Control of flow networks with constraints and optimality conditions

Scholten, T. W. 2017 [Groningen]: Rijksuniversiteit Groningen. 162 p.

Research output: ScientificDoctoral Thesis

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  • Tjeert Wobko Scholten
More than 40% of the total consumed energy is used for space heating and most of it is generated form fossil fuels. Fortunately there is a shift towards more sustainable sources such as geothermal energy, waste heat and heat pumps. However the supply of these heat sources can be intermittent and is often not co-located with the demand. For this reason a district heating network with storage capabilities can be used for the transportation and security of delivery. A downside is that some heat dispersion occurs in the transportation pipes. This dispersion can be lowered when smaller pipes are used, but this increases the friction in the pipes. To overcome this, the number of pumps in these networks can be increased.
Due to the extra pumps and the introduction of multiple producers that are not nessecarily owned by the same entity it follows that the next generation of heat networks require new control strategies in which communication is crucial. In this thesis we design and analyze such control strategies to optimally coordinate the generation and regulate the storage levels such that the heat supply can be guaranteed. In order to guarantee scalability, avoid a single point of failure and minimize the information that companies need to share, we suggest a distributed mechanism that uses a peer-to-peer communication network. We also design controllers that can regulate the pressure in a network with multiple pumps. As these pumps can often only generate positive pressures we guarantee that this constraint is satisfied.
Original languageEnglish
QualificationDoctor of Philosophy
Awarding Institution
Award date6-Oct-2017
Place of Publication[Groningen]
Print ISBNs978-94-034-0060-0
Electronic ISBNs978-94-034-0059-4
StatePublished - 2017

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