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Global Methods for Calculating Shading and Blocking Efficiency in Central Receiver Systems

Author

Listed:
  • Guillermo Ortega

    (E.T.S. Ingeniería, Universidad de Huelva (UHU), Campus El Carmen, Avd. Tres de Marzo, s/n, 21071 Huelva, Spain)

  • Rubén Barbero

    (E.T.S. Ingenieros Industriales, Universidad Nacional de Educación a Distancia (UNED), C/Juan del Rosal, 12, 28040 Madrid, Spain)

  • Antonio Rovira

    (E.T.S. Ingenieros Industriales, Universidad Nacional de Educación a Distancia (UNED), C/Juan del Rosal, 12, 28040 Madrid, Spain)

Abstract

This paper presents three new methods for calculating the shading and blocking efficiency in Central Receiver Systems (CRSs). All of them are characterized by the calculation of multiple useful and total reflecting areas without the need to resort to parallel calculation in the CPU or GPU, and by low computation times and minimum errors. They are being specially designed for implementation in codes focused on heliostat field design and optimization in CRSs. The proposed methods have been compared against two outstanding “individual” methods ( homology and Boolean operations ), in addition to a reference case based on the Monte Carlo ray-tracing (MCRT) technique. The results indicate that one of the proposed methods presents reduced error values and high computational speed, even relaxing the restrictions on candidate filtering. At the same error level, the global method is up to 7.80 times faster than the fastest individual method ( homology ) and up to 194 times faster than the method based on the MCRT technique. The causes of the main errors of each method are also analyzed.

Suggested Citation

  • Guillermo Ortega & Rubén Barbero & Antonio Rovira, 2024. "Global Methods for Calculating Shading and Blocking Efficiency in Central Receiver Systems," Energies, MDPI, vol. 17(6), pages 1-18, March.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:6:p:1282-:d:1353104
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    References listed on IDEAS

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    1. Ortega, Guillermo & Rovira, Antonio, 2020. "A fast and accurate methodology for the calculation of the shading and blocking efficiency in central receiver systems," Renewable Energy, Elsevier, vol. 154(C), pages 58-70.
    2. Besarati, Saeb M. & Yogi Goswami, D., 2014. "A computationally efficient method for the design of the heliostat field for solar power tower plant," Renewable Energy, Elsevier, vol. 69(C), pages 226-232.
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