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@INPROCEEDINGS{Stock:1005146,
      author       = {Stock, Jan and Arjuna, Felix and Xhonneux, André and
                      Müller, Dirk},
      title        = {{M}odelling of an {E}xisting {D}istrict {H}eating {N}etwork
                      at {D}ifferent {S}upply {T}emperatures with a {N}ew
                      {I}ntegrated {W}aste {H}eat {S}ource},
      reportid     = {FZJ-2023-01334},
      year         = {2022},
      abstract     = {A promising way to make use of waste heat sources is to
                      distribute the heat to nearby buildings via district heating
                      systems to cover the heat demands of the buildings. The
                      integration of a waste heat source into an existing district
                      heating system has to be studied in advance in order to
                      avoid difficulties during network operation and to guarantee
                      the required supply of heat to all connected buildings. The
                      integration possibilities mainly depend on the network
                      topology or rather on the geographical location of the
                      additional heat source and the installed pipes in this
                      area.The situation of implementing a new waste heat source
                      into an existing district heating system arises at the
                      Forschungszentrum Jülich, Germany, as a new supercomputer
                      on the campus emits waste heat at a low-temperature level of
                      around 44°C. To make sensible use of the generated heat,
                      its usage in the high-temperature district heating system of
                      the campus, which supplies heat to the campus buildings at
                      supply temperatures of 95-132°C, is examined.In this case,
                      the temperature level of the waste heat is centrally
                      upgraded by a heat pump. In this work, we focus on the
                      operational behaviour of the district heating network and
                      study the influence of the additional integrated heat source
                      on the network conditions. Therefore, we extend the existing
                      district heating simulation model in Modelica to investigate
                      the district heating operation with multiple heat sources.We
                      test two different control strategies of the additional
                      integrated heat source to investigate their influences on
                      network operating conditions. With the first control
                      strategy, the waste heat source supplies a constant amount
                      of heat, while with the second control strategy, a constant
                      share of the total heat demand is supplied by the waste heat
                      source. In addition, we also simulate different supply
                      temperatures to increase the operation efficiency and to
                      study the impact of lower temperatures on network
                      operation.},
      month         = {Sep},
      date          = {2022-09-13},
      organization  = {8th International Conference on Smart
                       Energy Systems, Aalborg (Denmark), 13
                       Sep 2022 - 14 Sep 2022},
      subtyp        = {Other},
      cin          = {IEK-10},
      cid          = {I:(DE-Juel1)IEK-10-20170217},
      pnm          = {1122 - Design, Operation and Digitalization of the Future
                      Energy Grids (POF4-112)},
      pid          = {G:(DE-HGF)POF4-1122},
      typ          = {PUB:(DE-HGF)6},
      url          = {https://juser.fz-juelich.de/record/1005146},
}