UV solar radiation on a tilted and horizontal plane: Analysis and comparison of 4years of measurements

L.C. Navntoft, P Fernandez Ibanez, F. Garreta

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

A linear correlation between UV-A and 380 nm was developed by means of the TUV 4.1 radiative transfer model. The prediction error of the correlation was evaluated with data from Buenos Aires, Argentina, 2001, and from 2006, Almer ́ıa, Spain. Percent random mean square error (RMSE%) was calculated for intervals of 10° of solar zenith angles, ranging 4.75% at 20° to 37.70% at 90° in clear days and 22.16% at 20° to 26.17% at 90° for cloudy days in Buenos Aires Argentina, and 1.27% at 20° to 11.27% at 90° for clear days in Almeria, Spain. Clouded days were not assessed with the data from Spain. In Argentina, the UV-A radiometer is located in a rural area and the 380 nm radiometer is located in an urban area 6 km away. Hence the real error of the proposed model is closer to that found in Spain were both measurements were performed at the same site. The objective of the work is to achieve a simple and precise method to assess UV-A availability for environmental applications of solar energy, particularly for solar water treatment, at any desired latitude.
LanguageEnglish
Pages307-318
JournalSolar Energy
Volume86
Issue number1
Early online date28 Oct 2011
DOIs
Publication statusE-pub ahead of print - 28 Oct 2011

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radiometer
solar radiation
zenith angle
radiative transfer
rural area
water treatment
urban area
prediction
analysis
comparison
method
solar energy

Keywords

  • UVA irradiance
  • solar radiation
  • pyrometer
  • modelled results

Cite this

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abstract = "A linear correlation between UV-A and 380 nm was developed by means of the TUV 4.1 radiative transfer model. The prediction error of the correlation was evaluated with data from Buenos Aires, Argentina, 2001, and from 2006, Almer ́ıa, Spain. Percent random mean square error (RMSE{\%}) was calculated for intervals of 10° of solar zenith angles, ranging 4.75{\%} at 20° to 37.70{\%} at 90° in clear days and 22.16{\%} at 20° to 26.17{\%} at 90° for cloudy days in Buenos Aires Argentina, and 1.27{\%} at 20° to 11.27{\%} at 90° for clear days in Almeria, Spain. Clouded days were not assessed with the data from Spain. In Argentina, the UV-A radiometer is located in a rural area and the 380 nm radiometer is located in an urban area 6 km away. Hence the real error of the proposed model is closer to that found in Spain were both measurements were performed at the same site. The objective of the work is to achieve a simple and precise method to assess UV-A availability for environmental applications of solar energy, particularly for solar water treatment, at any desired latitude.",
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UV solar radiation on a tilted and horizontal plane: Analysis and comparison of 4years of measurements. / Navntoft, L.C.; Fernandez Ibanez, P; Garreta, F.

Vol. 86, No. 1, 28.10.2011, p. 307-318.

Research output: Contribution to journalArticle

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