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@ARTICLE{Vaupel:889893,
      author       = {Vaupel, Yannic and Huster, Wolfgang R. and Mhamdi, Adel and
                      Mitsos, Alexander},
      title        = {{O}ptimal operating policies for organic {R}ankine cycles
                      for waste heat recovery under transient conditions},
      reportid     = {FZJ-2021-00501},
      year         = {2021},
      abstract     = {Waste heat recovery for trucks via organic Rankine cycle is
                      a promising technology to reduce fuel consumption and
                      emissions. As the vehicles are operated in street traffic,
                      the heat source is subject to strong fluctuations.
                      Consequently, such disturbances have to be considered to
                      enable safe and efficient operation. Herein, we find optimal
                      operating policies for several representative scenarios by
                      means of dynamic optimization and discuss the implications
                      on control strategy design. First, we optimize operation of
                      a typical driving cycle with data from a test rig. Results
                      indicate that operating the cycle at minimal superheat is an
                      appropriate operating policy. Second, we consider a scenario
                      where the permissible expander power is temporarily limited,
                      which is realistic in street traffic. In this case, an
                      operating policy with flexible superheat can reduce the
                      losses associated with operation at minimal superheat by up
                      to 53 $\%$ in the considered scenario. As the duration of
                      power limitation increases, other constraints might become
                      active which results in part of the exhaust gas being
                      bypassed, hence reduced savings.},
      cin          = {IEK-10},
      cid          = {I:(DE-Juel1)IEK-10-20170217},
      pnm          = {1121 - Digitalization and Systems Technology for
                      Flexibility Solutions (POF4-112)},
      pid          = {G:(DE-HGF)POF4-1121},
      typ          = {PUB:(DE-HGF)25},
      eprint       = {2101.03381},
      howpublished = {arXiv:2101.03381},
      archivePrefix = {arXiv},
      SLACcitation = {$\%\%CITATION$ = $arXiv:2101.03381;\%\%$},
      url          = {https://juser.fz-juelich.de/record/889893},
}