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Aiming factor to flatten the flux distribution on cylindrical receivers

Author

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  • Sánchez-González, Alberto
  • Rodríguez-Sánchez, María Reyes
  • Santana, Domingo

Abstract

High incident flux gradients and hot spots lead to extreme thermal stresses that may damage and reduce the lifetime of central receivers. An aiming strategy based on a single parameter, k, named aiming factor, is developed to generate symmetric flux maps about the receiver equator. By means of this k factor, ranging between 3 (generally equivalent to equatorial aiming) and 0 (alternatively aiming to top and bottom borders), the solar flux incident on the receiver and the spillage losses can be controlled. For each sector in a heliostat field, the aiming factor values causing the flattest symmetric flux maps, kflat, are deterministically found with a sweep and mesh shifting procedure. Results for Dunhuang solar power tower plant show that kflat is fairly constant throughout the year, except near sunrise and sunset in east and west sectors, respectively./

Suggested Citation

  • Sánchez-González, Alberto & Rodríguez-Sánchez, María Reyes & Santana, Domingo, 2018. "Aiming factor to flatten the flux distribution on cylindrical receivers," Energy, Elsevier, vol. 153(C), pages 113-125.
    • Handle: RePEc:eee:energy:v:153:y:2018:i:c:p:113-125
    DOI: 10.1016/j.energy.2018.04.002
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    References listed on IDEAS

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    1. Wang, Kun & He, Ya-Ling & Xue, Xiao-Dai & Du, Bao-Cun, 2017. "Multi-objective optimization of the aiming strategy for the solar power tower with a cavity receiver by using the non-dominated sorting genetic algorithm," Applied Energy, Elsevier, vol. 205(C), pages 399-416.
    2. Yu, Qiang & Wang, Zhifeng & Xu, Ershu, 2014. "Analysis and improvement of solar flux distribution inside a cavity receiver based on multi-focal points of heliostat field," Applied Energy, Elsevier, vol. 136(C), pages 417-430.
    3. Sánchez-González, Alberto & Santana, Domingo, 2015. "Solar flux distribution on central receivers: A projection method from analytic function," Renewable Energy, Elsevier, vol. 74(C), pages 576-587.
    4. Ashley, Thomas & Carrizosa, Emilio & Fernández-Cara, Enrique, 2017. "Optimisation of aiming strategies in Solar Power Tower plants," Energy, Elsevier, vol. 137(C), pages 285-291.
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    Citations

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    Cited by:

    1. Conroy, Tim & Collins, Maurice N. & Fisher, James & Grimes, Ronan, 2018. "Thermal and mechanical analysis of a sodium-cooled solar receiver operating under a novel heliostat aiming point strategy," Applied Energy, Elsevier, vol. 230(C), pages 590-614.
    2. Rodríguez-Sánchez, M.R. & Laporte-Azcué, M. & Montoya, A. & Hernández-Jiménez, F., 2022. "Non-conventional tube shapes for lifetime extend of solar external receivers," Renewable Energy, Elsevier, vol. 186(C), pages 535-546.
    3. Laporte-Azcué, M. & Rodríguez-Sánchez, M.R. & González-Gómez, P.A. & Santana, D., 2021. "Assessment of the time resolution used to estimate the central solar receiver lifetime," Applied Energy, Elsevier, vol. 301(C).
    4. Collado, Francisco J. & Guallar, Jesus, 2019. "Quick design of regular heliostat fields for commercial solar tower power plants," Energy, Elsevier, vol. 178(C), pages 115-125.
    5. Rodríguez-Sánchez, M.R. & Sánchez-González, A. & Santana, D., 2019. "Field-receiver model validation against Solar Two tests," Renewable and Sustainable Energy Reviews, Elsevier, vol. 110(C), pages 43-52.
    6. García, Jesús & Barraza, Rodrigo & Soo Too, Yen Chean & Vásquez-Padilla, Ricardo & Acosta, David & Estay, Danilo & Valdivia, Patricio, 2022. "Transient simulation of a control strategy for solar receivers based on mass flow valves adjustments and heliostats aiming," Renewable Energy, Elsevier, vol. 185(C), pages 1221-1244.
    7. Conroy, Tim & Collins, Maurice N. & Grimes, Ronan, 2020. "A review of steady-state thermal and mechanical modelling on tubular solar receivers," Renewable and Sustainable Energy Reviews, Elsevier, vol. 119(C).
    8. Wang, Qiliang & Li, Guiqiang & Cao, Jingyu & Hu, Mingke & Pei, Gang & Yang, Hongxing, 2022. "An analytical study on optimal spectral characters of solar absorbing coating and thermal performance potential of solar power tower," Renewable Energy, Elsevier, vol. 200(C), pages 1300-1315.
    9. Yang, Honglun & Li, Jing & Huang, Yihang & Kwan, Trevor Hocksun & Cao, Jingyu & Pei, Gang, 2020. "Feasibility research on a hybrid solar tower system using steam and molten salt as heat transfer fluid," Energy, Elsevier, vol. 205(C).

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