Measurement of ultraviolet radiation and correlation to direct normal irradiance
The DLR operates a solar furnace at the site near Cologne for experiments in material research and solar chemistry. For these activities that make use of concentrating systems the direct normal irradiances are of main importance. Especially for the photochemistry the shorter wavelengths in the visible part of the solar spectrum and the ultraviolet region are important. for collecting operational data, for statistical purpose, and for measuring the solar furnace input power the DLR operates also a meteorological station that besides temperature, rain, and wind data records several important irradiance parameters like direct normal or direct normal narrowband UVA and UVB. In order to compare measured data to model predictions the authors performed a correlation analysis between LOWTRAN results and direct normal irradiance and measurements of UVA at 368 nm and UVB at 306 nm. It shows that on clear summer days and high direct normal irradiances of about 800 W/m{sup 2} the model data agree well with the UVA measurements. In the UVB the deviation is larger. On sunny days with thin cloud coverage the data show more scattering and higher UV intensities compared to the model at similar elevation angles. Empirical correlation functions are proposed for modeling the UVA and UVB measurements.
- Research Organization:
- Hauptabteilung Energietechnik, Koeln (DE)
- OSTI ID:
- 20030615
- Resource Relation:
- Conference: Renewable and advanced energy systems for the 21st Century, Maui, HI (US), 04/11/1999--04/15/1999; Other Information: 1 CD-ROM. Operating system required: Windows i386, i486, Pentium or Pentium Pro, MS Windows 3.1, 95 or NT3.51; Macintosh, Power Macintosh with a 68020 or greater processor, System software version 7.1, 3.5 MB RAM; UNIX; PBD: 1999; Related Information: In: Renewable and advanced energy systems for the 21st century, RAES'99: Proceedings, by Hogan, R.; Kim, Y.; Kleis, S.; O'Neal, D.; Tanaka, T. [eds.], [1125] pages.
- Country of Publication:
- United States
- Language:
- English
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