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001     1052084
005     20260126203621.0
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024 7 _ |a 1873-6785
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024 7 _ |a 10.34734/FZJ-2026-00752
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100 1 _ |a Stock, Jan
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245 _ _ |a Optimisation of district heating network separation: An extended approach for partial transformation of large-scale network structures
260 _ _ |a Amsterdam [u.a.]
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520 _ _ |a 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.
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700 1 _ |a Xhonneux, André
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700 1 _ |a Müller, Dirk
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773 _ _ |a 10.1016/j.energy.2025.139737
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