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Shape optimization of a long-tapered R134a ejector mixing chamber

Author

Listed:
  • Sierra-Pallares, José
  • García del Valle, Javier
  • Paniagua, Jorge Muñoz
  • García, Javier
  • Méndez-Bueno, César
  • Castro, Francisco

Abstract

The purpose of this investigation is to develop a computational methodology for the shape optimization of long-tapered mixing chambers of refrigerant ejectors based on the internal entropy generation. The workflow of the aforementioned methodology includes a one dimensional model to generate a baseline geometry. Then a design of experiments is performed around a parametrization of the baseline geometry and the resulting combinations are introduced in the CFD model. Based on the CFD entropy generation results, a surrogate model is trained and further used to determine the optimum geometry for the mixing chamber. The application of the surrogate model is not straightforward, but rather a loop style routine has been programmed in order to assure a global minimum rather than a local one.

Suggested Citation

  • Sierra-Pallares, José & García del Valle, Javier & Paniagua, Jorge Muñoz & García, Javier & Méndez-Bueno, César & Castro, Francisco, 2018. "Shape optimization of a long-tapered R134a ejector mixing chamber," Energy, Elsevier, vol. 165(PA), pages 422-438.
    • Handle: RePEc:eee:energy:v:165:y:2018:i:pa:p:422-438
    DOI: 10.1016/j.energy.2018.09.057
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    References listed on IDEAS

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    1. Besagni, Giorgio & Mereu, Riccardo & Inzoli, Fabio, 2016. "Ejector refrigeration: A comprehensive review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 53(C), pages 373-407.
    2. Sciacovelli, A. & Verda, V. & Sciubba, E., 2015. "Entropy generation analysis as a design tool—A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 43(C), pages 1167-1181.
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    Cited by:

    1. Besagni, Giorgio, 2019. "Ejectors on the cutting edge: The past, the present and the perspective," Energy, Elsevier, vol. 170(C), pages 998-1003.
    2. Van den Berghe, Jan & Dias, Bruno R.B. & Bartosiewicz, Yann & Mendez, Miguel A., 2023. "A 1D model for the unsteady gas dynamics of ejectors," Energy, Elsevier, vol. 267(C).
    3. Ll Macia & R. Castilla & P. J. Gamez-Montero & S. Camacho & E. Codina, 2019. "Numerical Simulation of a Supersonic Ejector for Vacuum Generation with Explicit and Implicit Solver in Openfoam," Energies, MDPI, vol. 12(18), pages 1-17, September.

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