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@ARTICLE{Stock:1052084,
author = {Stock, Jan and Xhonneux, André and Müller, Dirk},
title = {{O}ptimisation of district heating network separation: {A}n
extended approach for partial transformation of large-scale
network structures},
journal = {Energy},
volume = {344},
issn = {0360-5442},
address = {Amsterdam [u.a.]},
publisher = {Elsevier Science},
reportid = {FZJ-2026-00752},
pages = {139737 -},
year = {2026},
abstract = {The decentralisation of existing district heating systems
by network separation is a promising approach for district
heating transformation. A district heating network is
separated into several smaller district heating network
structures that can be individually adapted, e.g. in
relation to the existing network structure or concerning the
properties of the local buildings supplied, such as the
temperature requirements of their heating systems. In this
work, an approach for the optimal separation of existing
district heating networks is expanded, which enables the
decentralisation of a specific district heating system and
the partial transformation of the separated network
depending on the heat source utilised and the local district
heating system conditions. The approach first identifies
coherent network areas through community detection and
aggregation, then optimises network separation and the
installation of heat pumps, and finally evaluates the
arising district heating network systems through district
heating network simulations. The individual steps of this
approach are adapted to be applicable to large district
heating network structures, e.g. to handle the great number
of separation options. The approach is applied to two
existing district heating systems with over four thousand
buildings supplied. Two types of utilised waste heat sources
are investigated, a sewage plant with fluctuating
temperatures and an electrolyser with a dynamic operation
schedule. The results show favourable transformation
alternatives for existing district heating networks, as the
separated network areas are transformed by reducing supply
temperatures depending on the heat source potential utilised
and the temperature requirements of the buildings supplied.},
cin = {ICE-1},
ddc = {600},
cid = {I:(DE-Juel1)ICE-1-20170217},
pnm = {1122 - Design, Operation and Digitalization of the Future
Energy Grids (POF4-112)},
pid = {G:(DE-HGF)POF4-1122},
typ = {PUB:(DE-HGF)16},
doi = {10.1016/j.energy.2025.139737},
url = {https://juser.fz-juelich.de/record/1052084},
}