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@ARTICLE{Vaupel:877460,
      author       = {Vaupel, Yannic and Huster, Wolfgang R. and Holtorf,
                      Flemming and Mhamdi, Adel and Mitsos, Alexander},
      title        = {{A}nalysis and improvement of dynamic heat exchanger models
                      for nominal and start-up operation},
      journal      = {Energy},
      volume       = {169},
      issn         = {0360-5442},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier Science},
      reportid     = {FZJ-2020-02213},
      pages        = {1191 - 1201},
      year         = {2019},
      abstract     = {For control-oriented modeling of heat exchangers, the two
                      predominant model types are the moving boundary (MB)
                      approach and the finite volume (FV) method. In this
                      contribution, we assess both approaches. As a case study, we
                      present an organic Rankine cycle (ORC) for waste heat
                      recovery (WHR), for which experimental data is available.
                      For simulation of nominal operation, we observe that the MB
                      approach requires less CPU time than the FV method, even for
                      a low number of cells, which is in agreement with
                      literature. In the start-up case, where only subcooled
                      liquid is present, analysis of the MB model reveals that the
                      model can exhibit an unphysical inverse response in outlet
                      enthalpy due to its averaging assumption. This problem can
                      be circumvented via the use of a hybrid MB-FV model or an
                      adjusted averaging assumption. A simulation study based on
                      experimental data shows that both proposed solution
                      approaches can be successfully employed.},
      cin          = {IEK-10},
      ddc          = {600},
      cid          = {I:(DE-Juel1)IEK-10-20170217},
      pnm          = {899 - ohne Topic (POF3-899)},
      pid          = {G:(DE-HGF)POF3-899},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000459528500096},
      doi          = {10.1016/j.energy.2018.12.048},
      url          = {https://juser.fz-juelich.de/record/877460},
}