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High-resolution spectral atmospheric attenuation measurement for solar power plants

Author

Listed:
  • Heras, Carlos
  • Salinas, Iñigo
  • Andres, Salvador
  • Sevilla, Marina
  • Villafranca, Asier
  • Martinez, David
  • Sanchez, Marcelino

Abstract

One of the main challenges in solar tower renewable technologies is measurement of solar radiation attenuation at the plants at surface level. This paper describes an improved version of the optical spectrum analysis method for measuring solar radiation attenuation in real time at solar tower plants, as presented in a previous work. The new hardware design and calibration process are explained in detail. This new system has a resolution of 0.25 nm in the VIS range and a precision of 0.5% in real time, improving over the state of the art for the measurement of spectral atmospheric attenuation. These specifications allow the assessment of the contribution of different attenuation factors at surface level, such as absorbance peaks (Na, H, H2O) or scattering and the search for correlation with different weather conditions. They also enable experimental validation of atmospheric extinction simulation methods and their parameters. This work also includes the results of a 6 month-long campaign of solar weighted atmospheric extinction measurements at Atlantica's operating central receiver solar plant PS10 at Sanlúcar la Mayor (Seville, Spain). Fluctuations in the daily averaged transmittance greater than 10% are observed, which shows the importance of monitoring this parameter during the operation of solar plants.

Suggested Citation

  • Heras, Carlos & Salinas, Iñigo & Andres, Salvador & Sevilla, Marina & Villafranca, Asier & Martinez, David & Sanchez, Marcelino, 2024. "High-resolution spectral atmospheric attenuation measurement for solar power plants," Renewable Energy, Elsevier, vol. 225(C).
    • Handle: RePEc:eee:renene:v:225:y:2024:i:c:s0960148124003975
    DOI: 10.1016/j.renene.2024.120332
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