% IMPORTANT: The following is UTF-8 encoded. This means that in the presence
% of non-ASCII characters, it will not work with BibTeX 0.99 or older.
% Instead, you should use an up-to-date BibTeX implementation like “bibtex8” or
% “biber”.
@PHDTHESIS{Stock:1020339,
author = {Stock, Jan},
othercontributors = {Müller, Dirk and Felsmann, Clemens},
title = {{S}eparation of existing district heating networks for
optimal utilisation of sustainable heat sources; 1.
{A}uflage},
volume = {147},
school = {Rheinisch-Westfälische Technische Hochschule Aachen},
type = {Dissertation},
address = {Aachen},
publisher = {E.ON Energy Research Center, RWTH Aachen University},
reportid = {RWTH-2025-08912},
isbn = {978-3-948234-61-4},
series = {E.ON Energy Research Center},
pages = {V, XVII, 185 Seiten : Illustrationen},
year = {2025},
note = {Druckausgabe: 2025. - Auch veröffentlicht auf dem
Publikationsserver der RWTH Aachen University; Dissertation,
Rheinisch-Westfälische Technische Hochschule Aachen, 2025},
abstract = {The integration of sustainable heat sources into district
heating systems is crucial to reduce the mainly fossil-based
heat supply in the building sector. However, the utilisation
of heat sources in existing district heating systems can be
challenging due to their low-temperature level or
unfavourable location in relation to the network structure.
One promising approach to mitigate the difficulty of heat
source utilisation is the decentralisation of existing
district heating systems through network separation to
enable a partial transformation of the separated network
structure, depending on the local building requirements and
the characteristics of the heat source utilised.In this
thesis, a framework is developed that shows optimal network
separation and partial transformation depending on the given
district heating network structure and the heat source to be
utilised. This framework comprises three main steps: (i)
identification of coherent areas in a network structure by
community detection, (ii) determination of the optimal
network area for separation, while optimising the partial
transformation of the separated district heating network by
installing required heat pumps and (iii) simulation of the
arising district heating networks to evaluate the feasible
operation and sufficient heat supply to all buildings. In
the district heating transformation process, it is essential
to reduce the supply temperatures in the district heating
network. Therefore, the potential to supply existing
buildings in a district heating system with lower supply
temperatures than specified by the nominal design
temperature of the building heating system is analysed in
detail. A method is contributed that enables a fast
estimation of the actual supply temperature requirement of a
building heating system using minimal input data. The
developed framework for district heating network separation
is tested with networks of different structures and sizes.
The results show individual network separations that are
influenced, for example, by the conditions of the utilised
heat source or the focused optimisation objective. In
addition, the revealed potential to supply building heating
systems with lower supply temperatures than originally
specified influences the decisions on separation and
transformation. Finally, the detailed simulation of the
arising district heating networks identifies critical areas
for insufficient heat supply, from which various measures
can be derived. The results obtained underline that network
separation and partial transformation is a promising
alternative approach for the efficient utilisation of
sustainable heat sources and thus for the decarbonisation of
existing district heating infrastructure.},
cin = {419510 / 080052},
ddc = {620},
cid = {$I:(DE-82)419510_20140620$ / $I:(DE-82)080052_20160101$},
typ = {PUB:(DE-HGF)11 / PUB:(DE-HGF)3},
doi = {10.18154/RWTH-2025-08912},
url = {https://publications.rwth-aachen.de/record/1020339},
}
guest ::