Notes on Measuring Concentration Ratio Distribution for a Solar Tower Using Moonlight
DOI:
https://doi.org/10.52825/solarpaces.v2i.927Keywords:
Concentration Ratio Distribution, Moonlight Concentration, Flux Mapping, Solar Tower, Solar Dish, Deep LearningAbstract
The authors' original concept of indirect solar flux mapping of a heliostat field measures CRD using a compact stationary array of moonlight illuminometers on the receiver aperture and a reference moonlight illuminometer on the dual-axis moon tracker. Two sets of moonlight concentration experiments (CCD camera + white target; concentrated lunar beam passing across the linear array of illuminators) were carried out on 63 heliostats at Badaling Solar Tower Power Plant in Beijing on a full moon night in 2018. How the sun and moon shapes differ for CRD as light sources on a solar dish is investigated. Solar/lunar CRDs are similar. Another lunar flux mapping model is also presented, allowing different moon shapes to estimate the solar CRD and contribute improvements in extrapolating measured lunar CRDs to a solar tower working with the real Sun by repeated smooth-filtering. In this paper, some unknown factors, effects, and improvements are carefully considered to enhance the CRD measurement accuracy of a solar tower power plant by using moonlight concentration.
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A. Ferriere, M. Volut, A. Perez and Y. Volut, "In-situ measurement of concentrated solar flux and distribution at the aperture of a central solar receiver," AIP Conf. Proc., vol. 1734, no.1, 130007, May, 2016, doi: https://doi.org/10.1063/1.4949217.
C.K. Ho, S.S. Khalsa and D.D. Gill, "Evaluation of a new tool for heliostat field flux mapping," Proceedings of SolarPACES 2011, SAND2011-5353C, Sep., 2011, https://www.osti.gov/biblio/1140911.
C.K. Ho and S.S. Khalsa, "A photographic flux mapping method for concentrating solar collectors and receivers," J. Sol. Energy Eng., vol.134, no.4, 041004 (8 pages), Nov., 2012, doi: https://doi.org/10.1115/1.4006892.
C. Raeder, M. Offergeld, M. Roeger, A. Lademann, J. Zoeller, M. Glinka, J. Escamilla and A. Kaempgen, "Proof of concept: Real-time flux density monitoring system on external tube receivers for optimized solar field operation," ICB-REV 2022, Jan., 2023, doi: https://doi.org/10.1063/5.0148725.
"SolarPACES Technology Award 2021 for DLR Solar Research and CSP Services." Winners of the 2021 SolarPACES Awards: Technology Innovation Award: DLR Solar Research and CSP Services for their solar flux measurement system. https://www.solarpaces.org/wp-content/uploads/SolarPACES-Award-2021.pdf.
M. Guo, X. Wang, N. Wang, F. Sun, X. Zhang and Z. Wang, "Moonlight concentration experiments of Badaling solar tower power plant in Beijing," AIP Conf. Proc., vol. 2303, no.1, 050001, Dec., 2020, doi: https://doi.org/10.1063/5.0028526.
H. Wang, M. Guo and Z. Wang, "Calculation model of moonlight concentration ratio distribution for solar dish concentrator," ACTA ENERGIAE SOLARIS SINICA, vol.43, no.9, pp. 148–154, Sept., 2022, doi: https://doi.org/10.19912/j.0254-0096.tynxb.2021-0216.
M. Guo, H. Wang, Z. Wang, X. Zhang, F. Sun and N. Wang, "Model for measuring concentration ratio distribution of a dish concentrator using moonlight as a precursor for solar tower flux mapping," AIMS Energy, vol.9, no.4, pp. 727–754, Jun., 2021, https://doi.org/10.3934/energy.2021034.
F. Xu, J. Wang, M. Guo, Z. Wang, " Prediction of solar concentration flux distribution for a heliostat based on lunar concentration image and generative adversarial networks," APPLIED ARTIFICIAL INTELLIGENCE, vol.38, no.1, e2332114 (21 pages), Mar. 2024, https://doi.org/10.1080/08839514.2024.2332114.
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Copyright (c) 2024 Minghuan Guo, Zhifeng Wang, Xiliang Zhang, Hao Wang, Ying Wu, Jian Wang
This work is licensed under a Creative Commons Attribution 4.0 International License.
Accepted 2024-07-10
Published 2024-08-28
Funding data
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National Natural Science Foundation of China
Grant numbers 51976058;61671429
