trans. Contr. Syst. Technol.

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“…2) DGUs: From a hydraulic viewpoint, a DGU may comprise two main parts as illustrated in Fig. 5: a circulation circuit (red) (see [39], [40]) and an optional pressure holding unit (see [6, pp. 54-55]).…”

Section: B Edge Dynamics 1) Pipesmentioning

confidence: 99%

Port-Hamiltonian Modeling of Hydraulics in 4th Generation District Heating Networks

Strehle

Machado

Cucuzzella

et al. 2022

2022 IEEE 61st Conference on Decision and Control (CDC)

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A fundamental precondition for the secure and efficient operation of district heating networks (DHNs) is a stable hydraulic behavior. However, the ongoing transition towards a sustainable heat supply, especially the rising integration of distributed heat sources and the increasingly meshed topologies, introduce complex and potentially destabilizing hydraulic dynamics. In this work, we propose a unifying, passivity-based framework which guarantees asymptotic stability of any forced hydraulic DHN equilibrium while allowing for meshed, timevarying topologies and different, dynamically interacting distributed heat sources. To establish the desired hydraulic equilibria, we propose decentralized, passivity-based pressure and volume flow rate controllers for the pumps and valves in the actuated DHN subsystems. In particular, we leverage the equilibriumindependent passivity (EIP) properties of the DHN subsystems, the skew-symmetric nature of their interconnections, and LaSalle's Invariance principle to assess asymptotic stability in a modular manner. The obtained results hold for the state-of-theart as well as future DHN generations featuring, for example, multiple distributed heat sources, asymmetric pipe networks, and multiple temperature layers. We verify our findings by means of simulations. * * F. Strehle and J. Machado contributed equally.* * * The work of J.

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“…Different features (local usage, network connection and control strategy) were then combined to propose various architectures. After pros and cons listing, solutions involving complete reinjection of the heat into the DHN seemed the most promising (Lamaison et al, 2017), leading to the technical drawing shown in Fig. 1.…”

Section: Architecturementioning

confidence: 99%

“…In the frame of the Horizon 2020 THERMOSS project, specifications, modeling and prototype testing of a 2-way substation with the solar field connected on the primary side is performed. While the specifications and modeling approach were presented respectively in Lamaison et al (2017) and Lamaison et al (2018), the present paper deals with the design and original test approach of a BSST prototype combining hardware-in-the-loop and real experimental DHN.…”

Section: Introduction and State-of-the-artmentioning

confidence: 99%

Operational Behaviour of a Solar-Fed Bidirectional Substation for 4GDH Networks

Lamaison¹,

Chèze²,

Robin³

et al. 2021

Proceedings of the ISES Solar World Congress 2021

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Decentralized feed-in of solar surplus heat from prosumers into a District Heating Network is here addressed. A specified architecture combining a Return/Supply connection, a set of valves, a feed-in pump and a primary side connection of the solar field led to the conception and fabrication of a bidirectional substation prototype. The latter is tested in a hardware-in-the-loop configuration regarding the consumer and solar field sides while the DHN side of the substation prototype is connected to a real DHN. A 12-days sequence, representative of typical days, with varying solar irradiation, DHN thermo-hydraulic conditions and consumer demands is performed with the prototype. A set of indicators showed i) an inappropriate behavior of the controller during the coldest days, ii) various improvements of the solar fraction during the hottest days (with up to 52% of total solar fraction) and iii) rather good performances of the controller (about 90% effectiveness). The analysis was completed by the observation of detailed dynamic result for one day. Different operating regimes (full DHN consumption, solar self-consumption complemented by the DHN, solar self-consumption and feed-in) could be observed during a single day highlighting the modularity of the BSST to switch automatically (by hydraulic balancing) from one mode to the other.

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A Multi-Criteria Analysis of Bidirectional Solar District Heating Substation Architecture

Cited by 6 publications

References 0 publications

A Unifying Passivity-Based Framework for Pressure and Volume Flow Rate Control in District Heating Networks

A Unifying Passivity-Based Framework for Pressure and Volume Flow Rate Control in District Heating Networks

Port-Hamiltonian Modeling of Hydraulics in 4th Generation District Heating Networks

Operational Behaviour of a Solar-Fed Bidirectional Substation for 4GDH Networks

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