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@PHDTHESIS{Noureldin:771557,
      author       = {Noureldin, Kareem},
      othercontributors = {Pitz-Paal, Robert and Mitsos, Alexander},
      title        = {{M}odelling and control of transients in parabolic trough
                      power plants with single-phase heat transfer fluids},
      school       = {Rheinisch-Westfälische Technische Hochschule Aachen},
      type         = {Dissertation},
      address      = {Aachen},
      reportid     = {RWTH-2019-10244},
      pages        = {1 Online-Ressource (xxiii, 155 Seiten) : Illustrationen,
                      Diagramme},
      year         = {2018},
      note         = {Veröffentlicht auf dem Publikationsserver der RWTH Aachen
                      University 2019; Dissertation, Rheinisch-Westfälische
                      Technische Hochschule Aachen, 2018},
      abstract     = {Optimizing solar field operation and control during
                      transient processes, like passing clouds and solar field
                      start-up, is key to improve the competitiveness of
                      line-focus solar thermal power plants in comparison to other
                      renewable energy technologies. Although Simulation tools
                      play a significant role in the design and optimization
                      procedures, common solar field computational models cannot
                      predict the behaviour of such a system exposed to high
                      degrees of, both, temporal and spatial variability in the
                      energy input. Some very detailed tools can only simulate
                      parts of the system within acceptable time and computational
                      power, and hence, they are not utilized as platforms to test
                      new concepts under realistic operation conditions. On the
                      other hand, tests in pilot or full-sized solar fields not
                      only are too costly to prove a concept, but it is also
                      nearly impossible to reproduce a transient test case with
                      exactly the same disturbances to provide fair comparisons.
                      Thus, a novel transient solar field model, the Virtual Solar
                      Field (VSF), is developed within the scope of this thesis.
                      The model couples a static hydraulic flow model with a
                      detailed dynamic loop model making use of the different time
                      scales in the system. This results in an accurate and
                      computationally efficient simulation tool for commercial
                      power plants scale, such that, for example, 10 hours of
                      Andasol-III solar field operation can be simulated in under
                      10 minutes. VSF has been validated against solar field
                      operation data from Andasol-III as presented in the thesis.
                      Also new control schemes that use direct normal irradiance
                      (DNI) maps from nowcasting systems, as well as single loop
                      valve control have been implemented and tested in VSF. A
                      controller performance assessment scheme based on energy
                      output and conversion efficiency has been developed to
                      estimate the expected revenues of the solar field within the
                      simulated time. This provides information to quantify the
                      benefits of using one control strategy over another. The
                      availability of the simulation tool also paves the way for
                      developing model-predictive control strategies to optimize
                      the field operation and production.},
      cin          = {412910},
      ddc          = {620},
      cid          = {$I:(DE-82)412910_20140620$},
      typ          = {PUB:(DE-HGF)11},
      doi          = {10.18154/RWTH-2019-10244},
      url          = {https://publications.rwth-aachen.de/record/771557},
}